Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * createplan.c
4 : * Routines to create the desired plan for processing a query.
5 : * Planning is complete, we just need to convert the selected
6 : * Path into a Plan.
7 : *
8 : * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
9 : * Portions Copyright (c) 1994, Regents of the University of California
10 : *
11 : *
12 : * IDENTIFICATION
13 : * src/backend/optimizer/plan/createplan.c
14 : *
15 : *-------------------------------------------------------------------------
16 : */
17 : #include "postgres.h"
18 :
19 : #include "access/sysattr.h"
20 : #include "access/transam.h"
21 : #include "catalog/pg_class.h"
22 : #include "foreign/fdwapi.h"
23 : #include "miscadmin.h"
24 : #include "nodes/extensible.h"
25 : #include "nodes/makefuncs.h"
26 : #include "nodes/nodeFuncs.h"
27 : #include "optimizer/clauses.h"
28 : #include "optimizer/cost.h"
29 : #include "optimizer/optimizer.h"
30 : #include "optimizer/paramassign.h"
31 : #include "optimizer/pathnode.h"
32 : #include "optimizer/paths.h"
33 : #include "optimizer/placeholder.h"
34 : #include "optimizer/plancat.h"
35 : #include "optimizer/planmain.h"
36 : #include "optimizer/prep.h"
37 : #include "optimizer/restrictinfo.h"
38 : #include "optimizer/subselect.h"
39 : #include "optimizer/tlist.h"
40 : #include "parser/parse_clause.h"
41 : #include "parser/parsetree.h"
42 : #include "partitioning/partprune.h"
43 : #include "tcop/tcopprot.h"
44 : #include "utils/lsyscache.h"
45 :
46 :
47 : /*
48 : * Flag bits that can appear in the flags argument of create_plan_recurse().
49 : * These can be OR-ed together.
50 : *
51 : * CP_EXACT_TLIST specifies that the generated plan node must return exactly
52 : * the tlist specified by the path's pathtarget (this overrides both
53 : * CP_SMALL_TLIST and CP_LABEL_TLIST, if those are set). Otherwise, the
54 : * plan node is allowed to return just the Vars and PlaceHolderVars needed
55 : * to evaluate the pathtarget.
56 : *
57 : * CP_SMALL_TLIST specifies that a narrower tlist is preferred. This is
58 : * passed down by parent nodes such as Sort and Hash, which will have to
59 : * store the returned tuples.
60 : *
61 : * CP_LABEL_TLIST specifies that the plan node must return columns matching
62 : * any sortgrouprefs specified in its pathtarget, with appropriate
63 : * ressortgroupref labels. This is passed down by parent nodes such as Sort
64 : * and Group, which need these values to be available in their inputs.
65 : *
66 : * CP_IGNORE_TLIST specifies that the caller plans to replace the targetlist,
67 : * and therefore it doesn't matter a bit what target list gets generated.
68 : */
69 : #define CP_EXACT_TLIST 0x0001 /* Plan must return specified tlist */
70 : #define CP_SMALL_TLIST 0x0002 /* Prefer narrower tlists */
71 : #define CP_LABEL_TLIST 0x0004 /* tlist must contain sortgrouprefs */
72 : #define CP_IGNORE_TLIST 0x0008 /* caller will replace tlist */
73 :
74 :
75 : static Plan *create_plan_recurse(PlannerInfo *root, Path *best_path,
76 : int flags);
77 : static Plan *create_scan_plan(PlannerInfo *root, Path *best_path,
78 : int flags);
79 : static List *build_path_tlist(PlannerInfo *root, Path *path);
80 : static bool use_physical_tlist(PlannerInfo *root, Path *path, int flags);
81 : static List *get_gating_quals(PlannerInfo *root, List *quals);
82 : static Plan *create_gating_plan(PlannerInfo *root, Path *path, Plan *plan,
83 : List *gating_quals);
84 : static Plan *create_join_plan(PlannerInfo *root, JoinPath *best_path);
85 : static bool mark_async_capable_plan(Plan *plan, Path *path);
86 : static Plan *create_append_plan(PlannerInfo *root, AppendPath *best_path,
87 : int flags);
88 : static Plan *create_merge_append_plan(PlannerInfo *root, MergeAppendPath *best_path,
89 : int flags);
90 : static Result *create_group_result_plan(PlannerInfo *root,
91 : GroupResultPath *best_path);
92 : static ProjectSet *create_project_set_plan(PlannerInfo *root, ProjectSetPath *best_path);
93 : static Material *create_material_plan(PlannerInfo *root, MaterialPath *best_path,
94 : int flags);
95 : static Memoize *create_memoize_plan(PlannerInfo *root, MemoizePath *best_path,
96 : int flags);
97 : static Gather *create_gather_plan(PlannerInfo *root, GatherPath *best_path);
98 : static Plan *create_projection_plan(PlannerInfo *root,
99 : ProjectionPath *best_path,
100 : int flags);
101 : static Plan *inject_projection_plan(Plan *subplan, List *tlist,
102 : bool parallel_safe);
103 : static Sort *create_sort_plan(PlannerInfo *root, SortPath *best_path, int flags);
104 : static IncrementalSort *create_incrementalsort_plan(PlannerInfo *root,
105 : IncrementalSortPath *best_path, int flags);
106 : static Group *create_group_plan(PlannerInfo *root, GroupPath *best_path);
107 : static Unique *create_unique_plan(PlannerInfo *root, UniquePath *best_path, int flags);
108 : static Agg *create_agg_plan(PlannerInfo *root, AggPath *best_path);
109 : static Plan *create_groupingsets_plan(PlannerInfo *root, GroupingSetsPath *best_path);
110 : static Result *create_minmaxagg_plan(PlannerInfo *root, MinMaxAggPath *best_path);
111 : static WindowAgg *create_windowagg_plan(PlannerInfo *root, WindowAggPath *best_path);
112 : static SetOp *create_setop_plan(PlannerInfo *root, SetOpPath *best_path,
113 : int flags);
114 : static RecursiveUnion *create_recursiveunion_plan(PlannerInfo *root, RecursiveUnionPath *best_path);
115 : static LockRows *create_lockrows_plan(PlannerInfo *root, LockRowsPath *best_path,
116 : int flags);
117 : static ModifyTable *create_modifytable_plan(PlannerInfo *root, ModifyTablePath *best_path);
118 : static Limit *create_limit_plan(PlannerInfo *root, LimitPath *best_path,
119 : int flags);
120 : static SeqScan *create_seqscan_plan(PlannerInfo *root, Path *best_path,
121 : List *tlist, List *scan_clauses);
122 : static SampleScan *create_samplescan_plan(PlannerInfo *root, Path *best_path,
123 : List *tlist, List *scan_clauses);
124 : static Scan *create_indexscan_plan(PlannerInfo *root, IndexPath *best_path,
125 : List *tlist, List *scan_clauses, bool indexonly);
126 : static BitmapHeapScan *create_bitmap_scan_plan(PlannerInfo *root,
127 : BitmapHeapPath *best_path,
128 : List *tlist, List *scan_clauses);
129 : static Plan *create_bitmap_subplan(PlannerInfo *root, Path *bitmapqual,
130 : List **qual, List **indexqual, List **indexECs);
131 : static void bitmap_subplan_mark_shared(Plan *plan);
132 : static TidScan *create_tidscan_plan(PlannerInfo *root, TidPath *best_path,
133 : List *tlist, List *scan_clauses);
134 : static TidRangeScan *create_tidrangescan_plan(PlannerInfo *root,
135 : TidRangePath *best_path,
136 : List *tlist,
137 : List *scan_clauses);
138 : static SubqueryScan *create_subqueryscan_plan(PlannerInfo *root,
139 : SubqueryScanPath *best_path,
140 : List *tlist, List *scan_clauses);
141 : static FunctionScan *create_functionscan_plan(PlannerInfo *root, Path *best_path,
142 : List *tlist, List *scan_clauses);
143 : static ValuesScan *create_valuesscan_plan(PlannerInfo *root, Path *best_path,
144 : List *tlist, List *scan_clauses);
145 : static TableFuncScan *create_tablefuncscan_plan(PlannerInfo *root, Path *best_path,
146 : List *tlist, List *scan_clauses);
147 : static CteScan *create_ctescan_plan(PlannerInfo *root, Path *best_path,
148 : List *tlist, List *scan_clauses);
149 : static NamedTuplestoreScan *create_namedtuplestorescan_plan(PlannerInfo *root,
150 : Path *best_path, List *tlist, List *scan_clauses);
151 : static Result *create_resultscan_plan(PlannerInfo *root, Path *best_path,
152 : List *tlist, List *scan_clauses);
153 : static WorkTableScan *create_worktablescan_plan(PlannerInfo *root, Path *best_path,
154 : List *tlist, List *scan_clauses);
155 : static ForeignScan *create_foreignscan_plan(PlannerInfo *root, ForeignPath *best_path,
156 : List *tlist, List *scan_clauses);
157 : static CustomScan *create_customscan_plan(PlannerInfo *root,
158 : CustomPath *best_path,
159 : List *tlist, List *scan_clauses);
160 : static NestLoop *create_nestloop_plan(PlannerInfo *root, NestPath *best_path);
161 : static MergeJoin *create_mergejoin_plan(PlannerInfo *root, MergePath *best_path);
162 : static HashJoin *create_hashjoin_plan(PlannerInfo *root, HashPath *best_path);
163 : static Node *replace_nestloop_params(PlannerInfo *root, Node *expr);
164 : static Node *replace_nestloop_params_mutator(Node *node, PlannerInfo *root);
165 : static void fix_indexqual_references(PlannerInfo *root, IndexPath *index_path,
166 : List **stripped_indexquals_p,
167 : List **fixed_indexquals_p);
168 : static List *fix_indexorderby_references(PlannerInfo *root, IndexPath *index_path);
169 : static Node *fix_indexqual_clause(PlannerInfo *root,
170 : IndexOptInfo *index, int indexcol,
171 : Node *clause, List *indexcolnos);
172 : static Node *fix_indexqual_operand(Node *node, IndexOptInfo *index, int indexcol);
173 : static List *get_switched_clauses(List *clauses, Relids outerrelids);
174 : static List *order_qual_clauses(PlannerInfo *root, List *clauses);
175 : static void copy_generic_path_info(Plan *dest, Path *src);
176 : static void copy_plan_costsize(Plan *dest, Plan *src);
177 : static void label_sort_with_costsize(PlannerInfo *root, Sort *plan,
178 : double limit_tuples);
179 : static void label_incrementalsort_with_costsize(PlannerInfo *root, IncrementalSort *plan,
180 : List *pathkeys, double limit_tuples);
181 : static SeqScan *make_seqscan(List *qptlist, List *qpqual, Index scanrelid);
182 : static SampleScan *make_samplescan(List *qptlist, List *qpqual, Index scanrelid,
183 : TableSampleClause *tsc);
184 : static IndexScan *make_indexscan(List *qptlist, List *qpqual, Index scanrelid,
185 : Oid indexid, List *indexqual, List *indexqualorig,
186 : List *indexorderby, List *indexorderbyorig,
187 : List *indexorderbyops,
188 : ScanDirection indexscandir);
189 : static IndexOnlyScan *make_indexonlyscan(List *qptlist, List *qpqual,
190 : Index scanrelid, Oid indexid,
191 : List *indexqual, List *recheckqual,
192 : List *indexorderby,
193 : List *indextlist,
194 : ScanDirection indexscandir);
195 : static BitmapIndexScan *make_bitmap_indexscan(Index scanrelid, Oid indexid,
196 : List *indexqual,
197 : List *indexqualorig);
198 : static BitmapHeapScan *make_bitmap_heapscan(List *qptlist,
199 : List *qpqual,
200 : Plan *lefttree,
201 : List *bitmapqualorig,
202 : Index scanrelid);
203 : static TidScan *make_tidscan(List *qptlist, List *qpqual, Index scanrelid,
204 : List *tidquals);
205 : static TidRangeScan *make_tidrangescan(List *qptlist, List *qpqual,
206 : Index scanrelid, List *tidrangequals);
207 : static SubqueryScan *make_subqueryscan(List *qptlist,
208 : List *qpqual,
209 : Index scanrelid,
210 : Plan *subplan);
211 : static FunctionScan *make_functionscan(List *qptlist, List *qpqual,
212 : Index scanrelid, List *functions, bool funcordinality);
213 : static ValuesScan *make_valuesscan(List *qptlist, List *qpqual,
214 : Index scanrelid, List *values_lists);
215 : static TableFuncScan *make_tablefuncscan(List *qptlist, List *qpqual,
216 : Index scanrelid, TableFunc *tablefunc);
217 : static CteScan *make_ctescan(List *qptlist, List *qpqual,
218 : Index scanrelid, int ctePlanId, int cteParam);
219 : static NamedTuplestoreScan *make_namedtuplestorescan(List *qptlist, List *qpqual,
220 : Index scanrelid, char *enrname);
221 : static WorkTableScan *make_worktablescan(List *qptlist, List *qpqual,
222 : Index scanrelid, int wtParam);
223 : static RecursiveUnion *make_recursive_union(List *tlist,
224 : Plan *lefttree,
225 : Plan *righttree,
226 : int wtParam,
227 : List *distinctList,
228 : Cardinality numGroups);
229 : static BitmapAnd *make_bitmap_and(List *bitmapplans);
230 : static BitmapOr *make_bitmap_or(List *bitmapplans);
231 : static NestLoop *make_nestloop(List *tlist,
232 : List *joinclauses, List *otherclauses, List *nestParams,
233 : Plan *lefttree, Plan *righttree,
234 : JoinType jointype, bool inner_unique);
235 : static HashJoin *make_hashjoin(List *tlist,
236 : List *joinclauses, List *otherclauses,
237 : List *hashclauses,
238 : List *hashoperators, List *hashcollations,
239 : List *hashkeys,
240 : Plan *lefttree, Plan *righttree,
241 : JoinType jointype, bool inner_unique);
242 : static Hash *make_hash(Plan *lefttree,
243 : List *hashkeys,
244 : Oid skewTable,
245 : AttrNumber skewColumn,
246 : bool skewInherit);
247 : static MergeJoin *make_mergejoin(List *tlist,
248 : List *joinclauses, List *otherclauses,
249 : List *mergeclauses,
250 : Oid *mergefamilies,
251 : Oid *mergecollations,
252 : bool *mergereversals,
253 : bool *mergenullsfirst,
254 : Plan *lefttree, Plan *righttree,
255 : JoinType jointype, bool inner_unique,
256 : bool skip_mark_restore);
257 : static Sort *make_sort(Plan *lefttree, int numCols,
258 : AttrNumber *sortColIdx, Oid *sortOperators,
259 : Oid *collations, bool *nullsFirst);
260 : static IncrementalSort *make_incrementalsort(Plan *lefttree,
261 : int numCols, int nPresortedCols,
262 : AttrNumber *sortColIdx, Oid *sortOperators,
263 : Oid *collations, bool *nullsFirst);
264 : static Plan *prepare_sort_from_pathkeys(Plan *lefttree, List *pathkeys,
265 : Relids relids,
266 : const AttrNumber *reqColIdx,
267 : bool adjust_tlist_in_place,
268 : int *p_numsortkeys,
269 : AttrNumber **p_sortColIdx,
270 : Oid **p_sortOperators,
271 : Oid **p_collations,
272 : bool **p_nullsFirst);
273 : static Sort *make_sort_from_pathkeys(Plan *lefttree, List *pathkeys,
274 : Relids relids);
275 : static IncrementalSort *make_incrementalsort_from_pathkeys(Plan *lefttree,
276 : List *pathkeys, Relids relids, int nPresortedCols);
277 : static Sort *make_sort_from_groupcols(List *groupcls,
278 : AttrNumber *grpColIdx,
279 : Plan *lefttree);
280 : static Material *make_material(Plan *lefttree);
281 : static Memoize *make_memoize(Plan *lefttree, Oid *hashoperators,
282 : Oid *collations, List *param_exprs,
283 : bool singlerow, bool binary_mode,
284 : uint32 est_entries, Bitmapset *keyparamids,
285 : Cardinality est_calls,
286 : Cardinality est_unique_keys,
287 : double est_hit_ratio);
288 : static WindowAgg *make_windowagg(List *tlist, WindowClause *wc,
289 : int partNumCols, AttrNumber *partColIdx, Oid *partOperators, Oid *partCollations,
290 : int ordNumCols, AttrNumber *ordColIdx, Oid *ordOperators, Oid *ordCollations,
291 : List *runCondition, List *qual, bool topWindow,
292 : Plan *lefttree);
293 : static Group *make_group(List *tlist, List *qual, int numGroupCols,
294 : AttrNumber *grpColIdx, Oid *grpOperators, Oid *grpCollations,
295 : Plan *lefttree);
296 : static Unique *make_unique_from_pathkeys(Plan *lefttree,
297 : List *pathkeys, int numCols,
298 : Relids relids);
299 : static Gather *make_gather(List *qptlist, List *qpqual,
300 : int nworkers, int rescan_param, bool single_copy, Plan *subplan);
301 : static SetOp *make_setop(SetOpCmd cmd, SetOpStrategy strategy,
302 : List *tlist, Plan *lefttree, Plan *righttree,
303 : List *groupList, Cardinality numGroups);
304 : static LockRows *make_lockrows(Plan *lefttree, List *rowMarks, int epqParam);
305 : static Result *make_gating_result(List *tlist, Node *resconstantqual,
306 : Plan *subplan);
307 : static Result *make_one_row_result(List *tlist, Node *resconstantqual,
308 : RelOptInfo *rel);
309 : static ProjectSet *make_project_set(List *tlist, Plan *subplan);
310 : static ModifyTable *make_modifytable(PlannerInfo *root, Plan *subplan,
311 : CmdType operation, bool canSetTag,
312 : Index nominalRelation, Index rootRelation,
313 : List *resultRelations,
314 : List *updateColnosLists,
315 : List *withCheckOptionLists, List *returningLists,
316 : List *rowMarks, OnConflictExpr *onconflict,
317 : List *mergeActionLists, List *mergeJoinConditions,
318 : int epqParam);
319 : static GatherMerge *create_gather_merge_plan(PlannerInfo *root,
320 : GatherMergePath *best_path);
321 :
322 :
323 : /*
324 : * create_plan
325 : * Creates the access plan for a query by recursively processing the
326 : * desired tree of pathnodes, starting at the node 'best_path'. For
327 : * every pathnode found, we create a corresponding plan node containing
328 : * appropriate id, target list, and qualification information.
329 : *
330 : * The tlists and quals in the plan tree are still in planner format,
331 : * ie, Vars still correspond to the parser's numbering. This will be
332 : * fixed later by setrefs.c.
333 : *
334 : * best_path is the best access path
335 : *
336 : * Returns a Plan tree.
337 : */
338 : Plan *
339 392888 : create_plan(PlannerInfo *root, Path *best_path)
340 : {
341 : Plan *plan;
342 :
343 : /* plan_params should not be in use in current query level */
344 : Assert(root->plan_params == NIL);
345 :
346 : /* Initialize this module's workspace in PlannerInfo */
347 392888 : root->curOuterRels = NULL;
348 392888 : root->curOuterParams = NIL;
349 :
350 : /* Recursively process the path tree, demanding the correct tlist result */
351 392888 : plan = create_plan_recurse(root, best_path, CP_EXACT_TLIST);
352 :
353 : /*
354 : * Make sure the topmost plan node's targetlist exposes the original
355 : * column names and other decorative info. Targetlists generated within
356 : * the planner don't bother with that stuff, but we must have it on the
357 : * top-level tlist seen at execution time. However, ModifyTable plan
358 : * nodes don't have a tlist matching the querytree targetlist.
359 : */
360 392618 : if (!IsA(plan, ModifyTable))
361 330109 : apply_tlist_labeling(plan->targetlist, root->processed_tlist);
362 :
363 : /*
364 : * Attach any initPlans created in this query level to the topmost plan
365 : * node. (In principle the initplans could go in any plan node at or
366 : * above where they're referenced, but there seems no reason to put them
367 : * any lower than the topmost node for the query level. Also, see
368 : * comments for SS_finalize_plan before you try to change this.)
369 : */
370 392618 : SS_attach_initplans(root, plan);
371 :
372 : /* Check we successfully assigned all NestLoopParams to plan nodes */
373 392618 : if (root->curOuterParams != NIL)
374 0 : elog(ERROR, "failed to assign all NestLoopParams to plan nodes");
375 :
376 : /*
377 : * Reset plan_params to ensure param IDs used for nestloop params are not
378 : * re-used later
379 : */
380 392618 : root->plan_params = NIL;
381 :
382 392618 : return plan;
383 : }
384 :
385 : /*
386 : * create_plan_recurse
387 : * Recursive guts of create_plan().
388 : */
389 : static Plan *
390 1118947 : create_plan_recurse(PlannerInfo *root, Path *best_path, int flags)
391 : {
392 : Plan *plan;
393 :
394 : /* Guard against stack overflow due to overly complex plans */
395 1118947 : check_stack_depth();
396 :
397 1118947 : switch (best_path->pathtype)
398 : {
399 396119 : case T_SeqScan:
400 : case T_SampleScan:
401 : case T_IndexScan:
402 : case T_IndexOnlyScan:
403 : case T_BitmapHeapScan:
404 : case T_TidScan:
405 : case T_TidRangeScan:
406 : case T_SubqueryScan:
407 : case T_FunctionScan:
408 : case T_TableFuncScan:
409 : case T_ValuesScan:
410 : case T_CteScan:
411 : case T_WorkTableScan:
412 : case T_NamedTuplestoreScan:
413 : case T_ForeignScan:
414 : case T_CustomScan:
415 396119 : plan = create_scan_plan(root, best_path, flags);
416 396119 : break;
417 113154 : case T_HashJoin:
418 : case T_MergeJoin:
419 : case T_NestLoop:
420 113154 : plan = create_join_plan(root,
421 : (JoinPath *) best_path);
422 113154 : break;
423 20235 : case T_Append:
424 20235 : plan = create_append_plan(root,
425 : (AppendPath *) best_path,
426 : flags);
427 20235 : break;
428 471 : case T_MergeAppend:
429 471 : plan = create_merge_append_plan(root,
430 : (MergeAppendPath *) best_path,
431 : flags);
432 471 : break;
433 396166 : case T_Result:
434 396166 : if (IsA(best_path, ProjectionPath))
435 : {
436 255350 : plan = create_projection_plan(root,
437 : (ProjectionPath *) best_path,
438 : flags);
439 : }
440 140816 : else if (IsA(best_path, MinMaxAggPath))
441 : {
442 296 : plan = (Plan *) create_minmaxagg_plan(root,
443 : (MinMaxAggPath *) best_path);
444 : }
445 140520 : else if (IsA(best_path, GroupResultPath))
446 : {
447 137080 : plan = (Plan *) create_group_result_plan(root,
448 : (GroupResultPath *) best_path);
449 : }
450 : else
451 : {
452 : /* Simple RTE_RESULT base relation */
453 : Assert(IsA(best_path, Path));
454 3440 : plan = create_scan_plan(root, best_path, flags);
455 : }
456 396166 : break;
457 9895 : case T_ProjectSet:
458 9895 : plan = (Plan *) create_project_set_plan(root,
459 : (ProjectSetPath *) best_path);
460 9895 : break;
461 3063 : case T_Material:
462 3063 : plan = (Plan *) create_material_plan(root,
463 : (MaterialPath *) best_path,
464 : flags);
465 3063 : break;
466 1528 : case T_Memoize:
467 1528 : plan = (Plan *) create_memoize_plan(root,
468 : (MemoizePath *) best_path,
469 : flags);
470 1528 : break;
471 4430 : case T_Unique:
472 4430 : plan = (Plan *) create_unique_plan(root,
473 : (UniquePath *) best_path,
474 : flags);
475 4430 : break;
476 844 : case T_Gather:
477 844 : plan = (Plan *) create_gather_plan(root,
478 : (GatherPath *) best_path);
479 844 : break;
480 57315 : case T_Sort:
481 57315 : plan = (Plan *) create_sort_plan(root,
482 : (SortPath *) best_path,
483 : flags);
484 57315 : break;
485 710 : case T_IncrementalSort:
486 710 : plan = (Plan *) create_incrementalsort_plan(root,
487 : (IncrementalSortPath *) best_path,
488 : flags);
489 710 : break;
490 206 : case T_Group:
491 206 : plan = (Plan *) create_group_plan(root,
492 : (GroupPath *) best_path);
493 206 : break;
494 36317 : case T_Agg:
495 36317 : if (IsA(best_path, GroupingSetsPath))
496 827 : plan = create_groupingsets_plan(root,
497 : (GroupingSetsPath *) best_path);
498 : else
499 : {
500 : Assert(IsA(best_path, AggPath));
501 35490 : plan = (Plan *) create_agg_plan(root,
502 : (AggPath *) best_path);
503 : }
504 36317 : break;
505 2347 : case T_WindowAgg:
506 2347 : plan = (Plan *) create_windowagg_plan(root,
507 : (WindowAggPath *) best_path);
508 2347 : break;
509 599 : case T_SetOp:
510 599 : plan = (Plan *) create_setop_plan(root,
511 : (SetOpPath *) best_path,
512 : flags);
513 599 : break;
514 686 : case T_RecursiveUnion:
515 686 : plan = (Plan *) create_recursiveunion_plan(root,
516 : (RecursiveUnionPath *) best_path);
517 686 : break;
518 8497 : case T_LockRows:
519 8497 : plan = (Plan *) create_lockrows_plan(root,
520 : (LockRowsPath *) best_path,
521 : flags);
522 8497 : break;
523 62779 : case T_ModifyTable:
524 62779 : plan = (Plan *) create_modifytable_plan(root,
525 : (ModifyTablePath *) best_path);
526 62509 : break;
527 3263 : case T_Limit:
528 3263 : plan = (Plan *) create_limit_plan(root,
529 : (LimitPath *) best_path,
530 : flags);
531 3263 : break;
532 323 : case T_GatherMerge:
533 323 : plan = (Plan *) create_gather_merge_plan(root,
534 : (GatherMergePath *) best_path);
535 323 : break;
536 0 : default:
537 0 : elog(ERROR, "unrecognized node type: %d",
538 : (int) best_path->pathtype);
539 : plan = NULL; /* keep compiler quiet */
540 : break;
541 : }
542 :
543 1118677 : return plan;
544 : }
545 :
546 : /*
547 : * create_scan_plan
548 : * Create a scan plan for the parent relation of 'best_path'.
549 : */
550 : static Plan *
551 399559 : create_scan_plan(PlannerInfo *root, Path *best_path, int flags)
552 : {
553 399559 : RelOptInfo *rel = best_path->parent;
554 : List *scan_clauses;
555 : List *gating_clauses;
556 : List *tlist;
557 : Plan *plan;
558 :
559 : /*
560 : * Extract the relevant restriction clauses from the parent relation. The
561 : * executor must apply all these restrictions during the scan, except for
562 : * pseudoconstants which we'll take care of below.
563 : *
564 : * If this is a plain indexscan or index-only scan, we need not consider
565 : * restriction clauses that are implied by the index's predicate, so use
566 : * indrestrictinfo not baserestrictinfo. Note that we can't do that for
567 : * bitmap indexscans, since there's not necessarily a single index
568 : * involved; but it doesn't matter since create_bitmap_scan_plan() will be
569 : * able to get rid of such clauses anyway via predicate proof.
570 : */
571 399559 : switch (best_path->pathtype)
572 : {
573 114801 : case T_IndexScan:
574 : case T_IndexOnlyScan:
575 114801 : scan_clauses = castNode(IndexPath, best_path)->indexinfo->indrestrictinfo;
576 114801 : break;
577 284758 : default:
578 284758 : scan_clauses = rel->baserestrictinfo;
579 284758 : break;
580 : }
581 :
582 : /*
583 : * If this is a parameterized scan, we also need to enforce all the join
584 : * clauses available from the outer relation(s).
585 : *
586 : * For paranoia's sake, don't modify the stored baserestrictinfo list.
587 : */
588 399559 : if (best_path->param_info)
589 37542 : scan_clauses = list_concat_copy(scan_clauses,
590 37542 : best_path->param_info->ppi_clauses);
591 :
592 : /*
593 : * Detect whether we have any pseudoconstant quals to deal with. Then, if
594 : * we'll need a gating Result node, it will be able to project, so there
595 : * are no requirements on the child's tlist.
596 : *
597 : * If this replaces a join, it must be a foreign scan or a custom scan,
598 : * and the FDW or the custom scan provider would have stored in the best
599 : * path the list of RestrictInfo nodes to apply to the join; check against
600 : * that list in that case.
601 : */
602 399559 : if (IS_JOIN_REL(rel))
603 159 : {
604 : List *join_clauses;
605 :
606 : Assert(best_path->pathtype == T_ForeignScan ||
607 : best_path->pathtype == T_CustomScan);
608 159 : if (best_path->pathtype == T_ForeignScan)
609 159 : join_clauses = ((ForeignPath *) best_path)->fdw_restrictinfo;
610 : else
611 0 : join_clauses = ((CustomPath *) best_path)->custom_restrictinfo;
612 :
613 159 : gating_clauses = get_gating_quals(root, join_clauses);
614 : }
615 : else
616 399400 : gating_clauses = get_gating_quals(root, scan_clauses);
617 399559 : if (gating_clauses)
618 3265 : flags = 0;
619 :
620 : /*
621 : * For table scans, rather than using the relation targetlist (which is
622 : * only those Vars actually needed by the query), we prefer to generate a
623 : * tlist containing all Vars in order. This will allow the executor to
624 : * optimize away projection of the table tuples, if possible.
625 : *
626 : * But if the caller is going to ignore our tlist anyway, then don't
627 : * bother generating one at all. We use an exact equality test here, so
628 : * that this only applies when CP_IGNORE_TLIST is the only flag set.
629 : */
630 399559 : if (flags == CP_IGNORE_TLIST)
631 : {
632 62135 : tlist = NULL;
633 : }
634 337424 : else if (use_physical_tlist(root, best_path, flags))
635 : {
636 156481 : if (best_path->pathtype == T_IndexOnlyScan)
637 : {
638 : /* For index-only scan, the preferred tlist is the index's */
639 8306 : tlist = copyObject(((IndexPath *) best_path)->indexinfo->indextlist);
640 :
641 : /*
642 : * Transfer sortgroupref data to the replacement tlist, if
643 : * requested (use_physical_tlist checked that this will work).
644 : */
645 8306 : if (flags & CP_LABEL_TLIST)
646 1413 : apply_pathtarget_labeling_to_tlist(tlist, best_path->pathtarget);
647 : }
648 : else
649 : {
650 148175 : tlist = build_physical_tlist(root, rel);
651 148175 : if (tlist == NIL)
652 : {
653 : /* Failed because of dropped cols, so use regular method */
654 100 : tlist = build_path_tlist(root, best_path);
655 : }
656 : else
657 : {
658 : /* As above, transfer sortgroupref data to replacement tlist */
659 148075 : if (flags & CP_LABEL_TLIST)
660 12349 : apply_pathtarget_labeling_to_tlist(tlist, best_path->pathtarget);
661 : }
662 : }
663 : }
664 : else
665 : {
666 180943 : tlist = build_path_tlist(root, best_path);
667 : }
668 :
669 399559 : switch (best_path->pathtype)
670 : {
671 182617 : case T_SeqScan:
672 182617 : plan = (Plan *) create_seqscan_plan(root,
673 : best_path,
674 : tlist,
675 : scan_clauses);
676 182617 : break;
677 :
678 243 : case T_SampleScan:
679 243 : plan = (Plan *) create_samplescan_plan(root,
680 : best_path,
681 : tlist,
682 : scan_clauses);
683 243 : break;
684 :
685 101190 : case T_IndexScan:
686 101190 : plan = (Plan *) create_indexscan_plan(root,
687 : (IndexPath *) best_path,
688 : tlist,
689 : scan_clauses,
690 : false);
691 101190 : break;
692 :
693 13611 : case T_IndexOnlyScan:
694 13611 : plan = (Plan *) create_indexscan_plan(root,
695 : (IndexPath *) best_path,
696 : tlist,
697 : scan_clauses,
698 : true);
699 13611 : break;
700 :
701 18698 : case T_BitmapHeapScan:
702 18698 : plan = (Plan *) create_bitmap_scan_plan(root,
703 : (BitmapHeapPath *) best_path,
704 : tlist,
705 : scan_clauses);
706 18698 : break;
707 :
708 548 : case T_TidScan:
709 548 : plan = (Plan *) create_tidscan_plan(root,
710 : (TidPath *) best_path,
711 : tlist,
712 : scan_clauses);
713 548 : break;
714 :
715 1668 : case T_TidRangeScan:
716 1668 : plan = (Plan *) create_tidrangescan_plan(root,
717 : (TidRangePath *) best_path,
718 : tlist,
719 : scan_clauses);
720 1668 : break;
721 :
722 30197 : case T_SubqueryScan:
723 30197 : plan = (Plan *) create_subqueryscan_plan(root,
724 : (SubqueryScanPath *) best_path,
725 : tlist,
726 : scan_clauses);
727 30197 : break;
728 :
729 35104 : case T_FunctionScan:
730 35104 : plan = (Plan *) create_functionscan_plan(root,
731 : best_path,
732 : tlist,
733 : scan_clauses);
734 35104 : break;
735 :
736 519 : case T_TableFuncScan:
737 519 : plan = (Plan *) create_tablefuncscan_plan(root,
738 : best_path,
739 : tlist,
740 : scan_clauses);
741 519 : break;
742 :
743 6686 : case T_ValuesScan:
744 6686 : plan = (Plan *) create_valuesscan_plan(root,
745 : best_path,
746 : tlist,
747 : scan_clauses);
748 6686 : break;
749 :
750 2913 : case T_CteScan:
751 2913 : plan = (Plan *) create_ctescan_plan(root,
752 : best_path,
753 : tlist,
754 : scan_clauses);
755 2913 : break;
756 :
757 391 : case T_NamedTuplestoreScan:
758 391 : plan = (Plan *) create_namedtuplestorescan_plan(root,
759 : best_path,
760 : tlist,
761 : scan_clauses);
762 391 : break;
763 :
764 3440 : case T_Result:
765 3440 : plan = (Plan *) create_resultscan_plan(root,
766 : best_path,
767 : tlist,
768 : scan_clauses);
769 3440 : break;
770 :
771 686 : case T_WorkTableScan:
772 686 : plan = (Plan *) create_worktablescan_plan(root,
773 : best_path,
774 : tlist,
775 : scan_clauses);
776 686 : break;
777 :
778 1048 : case T_ForeignScan:
779 1048 : plan = (Plan *) create_foreignscan_plan(root,
780 : (ForeignPath *) best_path,
781 : tlist,
782 : scan_clauses);
783 1048 : break;
784 :
785 0 : case T_CustomScan:
786 0 : plan = (Plan *) create_customscan_plan(root,
787 : (CustomPath *) best_path,
788 : tlist,
789 : scan_clauses);
790 0 : break;
791 :
792 0 : default:
793 0 : elog(ERROR, "unrecognized node type: %d",
794 : (int) best_path->pathtype);
795 : plan = NULL; /* keep compiler quiet */
796 : break;
797 : }
798 :
799 : /*
800 : * If there are any pseudoconstant clauses attached to this node, insert a
801 : * gating Result node that evaluates the pseudoconstants as one-time
802 : * quals.
803 : */
804 399559 : if (gating_clauses)
805 3265 : plan = create_gating_plan(root, best_path, plan, gating_clauses);
806 :
807 399559 : return plan;
808 : }
809 :
810 : /*
811 : * Build a target list (ie, a list of TargetEntry) for the Path's output.
812 : *
813 : * This is almost just make_tlist_from_pathtarget(), but we also have to
814 : * deal with replacing nestloop params.
815 : */
816 : static List *
817 765895 : build_path_tlist(PlannerInfo *root, Path *path)
818 : {
819 765895 : List *tlist = NIL;
820 765895 : Index *sortgrouprefs = path->pathtarget->sortgrouprefs;
821 765895 : int resno = 1;
822 : ListCell *v;
823 :
824 2654060 : foreach(v, path->pathtarget->exprs)
825 : {
826 1888165 : Node *node = (Node *) lfirst(v);
827 : TargetEntry *tle;
828 :
829 : /*
830 : * If it's a parameterized path, there might be lateral references in
831 : * the tlist, which need to be replaced with Params. There's no need
832 : * to remake the TargetEntry nodes, so apply this to each list item
833 : * separately.
834 : */
835 1888165 : if (path->param_info)
836 18402 : node = replace_nestloop_params(root, node);
837 :
838 1888165 : tle = makeTargetEntry((Expr *) node,
839 : resno,
840 : NULL,
841 : false);
842 1888165 : if (sortgrouprefs)
843 1171723 : tle->ressortgroupref = sortgrouprefs[resno - 1];
844 :
845 1888165 : tlist = lappend(tlist, tle);
846 1888165 : resno++;
847 : }
848 765895 : return tlist;
849 : }
850 :
851 : /*
852 : * use_physical_tlist
853 : * Decide whether to use a tlist matching relation structure,
854 : * rather than only those Vars actually referenced.
855 : */
856 : static bool
857 592774 : use_physical_tlist(PlannerInfo *root, Path *path, int flags)
858 : {
859 592774 : RelOptInfo *rel = path->parent;
860 : int i;
861 : ListCell *lc;
862 :
863 : /*
864 : * Forget it if either exact tlist or small tlist is demanded.
865 : */
866 592774 : if (flags & (CP_EXACT_TLIST | CP_SMALL_TLIST))
867 398908 : return false;
868 :
869 : /*
870 : * We can do this for real relation scans, subquery scans, function scans,
871 : * tablefunc scans, values scans, and CTE scans (but not for, eg, joins).
872 : */
873 193866 : if (rel->rtekind != RTE_RELATION &&
874 32112 : rel->rtekind != RTE_SUBQUERY &&
875 26803 : rel->rtekind != RTE_FUNCTION &&
876 12084 : rel->rtekind != RTE_TABLEFUNC &&
877 11889 : rel->rtekind != RTE_VALUES &&
878 10791 : rel->rtekind != RTE_CTE)
879 9858 : return false;
880 :
881 : /*
882 : * Can't do it with inheritance cases either (mainly because Append
883 : * doesn't project; this test may be unnecessary now that
884 : * create_append_plan instructs its children to return an exact tlist).
885 : */
886 184008 : if (rel->reloptkind != RELOPT_BASEREL)
887 5094 : return false;
888 :
889 : /*
890 : * Also, don't do it to a CustomPath; the premise that we're extracting
891 : * columns from a simple physical tuple is unlikely to hold for those.
892 : * (When it does make sense, the custom path creator can set up the path's
893 : * pathtarget that way.)
894 : */
895 178914 : if (IsA(path, CustomPath))
896 0 : return false;
897 :
898 : /*
899 : * If a bitmap scan's tlist is empty, keep it as-is. This may allow the
900 : * executor to skip heap page fetches, and in any case, the benefit of
901 : * using a physical tlist instead would be minimal.
902 : */
903 178914 : if (IsA(path, BitmapHeapPath) &&
904 8653 : path->pathtarget->exprs == NIL)
905 2397 : return false;
906 :
907 : /*
908 : * Can't do it if any system columns or whole-row Vars are requested.
909 : * (This could possibly be fixed but would take some fragile assumptions
910 : * in setrefs.c, I think.)
911 : */
912 1213372 : for (i = rel->min_attr; i <= 0; i++)
913 : {
914 1054491 : if (!bms_is_empty(rel->attr_needed[i - rel->min_attr]))
915 17636 : return false;
916 : }
917 :
918 : /*
919 : * Can't do it if the rel is required to emit any placeholder expressions,
920 : * either.
921 : */
922 160255 : foreach(lc, root->placeholder_list)
923 : {
924 1711 : PlaceHolderInfo *phinfo = (PlaceHolderInfo *) lfirst(lc);
925 :
926 3362 : if (bms_nonempty_difference(phinfo->ph_needed, rel->relids) &&
927 1651 : bms_is_subset(phinfo->ph_eval_at, rel->relids))
928 337 : return false;
929 : }
930 :
931 : /*
932 : * For an index-only scan, the "physical tlist" is the index's indextlist.
933 : * We can only return that without a projection if all the index's columns
934 : * are returnable.
935 : */
936 158544 : if (path->pathtype == T_IndexOnlyScan)
937 : {
938 8318 : IndexOptInfo *indexinfo = ((IndexPath *) path)->indexinfo;
939 :
940 18040 : for (i = 0; i < indexinfo->ncolumns; i++)
941 : {
942 9734 : if (!indexinfo->canreturn[i])
943 12 : return false;
944 : }
945 : }
946 :
947 : /*
948 : * Also, can't do it if CP_LABEL_TLIST is specified and path is requested
949 : * to emit any sort/group columns that are not simple Vars. (If they are
950 : * simple Vars, they should appear in the physical tlist, and
951 : * apply_pathtarget_labeling_to_tlist will take care of getting them
952 : * labeled again.) We also have to check that no two sort/group columns
953 : * are the same Var, else that element of the physical tlist would need
954 : * conflicting ressortgroupref labels.
955 : */
956 158532 : if ((flags & CP_LABEL_TLIST) && path->pathtarget->sortgrouprefs)
957 : {
958 2151 : Bitmapset *sortgroupatts = NULL;
959 :
960 2151 : i = 0;
961 5216 : foreach(lc, path->pathtarget->exprs)
962 : {
963 3695 : Expr *expr = (Expr *) lfirst(lc);
964 :
965 3695 : if (path->pathtarget->sortgrouprefs[i])
966 : {
967 3029 : if (expr && IsA(expr, Var))
968 2399 : {
969 2409 : int attno = ((Var *) expr)->varattno;
970 :
971 2409 : attno -= FirstLowInvalidHeapAttributeNumber;
972 2409 : if (bms_is_member(attno, sortgroupatts))
973 630 : return false;
974 2399 : sortgroupatts = bms_add_member(sortgroupatts, attno);
975 : }
976 : else
977 620 : return false;
978 : }
979 3065 : i++;
980 : }
981 : }
982 :
983 157902 : return true;
984 : }
985 :
986 : /*
987 : * get_gating_quals
988 : * See if there are pseudoconstant quals in a node's quals list
989 : *
990 : * If the node's quals list includes any pseudoconstant quals,
991 : * return just those quals.
992 : */
993 : static List *
994 512713 : get_gating_quals(PlannerInfo *root, List *quals)
995 : {
996 : /* No need to look if we know there are no pseudoconstants */
997 512713 : if (!root->hasPseudoConstantQuals)
998 488372 : return NIL;
999 :
1000 : /* Sort into desirable execution order while still in RestrictInfo form */
1001 24341 : quals = order_qual_clauses(root, quals);
1002 :
1003 : /* Pull out any pseudoconstant quals from the RestrictInfo list */
1004 24341 : return extract_actual_clauses(quals, true);
1005 : }
1006 :
1007 : /*
1008 : * create_gating_plan
1009 : * Deal with pseudoconstant qual clauses
1010 : *
1011 : * Add a gating Result node atop the already-built plan.
1012 : */
1013 : static Plan *
1014 8470 : create_gating_plan(PlannerInfo *root, Path *path, Plan *plan,
1015 : List *gating_quals)
1016 : {
1017 : Result *gplan;
1018 :
1019 : Assert(gating_quals);
1020 :
1021 : /*
1022 : * Since we need a Result node anyway, always return the path's requested
1023 : * tlist; that's never a wrong choice, even if the parent node didn't ask
1024 : * for CP_EXACT_TLIST.
1025 : */
1026 8470 : gplan = make_gating_result(build_path_tlist(root, path),
1027 : (Node *) gating_quals, plan);
1028 :
1029 : /*
1030 : * We might have had a trivial Result plan already. Stacking one Result
1031 : * atop another is silly, so if that applies, just discard the input plan.
1032 : * (We're assuming its targetlist is uninteresting; it should be either
1033 : * the same as the result of build_path_tlist, or a simplified version.
1034 : * However, we preserve the set of relids that it purports to scan and
1035 : * attribute that to our replacement Result instead, and likewise for the
1036 : * result_type.)
1037 : */
1038 8470 : if (IsA(plan, Result))
1039 : {
1040 20 : Result *rplan = (Result *) plan;
1041 :
1042 20 : gplan->plan.lefttree = NULL;
1043 20 : gplan->relids = rplan->relids;
1044 20 : gplan->result_type = rplan->result_type;
1045 : }
1046 :
1047 : /*
1048 : * Notice that we don't change cost or size estimates when doing gating.
1049 : * The costs of qual eval were already included in the subplan's cost.
1050 : * Leaving the size alone amounts to assuming that the gating qual will
1051 : * succeed, which is the conservative estimate for planning upper queries.
1052 : * We certainly don't want to assume the output size is zero (unless the
1053 : * gating qual is actually constant FALSE, and that case is dealt with in
1054 : * clausesel.c). Interpolating between the two cases is silly, because it
1055 : * doesn't reflect what will really happen at runtime, and besides which
1056 : * in most cases we have only a very bad idea of the probability of the
1057 : * gating qual being true.
1058 : */
1059 8470 : copy_plan_costsize(&gplan->plan, plan);
1060 :
1061 : /* Gating quals could be unsafe, so better use the Path's safety flag */
1062 8470 : gplan->plan.parallel_safe = path->parallel_safe;
1063 :
1064 8470 : return &gplan->plan;
1065 : }
1066 :
1067 : /*
1068 : * create_join_plan
1069 : * Create a join plan for 'best_path' and (recursively) plans for its
1070 : * inner and outer paths.
1071 : */
1072 : static Plan *
1073 113154 : create_join_plan(PlannerInfo *root, JoinPath *best_path)
1074 : {
1075 : Plan *plan;
1076 : List *gating_clauses;
1077 :
1078 113154 : switch (best_path->path.pathtype)
1079 : {
1080 5523 : case T_MergeJoin:
1081 5523 : plan = (Plan *) create_mergejoin_plan(root,
1082 : (MergePath *) best_path);
1083 5523 : break;
1084 30901 : case T_HashJoin:
1085 30901 : plan = (Plan *) create_hashjoin_plan(root,
1086 : (HashPath *) best_path);
1087 30901 : break;
1088 76730 : case T_NestLoop:
1089 76730 : plan = (Plan *) create_nestloop_plan(root,
1090 : (NestPath *) best_path);
1091 76730 : break;
1092 0 : default:
1093 0 : elog(ERROR, "unrecognized node type: %d",
1094 : (int) best_path->path.pathtype);
1095 : plan = NULL; /* keep compiler quiet */
1096 : break;
1097 : }
1098 :
1099 : /*
1100 : * If there are any pseudoconstant clauses attached to this node, insert a
1101 : * gating Result node that evaluates the pseudoconstants as one-time
1102 : * quals.
1103 : */
1104 113154 : gating_clauses = get_gating_quals(root, best_path->joinrestrictinfo);
1105 113154 : if (gating_clauses)
1106 5205 : plan = create_gating_plan(root, (Path *) best_path, plan,
1107 : gating_clauses);
1108 :
1109 : #ifdef NOT_USED
1110 :
1111 : /*
1112 : * * Expensive function pullups may have pulled local predicates * into
1113 : * this path node. Put them in the qpqual of the plan node. * JMH,
1114 : * 6/15/92
1115 : */
1116 : if (get_loc_restrictinfo(best_path) != NIL)
1117 : set_qpqual((Plan) plan,
1118 : list_concat(get_qpqual((Plan) plan),
1119 : get_actual_clauses(get_loc_restrictinfo(best_path))));
1120 : #endif
1121 :
1122 113154 : return plan;
1123 : }
1124 :
1125 : /*
1126 : * mark_async_capable_plan
1127 : * Check whether the Plan node created from a Path node is async-capable,
1128 : * and if so, mark the Plan node as such and return true, otherwise
1129 : * return false.
1130 : */
1131 : static bool
1132 24532 : mark_async_capable_plan(Plan *plan, Path *path)
1133 : {
1134 24532 : switch (nodeTag(path))
1135 : {
1136 8976 : case T_SubqueryScanPath:
1137 : {
1138 8976 : SubqueryScan *scan_plan = (SubqueryScan *) plan;
1139 :
1140 : /*
1141 : * If the generated plan node includes a gating Result node,
1142 : * we can't execute it asynchronously.
1143 : */
1144 8976 : if (IsA(plan, Result))
1145 2 : return false;
1146 :
1147 : /*
1148 : * If a SubqueryScan node atop of an async-capable plan node
1149 : * is deletable, consider it as async-capable.
1150 : */
1151 12430 : if (trivial_subqueryscan(scan_plan) &&
1152 3456 : mark_async_capable_plan(scan_plan->subplan,
1153 : ((SubqueryScanPath *) path)->subpath))
1154 8 : break;
1155 8966 : return false;
1156 : }
1157 244 : case T_ForeignPath:
1158 : {
1159 244 : FdwRoutine *fdwroutine = path->parent->fdwroutine;
1160 :
1161 : /*
1162 : * If the generated plan node includes a gating Result node,
1163 : * we can't execute it asynchronously.
1164 : */
1165 244 : if (IsA(plan, Result))
1166 4 : return false;
1167 :
1168 : Assert(fdwroutine != NULL);
1169 477 : if (fdwroutine->IsForeignPathAsyncCapable != NULL &&
1170 237 : fdwroutine->IsForeignPathAsyncCapable((ForeignPath *) path))
1171 97 : break;
1172 143 : return false;
1173 : }
1174 4346 : case T_ProjectionPath:
1175 :
1176 : /*
1177 : * If the generated plan node includes a Result node for the
1178 : * projection, we can't execute it asynchronously.
1179 : */
1180 4346 : if (IsA(plan, Result))
1181 113 : return false;
1182 :
1183 : /*
1184 : * create_projection_plan() would have pulled up the subplan, so
1185 : * check the capability using the subpath.
1186 : */
1187 4233 : if (mark_async_capable_plan(plan,
1188 : ((ProjectionPath *) path)->subpath))
1189 16 : return true;
1190 4217 : return false;
1191 10966 : default:
1192 10966 : return false;
1193 : }
1194 :
1195 105 : plan->async_capable = true;
1196 :
1197 105 : return true;
1198 : }
1199 :
1200 : /*
1201 : * create_append_plan
1202 : * Create an Append plan for 'best_path' and (recursively) plans
1203 : * for its subpaths.
1204 : *
1205 : * Returns a Plan node.
1206 : */
1207 : static Plan *
1208 20235 : create_append_plan(PlannerInfo *root, AppendPath *best_path, int flags)
1209 : {
1210 : Append *plan;
1211 20235 : List *tlist = build_path_tlist(root, &best_path->path);
1212 20235 : int orig_tlist_length = list_length(tlist);
1213 20235 : bool tlist_was_changed = false;
1214 20235 : List *pathkeys = best_path->path.pathkeys;
1215 20235 : List *subplans = NIL;
1216 : ListCell *subpaths;
1217 20235 : int nasyncplans = 0;
1218 20235 : RelOptInfo *rel = best_path->path.parent;
1219 20235 : int nodenumsortkeys = 0;
1220 20235 : AttrNumber *nodeSortColIdx = NULL;
1221 20235 : Oid *nodeSortOperators = NULL;
1222 20235 : Oid *nodeCollations = NULL;
1223 20235 : bool *nodeNullsFirst = NULL;
1224 20235 : bool consider_async = false;
1225 :
1226 : /*
1227 : * The subpaths list could be empty, if every child was proven empty by
1228 : * constraint exclusion. In that case generate a dummy plan that returns
1229 : * no rows.
1230 : *
1231 : * Note that an AppendPath with no members is also generated in certain
1232 : * cases where there was no appending construct at all, but we know the
1233 : * relation is empty (see set_dummy_rel_pathlist and mark_dummy_rel).
1234 : */
1235 20235 : if (best_path->subpaths == NIL)
1236 : {
1237 : /* Generate a Result plan with constant-FALSE gating qual */
1238 : Plan *plan;
1239 :
1240 955 : plan = (Plan *) make_one_row_result(tlist,
1241 955 : (Node *) list_make1(makeBoolConst(false,
1242 : false)),
1243 : best_path->path.parent);
1244 :
1245 955 : copy_generic_path_info(plan, (Path *) best_path);
1246 :
1247 955 : return plan;
1248 : }
1249 :
1250 : /*
1251 : * Otherwise build an Append plan. Note that if there's just one child,
1252 : * the Append is pretty useless; but we wait till setrefs.c to get rid of
1253 : * it. Doing so here doesn't work because the varno of the child scan
1254 : * plan won't match the parent-rel Vars it'll be asked to emit.
1255 : *
1256 : * We don't have the actual creation of the Append node split out into a
1257 : * separate make_xxx function. This is because we want to run
1258 : * prepare_sort_from_pathkeys on it before we do so on the individual
1259 : * child plans, to make cross-checking the sort info easier.
1260 : */
1261 19280 : plan = makeNode(Append);
1262 19280 : plan->plan.targetlist = tlist;
1263 19280 : plan->plan.qual = NIL;
1264 19280 : plan->plan.lefttree = NULL;
1265 19280 : plan->plan.righttree = NULL;
1266 19280 : plan->apprelids = rel->relids;
1267 19280 : plan->child_append_relid_sets = best_path->child_append_relid_sets;
1268 :
1269 19280 : if (pathkeys != NIL)
1270 : {
1271 : /*
1272 : * Compute sort column info, and adjust the Append's tlist as needed.
1273 : * Because we pass adjust_tlist_in_place = true, we may ignore the
1274 : * function result; it must be the same plan node. However, we then
1275 : * need to detect whether any tlist entries were added.
1276 : */
1277 260 : (void) prepare_sort_from_pathkeys((Plan *) plan, pathkeys,
1278 260 : best_path->path.parent->relids,
1279 : NULL,
1280 : true,
1281 : &nodenumsortkeys,
1282 : &nodeSortColIdx,
1283 : &nodeSortOperators,
1284 : &nodeCollations,
1285 : &nodeNullsFirst);
1286 260 : tlist_was_changed = (orig_tlist_length != list_length(plan->plan.targetlist));
1287 : }
1288 :
1289 : /* If appropriate, consider async append */
1290 19280 : consider_async = (enable_async_append && pathkeys == NIL &&
1291 46871 : !best_path->path.parallel_safe &&
1292 8311 : list_length(best_path->subpaths) > 1);
1293 :
1294 : /* Build the plan for each child */
1295 68241 : foreach(subpaths, best_path->subpaths)
1296 : {
1297 48961 : Path *subpath = (Path *) lfirst(subpaths);
1298 : Plan *subplan;
1299 :
1300 : /* Must insist that all children return the same tlist */
1301 48961 : subplan = create_plan_recurse(root, subpath, CP_EXACT_TLIST);
1302 :
1303 : /*
1304 : * For ordered Appends, we must insert a Sort node if subplan isn't
1305 : * sufficiently ordered.
1306 : */
1307 48961 : if (pathkeys != NIL)
1308 : {
1309 : int numsortkeys;
1310 : AttrNumber *sortColIdx;
1311 : Oid *sortOperators;
1312 : Oid *collations;
1313 : bool *nullsFirst;
1314 : int presorted_keys;
1315 :
1316 : /*
1317 : * Compute sort column info, and adjust subplan's tlist as needed.
1318 : * We must apply prepare_sort_from_pathkeys even to subplans that
1319 : * don't need an explicit sort, to make sure they are returning
1320 : * the same sort key columns the Append expects.
1321 : */
1322 671 : subplan = prepare_sort_from_pathkeys(subplan, pathkeys,
1323 671 : subpath->parent->relids,
1324 : nodeSortColIdx,
1325 : false,
1326 : &numsortkeys,
1327 : &sortColIdx,
1328 : &sortOperators,
1329 : &collations,
1330 : &nullsFirst);
1331 :
1332 : /*
1333 : * Check that we got the same sort key information. We just
1334 : * Assert that the sortops match, since those depend only on the
1335 : * pathkeys; but it seems like a good idea to check the sort
1336 : * column numbers explicitly, to ensure the tlists match up.
1337 : */
1338 : Assert(numsortkeys == nodenumsortkeys);
1339 671 : if (memcmp(sortColIdx, nodeSortColIdx,
1340 : numsortkeys * sizeof(AttrNumber)) != 0)
1341 0 : elog(ERROR, "Append child's targetlist doesn't match Append");
1342 : Assert(memcmp(sortOperators, nodeSortOperators,
1343 : numsortkeys * sizeof(Oid)) == 0);
1344 : Assert(memcmp(collations, nodeCollations,
1345 : numsortkeys * sizeof(Oid)) == 0);
1346 : Assert(memcmp(nullsFirst, nodeNullsFirst,
1347 : numsortkeys * sizeof(bool)) == 0);
1348 :
1349 : /* Now, insert a Sort node if subplan isn't sufficiently ordered */
1350 671 : if (!pathkeys_count_contained_in(pathkeys, subpath->pathkeys,
1351 : &presorted_keys))
1352 : {
1353 : Plan *sort_plan;
1354 :
1355 : /*
1356 : * We choose to use incremental sort if it is enabled and
1357 : * there are presorted keys; otherwise we use full sort.
1358 : */
1359 10 : if (enable_incremental_sort && presorted_keys > 0)
1360 : {
1361 : sort_plan = (Plan *)
1362 5 : make_incrementalsort(subplan, numsortkeys, presorted_keys,
1363 : sortColIdx, sortOperators,
1364 : collations, nullsFirst);
1365 :
1366 5 : label_incrementalsort_with_costsize(root,
1367 : (IncrementalSort *) sort_plan,
1368 : pathkeys,
1369 : best_path->limit_tuples);
1370 : }
1371 : else
1372 : {
1373 5 : sort_plan = (Plan *) make_sort(subplan, numsortkeys,
1374 : sortColIdx, sortOperators,
1375 : collations, nullsFirst);
1376 :
1377 5 : label_sort_with_costsize(root, (Sort *) sort_plan,
1378 : best_path->limit_tuples);
1379 : }
1380 :
1381 10 : subplan = sort_plan;
1382 : }
1383 : }
1384 :
1385 : /* If needed, check to see if subplan can be executed asynchronously */
1386 48961 : if (consider_async && mark_async_capable_plan(subplan, subpath))
1387 : {
1388 : Assert(subplan->async_capable);
1389 97 : ++nasyncplans;
1390 : }
1391 :
1392 48961 : subplans = lappend(subplans, subplan);
1393 : }
1394 :
1395 : /* Set below if we find quals that we can use to run-time prune */
1396 19280 : plan->part_prune_index = -1;
1397 :
1398 : /*
1399 : * If any quals exist, they may be useful to perform further partition
1400 : * pruning during execution. Gather information needed by the executor to
1401 : * do partition pruning.
1402 : */
1403 19280 : if (enable_partition_pruning)
1404 : {
1405 : List *prunequal;
1406 :
1407 19235 : prunequal = extract_actual_clauses(rel->baserestrictinfo, false);
1408 :
1409 19235 : if (best_path->path.param_info)
1410 : {
1411 301 : List *prmquals = best_path->path.param_info->ppi_clauses;
1412 :
1413 301 : prmquals = extract_actual_clauses(prmquals, false);
1414 301 : prmquals = (List *) replace_nestloop_params(root,
1415 : (Node *) prmquals);
1416 :
1417 301 : prunequal = list_concat(prunequal, prmquals);
1418 : }
1419 :
1420 19235 : if (prunequal != NIL)
1421 6850 : plan->part_prune_index = make_partition_pruneinfo(root, rel,
1422 : best_path->subpaths,
1423 : prunequal);
1424 : }
1425 :
1426 19280 : plan->appendplans = subplans;
1427 19280 : plan->nasyncplans = nasyncplans;
1428 19280 : plan->first_partial_plan = best_path->first_partial_path;
1429 :
1430 19280 : copy_generic_path_info(&plan->plan, (Path *) best_path);
1431 :
1432 : /*
1433 : * If prepare_sort_from_pathkeys added sort columns, but we were told to
1434 : * produce either the exact tlist or a narrow tlist, we should get rid of
1435 : * the sort columns again. We must inject a projection node to do so.
1436 : */
1437 19280 : if (tlist_was_changed && (flags & (CP_EXACT_TLIST | CP_SMALL_TLIST)))
1438 : {
1439 0 : tlist = list_copy_head(plan->plan.targetlist, orig_tlist_length);
1440 0 : return inject_projection_plan((Plan *) plan, tlist,
1441 0 : plan->plan.parallel_safe);
1442 : }
1443 : else
1444 19280 : return (Plan *) plan;
1445 : }
1446 :
1447 : /*
1448 : * create_merge_append_plan
1449 : * Create a MergeAppend plan for 'best_path' and (recursively) plans
1450 : * for its subpaths.
1451 : *
1452 : * Returns a Plan node.
1453 : */
1454 : static Plan *
1455 471 : create_merge_append_plan(PlannerInfo *root, MergeAppendPath *best_path,
1456 : int flags)
1457 : {
1458 471 : MergeAppend *node = makeNode(MergeAppend);
1459 471 : Plan *plan = &node->plan;
1460 471 : List *tlist = build_path_tlist(root, &best_path->path);
1461 471 : int orig_tlist_length = list_length(tlist);
1462 : bool tlist_was_changed;
1463 471 : List *pathkeys = best_path->path.pathkeys;
1464 471 : List *subplans = NIL;
1465 : ListCell *subpaths;
1466 471 : RelOptInfo *rel = best_path->path.parent;
1467 :
1468 : /*
1469 : * We don't have the actual creation of the MergeAppend node split out
1470 : * into a separate make_xxx function. This is because we want to run
1471 : * prepare_sort_from_pathkeys on it before we do so on the individual
1472 : * child plans, to make cross-checking the sort info easier.
1473 : */
1474 471 : copy_generic_path_info(plan, (Path *) best_path);
1475 471 : plan->targetlist = tlist;
1476 471 : plan->qual = NIL;
1477 471 : plan->lefttree = NULL;
1478 471 : plan->righttree = NULL;
1479 471 : node->apprelids = rel->relids;
1480 471 : node->child_append_relid_sets = best_path->child_append_relid_sets;
1481 :
1482 : /*
1483 : * Compute sort column info, and adjust MergeAppend's tlist as needed.
1484 : * Because we pass adjust_tlist_in_place = true, we may ignore the
1485 : * function result; it must be the same plan node. However, we then need
1486 : * to detect whether any tlist entries were added.
1487 : */
1488 471 : (void) prepare_sort_from_pathkeys(plan, pathkeys,
1489 471 : best_path->path.parent->relids,
1490 : NULL,
1491 : true,
1492 : &node->numCols,
1493 : &node->sortColIdx,
1494 : &node->sortOperators,
1495 : &node->collations,
1496 : &node->nullsFirst);
1497 471 : tlist_was_changed = (orig_tlist_length != list_length(plan->targetlist));
1498 :
1499 : /*
1500 : * Now prepare the child plans. We must apply prepare_sort_from_pathkeys
1501 : * even to subplans that don't need an explicit sort, to make sure they
1502 : * are returning the same sort key columns the MergeAppend expects.
1503 : */
1504 1798 : foreach(subpaths, best_path->subpaths)
1505 : {
1506 1327 : Path *subpath = (Path *) lfirst(subpaths);
1507 : Plan *subplan;
1508 : int numsortkeys;
1509 : AttrNumber *sortColIdx;
1510 : Oid *sortOperators;
1511 : Oid *collations;
1512 : bool *nullsFirst;
1513 : int presorted_keys;
1514 :
1515 : /* Build the child plan */
1516 : /* Must insist that all children return the same tlist */
1517 1327 : subplan = create_plan_recurse(root, subpath, CP_EXACT_TLIST);
1518 :
1519 : /* Compute sort column info, and adjust subplan's tlist as needed */
1520 1327 : subplan = prepare_sort_from_pathkeys(subplan, pathkeys,
1521 1327 : subpath->parent->relids,
1522 1327 : node->sortColIdx,
1523 : false,
1524 : &numsortkeys,
1525 : &sortColIdx,
1526 : &sortOperators,
1527 : &collations,
1528 : &nullsFirst);
1529 :
1530 : /*
1531 : * Check that we got the same sort key information. We just Assert
1532 : * that the sortops match, since those depend only on the pathkeys;
1533 : * but it seems like a good idea to check the sort column numbers
1534 : * explicitly, to ensure the tlists really do match up.
1535 : */
1536 : Assert(numsortkeys == node->numCols);
1537 1327 : if (memcmp(sortColIdx, node->sortColIdx,
1538 : numsortkeys * sizeof(AttrNumber)) != 0)
1539 0 : elog(ERROR, "MergeAppend child's targetlist doesn't match MergeAppend");
1540 : Assert(memcmp(sortOperators, node->sortOperators,
1541 : numsortkeys * sizeof(Oid)) == 0);
1542 : Assert(memcmp(collations, node->collations,
1543 : numsortkeys * sizeof(Oid)) == 0);
1544 : Assert(memcmp(nullsFirst, node->nullsFirst,
1545 : numsortkeys * sizeof(bool)) == 0);
1546 :
1547 : /* Now, insert a Sort node if subplan isn't sufficiently ordered */
1548 1327 : if (!pathkeys_count_contained_in(pathkeys, subpath->pathkeys,
1549 : &presorted_keys))
1550 : {
1551 : Plan *sort_plan;
1552 :
1553 : /*
1554 : * We choose to use incremental sort if it is enabled and there
1555 : * are presorted keys; otherwise we use full sort.
1556 : */
1557 70 : if (enable_incremental_sort && presorted_keys > 0)
1558 : {
1559 : sort_plan = (Plan *)
1560 15 : make_incrementalsort(subplan, numsortkeys, presorted_keys,
1561 : sortColIdx, sortOperators,
1562 : collations, nullsFirst);
1563 :
1564 15 : label_incrementalsort_with_costsize(root,
1565 : (IncrementalSort *) sort_plan,
1566 : pathkeys,
1567 : best_path->limit_tuples);
1568 : }
1569 : else
1570 : {
1571 55 : sort_plan = (Plan *) make_sort(subplan, numsortkeys,
1572 : sortColIdx, sortOperators,
1573 : collations, nullsFirst);
1574 :
1575 55 : label_sort_with_costsize(root, (Sort *) sort_plan,
1576 : best_path->limit_tuples);
1577 : }
1578 :
1579 70 : subplan = sort_plan;
1580 : }
1581 :
1582 1327 : subplans = lappend(subplans, subplan);
1583 : }
1584 :
1585 : /* Set below if we find quals that we can use to run-time prune */
1586 471 : node->part_prune_index = -1;
1587 :
1588 : /*
1589 : * If any quals exist, they may be useful to perform further partition
1590 : * pruning during execution. Gather information needed by the executor to
1591 : * do partition pruning.
1592 : */
1593 471 : if (enable_partition_pruning)
1594 : {
1595 : List *prunequal;
1596 :
1597 471 : prunequal = extract_actual_clauses(rel->baserestrictinfo, false);
1598 :
1599 : /* We don't currently generate any parameterized MergeAppend paths */
1600 : Assert(best_path->path.param_info == NULL);
1601 :
1602 471 : if (prunequal != NIL)
1603 140 : node->part_prune_index = make_partition_pruneinfo(root, rel,
1604 : best_path->subpaths,
1605 : prunequal);
1606 : }
1607 :
1608 471 : node->mergeplans = subplans;
1609 :
1610 : /*
1611 : * If prepare_sort_from_pathkeys added sort columns, but we were told to
1612 : * produce either the exact tlist or a narrow tlist, we should get rid of
1613 : * the sort columns again. We must inject a projection node to do so.
1614 : */
1615 471 : if (tlist_was_changed && (flags & (CP_EXACT_TLIST | CP_SMALL_TLIST)))
1616 : {
1617 0 : tlist = list_copy_head(plan->targetlist, orig_tlist_length);
1618 0 : return inject_projection_plan(plan, tlist, plan->parallel_safe);
1619 : }
1620 : else
1621 471 : return plan;
1622 : }
1623 :
1624 : /*
1625 : * create_group_result_plan
1626 : * Create a Result plan for 'best_path'.
1627 : * This is only used for degenerate grouping cases.
1628 : *
1629 : * Returns a Plan node.
1630 : */
1631 : static Result *
1632 137080 : create_group_result_plan(PlannerInfo *root, GroupResultPath *best_path)
1633 : {
1634 : Result *plan;
1635 : List *tlist;
1636 : List *quals;
1637 :
1638 137080 : tlist = build_path_tlist(root, &best_path->path);
1639 :
1640 : /* best_path->quals is just bare clauses */
1641 137080 : quals = order_qual_clauses(root, best_path->quals);
1642 :
1643 137080 : plan = make_one_row_result(tlist, (Node *) quals, best_path->path.parent);
1644 :
1645 137080 : copy_generic_path_info(&plan->plan, (Path *) best_path);
1646 :
1647 137080 : return plan;
1648 : }
1649 :
1650 : /*
1651 : * create_project_set_plan
1652 : * Create a ProjectSet plan for 'best_path'.
1653 : *
1654 : * Returns a Plan node.
1655 : */
1656 : static ProjectSet *
1657 9895 : create_project_set_plan(PlannerInfo *root, ProjectSetPath *best_path)
1658 : {
1659 : ProjectSet *plan;
1660 : Plan *subplan;
1661 : List *tlist;
1662 :
1663 : /* Since we intend to project, we don't need to constrain child tlist */
1664 9895 : subplan = create_plan_recurse(root, best_path->subpath, 0);
1665 :
1666 9895 : tlist = build_path_tlist(root, &best_path->path);
1667 :
1668 9895 : plan = make_project_set(tlist, subplan);
1669 :
1670 9895 : copy_generic_path_info(&plan->plan, (Path *) best_path);
1671 :
1672 9895 : return plan;
1673 : }
1674 :
1675 : /*
1676 : * create_material_plan
1677 : * Create a Material plan for 'best_path' and (recursively) plans
1678 : * for its subpaths.
1679 : *
1680 : * Returns a Plan node.
1681 : */
1682 : static Material *
1683 3063 : create_material_plan(PlannerInfo *root, MaterialPath *best_path, int flags)
1684 : {
1685 : Material *plan;
1686 : Plan *subplan;
1687 :
1688 : /*
1689 : * We don't want any excess columns in the materialized tuples, so request
1690 : * a smaller tlist. Otherwise, since Material doesn't project, tlist
1691 : * requirements pass through.
1692 : */
1693 3063 : subplan = create_plan_recurse(root, best_path->subpath,
1694 : flags | CP_SMALL_TLIST);
1695 :
1696 3063 : plan = make_material(subplan);
1697 :
1698 3063 : copy_generic_path_info(&plan->plan, (Path *) best_path);
1699 :
1700 3063 : return plan;
1701 : }
1702 :
1703 : /*
1704 : * create_memoize_plan
1705 : * Create a Memoize plan for 'best_path' and (recursively) plans for its
1706 : * subpaths.
1707 : *
1708 : * Returns a Plan node.
1709 : */
1710 : static Memoize *
1711 1528 : create_memoize_plan(PlannerInfo *root, MemoizePath *best_path, int flags)
1712 : {
1713 : Memoize *plan;
1714 : Bitmapset *keyparamids;
1715 : Plan *subplan;
1716 : Oid *operators;
1717 : Oid *collations;
1718 1528 : List *param_exprs = NIL;
1719 : ListCell *lc;
1720 : ListCell *lc2;
1721 : int nkeys;
1722 : int i;
1723 :
1724 1528 : subplan = create_plan_recurse(root, best_path->subpath,
1725 : flags | CP_SMALL_TLIST);
1726 :
1727 1528 : param_exprs = (List *) replace_nestloop_params(root, (Node *)
1728 1528 : best_path->param_exprs);
1729 :
1730 1528 : nkeys = list_length(param_exprs);
1731 : Assert(nkeys > 0);
1732 1528 : operators = palloc(nkeys * sizeof(Oid));
1733 1528 : collations = palloc(nkeys * sizeof(Oid));
1734 :
1735 1528 : i = 0;
1736 3109 : forboth(lc, param_exprs, lc2, best_path->hash_operators)
1737 : {
1738 1581 : Expr *param_expr = (Expr *) lfirst(lc);
1739 1581 : Oid opno = lfirst_oid(lc2);
1740 :
1741 1581 : operators[i] = opno;
1742 1581 : collations[i] = exprCollation((Node *) param_expr);
1743 1581 : i++;
1744 : }
1745 :
1746 1528 : keyparamids = pull_paramids((Expr *) param_exprs);
1747 :
1748 1528 : plan = make_memoize(subplan, operators, collations, param_exprs,
1749 1528 : best_path->singlerow, best_path->binary_mode,
1750 : best_path->est_entries, keyparamids, best_path->est_calls,
1751 : best_path->est_unique_keys, best_path->est_hit_ratio);
1752 :
1753 1528 : copy_generic_path_info(&plan->plan, (Path *) best_path);
1754 :
1755 1528 : return plan;
1756 : }
1757 :
1758 : /*
1759 : * create_gather_plan
1760 : *
1761 : * Create a Gather plan for 'best_path' and (recursively) plans
1762 : * for its subpaths.
1763 : */
1764 : static Gather *
1765 844 : create_gather_plan(PlannerInfo *root, GatherPath *best_path)
1766 : {
1767 : Gather *gather_plan;
1768 : Plan *subplan;
1769 : List *tlist;
1770 :
1771 : /*
1772 : * Push projection down to the child node. That way, the projection work
1773 : * is parallelized, and there can be no system columns in the result (they
1774 : * can't travel through a tuple queue because it uses MinimalTuple
1775 : * representation).
1776 : */
1777 844 : subplan = create_plan_recurse(root, best_path->subpath, CP_EXACT_TLIST);
1778 :
1779 844 : tlist = build_path_tlist(root, &best_path->path);
1780 :
1781 844 : gather_plan = make_gather(tlist,
1782 : NIL,
1783 : best_path->num_workers,
1784 : assign_special_exec_param(root),
1785 844 : best_path->single_copy,
1786 : subplan);
1787 :
1788 844 : copy_generic_path_info(&gather_plan->plan, &best_path->path);
1789 :
1790 : /* use parallel mode for parallel plans. */
1791 844 : root->glob->parallelModeNeeded = true;
1792 :
1793 844 : return gather_plan;
1794 : }
1795 :
1796 : /*
1797 : * create_gather_merge_plan
1798 : *
1799 : * Create a Gather Merge plan for 'best_path' and (recursively)
1800 : * plans for its subpaths.
1801 : */
1802 : static GatherMerge *
1803 323 : create_gather_merge_plan(PlannerInfo *root, GatherMergePath *best_path)
1804 : {
1805 : GatherMerge *gm_plan;
1806 : Plan *subplan;
1807 323 : List *pathkeys = best_path->path.pathkeys;
1808 323 : List *tlist = build_path_tlist(root, &best_path->path);
1809 :
1810 : /* As with Gather, project away columns in the workers. */
1811 323 : subplan = create_plan_recurse(root, best_path->subpath, CP_EXACT_TLIST);
1812 :
1813 : /* Create a shell for a GatherMerge plan. */
1814 323 : gm_plan = makeNode(GatherMerge);
1815 323 : gm_plan->plan.targetlist = tlist;
1816 323 : gm_plan->num_workers = best_path->num_workers;
1817 323 : copy_generic_path_info(&gm_plan->plan, &best_path->path);
1818 :
1819 : /* Assign the rescan Param. */
1820 323 : gm_plan->rescan_param = assign_special_exec_param(root);
1821 :
1822 : /* Gather Merge is pointless with no pathkeys; use Gather instead. */
1823 : Assert(pathkeys != NIL);
1824 :
1825 : /* Compute sort column info, and adjust subplan's tlist as needed */
1826 323 : subplan = prepare_sort_from_pathkeys(subplan, pathkeys,
1827 323 : best_path->subpath->parent->relids,
1828 323 : gm_plan->sortColIdx,
1829 : false,
1830 : &gm_plan->numCols,
1831 : &gm_plan->sortColIdx,
1832 : &gm_plan->sortOperators,
1833 : &gm_plan->collations,
1834 : &gm_plan->nullsFirst);
1835 :
1836 : /*
1837 : * All gather merge paths should have already guaranteed the necessary
1838 : * sort order. See create_gather_merge_path.
1839 : */
1840 : Assert(pathkeys_contained_in(pathkeys, best_path->subpath->pathkeys));
1841 :
1842 : /* Now insert the subplan under GatherMerge. */
1843 323 : gm_plan->plan.lefttree = subplan;
1844 :
1845 : /* use parallel mode for parallel plans. */
1846 323 : root->glob->parallelModeNeeded = true;
1847 :
1848 323 : return gm_plan;
1849 : }
1850 :
1851 : /*
1852 : * create_projection_plan
1853 : *
1854 : * Create a plan tree to do a projection step and (recursively) plans
1855 : * for its subpaths. We may need a Result node for the projection,
1856 : * but sometimes we can just let the subplan do the work.
1857 : */
1858 : static Plan *
1859 255350 : create_projection_plan(PlannerInfo *root, ProjectionPath *best_path, int flags)
1860 : {
1861 : Plan *plan;
1862 : Plan *subplan;
1863 : List *tlist;
1864 255350 : bool needs_result_node = false;
1865 :
1866 : /*
1867 : * Convert our subpath to a Plan and determine whether we need a Result
1868 : * node.
1869 : *
1870 : * In most cases where we don't need to project, create_projection_path
1871 : * will have set dummypp, but not always. First, some createplan.c
1872 : * routines change the tlists of their nodes. (An example is that
1873 : * create_merge_append_plan might add resjunk sort columns to a
1874 : * MergeAppend.) Second, create_projection_path has no way of knowing
1875 : * what path node will be placed on top of the projection path and
1876 : * therefore can't predict whether it will require an exact tlist. For
1877 : * both of these reasons, we have to recheck here.
1878 : */
1879 255350 : if (use_physical_tlist(root, &best_path->path, flags))
1880 : {
1881 : /*
1882 : * Our caller doesn't really care what tlist we return, so we don't
1883 : * actually need to project. However, we may still need to ensure
1884 : * proper sortgroupref labels, if the caller cares about those.
1885 : */
1886 1421 : subplan = create_plan_recurse(root, best_path->subpath, 0);
1887 1421 : tlist = subplan->targetlist;
1888 1421 : if (flags & CP_LABEL_TLIST)
1889 727 : apply_pathtarget_labeling_to_tlist(tlist,
1890 : best_path->path.pathtarget);
1891 : }
1892 253929 : else if (is_projection_capable_path(best_path->subpath))
1893 : {
1894 : /*
1895 : * Our caller requires that we return the exact tlist, but no separate
1896 : * result node is needed because the subpath is projection-capable.
1897 : * Tell create_plan_recurse that we're going to ignore the tlist it
1898 : * produces.
1899 : */
1900 252511 : subplan = create_plan_recurse(root, best_path->subpath,
1901 : CP_IGNORE_TLIST);
1902 : Assert(is_projection_capable_plan(subplan));
1903 252511 : tlist = build_path_tlist(root, &best_path->path);
1904 : }
1905 : else
1906 : {
1907 : /*
1908 : * It looks like we need a result node, unless by good fortune the
1909 : * requested tlist is exactly the one the child wants to produce.
1910 : */
1911 1418 : subplan = create_plan_recurse(root, best_path->subpath, 0);
1912 1418 : tlist = build_path_tlist(root, &best_path->path);
1913 1418 : needs_result_node = !tlist_same_exprs(tlist, subplan->targetlist);
1914 : }
1915 :
1916 : /*
1917 : * If we make a different decision about whether to include a Result node
1918 : * than create_projection_path did, we'll have made slightly wrong cost
1919 : * estimates; but label the plan with the cost estimates we actually used,
1920 : * not "corrected" ones. (XXX this could be cleaned up if we moved more
1921 : * of the sortcolumn setup logic into Path creation, but that would add
1922 : * expense to creating Paths we might end up not using.)
1923 : */
1924 255350 : if (!needs_result_node)
1925 : {
1926 : /* Don't need a separate Result, just assign tlist to subplan */
1927 254063 : plan = subplan;
1928 254063 : plan->targetlist = tlist;
1929 :
1930 : /* Label plan with the estimated costs we actually used */
1931 254063 : plan->startup_cost = best_path->path.startup_cost;
1932 254063 : plan->total_cost = best_path->path.total_cost;
1933 254063 : plan->plan_rows = best_path->path.rows;
1934 254063 : plan->plan_width = best_path->path.pathtarget->width;
1935 254063 : plan->parallel_safe = best_path->path.parallel_safe;
1936 : /* ... but don't change subplan's parallel_aware flag */
1937 : }
1938 : else
1939 : {
1940 1287 : plan = (Plan *) make_gating_result(tlist, NULL, subplan);
1941 :
1942 1287 : copy_generic_path_info(plan, (Path *) best_path);
1943 : }
1944 :
1945 255350 : return plan;
1946 : }
1947 :
1948 : /*
1949 : * inject_projection_plan
1950 : * Insert a Result node to do a projection step.
1951 : *
1952 : * This is used in a few places where we decide on-the-fly that we need a
1953 : * projection step as part of the tree generated for some Path node.
1954 : * We should try to get rid of this in favor of doing it more honestly.
1955 : *
1956 : * One reason it's ugly is we have to be told the right parallel_safe marking
1957 : * to apply (since the tlist might be unsafe even if the child plan is safe).
1958 : */
1959 : static Plan *
1960 27 : inject_projection_plan(Plan *subplan, List *tlist, bool parallel_safe)
1961 : {
1962 : Plan *plan;
1963 :
1964 27 : plan = (Plan *) make_gating_result(tlist, NULL, subplan);
1965 :
1966 : /*
1967 : * In principle, we should charge tlist eval cost plus cpu_per_tuple per
1968 : * row for the Result node. But the former has probably been factored in
1969 : * already and the latter was not accounted for during Path construction,
1970 : * so being formally correct might just make the EXPLAIN output look less
1971 : * consistent not more so. Hence, just copy the subplan's cost.
1972 : */
1973 27 : copy_plan_costsize(plan, subplan);
1974 27 : plan->parallel_safe = parallel_safe;
1975 :
1976 27 : return plan;
1977 : }
1978 :
1979 : /*
1980 : * change_plan_targetlist
1981 : * Externally available wrapper for inject_projection_plan.
1982 : *
1983 : * This is meant for use by FDW plan-generation functions, which might
1984 : * want to adjust the tlist computed by some subplan tree. In general,
1985 : * a Result node is needed to compute the new tlist, but we can optimize
1986 : * some cases.
1987 : *
1988 : * In most cases, tlist_parallel_safe can just be passed as the parallel_safe
1989 : * flag of the FDW's own Path node.
1990 : */
1991 : Plan *
1992 51 : change_plan_targetlist(Plan *subplan, List *tlist, bool tlist_parallel_safe)
1993 : {
1994 : /*
1995 : * If the top plan node can't do projections and its existing target list
1996 : * isn't already what we need, we need to add a Result node to help it
1997 : * along.
1998 : */
1999 51 : if (!is_projection_capable_plan(subplan) &&
2000 9 : !tlist_same_exprs(tlist, subplan->targetlist))
2001 6 : subplan = inject_projection_plan(subplan, tlist,
2002 6 : subplan->parallel_safe &&
2003 6 : tlist_parallel_safe);
2004 : else
2005 : {
2006 : /* Else we can just replace the plan node's tlist */
2007 45 : subplan->targetlist = tlist;
2008 45 : subplan->parallel_safe &= tlist_parallel_safe;
2009 : }
2010 51 : return subplan;
2011 : }
2012 :
2013 : /*
2014 : * create_sort_plan
2015 : *
2016 : * Create a Sort plan for 'best_path' and (recursively) plans
2017 : * for its subpaths.
2018 : */
2019 : static Sort *
2020 57315 : create_sort_plan(PlannerInfo *root, SortPath *best_path, int flags)
2021 : {
2022 : Sort *plan;
2023 : Plan *subplan;
2024 :
2025 : /*
2026 : * We don't want any excess columns in the sorted tuples, so request a
2027 : * smaller tlist. Otherwise, since Sort doesn't project, tlist
2028 : * requirements pass through.
2029 : */
2030 57315 : subplan = create_plan_recurse(root, best_path->subpath,
2031 : flags | CP_SMALL_TLIST);
2032 :
2033 : /*
2034 : * make_sort_from_pathkeys indirectly calls find_ec_member_matching_expr,
2035 : * which will ignore any child EC members that don't belong to the given
2036 : * relids. Thus, if this sort path is based on a child relation, we must
2037 : * pass its relids.
2038 : */
2039 57315 : plan = make_sort_from_pathkeys(subplan, best_path->path.pathkeys,
2040 57315 : IS_OTHER_REL(best_path->subpath->parent) ?
2041 385 : best_path->path.parent->relids : NULL);
2042 :
2043 57315 : copy_generic_path_info(&plan->plan, (Path *) best_path);
2044 :
2045 57315 : return plan;
2046 : }
2047 :
2048 : /*
2049 : * create_incrementalsort_plan
2050 : *
2051 : * Do the same as create_sort_plan, but create IncrementalSort plan.
2052 : */
2053 : static IncrementalSort *
2054 710 : create_incrementalsort_plan(PlannerInfo *root, IncrementalSortPath *best_path,
2055 : int flags)
2056 : {
2057 : IncrementalSort *plan;
2058 : Plan *subplan;
2059 :
2060 : /* See comments in create_sort_plan() above */
2061 710 : subplan = create_plan_recurse(root, best_path->spath.subpath,
2062 : flags | CP_SMALL_TLIST);
2063 710 : plan = make_incrementalsort_from_pathkeys(subplan,
2064 : best_path->spath.path.pathkeys,
2065 710 : IS_OTHER_REL(best_path->spath.subpath->parent) ?
2066 30 : best_path->spath.path.parent->relids : NULL,
2067 : best_path->nPresortedCols);
2068 :
2069 710 : copy_generic_path_info(&plan->sort.plan, (Path *) best_path);
2070 :
2071 710 : return plan;
2072 : }
2073 :
2074 : /*
2075 : * create_group_plan
2076 : *
2077 : * Create a Group plan for 'best_path' and (recursively) plans
2078 : * for its subpaths.
2079 : */
2080 : static Group *
2081 206 : create_group_plan(PlannerInfo *root, GroupPath *best_path)
2082 : {
2083 : Group *plan;
2084 : Plan *subplan;
2085 : List *tlist;
2086 : List *quals;
2087 :
2088 : /*
2089 : * Group can project, so no need to be terribly picky about child tlist,
2090 : * but we do need grouping columns to be available
2091 : */
2092 206 : subplan = create_plan_recurse(root, best_path->subpath, CP_LABEL_TLIST);
2093 :
2094 206 : tlist = build_path_tlist(root, &best_path->path);
2095 :
2096 206 : quals = order_qual_clauses(root, best_path->qual);
2097 :
2098 412 : plan = make_group(tlist,
2099 : quals,
2100 206 : list_length(best_path->groupClause),
2101 : extract_grouping_cols(best_path->groupClause,
2102 : subplan->targetlist),
2103 : extract_grouping_ops(best_path->groupClause),
2104 : extract_grouping_collations(best_path->groupClause,
2105 : subplan->targetlist),
2106 : subplan);
2107 :
2108 206 : copy_generic_path_info(&plan->plan, (Path *) best_path);
2109 :
2110 206 : return plan;
2111 : }
2112 :
2113 : /*
2114 : * create_unique_plan
2115 : *
2116 : * Create a Unique plan for 'best_path' and (recursively) plans
2117 : * for its subpaths.
2118 : */
2119 : static Unique *
2120 4430 : create_unique_plan(PlannerInfo *root, UniquePath *best_path, int flags)
2121 : {
2122 : Unique *plan;
2123 : Plan *subplan;
2124 :
2125 : /*
2126 : * Unique doesn't project, so tlist requirements pass through; moreover we
2127 : * need grouping columns to be labeled.
2128 : */
2129 4430 : subplan = create_plan_recurse(root, best_path->subpath,
2130 : flags | CP_LABEL_TLIST);
2131 :
2132 : /*
2133 : * make_unique_from_pathkeys calls find_ec_member_matching_expr, which
2134 : * will ignore any child EC members that don't belong to the given relids.
2135 : * Thus, if this unique path is based on a child relation, we must pass
2136 : * its relids.
2137 : */
2138 4430 : plan = make_unique_from_pathkeys(subplan,
2139 : best_path->path.pathkeys,
2140 : best_path->numkeys,
2141 4430 : IS_OTHER_REL(best_path->path.parent) ?
2142 75 : best_path->path.parent->relids : NULL);
2143 :
2144 4430 : copy_generic_path_info(&plan->plan, (Path *) best_path);
2145 :
2146 4430 : return plan;
2147 : }
2148 :
2149 : /*
2150 : * create_agg_plan
2151 : *
2152 : * Create an Agg plan for 'best_path' and (recursively) plans
2153 : * for its subpaths.
2154 : */
2155 : static Agg *
2156 35490 : create_agg_plan(PlannerInfo *root, AggPath *best_path)
2157 : {
2158 : Agg *plan;
2159 : Plan *subplan;
2160 : List *tlist;
2161 : List *quals;
2162 :
2163 : /*
2164 : * Agg can project, so no need to be terribly picky about child tlist, but
2165 : * we do need grouping columns to be available
2166 : */
2167 35490 : subplan = create_plan_recurse(root, best_path->subpath, CP_LABEL_TLIST);
2168 :
2169 35490 : tlist = build_path_tlist(root, &best_path->path);
2170 :
2171 35490 : quals = order_qual_clauses(root, best_path->qual);
2172 :
2173 70980 : plan = make_agg(tlist, quals,
2174 : best_path->aggstrategy,
2175 : best_path->aggsplit,
2176 35490 : list_length(best_path->groupClause),
2177 : extract_grouping_cols(best_path->groupClause,
2178 : subplan->targetlist),
2179 : extract_grouping_ops(best_path->groupClause),
2180 : extract_grouping_collations(best_path->groupClause,
2181 : subplan->targetlist),
2182 : NIL,
2183 : NIL,
2184 : best_path->numGroups,
2185 : best_path->transitionSpace,
2186 : subplan);
2187 :
2188 35490 : copy_generic_path_info(&plan->plan, (Path *) best_path);
2189 :
2190 35490 : return plan;
2191 : }
2192 :
2193 : /*
2194 : * Given a groupclause for a collection of grouping sets, produce the
2195 : * corresponding groupColIdx.
2196 : *
2197 : * root->grouping_map maps the tleSortGroupRef to the actual column position in
2198 : * the input tuple. So we get the ref from the entries in the groupclause and
2199 : * look them up there.
2200 : */
2201 : static AttrNumber *
2202 1730 : remap_groupColIdx(PlannerInfo *root, List *groupClause)
2203 : {
2204 1730 : AttrNumber *grouping_map = root->grouping_map;
2205 : AttrNumber *new_grpColIdx;
2206 : ListCell *lc;
2207 : int i;
2208 :
2209 : Assert(grouping_map);
2210 :
2211 1730 : new_grpColIdx = palloc0_array(AttrNumber, list_length(groupClause));
2212 :
2213 1730 : i = 0;
2214 3956 : foreach(lc, groupClause)
2215 : {
2216 2226 : SortGroupClause *clause = lfirst(lc);
2217 :
2218 2226 : new_grpColIdx[i++] = grouping_map[clause->tleSortGroupRef];
2219 : }
2220 :
2221 1730 : return new_grpColIdx;
2222 : }
2223 :
2224 : /*
2225 : * create_groupingsets_plan
2226 : * Create a plan for 'best_path' and (recursively) plans
2227 : * for its subpaths.
2228 : *
2229 : * What we emit is an Agg plan with some vestigial Agg and Sort nodes
2230 : * hanging off the side. The top Agg implements the last grouping set
2231 : * specified in the GroupingSetsPath, and any additional grouping sets
2232 : * each give rise to a subsidiary Agg and Sort node in the top Agg's
2233 : * "chain" list. These nodes don't participate in the plan directly,
2234 : * but they are a convenient way to represent the required data for
2235 : * the extra steps.
2236 : *
2237 : * Returns a Plan node.
2238 : */
2239 : static Plan *
2240 827 : create_groupingsets_plan(PlannerInfo *root, GroupingSetsPath *best_path)
2241 : {
2242 : Agg *plan;
2243 : Plan *subplan;
2244 827 : List *rollups = best_path->rollups;
2245 : AttrNumber *grouping_map;
2246 : int maxref;
2247 : List *chain;
2248 : ListCell *lc;
2249 :
2250 : /* Shouldn't get here without grouping sets */
2251 : Assert(root->parse->groupingSets);
2252 : Assert(rollups != NIL);
2253 :
2254 : /*
2255 : * Agg can project, so no need to be terribly picky about child tlist, but
2256 : * we do need grouping columns to be available
2257 : */
2258 827 : subplan = create_plan_recurse(root, best_path->subpath, CP_LABEL_TLIST);
2259 :
2260 : /*
2261 : * Compute the mapping from tleSortGroupRef to column index in the child's
2262 : * tlist. First, identify max SortGroupRef in groupClause, for array
2263 : * sizing.
2264 : */
2265 827 : maxref = 0;
2266 2522 : foreach(lc, root->processed_groupClause)
2267 : {
2268 1695 : SortGroupClause *gc = (SortGroupClause *) lfirst(lc);
2269 :
2270 1695 : if (gc->tleSortGroupRef > maxref)
2271 1655 : maxref = gc->tleSortGroupRef;
2272 : }
2273 :
2274 827 : grouping_map = (AttrNumber *) palloc0((maxref + 1) * sizeof(AttrNumber));
2275 :
2276 : /* Now look up the column numbers in the child's tlist */
2277 2522 : foreach(lc, root->processed_groupClause)
2278 : {
2279 1695 : SortGroupClause *gc = (SortGroupClause *) lfirst(lc);
2280 1695 : TargetEntry *tle = get_sortgroupclause_tle(gc, subplan->targetlist);
2281 :
2282 1695 : grouping_map[gc->tleSortGroupRef] = tle->resno;
2283 : }
2284 :
2285 : /*
2286 : * During setrefs.c, we'll need the grouping_map to fix up the cols lists
2287 : * in GroupingFunc nodes. Save it for setrefs.c to use.
2288 : */
2289 : Assert(root->grouping_map == NULL);
2290 827 : root->grouping_map = grouping_map;
2291 :
2292 : /*
2293 : * Generate the side nodes that describe the other sort and group
2294 : * operations besides the top one. Note that we don't worry about putting
2295 : * accurate cost estimates in the side nodes; only the topmost Agg node's
2296 : * costs will be shown by EXPLAIN.
2297 : */
2298 827 : chain = NIL;
2299 827 : if (list_length(rollups) > 1)
2300 : {
2301 552 : bool is_first_sort = ((RollupData *) linitial(rollups))->is_hashed;
2302 :
2303 1455 : for_each_from(lc, rollups, 1)
2304 : {
2305 903 : RollupData *rollup = lfirst(lc);
2306 : AttrNumber *new_grpColIdx;
2307 903 : Plan *sort_plan = NULL;
2308 : Plan *agg_plan;
2309 : AggStrategy strat;
2310 :
2311 903 : new_grpColIdx = remap_groupColIdx(root, rollup->groupClause);
2312 :
2313 903 : if (!rollup->is_hashed && !is_first_sort)
2314 : {
2315 : sort_plan = (Plan *)
2316 240 : make_sort_from_groupcols(rollup->groupClause,
2317 : new_grpColIdx,
2318 : subplan);
2319 : }
2320 :
2321 903 : if (!rollup->is_hashed)
2322 455 : is_first_sort = false;
2323 :
2324 903 : if (rollup->is_hashed)
2325 448 : strat = AGG_HASHED;
2326 455 : else if (linitial(rollup->gsets) == NIL)
2327 164 : strat = AGG_PLAIN;
2328 : else
2329 291 : strat = AGG_SORTED;
2330 :
2331 1806 : agg_plan = (Plan *) make_agg(NIL,
2332 : NIL,
2333 : strat,
2334 : AGGSPLIT_SIMPLE,
2335 903 : list_length((List *) linitial(rollup->gsets)),
2336 : new_grpColIdx,
2337 : extract_grouping_ops(rollup->groupClause),
2338 : extract_grouping_collations(rollup->groupClause, subplan->targetlist),
2339 : rollup->gsets,
2340 : NIL,
2341 : rollup->numGroups,
2342 : best_path->transitionSpace,
2343 : sort_plan);
2344 :
2345 : /*
2346 : * Remove stuff we don't need to avoid bloating debug output.
2347 : */
2348 903 : if (sort_plan)
2349 : {
2350 240 : sort_plan->targetlist = NIL;
2351 240 : sort_plan->lefttree = NULL;
2352 : }
2353 :
2354 903 : chain = lappend(chain, agg_plan);
2355 : }
2356 : }
2357 :
2358 : /*
2359 : * Now make the real Agg node
2360 : */
2361 : {
2362 827 : RollupData *rollup = linitial(rollups);
2363 : AttrNumber *top_grpColIdx;
2364 : int numGroupCols;
2365 :
2366 827 : top_grpColIdx = remap_groupColIdx(root, rollup->groupClause);
2367 :
2368 827 : numGroupCols = list_length((List *) linitial(rollup->gsets));
2369 :
2370 827 : plan = make_agg(build_path_tlist(root, &best_path->path),
2371 : best_path->qual,
2372 : best_path->aggstrategy,
2373 : AGGSPLIT_SIMPLE,
2374 : numGroupCols,
2375 : top_grpColIdx,
2376 : extract_grouping_ops(rollup->groupClause),
2377 : extract_grouping_collations(rollup->groupClause, subplan->targetlist),
2378 : rollup->gsets,
2379 : chain,
2380 : rollup->numGroups,
2381 : best_path->transitionSpace,
2382 : subplan);
2383 :
2384 : /* Copy cost data from Path to Plan */
2385 827 : copy_generic_path_info(&plan->plan, &best_path->path);
2386 : }
2387 :
2388 827 : return (Plan *) plan;
2389 : }
2390 :
2391 : /*
2392 : * create_minmaxagg_plan
2393 : *
2394 : * Create a Result plan for 'best_path' and (recursively) plans
2395 : * for its subpaths.
2396 : */
2397 : static Result *
2398 296 : create_minmaxagg_plan(PlannerInfo *root, MinMaxAggPath *best_path)
2399 : {
2400 : Result *plan;
2401 : List *tlist;
2402 : ListCell *lc;
2403 :
2404 : /* Prepare an InitPlan for each aggregate's subquery. */
2405 622 : foreach(lc, best_path->mmaggregates)
2406 : {
2407 326 : MinMaxAggInfo *mminfo = (MinMaxAggInfo *) lfirst(lc);
2408 326 : PlannerInfo *subroot = mminfo->subroot;
2409 326 : Query *subparse = subroot->parse;
2410 : Plan *plan;
2411 :
2412 : /*
2413 : * Generate the plan for the subquery. We already have a Path, but we
2414 : * have to convert it to a Plan and attach a LIMIT node above it.
2415 : * Since we are entering a different planner context (subroot),
2416 : * recurse to create_plan not create_plan_recurse.
2417 : */
2418 326 : plan = create_plan(subroot, mminfo->path);
2419 :
2420 326 : plan = (Plan *) make_limit(plan,
2421 : subparse->limitOffset,
2422 : subparse->limitCount,
2423 : subparse->limitOption,
2424 : 0, NULL, NULL, NULL);
2425 :
2426 : /* Must apply correct cost/width data to Limit node */
2427 326 : plan->disabled_nodes = mminfo->path->disabled_nodes;
2428 326 : plan->startup_cost = mminfo->path->startup_cost;
2429 326 : plan->total_cost = mminfo->pathcost;
2430 326 : plan->plan_rows = 1;
2431 326 : plan->plan_width = mminfo->path->pathtarget->width;
2432 326 : plan->parallel_aware = false;
2433 326 : plan->parallel_safe = mminfo->path->parallel_safe;
2434 :
2435 : /* Convert the plan into an InitPlan in the outer query. */
2436 326 : SS_make_initplan_from_plan(root, subroot, plan, mminfo->param);
2437 : }
2438 :
2439 : /* Generate the output plan --- basically just a Result */
2440 296 : tlist = build_path_tlist(root, &best_path->path);
2441 :
2442 296 : plan = make_one_row_result(tlist, (Node *) best_path->quals,
2443 : best_path->path.parent);
2444 296 : plan->result_type = RESULT_TYPE_MINMAX;
2445 :
2446 296 : copy_generic_path_info(&plan->plan, (Path *) best_path);
2447 :
2448 : /*
2449 : * During setrefs.c, we'll need to replace references to the Agg nodes
2450 : * with InitPlan output params. (We can't just do that locally in the
2451 : * MinMaxAgg node, because path nodes above here may have Agg references
2452 : * as well.) Save the mmaggregates list to tell setrefs.c to do that.
2453 : */
2454 : Assert(root->minmax_aggs == NIL);
2455 296 : root->minmax_aggs = best_path->mmaggregates;
2456 :
2457 296 : return plan;
2458 : }
2459 :
2460 : /*
2461 : * create_windowagg_plan
2462 : *
2463 : * Create a WindowAgg plan for 'best_path' and (recursively) plans
2464 : * for its subpaths.
2465 : */
2466 : static WindowAgg *
2467 2347 : create_windowagg_plan(PlannerInfo *root, WindowAggPath *best_path)
2468 : {
2469 : WindowAgg *plan;
2470 2347 : WindowClause *wc = best_path->winclause;
2471 2347 : int numPart = list_length(wc->partitionClause);
2472 2347 : int numOrder = list_length(wc->orderClause);
2473 : Plan *subplan;
2474 : List *tlist;
2475 : int partNumCols;
2476 : AttrNumber *partColIdx;
2477 : Oid *partOperators;
2478 : Oid *partCollations;
2479 : int ordNumCols;
2480 : AttrNumber *ordColIdx;
2481 : Oid *ordOperators;
2482 : Oid *ordCollations;
2483 : ListCell *lc;
2484 :
2485 : /*
2486 : * Choice of tlist here is motivated by the fact that WindowAgg will be
2487 : * storing the input rows of window frames in a tuplestore; it therefore
2488 : * behooves us to request a small tlist to avoid wasting space. We do of
2489 : * course need grouping columns to be available.
2490 : */
2491 2347 : subplan = create_plan_recurse(root, best_path->subpath,
2492 : CP_LABEL_TLIST | CP_SMALL_TLIST);
2493 :
2494 2347 : tlist = build_path_tlist(root, &best_path->path);
2495 :
2496 : /*
2497 : * Convert SortGroupClause lists into arrays of attr indexes and equality
2498 : * operators, as wanted by executor.
2499 : */
2500 2347 : partColIdx = palloc_array(AttrNumber, numPart);
2501 2347 : partOperators = palloc_array(Oid, numPart);
2502 2347 : partCollations = palloc_array(Oid, numPart);
2503 :
2504 2347 : partNumCols = 0;
2505 2959 : foreach(lc, wc->partitionClause)
2506 : {
2507 612 : SortGroupClause *sgc = (SortGroupClause *) lfirst(lc);
2508 612 : TargetEntry *tle = get_sortgroupclause_tle(sgc, subplan->targetlist);
2509 :
2510 : Assert(OidIsValid(sgc->eqop));
2511 612 : partColIdx[partNumCols] = tle->resno;
2512 612 : partOperators[partNumCols] = sgc->eqop;
2513 612 : partCollations[partNumCols] = exprCollation((Node *) tle->expr);
2514 612 : partNumCols++;
2515 : }
2516 :
2517 2347 : ordColIdx = palloc_array(AttrNumber, numOrder);
2518 2347 : ordOperators = palloc_array(Oid, numOrder);
2519 2347 : ordCollations = palloc_array(Oid, numOrder);
2520 :
2521 2347 : ordNumCols = 0;
2522 4237 : foreach(lc, wc->orderClause)
2523 : {
2524 1890 : SortGroupClause *sgc = (SortGroupClause *) lfirst(lc);
2525 1890 : TargetEntry *tle = get_sortgroupclause_tle(sgc, subplan->targetlist);
2526 :
2527 : Assert(OidIsValid(sgc->eqop));
2528 1890 : ordColIdx[ordNumCols] = tle->resno;
2529 1890 : ordOperators[ordNumCols] = sgc->eqop;
2530 1890 : ordCollations[ordNumCols] = exprCollation((Node *) tle->expr);
2531 1890 : ordNumCols++;
2532 : }
2533 :
2534 : /* And finally we can make the WindowAgg node */
2535 2347 : plan = make_windowagg(tlist,
2536 : wc,
2537 : partNumCols,
2538 : partColIdx,
2539 : partOperators,
2540 : partCollations,
2541 : ordNumCols,
2542 : ordColIdx,
2543 : ordOperators,
2544 : ordCollations,
2545 : best_path->runCondition,
2546 : best_path->qual,
2547 2347 : best_path->topwindow,
2548 : subplan);
2549 :
2550 2347 : copy_generic_path_info(&plan->plan, (Path *) best_path);
2551 :
2552 2347 : return plan;
2553 : }
2554 :
2555 : /*
2556 : * create_setop_plan
2557 : *
2558 : * Create a SetOp plan for 'best_path' and (recursively) plans
2559 : * for its subpaths.
2560 : */
2561 : static SetOp *
2562 599 : create_setop_plan(PlannerInfo *root, SetOpPath *best_path, int flags)
2563 : {
2564 : SetOp *plan;
2565 599 : List *tlist = build_path_tlist(root, &best_path->path);
2566 : Plan *leftplan;
2567 : Plan *rightplan;
2568 :
2569 : /*
2570 : * SetOp doesn't project, so tlist requirements pass through; moreover we
2571 : * need grouping columns to be labeled.
2572 : */
2573 599 : leftplan = create_plan_recurse(root, best_path->leftpath,
2574 : flags | CP_LABEL_TLIST);
2575 599 : rightplan = create_plan_recurse(root, best_path->rightpath,
2576 : flags | CP_LABEL_TLIST);
2577 :
2578 599 : plan = make_setop(best_path->cmd,
2579 : best_path->strategy,
2580 : tlist,
2581 : leftplan,
2582 : rightplan,
2583 : best_path->groupList,
2584 : best_path->numGroups);
2585 :
2586 599 : copy_generic_path_info(&plan->plan, (Path *) best_path);
2587 :
2588 599 : return plan;
2589 : }
2590 :
2591 : /*
2592 : * create_recursiveunion_plan
2593 : *
2594 : * Create a RecursiveUnion plan for 'best_path' and (recursively) plans
2595 : * for its subpaths.
2596 : */
2597 : static RecursiveUnion *
2598 686 : create_recursiveunion_plan(PlannerInfo *root, RecursiveUnionPath *best_path)
2599 : {
2600 : RecursiveUnion *plan;
2601 : Plan *leftplan;
2602 : Plan *rightplan;
2603 : List *tlist;
2604 :
2605 : /* Need both children to produce same tlist, so force it */
2606 686 : leftplan = create_plan_recurse(root, best_path->leftpath, CP_EXACT_TLIST);
2607 686 : rightplan = create_plan_recurse(root, best_path->rightpath, CP_EXACT_TLIST);
2608 :
2609 686 : tlist = build_path_tlist(root, &best_path->path);
2610 :
2611 686 : plan = make_recursive_union(tlist,
2612 : leftplan,
2613 : rightplan,
2614 : best_path->wtParam,
2615 : best_path->distinctList,
2616 : best_path->numGroups);
2617 :
2618 686 : copy_generic_path_info(&plan->plan, (Path *) best_path);
2619 :
2620 686 : return plan;
2621 : }
2622 :
2623 : /*
2624 : * create_lockrows_plan
2625 : *
2626 : * Create a LockRows plan for 'best_path' and (recursively) plans
2627 : * for its subpaths.
2628 : */
2629 : static LockRows *
2630 8497 : create_lockrows_plan(PlannerInfo *root, LockRowsPath *best_path,
2631 : int flags)
2632 : {
2633 : LockRows *plan;
2634 : Plan *subplan;
2635 :
2636 : /* LockRows doesn't project, so tlist requirements pass through */
2637 8497 : subplan = create_plan_recurse(root, best_path->subpath, flags);
2638 :
2639 8497 : plan = make_lockrows(subplan, best_path->rowMarks, best_path->epqParam);
2640 :
2641 8497 : copy_generic_path_info(&plan->plan, (Path *) best_path);
2642 :
2643 8497 : return plan;
2644 : }
2645 :
2646 : /*
2647 : * create_modifytable_plan
2648 : * Create a ModifyTable plan for 'best_path'.
2649 : *
2650 : * Returns a Plan node.
2651 : */
2652 : static ModifyTable *
2653 62779 : create_modifytable_plan(PlannerInfo *root, ModifyTablePath *best_path)
2654 : {
2655 : ModifyTable *plan;
2656 62779 : Path *subpath = best_path->subpath;
2657 : Plan *subplan;
2658 :
2659 : /* Subplan must produce exactly the specified tlist */
2660 62779 : subplan = create_plan_recurse(root, subpath, CP_EXACT_TLIST);
2661 :
2662 : /* Transfer resname/resjunk labeling, too, to keep executor happy */
2663 62779 : apply_tlist_labeling(subplan->targetlist, root->processed_tlist);
2664 :
2665 62779 : plan = make_modifytable(root,
2666 : subplan,
2667 : best_path->operation,
2668 62779 : best_path->canSetTag,
2669 : best_path->nominalRelation,
2670 : best_path->rootRelation,
2671 : best_path->resultRelations,
2672 : best_path->updateColnosLists,
2673 : best_path->withCheckOptionLists,
2674 : best_path->returningLists,
2675 : best_path->rowMarks,
2676 : best_path->onconflict,
2677 : best_path->mergeActionLists,
2678 : best_path->mergeJoinConditions,
2679 : best_path->epqParam);
2680 :
2681 62509 : copy_generic_path_info(&plan->plan, &best_path->path);
2682 :
2683 62509 : return plan;
2684 : }
2685 :
2686 : /*
2687 : * create_limit_plan
2688 : *
2689 : * Create a Limit plan for 'best_path' and (recursively) plans
2690 : * for its subpaths.
2691 : */
2692 : static Limit *
2693 3263 : create_limit_plan(PlannerInfo *root, LimitPath *best_path, int flags)
2694 : {
2695 : Limit *plan;
2696 : Plan *subplan;
2697 3263 : int numUniqkeys = 0;
2698 3263 : AttrNumber *uniqColIdx = NULL;
2699 3263 : Oid *uniqOperators = NULL;
2700 3263 : Oid *uniqCollations = NULL;
2701 :
2702 : /* Limit doesn't project, so tlist requirements pass through */
2703 3263 : subplan = create_plan_recurse(root, best_path->subpath, flags);
2704 :
2705 : /* Extract information necessary for comparing rows for WITH TIES. */
2706 3263 : if (best_path->limitOption == LIMIT_OPTION_WITH_TIES)
2707 : {
2708 23 : Query *parse = root->parse;
2709 : ListCell *l;
2710 :
2711 23 : numUniqkeys = list_length(parse->sortClause);
2712 23 : uniqColIdx = (AttrNumber *) palloc(numUniqkeys * sizeof(AttrNumber));
2713 23 : uniqOperators = (Oid *) palloc(numUniqkeys * sizeof(Oid));
2714 23 : uniqCollations = (Oid *) palloc(numUniqkeys * sizeof(Oid));
2715 :
2716 23 : numUniqkeys = 0;
2717 46 : foreach(l, parse->sortClause)
2718 : {
2719 23 : SortGroupClause *sortcl = (SortGroupClause *) lfirst(l);
2720 23 : TargetEntry *tle = get_sortgroupclause_tle(sortcl, parse->targetList);
2721 :
2722 23 : uniqColIdx[numUniqkeys] = tle->resno;
2723 23 : uniqOperators[numUniqkeys] = sortcl->eqop;
2724 23 : uniqCollations[numUniqkeys] = exprCollation((Node *) tle->expr);
2725 23 : numUniqkeys++;
2726 : }
2727 : }
2728 :
2729 3263 : plan = make_limit(subplan,
2730 : best_path->limitOffset,
2731 : best_path->limitCount,
2732 : best_path->limitOption,
2733 : numUniqkeys, uniqColIdx, uniqOperators, uniqCollations);
2734 :
2735 3263 : copy_generic_path_info(&plan->plan, (Path *) best_path);
2736 :
2737 3263 : return plan;
2738 : }
2739 :
2740 :
2741 : /*****************************************************************************
2742 : *
2743 : * BASE-RELATION SCAN METHODS
2744 : *
2745 : *****************************************************************************/
2746 :
2747 :
2748 : /*
2749 : * create_seqscan_plan
2750 : * Returns a seqscan plan for the base relation scanned by 'best_path'
2751 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
2752 : */
2753 : static SeqScan *
2754 182617 : create_seqscan_plan(PlannerInfo *root, Path *best_path,
2755 : List *tlist, List *scan_clauses)
2756 : {
2757 : SeqScan *scan_plan;
2758 182617 : Index scan_relid = best_path->parent->relid;
2759 :
2760 : /* it should be a base rel... */
2761 : Assert(scan_relid > 0);
2762 : Assert(best_path->parent->rtekind == RTE_RELATION);
2763 :
2764 : /* Sort clauses into best execution order */
2765 182617 : scan_clauses = order_qual_clauses(root, scan_clauses);
2766 :
2767 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
2768 182617 : scan_clauses = extract_actual_clauses(scan_clauses, false);
2769 :
2770 : /* Replace any outer-relation variables with nestloop params */
2771 182617 : if (best_path->param_info)
2772 : {
2773 : scan_clauses = (List *)
2774 393 : replace_nestloop_params(root, (Node *) scan_clauses);
2775 : }
2776 :
2777 182617 : scan_plan = make_seqscan(tlist,
2778 : scan_clauses,
2779 : scan_relid);
2780 :
2781 182617 : copy_generic_path_info(&scan_plan->scan.plan, best_path);
2782 :
2783 182617 : return scan_plan;
2784 : }
2785 :
2786 : /*
2787 : * create_samplescan_plan
2788 : * Returns a samplescan plan for the base relation scanned by 'best_path'
2789 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
2790 : */
2791 : static SampleScan *
2792 243 : create_samplescan_plan(PlannerInfo *root, Path *best_path,
2793 : List *tlist, List *scan_clauses)
2794 : {
2795 : SampleScan *scan_plan;
2796 243 : Index scan_relid = best_path->parent->relid;
2797 : RangeTblEntry *rte;
2798 : TableSampleClause *tsc;
2799 :
2800 : /* it should be a base rel with a tablesample clause... */
2801 : Assert(scan_relid > 0);
2802 243 : rte = planner_rt_fetch(scan_relid, root);
2803 : Assert(rte->rtekind == RTE_RELATION);
2804 243 : tsc = rte->tablesample;
2805 : Assert(tsc != NULL);
2806 :
2807 : /* Sort clauses into best execution order */
2808 243 : scan_clauses = order_qual_clauses(root, scan_clauses);
2809 :
2810 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
2811 243 : scan_clauses = extract_actual_clauses(scan_clauses, false);
2812 :
2813 : /* Replace any outer-relation variables with nestloop params */
2814 243 : if (best_path->param_info)
2815 : {
2816 : scan_clauses = (List *)
2817 60 : replace_nestloop_params(root, (Node *) scan_clauses);
2818 : tsc = (TableSampleClause *)
2819 60 : replace_nestloop_params(root, (Node *) tsc);
2820 : }
2821 :
2822 243 : scan_plan = make_samplescan(tlist,
2823 : scan_clauses,
2824 : scan_relid,
2825 : tsc);
2826 :
2827 243 : copy_generic_path_info(&scan_plan->scan.plan, best_path);
2828 :
2829 243 : return scan_plan;
2830 : }
2831 :
2832 : /*
2833 : * create_indexscan_plan
2834 : * Returns an indexscan plan for the base relation scanned by 'best_path'
2835 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
2836 : *
2837 : * We use this for both plain IndexScans and IndexOnlyScans, because the
2838 : * qual preprocessing work is the same for both. Note that the caller tells
2839 : * us which to build --- we don't look at best_path->path.pathtype, because
2840 : * create_bitmap_subplan needs to be able to override the prior decision.
2841 : */
2842 : static Scan *
2843 133958 : create_indexscan_plan(PlannerInfo *root,
2844 : IndexPath *best_path,
2845 : List *tlist,
2846 : List *scan_clauses,
2847 : bool indexonly)
2848 : {
2849 : Scan *scan_plan;
2850 133958 : List *indexclauses = best_path->indexclauses;
2851 133958 : List *indexorderbys = best_path->indexorderbys;
2852 133958 : Index baserelid = best_path->path.parent->relid;
2853 133958 : IndexOptInfo *indexinfo = best_path->indexinfo;
2854 133958 : Oid indexoid = indexinfo->indexoid;
2855 : List *qpqual;
2856 : List *stripped_indexquals;
2857 : List *fixed_indexquals;
2858 : List *fixed_indexorderbys;
2859 133958 : List *indexorderbyops = NIL;
2860 : ListCell *l;
2861 :
2862 : /* it should be a base rel... */
2863 : Assert(baserelid > 0);
2864 : Assert(best_path->path.parent->rtekind == RTE_RELATION);
2865 : /* check the scan direction is valid */
2866 : Assert(best_path->indexscandir == ForwardScanDirection ||
2867 : best_path->indexscandir == BackwardScanDirection);
2868 :
2869 : /*
2870 : * Extract the index qual expressions (stripped of RestrictInfos) from the
2871 : * IndexClauses list, and prepare a copy with index Vars substituted for
2872 : * table Vars. (This step also does replace_nestloop_params on the
2873 : * fixed_indexquals.)
2874 : */
2875 133958 : fix_indexqual_references(root, best_path,
2876 : &stripped_indexquals,
2877 : &fixed_indexquals);
2878 :
2879 : /*
2880 : * Likewise fix up index attr references in the ORDER BY expressions.
2881 : */
2882 133958 : fixed_indexorderbys = fix_indexorderby_references(root, best_path);
2883 :
2884 : /*
2885 : * The qpqual list must contain all restrictions not automatically handled
2886 : * by the index, other than pseudoconstant clauses which will be handled
2887 : * by a separate gating plan node. All the predicates in the indexquals
2888 : * will be checked (either by the index itself, or by nodeIndexscan.c),
2889 : * but if there are any "special" operators involved then they must be
2890 : * included in qpqual. The upshot is that qpqual must contain
2891 : * scan_clauses minus whatever appears in indexquals.
2892 : *
2893 : * is_redundant_with_indexclauses() detects cases where a scan clause is
2894 : * present in the indexclauses list or is generated from the same
2895 : * EquivalenceClass as some indexclause, and is therefore redundant with
2896 : * it, though not equal. (The latter happens when indxpath.c prefers a
2897 : * different derived equality than what generate_join_implied_equalities
2898 : * picked for a parameterized scan's ppi_clauses.) Note that it will not
2899 : * match to lossy index clauses, which is critical because we have to
2900 : * include the original clause in qpqual in that case.
2901 : *
2902 : * In some situations (particularly with OR'd index conditions) we may
2903 : * have scan_clauses that are not equal to, but are logically implied by,
2904 : * the index quals; so we also try a predicate_implied_by() check to see
2905 : * if we can discard quals that way. (predicate_implied_by assumes its
2906 : * first input contains only immutable functions, so we have to check
2907 : * that.)
2908 : *
2909 : * Note: if you change this bit of code you should also look at
2910 : * extract_nonindex_conditions() in costsize.c.
2911 : */
2912 133958 : qpqual = NIL;
2913 315323 : foreach(l, scan_clauses)
2914 : {
2915 181365 : RestrictInfo *rinfo = lfirst_node(RestrictInfo, l);
2916 :
2917 181365 : if (rinfo->pseudoconstant)
2918 1683 : continue; /* we may drop pseudoconstants here */
2919 179682 : if (is_redundant_with_indexclauses(rinfo, indexclauses))
2920 126261 : continue; /* dup or derived from same EquivalenceClass */
2921 104762 : if (!contain_mutable_functions((Node *) rinfo->clause) &&
2922 51341 : predicate_implied_by(list_make1(rinfo->clause), stripped_indexquals,
2923 : false))
2924 165 : continue; /* provably implied by indexquals */
2925 53256 : qpqual = lappend(qpqual, rinfo);
2926 : }
2927 :
2928 : /* Sort clauses into best execution order */
2929 133958 : qpqual = order_qual_clauses(root, qpqual);
2930 :
2931 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
2932 133958 : qpqual = extract_actual_clauses(qpqual, false);
2933 :
2934 : /*
2935 : * We have to replace any outer-relation variables with nestloop params in
2936 : * the indexqualorig, qpqual, and indexorderbyorig expressions. A bit
2937 : * annoying to have to do this separately from the processing in
2938 : * fix_indexqual_references --- rethink this when generalizing the inner
2939 : * indexscan support. But note we can't really do this earlier because
2940 : * it'd break the comparisons to predicates above ... (or would it? Those
2941 : * wouldn't have outer refs)
2942 : */
2943 133958 : if (best_path->path.param_info)
2944 : {
2945 30794 : stripped_indexquals = (List *)
2946 30794 : replace_nestloop_params(root, (Node *) stripped_indexquals);
2947 : qpqual = (List *)
2948 30794 : replace_nestloop_params(root, (Node *) qpqual);
2949 : indexorderbys = (List *)
2950 30794 : replace_nestloop_params(root, (Node *) indexorderbys);
2951 : }
2952 :
2953 : /*
2954 : * If there are ORDER BY expressions, look up the sort operators for their
2955 : * result datatypes.
2956 : */
2957 133958 : if (indexorderbys)
2958 : {
2959 : ListCell *pathkeyCell,
2960 : *exprCell;
2961 :
2962 : /*
2963 : * PathKey contains OID of the btree opfamily we're sorting by, but
2964 : * that's not quite enough because we need the expression's datatype
2965 : * to look up the sort operator in the operator family.
2966 : */
2967 : Assert(list_length(best_path->path.pathkeys) == list_length(indexorderbys));
2968 581 : forboth(pathkeyCell, best_path->path.pathkeys, exprCell, indexorderbys)
2969 : {
2970 293 : PathKey *pathkey = (PathKey *) lfirst(pathkeyCell);
2971 293 : Node *expr = (Node *) lfirst(exprCell);
2972 293 : Oid exprtype = exprType(expr);
2973 : Oid sortop;
2974 :
2975 : /* Get sort operator from opfamily */
2976 293 : sortop = get_opfamily_member_for_cmptype(pathkey->pk_opfamily,
2977 : exprtype,
2978 : exprtype,
2979 : pathkey->pk_cmptype);
2980 293 : if (!OidIsValid(sortop))
2981 0 : elog(ERROR, "missing operator %d(%u,%u) in opfamily %u",
2982 : pathkey->pk_cmptype, exprtype, exprtype, pathkey->pk_opfamily);
2983 293 : indexorderbyops = lappend_oid(indexorderbyops, sortop);
2984 : }
2985 : }
2986 :
2987 : /*
2988 : * For an index-only scan, we must mark indextlist entries as resjunk if
2989 : * they are columns that the index AM can't return; this cues setrefs.c to
2990 : * not generate references to those columns.
2991 : */
2992 133958 : if (indexonly)
2993 : {
2994 13611 : int i = 0;
2995 :
2996 31320 : foreach(l, indexinfo->indextlist)
2997 : {
2998 17709 : TargetEntry *indextle = (TargetEntry *) lfirst(l);
2999 :
3000 17709 : indextle->resjunk = !indexinfo->canreturn[i];
3001 17709 : i++;
3002 : }
3003 : }
3004 :
3005 : /* Finally ready to build the plan node */
3006 133958 : if (indexonly)
3007 13611 : scan_plan = (Scan *) make_indexonlyscan(tlist,
3008 : qpqual,
3009 : baserelid,
3010 : indexoid,
3011 : fixed_indexquals,
3012 : stripped_indexquals,
3013 : fixed_indexorderbys,
3014 : indexinfo->indextlist,
3015 : best_path->indexscandir);
3016 : else
3017 120347 : scan_plan = (Scan *) make_indexscan(tlist,
3018 : qpqual,
3019 : baserelid,
3020 : indexoid,
3021 : fixed_indexquals,
3022 : stripped_indexquals,
3023 : fixed_indexorderbys,
3024 : indexorderbys,
3025 : indexorderbyops,
3026 : best_path->indexscandir);
3027 :
3028 133958 : copy_generic_path_info(&scan_plan->plan, &best_path->path);
3029 :
3030 133958 : return scan_plan;
3031 : }
3032 :
3033 : /*
3034 : * create_bitmap_scan_plan
3035 : * Returns a bitmap scan plan for the base relation scanned by 'best_path'
3036 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3037 : */
3038 : static BitmapHeapScan *
3039 18698 : create_bitmap_scan_plan(PlannerInfo *root,
3040 : BitmapHeapPath *best_path,
3041 : List *tlist,
3042 : List *scan_clauses)
3043 : {
3044 18698 : Index baserelid = best_path->path.parent->relid;
3045 : Plan *bitmapqualplan;
3046 : List *bitmapqualorig;
3047 : List *indexquals;
3048 : List *indexECs;
3049 : List *qpqual;
3050 : ListCell *l;
3051 : BitmapHeapScan *scan_plan;
3052 :
3053 : /* it should be a base rel... */
3054 : Assert(baserelid > 0);
3055 : Assert(best_path->path.parent->rtekind == RTE_RELATION);
3056 :
3057 : /* Process the bitmapqual tree into a Plan tree and qual lists */
3058 18698 : bitmapqualplan = create_bitmap_subplan(root, best_path->bitmapqual,
3059 : &bitmapqualorig, &indexquals,
3060 : &indexECs);
3061 :
3062 18698 : if (best_path->path.parallel_aware)
3063 25 : bitmap_subplan_mark_shared(bitmapqualplan);
3064 :
3065 : /*
3066 : * The qpqual list must contain all restrictions not automatically handled
3067 : * by the index, other than pseudoconstant clauses which will be handled
3068 : * by a separate gating plan node. All the predicates in the indexquals
3069 : * will be checked (either by the index itself, or by
3070 : * nodeBitmapHeapscan.c), but if there are any "special" operators
3071 : * involved then they must be added to qpqual. The upshot is that qpqual
3072 : * must contain scan_clauses minus whatever appears in indexquals.
3073 : *
3074 : * This loop is similar to the comparable code in create_indexscan_plan(),
3075 : * but with some differences because it has to compare the scan clauses to
3076 : * stripped (no RestrictInfos) indexquals. See comments there for more
3077 : * info.
3078 : *
3079 : * In normal cases simple equal() checks will be enough to spot duplicate
3080 : * clauses, so we try that first. We next see if the scan clause is
3081 : * redundant with any top-level indexqual by virtue of being generated
3082 : * from the same EC. After that, try predicate_implied_by().
3083 : *
3084 : * Unlike create_indexscan_plan(), the predicate_implied_by() test here is
3085 : * useful for getting rid of qpquals that are implied by index predicates,
3086 : * because the predicate conditions are included in the "indexquals"
3087 : * returned by create_bitmap_subplan(). Bitmap scans have to do it that
3088 : * way because predicate conditions need to be rechecked if the scan
3089 : * becomes lossy, so they have to be included in bitmapqualorig.
3090 : */
3091 18698 : qpqual = NIL;
3092 41649 : foreach(l, scan_clauses)
3093 : {
3094 22951 : RestrictInfo *rinfo = lfirst_node(RestrictInfo, l);
3095 22951 : Node *clause = (Node *) rinfo->clause;
3096 :
3097 22951 : if (rinfo->pseudoconstant)
3098 20 : continue; /* we may drop pseudoconstants here */
3099 22931 : if (list_member(indexquals, clause))
3100 18944 : continue; /* simple duplicate */
3101 3987 : if (rinfo->parent_ec && list_member_ptr(indexECs, rinfo->parent_ec))
3102 14 : continue; /* derived from same EquivalenceClass */
3103 7844 : if (!contain_mutable_functions(clause) &&
3104 3871 : predicate_implied_by(list_make1(clause), indexquals, false))
3105 686 : continue; /* provably implied by indexquals */
3106 3287 : qpqual = lappend(qpqual, rinfo);
3107 : }
3108 :
3109 : /* Sort clauses into best execution order */
3110 18698 : qpqual = order_qual_clauses(root, qpqual);
3111 :
3112 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3113 18698 : qpqual = extract_actual_clauses(qpqual, false);
3114 :
3115 : /*
3116 : * When dealing with special operators, we will at this point have
3117 : * duplicate clauses in qpqual and bitmapqualorig. We may as well drop
3118 : * 'em from bitmapqualorig, since there's no point in making the tests
3119 : * twice.
3120 : */
3121 18698 : bitmapqualorig = list_difference_ptr(bitmapqualorig, qpqual);
3122 :
3123 : /*
3124 : * We have to replace any outer-relation variables with nestloop params in
3125 : * the qpqual and bitmapqualorig expressions. (This was already done for
3126 : * expressions attached to plan nodes in the bitmapqualplan tree.)
3127 : */
3128 18698 : if (best_path->path.param_info)
3129 : {
3130 : qpqual = (List *)
3131 683 : replace_nestloop_params(root, (Node *) qpqual);
3132 683 : bitmapqualorig = (List *)
3133 683 : replace_nestloop_params(root, (Node *) bitmapqualorig);
3134 : }
3135 :
3136 : /* Finally ready to build the plan node */
3137 18698 : scan_plan = make_bitmap_heapscan(tlist,
3138 : qpqual,
3139 : bitmapqualplan,
3140 : bitmapqualorig,
3141 : baserelid);
3142 :
3143 18698 : copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
3144 :
3145 18698 : return scan_plan;
3146 : }
3147 :
3148 : /*
3149 : * Given a bitmapqual tree, generate the Plan tree that implements it
3150 : *
3151 : * As byproducts, we also return in *qual and *indexqual the qual lists
3152 : * (in implicit-AND form, without RestrictInfos) describing the original index
3153 : * conditions and the generated indexqual conditions. (These are the same in
3154 : * simple cases, but when special index operators are involved, the former
3155 : * list includes the special conditions while the latter includes the actual
3156 : * indexable conditions derived from them.) Both lists include partial-index
3157 : * predicates, because we have to recheck predicates as well as index
3158 : * conditions if the bitmap scan becomes lossy.
3159 : *
3160 : * In addition, we return a list of EquivalenceClass pointers for all the
3161 : * top-level indexquals that were possibly-redundantly derived from ECs.
3162 : * This allows removal of scan_clauses that are redundant with such quals.
3163 : * (We do not attempt to detect such redundancies for quals that are within
3164 : * OR subtrees. This could be done in a less hacky way if we returned the
3165 : * indexquals in RestrictInfo form, but that would be slower and still pretty
3166 : * messy, since we'd have to build new RestrictInfos in many cases.)
3167 : */
3168 : static Plan *
3169 19611 : create_bitmap_subplan(PlannerInfo *root, Path *bitmapqual,
3170 : List **qual, List **indexqual, List **indexECs)
3171 : {
3172 : Plan *plan;
3173 :
3174 19611 : if (IsA(bitmapqual, BitmapAndPath))
3175 : {
3176 165 : BitmapAndPath *apath = (BitmapAndPath *) bitmapqual;
3177 165 : List *subplans = NIL;
3178 165 : List *subquals = NIL;
3179 165 : List *subindexquals = NIL;
3180 165 : List *subindexECs = NIL;
3181 : ListCell *l;
3182 :
3183 : /*
3184 : * There may well be redundant quals among the subplans, since a
3185 : * top-level WHERE qual might have gotten used to form several
3186 : * different index quals. We don't try exceedingly hard to eliminate
3187 : * redundancies, but we do eliminate obvious duplicates by using
3188 : * list_concat_unique.
3189 : */
3190 495 : foreach(l, apath->bitmapquals)
3191 : {
3192 : Plan *subplan;
3193 : List *subqual;
3194 : List *subindexqual;
3195 : List *subindexEC;
3196 :
3197 330 : subplan = create_bitmap_subplan(root, (Path *) lfirst(l),
3198 : &subqual, &subindexqual,
3199 : &subindexEC);
3200 330 : subplans = lappend(subplans, subplan);
3201 330 : subquals = list_concat_unique(subquals, subqual);
3202 330 : subindexquals = list_concat_unique(subindexquals, subindexqual);
3203 : /* Duplicates in indexECs aren't worth getting rid of */
3204 330 : subindexECs = list_concat(subindexECs, subindexEC);
3205 : }
3206 165 : plan = (Plan *) make_bitmap_and(subplans);
3207 165 : plan->startup_cost = apath->path.startup_cost;
3208 165 : plan->total_cost = apath->path.total_cost;
3209 165 : plan->plan_rows =
3210 165 : clamp_row_est(apath->bitmapselectivity * apath->path.parent->tuples);
3211 165 : plan->plan_width = 0; /* meaningless */
3212 165 : plan->parallel_aware = false;
3213 165 : plan->parallel_safe = apath->path.parallel_safe;
3214 165 : *qual = subquals;
3215 165 : *indexqual = subindexquals;
3216 165 : *indexECs = subindexECs;
3217 : }
3218 19446 : else if (IsA(bitmapqual, BitmapOrPath))
3219 : {
3220 289 : BitmapOrPath *opath = (BitmapOrPath *) bitmapqual;
3221 289 : List *subplans = NIL;
3222 289 : List *subquals = NIL;
3223 289 : List *subindexquals = NIL;
3224 289 : bool const_true_subqual = false;
3225 289 : bool const_true_subindexqual = false;
3226 : ListCell *l;
3227 :
3228 : /*
3229 : * Here, we only detect qual-free subplans. A qual-free subplan would
3230 : * cause us to generate "... OR true ..." which we may as well reduce
3231 : * to just "true". We do not try to eliminate redundant subclauses
3232 : * because (a) it's not as likely as in the AND case, and (b) we might
3233 : * well be working with hundreds or even thousands of OR conditions,
3234 : * perhaps from a long IN list. The performance of list_append_unique
3235 : * would be unacceptable.
3236 : */
3237 872 : foreach(l, opath->bitmapquals)
3238 : {
3239 : Plan *subplan;
3240 : List *subqual;
3241 : List *subindexqual;
3242 : List *subindexEC;
3243 :
3244 583 : subplan = create_bitmap_subplan(root, (Path *) lfirst(l),
3245 : &subqual, &subindexqual,
3246 : &subindexEC);
3247 583 : subplans = lappend(subplans, subplan);
3248 583 : if (subqual == NIL)
3249 0 : const_true_subqual = true;
3250 583 : else if (!const_true_subqual)
3251 583 : subquals = lappend(subquals,
3252 583 : make_ands_explicit(subqual));
3253 583 : if (subindexqual == NIL)
3254 0 : const_true_subindexqual = true;
3255 583 : else if (!const_true_subindexqual)
3256 583 : subindexquals = lappend(subindexquals,
3257 583 : make_ands_explicit(subindexqual));
3258 : }
3259 :
3260 : /*
3261 : * In the presence of ScalarArrayOpExpr quals, we might have built
3262 : * BitmapOrPaths with just one subpath; don't add an OR step.
3263 : */
3264 289 : if (list_length(subplans) == 1)
3265 : {
3266 0 : plan = (Plan *) linitial(subplans);
3267 : }
3268 : else
3269 : {
3270 289 : plan = (Plan *) make_bitmap_or(subplans);
3271 289 : plan->startup_cost = opath->path.startup_cost;
3272 289 : plan->total_cost = opath->path.total_cost;
3273 289 : plan->plan_rows =
3274 289 : clamp_row_est(opath->bitmapselectivity * opath->path.parent->tuples);
3275 289 : plan->plan_width = 0; /* meaningless */
3276 289 : plan->parallel_aware = false;
3277 289 : plan->parallel_safe = opath->path.parallel_safe;
3278 : }
3279 :
3280 : /*
3281 : * If there were constant-TRUE subquals, the OR reduces to constant
3282 : * TRUE. Also, avoid generating one-element ORs, which could happen
3283 : * due to redundancy elimination or ScalarArrayOpExpr quals.
3284 : */
3285 289 : if (const_true_subqual)
3286 0 : *qual = NIL;
3287 289 : else if (list_length(subquals) <= 1)
3288 0 : *qual = subquals;
3289 : else
3290 289 : *qual = list_make1(make_orclause(subquals));
3291 289 : if (const_true_subindexqual)
3292 0 : *indexqual = NIL;
3293 289 : else if (list_length(subindexquals) <= 1)
3294 0 : *indexqual = subindexquals;
3295 : else
3296 289 : *indexqual = list_make1(make_orclause(subindexquals));
3297 289 : *indexECs = NIL;
3298 : }
3299 19157 : else if (IsA(bitmapqual, IndexPath))
3300 : {
3301 19157 : IndexPath *ipath = (IndexPath *) bitmapqual;
3302 : IndexScan *iscan;
3303 : List *subquals;
3304 : List *subindexquals;
3305 : List *subindexECs;
3306 : ListCell *l;
3307 :
3308 : /* Use the regular indexscan plan build machinery... */
3309 19157 : iscan = castNode(IndexScan,
3310 : create_indexscan_plan(root, ipath,
3311 : NIL, NIL, false));
3312 : /* then convert to a bitmap indexscan */
3313 19157 : plan = (Plan *) make_bitmap_indexscan(iscan->scan.scanrelid,
3314 : iscan->indexid,
3315 : iscan->indexqual,
3316 : iscan->indexqualorig);
3317 : /* and set its cost/width fields appropriately */
3318 19157 : plan->startup_cost = 0.0;
3319 19157 : plan->total_cost = ipath->indextotalcost;
3320 19157 : plan->plan_rows =
3321 19157 : clamp_row_est(ipath->indexselectivity * ipath->path.parent->tuples);
3322 19157 : plan->plan_width = 0; /* meaningless */
3323 19157 : plan->parallel_aware = false;
3324 19157 : plan->parallel_safe = ipath->path.parallel_safe;
3325 : /* Extract original index clauses, actual index quals, relevant ECs */
3326 19157 : subquals = NIL;
3327 19157 : subindexquals = NIL;
3328 19157 : subindexECs = NIL;
3329 39282 : foreach(l, ipath->indexclauses)
3330 : {
3331 20125 : IndexClause *iclause = (IndexClause *) lfirst(l);
3332 20125 : RestrictInfo *rinfo = iclause->rinfo;
3333 :
3334 : Assert(!rinfo->pseudoconstant);
3335 20125 : subquals = lappend(subquals, rinfo->clause);
3336 20125 : subindexquals = list_concat(subindexquals,
3337 20125 : get_actual_clauses(iclause->indexquals));
3338 20125 : if (rinfo->parent_ec)
3339 504 : subindexECs = lappend(subindexECs, rinfo->parent_ec);
3340 : }
3341 : /* We can add any index predicate conditions, too */
3342 19272 : foreach(l, ipath->indexinfo->indpred)
3343 : {
3344 115 : Expr *pred = (Expr *) lfirst(l);
3345 :
3346 : /*
3347 : * We know that the index predicate must have been implied by the
3348 : * query condition as a whole, but it may or may not be implied by
3349 : * the conditions that got pushed into the bitmapqual. Avoid
3350 : * generating redundant conditions.
3351 : */
3352 115 : if (!predicate_implied_by(list_make1(pred), subquals, false))
3353 : {
3354 90 : subquals = lappend(subquals, pred);
3355 90 : subindexquals = lappend(subindexquals, pred);
3356 : }
3357 : }
3358 19157 : *qual = subquals;
3359 19157 : *indexqual = subindexquals;
3360 19157 : *indexECs = subindexECs;
3361 : }
3362 : else
3363 : {
3364 0 : elog(ERROR, "unrecognized node type: %d", nodeTag(bitmapqual));
3365 : plan = NULL; /* keep compiler quiet */
3366 : }
3367 :
3368 19611 : return plan;
3369 : }
3370 :
3371 : /*
3372 : * create_tidscan_plan
3373 : * Returns a tidscan plan for the base relation scanned by 'best_path'
3374 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3375 : */
3376 : static TidScan *
3377 548 : create_tidscan_plan(PlannerInfo *root, TidPath *best_path,
3378 : List *tlist, List *scan_clauses)
3379 : {
3380 : TidScan *scan_plan;
3381 548 : Index scan_relid = best_path->path.parent->relid;
3382 548 : List *tidquals = best_path->tidquals;
3383 :
3384 : /* it should be a base rel... */
3385 : Assert(scan_relid > 0);
3386 : Assert(best_path->path.parent->rtekind == RTE_RELATION);
3387 :
3388 : /*
3389 : * The qpqual list must contain all restrictions not enforced by the
3390 : * tidquals list. Since tidquals has OR semantics, we have to be careful
3391 : * about matching it up to scan_clauses. It's convenient to handle the
3392 : * single-tidqual case separately from the multiple-tidqual case. In the
3393 : * single-tidqual case, we look through the scan_clauses while they are
3394 : * still in RestrictInfo form, and drop any that are redundant with the
3395 : * tidqual.
3396 : *
3397 : * In normal cases simple pointer equality checks will be enough to spot
3398 : * duplicate RestrictInfos, so we try that first.
3399 : *
3400 : * Another common case is that a scan_clauses entry is generated from the
3401 : * same EquivalenceClass as some tidqual, and is therefore redundant with
3402 : * it, though not equal.
3403 : *
3404 : * Unlike indexpaths, we don't bother with predicate_implied_by(); the
3405 : * number of cases where it could win are pretty small.
3406 : */
3407 548 : if (list_length(tidquals) == 1)
3408 : {
3409 527 : List *qpqual = NIL;
3410 : ListCell *l;
3411 :
3412 1124 : foreach(l, scan_clauses)
3413 : {
3414 597 : RestrictInfo *rinfo = lfirst_node(RestrictInfo, l);
3415 :
3416 597 : if (rinfo->pseudoconstant)
3417 0 : continue; /* we may drop pseudoconstants here */
3418 597 : if (list_member_ptr(tidquals, rinfo))
3419 527 : continue; /* simple duplicate */
3420 70 : if (is_redundant_derived_clause(rinfo, tidquals))
3421 0 : continue; /* derived from same EquivalenceClass */
3422 70 : qpqual = lappend(qpqual, rinfo);
3423 : }
3424 527 : scan_clauses = qpqual;
3425 : }
3426 :
3427 : /* Sort clauses into best execution order */
3428 548 : scan_clauses = order_qual_clauses(root, scan_clauses);
3429 :
3430 : /* Reduce RestrictInfo lists to bare expressions; ignore pseudoconstants */
3431 548 : tidquals = extract_actual_clauses(tidquals, false);
3432 548 : scan_clauses = extract_actual_clauses(scan_clauses, false);
3433 :
3434 : /*
3435 : * If we have multiple tidquals, it's more convenient to remove duplicate
3436 : * scan_clauses after stripping the RestrictInfos. In this situation,
3437 : * because the tidquals represent OR sub-clauses, they could not have come
3438 : * from EquivalenceClasses so we don't have to worry about matching up
3439 : * non-identical clauses. On the other hand, because tidpath.c will have
3440 : * extracted those sub-clauses from some OR clause and built its own list,
3441 : * we will certainly not have pointer equality to any scan clause. So
3442 : * convert the tidquals list to an explicit OR clause and see if we can
3443 : * match it via equal() to any scan clause.
3444 : */
3445 548 : if (list_length(tidquals) > 1)
3446 21 : scan_clauses = list_difference(scan_clauses,
3447 21 : list_make1(make_orclause(tidquals)));
3448 :
3449 : /* Replace any outer-relation variables with nestloop params */
3450 548 : if (best_path->path.param_info)
3451 : {
3452 : tidquals = (List *)
3453 20 : replace_nestloop_params(root, (Node *) tidquals);
3454 : scan_clauses = (List *)
3455 20 : replace_nestloop_params(root, (Node *) scan_clauses);
3456 : }
3457 :
3458 548 : scan_plan = make_tidscan(tlist,
3459 : scan_clauses,
3460 : scan_relid,
3461 : tidquals);
3462 :
3463 548 : copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
3464 :
3465 548 : return scan_plan;
3466 : }
3467 :
3468 : /*
3469 : * create_tidrangescan_plan
3470 : * Returns a tidrangescan plan for the base relation scanned by 'best_path'
3471 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3472 : */
3473 : static TidRangeScan *
3474 1668 : create_tidrangescan_plan(PlannerInfo *root, TidRangePath *best_path,
3475 : List *tlist, List *scan_clauses)
3476 : {
3477 : TidRangeScan *scan_plan;
3478 1668 : Index scan_relid = best_path->path.parent->relid;
3479 1668 : List *tidrangequals = best_path->tidrangequals;
3480 :
3481 : /* it should be a base rel... */
3482 : Assert(scan_relid > 0);
3483 : Assert(best_path->path.parent->rtekind == RTE_RELATION);
3484 :
3485 : /*
3486 : * The qpqual list must contain all restrictions not enforced by the
3487 : * tidrangequals list. tidrangequals has AND semantics, so we can simply
3488 : * remove any qual that appears in it.
3489 : */
3490 : {
3491 1668 : List *qpqual = NIL;
3492 : ListCell *l;
3493 :
3494 3375 : foreach(l, scan_clauses)
3495 : {
3496 1707 : RestrictInfo *rinfo = lfirst_node(RestrictInfo, l);
3497 :
3498 1707 : if (rinfo->pseudoconstant)
3499 0 : continue; /* we may drop pseudoconstants here */
3500 1707 : if (list_member_ptr(tidrangequals, rinfo))
3501 1707 : continue; /* simple duplicate */
3502 0 : qpqual = lappend(qpqual, rinfo);
3503 : }
3504 1668 : scan_clauses = qpqual;
3505 : }
3506 :
3507 : /* Sort clauses into best execution order */
3508 1668 : scan_clauses = order_qual_clauses(root, scan_clauses);
3509 :
3510 : /* Reduce RestrictInfo lists to bare expressions; ignore pseudoconstants */
3511 1668 : tidrangequals = extract_actual_clauses(tidrangequals, false);
3512 1668 : scan_clauses = extract_actual_clauses(scan_clauses, false);
3513 :
3514 : /* Replace any outer-relation variables with nestloop params */
3515 1668 : if (best_path->path.param_info)
3516 : {
3517 : tidrangequals = (List *)
3518 0 : replace_nestloop_params(root, (Node *) tidrangequals);
3519 : scan_clauses = (List *)
3520 0 : replace_nestloop_params(root, (Node *) scan_clauses);
3521 : }
3522 :
3523 1668 : scan_plan = make_tidrangescan(tlist,
3524 : scan_clauses,
3525 : scan_relid,
3526 : tidrangequals);
3527 :
3528 1668 : copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
3529 :
3530 1668 : return scan_plan;
3531 : }
3532 :
3533 : /*
3534 : * create_subqueryscan_plan
3535 : * Returns a subqueryscan plan for the base relation scanned by 'best_path'
3536 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3537 : */
3538 : static SubqueryScan *
3539 30197 : create_subqueryscan_plan(PlannerInfo *root, SubqueryScanPath *best_path,
3540 : List *tlist, List *scan_clauses)
3541 : {
3542 : SubqueryScan *scan_plan;
3543 30197 : RelOptInfo *rel = best_path->path.parent;
3544 30197 : Index scan_relid = rel->relid;
3545 : Plan *subplan;
3546 :
3547 : /* it should be a subquery base rel... */
3548 : Assert(scan_relid > 0);
3549 : Assert(rel->rtekind == RTE_SUBQUERY);
3550 :
3551 : /*
3552 : * Recursively create Plan from Path for subquery. Since we are entering
3553 : * a different planner context (subroot), recurse to create_plan not
3554 : * create_plan_recurse.
3555 : */
3556 30197 : subplan = create_plan(rel->subroot, best_path->subpath);
3557 :
3558 : /* Sort clauses into best execution order */
3559 30197 : scan_clauses = order_qual_clauses(root, scan_clauses);
3560 :
3561 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3562 30197 : scan_clauses = extract_actual_clauses(scan_clauses, false);
3563 :
3564 : /*
3565 : * Replace any outer-relation variables with nestloop params.
3566 : *
3567 : * We must provide nestloop params for both lateral references of the
3568 : * subquery and outer vars in the scan_clauses. It's better to assign the
3569 : * former first, because that code path requires specific param IDs, while
3570 : * replace_nestloop_params can adapt to the IDs assigned by
3571 : * process_subquery_nestloop_params. This avoids possibly duplicating
3572 : * nestloop params when the same Var is needed for both reasons.
3573 : */
3574 30197 : if (best_path->path.param_info)
3575 : {
3576 877 : process_subquery_nestloop_params(root,
3577 : rel->subplan_params);
3578 : scan_clauses = (List *)
3579 877 : replace_nestloop_params(root, (Node *) scan_clauses);
3580 : }
3581 :
3582 30197 : scan_plan = make_subqueryscan(tlist,
3583 : scan_clauses,
3584 : scan_relid,
3585 : subplan);
3586 :
3587 30197 : copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
3588 :
3589 30197 : return scan_plan;
3590 : }
3591 :
3592 : /*
3593 : * create_functionscan_plan
3594 : * Returns a functionscan plan for the base relation scanned by 'best_path'
3595 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3596 : */
3597 : static FunctionScan *
3598 35105 : create_functionscan_plan(PlannerInfo *root, Path *best_path,
3599 : List *tlist, List *scan_clauses)
3600 : {
3601 : FunctionScan *scan_plan;
3602 35105 : Index scan_relid = best_path->parent->relid;
3603 : RangeTblEntry *rte;
3604 : List *functions;
3605 :
3606 : /* it should be a function base rel... */
3607 : Assert(scan_relid > 0);
3608 35105 : rte = planner_rt_fetch(scan_relid, root);
3609 : Assert(rte->rtekind == RTE_FUNCTION);
3610 35105 : functions = rte->functions;
3611 :
3612 : /* Sort clauses into best execution order */
3613 35105 : scan_clauses = order_qual_clauses(root, scan_clauses);
3614 :
3615 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3616 35105 : scan_clauses = extract_actual_clauses(scan_clauses, false);
3617 :
3618 : /* Replace any outer-relation variables with nestloop params */
3619 35105 : if (best_path->param_info)
3620 : {
3621 : scan_clauses = (List *)
3622 4998 : replace_nestloop_params(root, (Node *) scan_clauses);
3623 : /* The function expressions could contain nestloop params, too */
3624 4998 : functions = (List *) replace_nestloop_params(root, (Node *) functions);
3625 : }
3626 :
3627 35105 : scan_plan = make_functionscan(tlist, scan_clauses, scan_relid,
3628 35105 : functions, rte->funcordinality);
3629 :
3630 35105 : copy_generic_path_info(&scan_plan->scan.plan, best_path);
3631 :
3632 35105 : return scan_plan;
3633 : }
3634 :
3635 : /*
3636 : * create_tablefuncscan_plan
3637 : * Returns a tablefuncscan plan for the base relation scanned by 'best_path'
3638 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3639 : */
3640 : static TableFuncScan *
3641 519 : create_tablefuncscan_plan(PlannerInfo *root, Path *best_path,
3642 : List *tlist, List *scan_clauses)
3643 : {
3644 : TableFuncScan *scan_plan;
3645 519 : Index scan_relid = best_path->parent->relid;
3646 : RangeTblEntry *rte;
3647 : TableFunc *tablefunc;
3648 :
3649 : /* it should be a function base rel... */
3650 : Assert(scan_relid > 0);
3651 519 : rte = planner_rt_fetch(scan_relid, root);
3652 : Assert(rte->rtekind == RTE_TABLEFUNC);
3653 519 : tablefunc = rte->tablefunc;
3654 :
3655 : /* Sort clauses into best execution order */
3656 519 : scan_clauses = order_qual_clauses(root, scan_clauses);
3657 :
3658 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3659 519 : scan_clauses = extract_actual_clauses(scan_clauses, false);
3660 :
3661 : /* Replace any outer-relation variables with nestloop params */
3662 519 : if (best_path->param_info)
3663 : {
3664 : scan_clauses = (List *)
3665 195 : replace_nestloop_params(root, (Node *) scan_clauses);
3666 : /* The function expressions could contain nestloop params, too */
3667 195 : tablefunc = (TableFunc *) replace_nestloop_params(root, (Node *) tablefunc);
3668 : }
3669 :
3670 519 : scan_plan = make_tablefuncscan(tlist, scan_clauses, scan_relid,
3671 : tablefunc);
3672 :
3673 519 : copy_generic_path_info(&scan_plan->scan.plan, best_path);
3674 :
3675 519 : return scan_plan;
3676 : }
3677 :
3678 : /*
3679 : * create_valuesscan_plan
3680 : * Returns a valuesscan plan for the base relation scanned by 'best_path'
3681 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3682 : */
3683 : static ValuesScan *
3684 6686 : create_valuesscan_plan(PlannerInfo *root, Path *best_path,
3685 : List *tlist, List *scan_clauses)
3686 : {
3687 : ValuesScan *scan_plan;
3688 6686 : Index scan_relid = best_path->parent->relid;
3689 : RangeTblEntry *rte;
3690 : List *values_lists;
3691 :
3692 : /* it should be a values base rel... */
3693 : Assert(scan_relid > 0);
3694 6686 : rte = planner_rt_fetch(scan_relid, root);
3695 : Assert(rte->rtekind == RTE_VALUES);
3696 6686 : values_lists = rte->values_lists;
3697 :
3698 : /* Sort clauses into best execution order */
3699 6686 : scan_clauses = order_qual_clauses(root, scan_clauses);
3700 :
3701 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3702 6686 : scan_clauses = extract_actual_clauses(scan_clauses, false);
3703 :
3704 : /* Replace any outer-relation variables with nestloop params */
3705 6686 : if (best_path->param_info)
3706 : {
3707 : scan_clauses = (List *)
3708 55 : replace_nestloop_params(root, (Node *) scan_clauses);
3709 : /* The values lists could contain nestloop params, too */
3710 : values_lists = (List *)
3711 55 : replace_nestloop_params(root, (Node *) values_lists);
3712 : }
3713 :
3714 6686 : scan_plan = make_valuesscan(tlist, scan_clauses, scan_relid,
3715 : values_lists);
3716 :
3717 6686 : copy_generic_path_info(&scan_plan->scan.plan, best_path);
3718 :
3719 6686 : return scan_plan;
3720 : }
3721 :
3722 : /*
3723 : * create_ctescan_plan
3724 : * Returns a ctescan plan for the base relation scanned by 'best_path'
3725 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3726 : */
3727 : static CteScan *
3728 2913 : create_ctescan_plan(PlannerInfo *root, Path *best_path,
3729 : List *tlist, List *scan_clauses)
3730 : {
3731 : CteScan *scan_plan;
3732 2913 : Index scan_relid = best_path->parent->relid;
3733 : RangeTblEntry *rte;
3734 2913 : SubPlan *ctesplan = NULL;
3735 : int plan_id;
3736 : int cte_param_id;
3737 : PlannerInfo *cteroot;
3738 : Index levelsup;
3739 : int ndx;
3740 : ListCell *lc;
3741 :
3742 : Assert(scan_relid > 0);
3743 2913 : rte = planner_rt_fetch(scan_relid, root);
3744 : Assert(rte->rtekind == RTE_CTE);
3745 : Assert(!rte->self_reference);
3746 :
3747 : /*
3748 : * Find the referenced CTE, and locate the SubPlan previously made for it.
3749 : */
3750 2913 : levelsup = rte->ctelevelsup;
3751 2913 : cteroot = root;
3752 4968 : while (levelsup-- > 0)
3753 : {
3754 2055 : cteroot = cteroot->parent_root;
3755 2055 : if (!cteroot) /* shouldn't happen */
3756 0 : elog(ERROR, "bad levelsup for CTE \"%s\"", rte->ctename);
3757 : }
3758 :
3759 : /*
3760 : * Note: cte_plan_ids can be shorter than cteList, if we are still working
3761 : * on planning the CTEs (ie, this is a side-reference from another CTE).
3762 : * So we mustn't use forboth here.
3763 : */
3764 2913 : ndx = 0;
3765 3861 : foreach(lc, cteroot->parse->cteList)
3766 : {
3767 3861 : CommonTableExpr *cte = (CommonTableExpr *) lfirst(lc);
3768 :
3769 3861 : if (strcmp(cte->ctename, rte->ctename) == 0)
3770 2913 : break;
3771 948 : ndx++;
3772 : }
3773 2913 : if (lc == NULL) /* shouldn't happen */
3774 0 : elog(ERROR, "could not find CTE \"%s\"", rte->ctename);
3775 2913 : if (ndx >= list_length(cteroot->cte_plan_ids))
3776 0 : elog(ERROR, "could not find plan for CTE \"%s\"", rte->ctename);
3777 2913 : plan_id = list_nth_int(cteroot->cte_plan_ids, ndx);
3778 2913 : if (plan_id <= 0)
3779 0 : elog(ERROR, "no plan was made for CTE \"%s\"", rte->ctename);
3780 3440 : foreach(lc, cteroot->init_plans)
3781 : {
3782 3440 : ctesplan = (SubPlan *) lfirst(lc);
3783 3440 : if (ctesplan->plan_id == plan_id)
3784 2913 : break;
3785 : }
3786 2913 : if (lc == NULL) /* shouldn't happen */
3787 0 : elog(ERROR, "could not find plan for CTE \"%s\"", rte->ctename);
3788 :
3789 : /*
3790 : * We need the CTE param ID, which is the sole member of the SubPlan's
3791 : * setParam list.
3792 : */
3793 2913 : cte_param_id = linitial_int(ctesplan->setParam);
3794 :
3795 : /* Sort clauses into best execution order */
3796 2913 : scan_clauses = order_qual_clauses(root, scan_clauses);
3797 :
3798 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3799 2913 : scan_clauses = extract_actual_clauses(scan_clauses, false);
3800 :
3801 : /* Replace any outer-relation variables with nestloop params */
3802 2913 : if (best_path->param_info)
3803 : {
3804 : scan_clauses = (List *)
3805 0 : replace_nestloop_params(root, (Node *) scan_clauses);
3806 : }
3807 :
3808 2913 : scan_plan = make_ctescan(tlist, scan_clauses, scan_relid,
3809 : plan_id, cte_param_id);
3810 :
3811 2913 : copy_generic_path_info(&scan_plan->scan.plan, best_path);
3812 :
3813 2913 : return scan_plan;
3814 : }
3815 :
3816 : /*
3817 : * create_namedtuplestorescan_plan
3818 : * Returns a tuplestorescan plan for the base relation scanned by
3819 : * 'best_path' with restriction clauses 'scan_clauses' and targetlist
3820 : * 'tlist'.
3821 : */
3822 : static NamedTuplestoreScan *
3823 391 : create_namedtuplestorescan_plan(PlannerInfo *root, Path *best_path,
3824 : List *tlist, List *scan_clauses)
3825 : {
3826 : NamedTuplestoreScan *scan_plan;
3827 391 : Index scan_relid = best_path->parent->relid;
3828 : RangeTblEntry *rte;
3829 :
3830 : Assert(scan_relid > 0);
3831 391 : rte = planner_rt_fetch(scan_relid, root);
3832 : Assert(rte->rtekind == RTE_NAMEDTUPLESTORE);
3833 :
3834 : /* Sort clauses into best execution order */
3835 391 : scan_clauses = order_qual_clauses(root, scan_clauses);
3836 :
3837 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3838 391 : scan_clauses = extract_actual_clauses(scan_clauses, false);
3839 :
3840 : /* Replace any outer-relation variables with nestloop params */
3841 391 : if (best_path->param_info)
3842 : {
3843 : scan_clauses = (List *)
3844 0 : replace_nestloop_params(root, (Node *) scan_clauses);
3845 : }
3846 :
3847 391 : scan_plan = make_namedtuplestorescan(tlist, scan_clauses, scan_relid,
3848 : rte->enrname);
3849 :
3850 391 : copy_generic_path_info(&scan_plan->scan.plan, best_path);
3851 :
3852 391 : return scan_plan;
3853 : }
3854 :
3855 : /*
3856 : * create_resultscan_plan
3857 : * Returns a Result plan for the RTE_RESULT base relation scanned by
3858 : * 'best_path' with restriction clauses 'scan_clauses' and targetlist
3859 : * 'tlist'.
3860 : */
3861 : static Result *
3862 3440 : create_resultscan_plan(PlannerInfo *root, Path *best_path,
3863 : List *tlist, List *scan_clauses)
3864 : {
3865 : Result *scan_plan;
3866 3440 : Index scan_relid = best_path->parent->relid;
3867 : RangeTblEntry *rte PG_USED_FOR_ASSERTS_ONLY;
3868 :
3869 : Assert(scan_relid > 0);
3870 3440 : rte = planner_rt_fetch(scan_relid, root);
3871 : Assert(rte->rtekind == RTE_RESULT);
3872 :
3873 : /* Sort clauses into best execution order */
3874 3440 : scan_clauses = order_qual_clauses(root, scan_clauses);
3875 :
3876 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3877 3440 : scan_clauses = extract_actual_clauses(scan_clauses, false);
3878 :
3879 : /* Replace any outer-relation variables with nestloop params */
3880 3440 : if (best_path->param_info)
3881 : {
3882 : scan_clauses = (List *)
3883 135 : replace_nestloop_params(root, (Node *) scan_clauses);
3884 : }
3885 :
3886 3440 : scan_plan = make_one_row_result(tlist, (Node *) scan_clauses,
3887 : best_path->parent);
3888 :
3889 3440 : copy_generic_path_info(&scan_plan->plan, best_path);
3890 :
3891 3440 : return scan_plan;
3892 : }
3893 :
3894 : /*
3895 : * create_worktablescan_plan
3896 : * Returns a worktablescan plan for the base relation scanned by 'best_path'
3897 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3898 : */
3899 : static WorkTableScan *
3900 686 : create_worktablescan_plan(PlannerInfo *root, Path *best_path,
3901 : List *tlist, List *scan_clauses)
3902 : {
3903 : WorkTableScan *scan_plan;
3904 686 : Index scan_relid = best_path->parent->relid;
3905 : RangeTblEntry *rte;
3906 : Index levelsup;
3907 : PlannerInfo *cteroot;
3908 :
3909 : Assert(scan_relid > 0);
3910 686 : rte = planner_rt_fetch(scan_relid, root);
3911 : Assert(rte->rtekind == RTE_CTE);
3912 : Assert(rte->self_reference);
3913 :
3914 : /*
3915 : * We need to find the worktable param ID, which is in the plan level
3916 : * that's processing the recursive UNION, which is one level *below* where
3917 : * the CTE comes from.
3918 : */
3919 686 : levelsup = rte->ctelevelsup;
3920 686 : if (levelsup == 0) /* shouldn't happen */
3921 0 : elog(ERROR, "bad levelsup for CTE \"%s\"", rte->ctename);
3922 686 : levelsup--;
3923 686 : cteroot = root;
3924 1614 : while (levelsup-- > 0)
3925 : {
3926 928 : cteroot = cteroot->parent_root;
3927 928 : if (!cteroot) /* shouldn't happen */
3928 0 : elog(ERROR, "bad levelsup for CTE \"%s\"", rte->ctename);
3929 : }
3930 686 : if (cteroot->wt_param_id < 0) /* shouldn't happen */
3931 0 : elog(ERROR, "could not find param ID for CTE \"%s\"", rte->ctename);
3932 :
3933 : /* Sort clauses into best execution order */
3934 686 : scan_clauses = order_qual_clauses(root, scan_clauses);
3935 :
3936 : /* Reduce RestrictInfo list to bare expressions; ignore pseudoconstants */
3937 686 : scan_clauses = extract_actual_clauses(scan_clauses, false);
3938 :
3939 : /* Replace any outer-relation variables with nestloop params */
3940 686 : if (best_path->param_info)
3941 : {
3942 : scan_clauses = (List *)
3943 0 : replace_nestloop_params(root, (Node *) scan_clauses);
3944 : }
3945 :
3946 686 : scan_plan = make_worktablescan(tlist, scan_clauses, scan_relid,
3947 : cteroot->wt_param_id);
3948 :
3949 686 : copy_generic_path_info(&scan_plan->scan.plan, best_path);
3950 :
3951 686 : return scan_plan;
3952 : }
3953 :
3954 : /*
3955 : * create_foreignscan_plan
3956 : * Returns a foreignscan plan for the relation scanned by 'best_path'
3957 : * with restriction clauses 'scan_clauses' and targetlist 'tlist'.
3958 : */
3959 : static ForeignScan *
3960 1048 : create_foreignscan_plan(PlannerInfo *root, ForeignPath *best_path,
3961 : List *tlist, List *scan_clauses)
3962 : {
3963 : ForeignScan *scan_plan;
3964 1048 : RelOptInfo *rel = best_path->path.parent;
3965 1048 : Index scan_relid = rel->relid;
3966 1048 : Oid rel_oid = InvalidOid;
3967 1048 : Plan *outer_plan = NULL;
3968 :
3969 : Assert(rel->fdwroutine != NULL);
3970 :
3971 : /* transform the child path if any */
3972 1048 : if (best_path->fdw_outerpath)
3973 26 : outer_plan = create_plan_recurse(root, best_path->fdw_outerpath,
3974 : CP_EXACT_TLIST);
3975 :
3976 : /*
3977 : * If we're scanning a base relation, fetch its OID. (Irrelevant if
3978 : * scanning a join relation.)
3979 : */
3980 1048 : if (scan_relid > 0)
3981 : {
3982 : RangeTblEntry *rte;
3983 :
3984 : Assert(rel->rtekind == RTE_RELATION);
3985 761 : rte = planner_rt_fetch(scan_relid, root);
3986 : Assert(rte->rtekind == RTE_RELATION);
3987 761 : rel_oid = rte->relid;
3988 : }
3989 :
3990 : /*
3991 : * Sort clauses into best execution order. We do this first since the FDW
3992 : * might have more info than we do and wish to adjust the ordering.
3993 : */
3994 1048 : scan_clauses = order_qual_clauses(root, scan_clauses);
3995 :
3996 : /*
3997 : * Let the FDW perform its processing on the restriction clauses and
3998 : * generate the plan node. Note that the FDW might remove restriction
3999 : * clauses that it intends to execute remotely, or even add more (if it
4000 : * has selected some join clauses for remote use but also wants them
4001 : * rechecked locally).
4002 : */
4003 1048 : scan_plan = rel->fdwroutine->GetForeignPlan(root, rel, rel_oid,
4004 : best_path,
4005 : tlist, scan_clauses,
4006 : outer_plan);
4007 :
4008 : /* Copy cost data from Path to Plan; no need to make FDW do this */
4009 1048 : copy_generic_path_info(&scan_plan->scan.plan, &best_path->path);
4010 :
4011 : /* Copy user OID to access as; likewise no need to make FDW do this */
4012 1048 : scan_plan->checkAsUser = rel->userid;
4013 :
4014 : /* Copy foreign server OID; likewise, no need to make FDW do this */
4015 1048 : scan_plan->fs_server = rel->serverid;
4016 :
4017 : /*
4018 : * Likewise, copy the relids that are represented by this foreign scan. An
4019 : * upper rel doesn't have relids set, but it covers all the relations
4020 : * participating in the underlying scan/join, so use root->all_query_rels.
4021 : */
4022 1048 : if (rel->reloptkind == RELOPT_UPPER_REL)
4023 122 : scan_plan->fs_relids = root->all_query_rels;
4024 : else
4025 926 : scan_plan->fs_relids = best_path->path.parent->relids;
4026 :
4027 : /*
4028 : * Join relid sets include relevant outer joins, but FDWs may need to know
4029 : * which are the included base rels. That's a bit tedious to get without
4030 : * access to the plan-time data structures, so compute it here.
4031 : */
4032 2096 : scan_plan->fs_base_relids = bms_difference(scan_plan->fs_relids,
4033 1048 : root->outer_join_rels);
4034 :
4035 : /*
4036 : * If this is a foreign join, and to make it valid to push down we had to
4037 : * assume that the current user is the same as some user explicitly named
4038 : * in the query, mark the finished plan as depending on the current user.
4039 : */
4040 1048 : if (rel->useridiscurrent)
4041 2 : root->glob->dependsOnRole = true;
4042 :
4043 : /*
4044 : * Replace any outer-relation variables with nestloop params in the qual,
4045 : * fdw_exprs and fdw_recheck_quals expressions. We do this last so that
4046 : * the FDW doesn't have to be involved. (Note that parts of fdw_exprs or
4047 : * fdw_recheck_quals could have come from join clauses, so doing this
4048 : * beforehand on the scan_clauses wouldn't work.) We assume
4049 : * fdw_scan_tlist contains no such variables.
4050 : */
4051 1048 : if (best_path->path.param_info)
4052 : {
4053 15 : scan_plan->scan.plan.qual = (List *)
4054 15 : replace_nestloop_params(root, (Node *) scan_plan->scan.plan.qual);
4055 15 : scan_plan->fdw_exprs = (List *)
4056 15 : replace_nestloop_params(root, (Node *) scan_plan->fdw_exprs);
4057 15 : scan_plan->fdw_recheck_quals = (List *)
4058 15 : replace_nestloop_params(root,
4059 15 : (Node *) scan_plan->fdw_recheck_quals);
4060 : }
4061 :
4062 : /*
4063 : * If rel is a base relation, detect whether any system columns are
4064 : * requested from the rel. (If rel is a join relation, rel->relid will be
4065 : * 0, but there can be no Var with relid 0 in the rel's targetlist or the
4066 : * restriction clauses, so we skip this in that case. Note that any such
4067 : * columns in base relations that were joined are assumed to be contained
4068 : * in fdw_scan_tlist.) This is a bit of a kluge and might go away
4069 : * someday, so we intentionally leave it out of the API presented to FDWs.
4070 : */
4071 1048 : scan_plan->fsSystemCol = false;
4072 1048 : if (scan_relid > 0)
4073 : {
4074 761 : Bitmapset *attrs_used = NULL;
4075 : ListCell *lc;
4076 : int i;
4077 :
4078 : /*
4079 : * First, examine all the attributes needed for joins or final output.
4080 : * Note: we must look at rel's targetlist, not the attr_needed data,
4081 : * because attr_needed isn't computed for inheritance child rels.
4082 : */
4083 761 : pull_varattnos((Node *) rel->reltarget->exprs, scan_relid, &attrs_used);
4084 :
4085 : /* Add all the attributes used by restriction clauses. */
4086 1115 : foreach(lc, rel->baserestrictinfo)
4087 : {
4088 354 : RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
4089 :
4090 354 : pull_varattnos((Node *) rinfo->clause, scan_relid, &attrs_used);
4091 : }
4092 :
4093 : /* Now, are any system columns requested from rel? */
4094 4306 : for (i = FirstLowInvalidHeapAttributeNumber + 1; i < 0; i++)
4095 : {
4096 3816 : if (bms_is_member(i - FirstLowInvalidHeapAttributeNumber, attrs_used))
4097 : {
4098 271 : scan_plan->fsSystemCol = true;
4099 271 : break;
4100 : }
4101 : }
4102 :
4103 761 : bms_free(attrs_used);
4104 : }
4105 :
4106 1048 : return scan_plan;
4107 : }
4108 :
4109 : /*
4110 : * create_customscan_plan
4111 : *
4112 : * Transform a CustomPath into a Plan.
4113 : */
4114 : static CustomScan *
4115 0 : create_customscan_plan(PlannerInfo *root, CustomPath *best_path,
4116 : List *tlist, List *scan_clauses)
4117 : {
4118 : CustomScan *cplan;
4119 0 : RelOptInfo *rel = best_path->path.parent;
4120 0 : List *custom_plans = NIL;
4121 : ListCell *lc;
4122 :
4123 : /* Recursively transform child paths. */
4124 0 : foreach(lc, best_path->custom_paths)
4125 : {
4126 0 : Plan *plan = create_plan_recurse(root, (Path *) lfirst(lc),
4127 : CP_EXACT_TLIST);
4128 :
4129 0 : custom_plans = lappend(custom_plans, plan);
4130 : }
4131 :
4132 : /*
4133 : * Sort clauses into the best execution order, although custom-scan
4134 : * provider can reorder them again.
4135 : */
4136 0 : scan_clauses = order_qual_clauses(root, scan_clauses);
4137 :
4138 : /*
4139 : * Invoke custom plan provider to create the Plan node represented by the
4140 : * CustomPath.
4141 : */
4142 0 : cplan = castNode(CustomScan,
4143 : best_path->methods->PlanCustomPath(root,
4144 : rel,
4145 : best_path,
4146 : tlist,
4147 : scan_clauses,
4148 : custom_plans));
4149 :
4150 : /*
4151 : * Copy cost data from Path to Plan; no need to make custom-plan providers
4152 : * do this
4153 : */
4154 0 : copy_generic_path_info(&cplan->scan.plan, &best_path->path);
4155 :
4156 : /* Likewise, copy the relids that are represented by this custom scan */
4157 0 : cplan->custom_relids = best_path->path.parent->relids;
4158 :
4159 : /*
4160 : * Replace any outer-relation variables with nestloop params in the qual
4161 : * and custom_exprs expressions. We do this last so that the custom-plan
4162 : * provider doesn't have to be involved. (Note that parts of custom_exprs
4163 : * could have come from join clauses, so doing this beforehand on the
4164 : * scan_clauses wouldn't work.) We assume custom_scan_tlist contains no
4165 : * such variables.
4166 : */
4167 0 : if (best_path->path.param_info)
4168 : {
4169 0 : cplan->scan.plan.qual = (List *)
4170 0 : replace_nestloop_params(root, (Node *) cplan->scan.plan.qual);
4171 0 : cplan->custom_exprs = (List *)
4172 0 : replace_nestloop_params(root, (Node *) cplan->custom_exprs);
4173 : }
4174 :
4175 0 : return cplan;
4176 : }
4177 :
4178 :
4179 : /*****************************************************************************
4180 : *
4181 : * JOIN METHODS
4182 : *
4183 : *****************************************************************************/
4184 :
4185 : static NestLoop *
4186 76730 : create_nestloop_plan(PlannerInfo *root,
4187 : NestPath *best_path)
4188 : {
4189 : NestLoop *join_plan;
4190 : Plan *outer_plan;
4191 : Plan *inner_plan;
4192 : Relids outerrelids;
4193 76730 : List *tlist = build_path_tlist(root, &best_path->jpath.path);
4194 76730 : List *joinrestrictclauses = best_path->jpath.joinrestrictinfo;
4195 : List *joinclauses;
4196 : List *otherclauses;
4197 : List *nestParams;
4198 : List *outer_tlist;
4199 : bool outer_parallel_safe;
4200 76730 : Relids saveOuterRels = root->curOuterRels;
4201 : ListCell *lc;
4202 :
4203 : /*
4204 : * If the inner path is parameterized by the topmost parent of the outer
4205 : * rel rather than the outer rel itself, fix that. (Nothing happens here
4206 : * if it is not so parameterized.)
4207 : */
4208 76730 : best_path->jpath.innerjoinpath =
4209 76730 : reparameterize_path_by_child(root,
4210 : best_path->jpath.innerjoinpath,
4211 76730 : best_path->jpath.outerjoinpath->parent);
4212 :
4213 : /*
4214 : * Failure here probably means that reparameterize_path_by_child() is not
4215 : * in sync with path_is_reparameterizable_by_child().
4216 : */
4217 : Assert(best_path->jpath.innerjoinpath != NULL);
4218 :
4219 : /* NestLoop can project, so no need to be picky about child tlists */
4220 76730 : outer_plan = create_plan_recurse(root, best_path->jpath.outerjoinpath, 0);
4221 :
4222 : /* For a nestloop, include outer relids in curOuterRels for inner side */
4223 76730 : outerrelids = best_path->jpath.outerjoinpath->parent->relids;
4224 76730 : root->curOuterRels = bms_union(root->curOuterRels, outerrelids);
4225 :
4226 76730 : inner_plan = create_plan_recurse(root, best_path->jpath.innerjoinpath, 0);
4227 :
4228 : /* Restore curOuterRels */
4229 76730 : bms_free(root->curOuterRels);
4230 76730 : root->curOuterRels = saveOuterRels;
4231 :
4232 : /* Sort join qual clauses into best execution order */
4233 76730 : joinrestrictclauses = order_qual_clauses(root, joinrestrictclauses);
4234 :
4235 : /* Get the join qual clauses (in plain expression form) */
4236 : /* Any pseudoconstant clauses are ignored here */
4237 76730 : if (IS_OUTER_JOIN(best_path->jpath.jointype))
4238 : {
4239 18439 : extract_actual_join_clauses(joinrestrictclauses,
4240 18439 : best_path->jpath.path.parent->relids,
4241 : &joinclauses, &otherclauses);
4242 : }
4243 : else
4244 : {
4245 : /* We can treat all clauses alike for an inner join */
4246 58291 : joinclauses = extract_actual_clauses(joinrestrictclauses, false);
4247 58291 : otherclauses = NIL;
4248 : }
4249 :
4250 : /* Replace any outer-relation variables with nestloop params */
4251 76730 : if (best_path->jpath.path.param_info)
4252 : {
4253 844 : joinclauses = (List *)
4254 844 : replace_nestloop_params(root, (Node *) joinclauses);
4255 844 : otherclauses = (List *)
4256 844 : replace_nestloop_params(root, (Node *) otherclauses);
4257 : }
4258 :
4259 : /*
4260 : * Identify any nestloop parameters that should be supplied by this join
4261 : * node, and remove them from root->curOuterParams.
4262 : */
4263 76730 : nestParams = identify_current_nestloop_params(root,
4264 : outerrelids,
4265 76730 : PATH_REQ_OUTER((Path *) best_path));
4266 :
4267 : /*
4268 : * While nestloop parameters that are Vars had better be available from
4269 : * the outer_plan already, there are edge cases where nestloop parameters
4270 : * that are PHVs won't be. In such cases we must add them to the
4271 : * outer_plan's tlist, since the executor's NestLoopParam machinery
4272 : * requires the params to be simple outer-Var references to that tlist.
4273 : * (This is cheating a little bit, because the outer path's required-outer
4274 : * relids might not be enough to allow evaluating such a PHV. But in
4275 : * practice, if we could have evaluated the PHV at the nestloop node, we
4276 : * can do so in the outer plan too.)
4277 : */
4278 76730 : outer_tlist = outer_plan->targetlist;
4279 76730 : outer_parallel_safe = outer_plan->parallel_safe;
4280 119970 : foreach(lc, nestParams)
4281 : {
4282 43240 : NestLoopParam *nlp = (NestLoopParam *) lfirst(lc);
4283 : PlaceHolderVar *phv;
4284 : TargetEntry *tle;
4285 :
4286 43240 : if (IsA(nlp->paramval, Var))
4287 43030 : continue; /* nothing to do for simple Vars */
4288 : /* Otherwise it must be a PHV */
4289 210 : phv = castNode(PlaceHolderVar, nlp->paramval);
4290 :
4291 210 : if (tlist_member((Expr *) phv, outer_tlist))
4292 185 : continue; /* already available */
4293 :
4294 : /*
4295 : * It's possible that nestloop parameter PHVs selected to evaluate
4296 : * here contain references to surviving root->curOuterParams items
4297 : * (that is, they reference values that will be supplied by some
4298 : * higher-level nestloop). Those need to be converted to Params now.
4299 : * Note: it's safe to do this after the tlist_member() check, because
4300 : * equal() won't pay attention to phv->phexpr.
4301 : */
4302 50 : phv->phexpr = (Expr *) replace_nestloop_params(root,
4303 25 : (Node *) phv->phexpr);
4304 :
4305 : /* Make a shallow copy of outer_tlist, if we didn't already */
4306 25 : if (outer_tlist == outer_plan->targetlist)
4307 25 : outer_tlist = list_copy(outer_tlist);
4308 : /* ... and add the needed expression */
4309 25 : tle = makeTargetEntry((Expr *) copyObject(phv),
4310 25 : list_length(outer_tlist) + 1,
4311 : NULL,
4312 : true);
4313 25 : outer_tlist = lappend(outer_tlist, tle);
4314 : /* ... and track whether tlist is (still) parallel-safe */
4315 25 : if (outer_parallel_safe)
4316 5 : outer_parallel_safe = is_parallel_safe(root, (Node *) phv);
4317 : }
4318 76730 : if (outer_tlist != outer_plan->targetlist)
4319 25 : outer_plan = change_plan_targetlist(outer_plan, outer_tlist,
4320 : outer_parallel_safe);
4321 :
4322 : /* And finally, we can build the join plan node */
4323 76730 : join_plan = make_nestloop(tlist,
4324 : joinclauses,
4325 : otherclauses,
4326 : nestParams,
4327 : outer_plan,
4328 : inner_plan,
4329 : best_path->jpath.jointype,
4330 76730 : best_path->jpath.inner_unique);
4331 :
4332 76730 : copy_generic_path_info(&join_plan->join.plan, &best_path->jpath.path);
4333 :
4334 76730 : return join_plan;
4335 : }
4336 :
4337 : static MergeJoin *
4338 5523 : create_mergejoin_plan(PlannerInfo *root,
4339 : MergePath *best_path)
4340 : {
4341 : MergeJoin *join_plan;
4342 : Plan *outer_plan;
4343 : Plan *inner_plan;
4344 5523 : List *tlist = build_path_tlist(root, &best_path->jpath.path);
4345 : List *joinclauses;
4346 : List *otherclauses;
4347 : List *mergeclauses;
4348 : List *outerpathkeys;
4349 : List *innerpathkeys;
4350 : int nClauses;
4351 : Oid *mergefamilies;
4352 : Oid *mergecollations;
4353 : bool *mergereversals;
4354 : bool *mergenullsfirst;
4355 : PathKey *opathkey;
4356 : EquivalenceClass *opeclass;
4357 : int i;
4358 : ListCell *lc;
4359 : ListCell *lop;
4360 : ListCell *lip;
4361 5523 : Path *outer_path = best_path->jpath.outerjoinpath;
4362 5523 : Path *inner_path = best_path->jpath.innerjoinpath;
4363 :
4364 : /*
4365 : * MergeJoin can project, so we don't have to demand exact tlists from the
4366 : * inputs. However, if we're intending to sort an input's result, it's
4367 : * best to request a small tlist so we aren't sorting more data than
4368 : * necessary.
4369 : */
4370 5523 : outer_plan = create_plan_recurse(root, best_path->jpath.outerjoinpath,
4371 5523 : (best_path->outersortkeys != NIL) ? CP_SMALL_TLIST : 0);
4372 :
4373 5523 : inner_plan = create_plan_recurse(root, best_path->jpath.innerjoinpath,
4374 5523 : (best_path->innersortkeys != NIL) ? CP_SMALL_TLIST : 0);
4375 :
4376 : /* Sort join qual clauses into best execution order */
4377 : /* NB: do NOT reorder the mergeclauses */
4378 5523 : joinclauses = order_qual_clauses(root, best_path->jpath.joinrestrictinfo);
4379 :
4380 : /* Get the join qual clauses (in plain expression form) */
4381 : /* Any pseudoconstant clauses are ignored here */
4382 5523 : if (IS_OUTER_JOIN(best_path->jpath.jointype))
4383 : {
4384 3394 : extract_actual_join_clauses(joinclauses,
4385 3394 : best_path->jpath.path.parent->relids,
4386 : &joinclauses, &otherclauses);
4387 : }
4388 : else
4389 : {
4390 : /* We can treat all clauses alike for an inner join */
4391 2129 : joinclauses = extract_actual_clauses(joinclauses, false);
4392 2129 : otherclauses = NIL;
4393 : }
4394 :
4395 : /*
4396 : * Remove the mergeclauses from the list of join qual clauses, leaving the
4397 : * list of quals that must be checked as qpquals.
4398 : */
4399 5523 : mergeclauses = get_actual_clauses(best_path->path_mergeclauses);
4400 5523 : joinclauses = list_difference(joinclauses, mergeclauses);
4401 :
4402 : /*
4403 : * Replace any outer-relation variables with nestloop params. There
4404 : * should not be any in the mergeclauses.
4405 : */
4406 5523 : if (best_path->jpath.path.param_info)
4407 : {
4408 5 : joinclauses = (List *)
4409 5 : replace_nestloop_params(root, (Node *) joinclauses);
4410 5 : otherclauses = (List *)
4411 5 : replace_nestloop_params(root, (Node *) otherclauses);
4412 : }
4413 :
4414 : /*
4415 : * Rearrange mergeclauses, if needed, so that the outer variable is always
4416 : * on the left; mark the mergeclause restrictinfos with correct
4417 : * outer_is_left status.
4418 : */
4419 5523 : mergeclauses = get_switched_clauses(best_path->path_mergeclauses,
4420 5523 : best_path->jpath.outerjoinpath->parent->relids);
4421 :
4422 : /*
4423 : * Create explicit sort nodes for the outer and inner paths if necessary.
4424 : */
4425 5523 : if (best_path->outersortkeys)
4426 : {
4427 2731 : Relids outer_relids = outer_path->parent->relids;
4428 : Plan *sort_plan;
4429 :
4430 : /*
4431 : * We can assert that the outer path is not already ordered
4432 : * appropriately for the mergejoin; otherwise, outersortkeys would
4433 : * have been set to NIL.
4434 : */
4435 : Assert(!pathkeys_contained_in(best_path->outersortkeys,
4436 : outer_path->pathkeys));
4437 :
4438 : /*
4439 : * We choose to use incremental sort if it is enabled and there are
4440 : * presorted keys; otherwise we use full sort.
4441 : */
4442 2731 : if (enable_incremental_sort && best_path->outer_presorted_keys > 0)
4443 : {
4444 : sort_plan = (Plan *)
4445 10 : make_incrementalsort_from_pathkeys(outer_plan,
4446 : best_path->outersortkeys,
4447 : outer_relids,
4448 : best_path->outer_presorted_keys);
4449 :
4450 10 : label_incrementalsort_with_costsize(root,
4451 : (IncrementalSort *) sort_plan,
4452 : best_path->outersortkeys,
4453 : -1.0);
4454 : }
4455 : else
4456 : {
4457 : sort_plan = (Plan *)
4458 2721 : make_sort_from_pathkeys(outer_plan,
4459 : best_path->outersortkeys,
4460 : outer_relids);
4461 :
4462 2721 : label_sort_with_costsize(root, (Sort *) sort_plan, -1.0);
4463 : }
4464 :
4465 2731 : outer_plan = sort_plan;
4466 2731 : outerpathkeys = best_path->outersortkeys;
4467 : }
4468 : else
4469 2792 : outerpathkeys = best_path->jpath.outerjoinpath->pathkeys;
4470 :
4471 5523 : if (best_path->innersortkeys)
4472 : {
4473 : /*
4474 : * We do not consider incremental sort for inner path, because
4475 : * incremental sort does not support mark/restore.
4476 : */
4477 :
4478 5082 : Relids inner_relids = inner_path->parent->relids;
4479 : Sort *sort;
4480 :
4481 : /*
4482 : * We can assert that the inner path is not already ordered
4483 : * appropriately for the mergejoin; otherwise, innersortkeys would
4484 : * have been set to NIL.
4485 : */
4486 : Assert(!pathkeys_contained_in(best_path->innersortkeys,
4487 : inner_path->pathkeys));
4488 :
4489 5082 : sort = make_sort_from_pathkeys(inner_plan,
4490 : best_path->innersortkeys,
4491 : inner_relids);
4492 :
4493 5082 : label_sort_with_costsize(root, sort, -1.0);
4494 5082 : inner_plan = (Plan *) sort;
4495 5082 : innerpathkeys = best_path->innersortkeys;
4496 : }
4497 : else
4498 441 : innerpathkeys = best_path->jpath.innerjoinpath->pathkeys;
4499 :
4500 : /*
4501 : * If specified, add a materialize node to shield the inner plan from the
4502 : * need to handle mark/restore.
4503 : */
4504 5523 : if (best_path->materialize_inner)
4505 : {
4506 142 : Plan *matplan = (Plan *) make_material(inner_plan);
4507 :
4508 : /*
4509 : * We assume the materialize will not spill to disk, and therefore
4510 : * charge just cpu_operator_cost per tuple. (Keep this estimate in
4511 : * sync with final_cost_mergejoin.)
4512 : */
4513 142 : copy_plan_costsize(matplan, inner_plan);
4514 142 : matplan->total_cost += cpu_operator_cost * matplan->plan_rows;
4515 :
4516 142 : inner_plan = matplan;
4517 : }
4518 :
4519 : /*
4520 : * Compute the opfamily/collation/strategy/nullsfirst arrays needed by the
4521 : * executor. The information is in the pathkeys for the two inputs, but
4522 : * we need to be careful about the possibility of mergeclauses sharing a
4523 : * pathkey, as well as the possibility that the inner pathkeys are not in
4524 : * an order matching the mergeclauses.
4525 : */
4526 5523 : nClauses = list_length(mergeclauses);
4527 : Assert(nClauses == list_length(best_path->path_mergeclauses));
4528 5523 : mergefamilies = (Oid *) palloc(nClauses * sizeof(Oid));
4529 5523 : mergecollations = (Oid *) palloc(nClauses * sizeof(Oid));
4530 5523 : mergereversals = (bool *) palloc(nClauses * sizeof(bool));
4531 5523 : mergenullsfirst = (bool *) palloc(nClauses * sizeof(bool));
4532 :
4533 5523 : opathkey = NULL;
4534 5523 : opeclass = NULL;
4535 5523 : lop = list_head(outerpathkeys);
4536 5523 : lip = list_head(innerpathkeys);
4537 5523 : i = 0;
4538 12025 : foreach(lc, best_path->path_mergeclauses)
4539 : {
4540 6502 : RestrictInfo *rinfo = lfirst_node(RestrictInfo, lc);
4541 : EquivalenceClass *oeclass;
4542 : EquivalenceClass *ieclass;
4543 6502 : PathKey *ipathkey = NULL;
4544 6502 : EquivalenceClass *ipeclass = NULL;
4545 6502 : bool first_inner_match = false;
4546 :
4547 : /* fetch outer/inner eclass from mergeclause */
4548 6502 : if (rinfo->outer_is_left)
4549 : {
4550 5301 : oeclass = rinfo->left_ec;
4551 5301 : ieclass = rinfo->right_ec;
4552 : }
4553 : else
4554 : {
4555 1201 : oeclass = rinfo->right_ec;
4556 1201 : ieclass = rinfo->left_ec;
4557 : }
4558 : Assert(oeclass != NULL);
4559 : Assert(ieclass != NULL);
4560 :
4561 : /*
4562 : * We must identify the pathkey elements associated with this clause
4563 : * by matching the eclasses (which should give a unique match, since
4564 : * the pathkey lists should be canonical). In typical cases the merge
4565 : * clauses are one-to-one with the pathkeys, but when dealing with
4566 : * partially redundant query conditions, things are more complicated.
4567 : *
4568 : * lop and lip reference the first as-yet-unmatched pathkey elements.
4569 : * If they're NULL then all pathkey elements have been matched.
4570 : *
4571 : * The ordering of the outer pathkeys should match the mergeclauses,
4572 : * by construction (see find_mergeclauses_for_outer_pathkeys()). There
4573 : * could be more than one mergeclause for the same outer pathkey, but
4574 : * no pathkey may be entirely skipped over.
4575 : */
4576 6502 : if (oeclass != opeclass) /* multiple matches are not interesting */
4577 : {
4578 : /* doesn't match the current opathkey, so must match the next */
4579 6492 : if (lop == NULL)
4580 0 : elog(ERROR, "outer pathkeys do not match mergeclauses");
4581 6492 : opathkey = (PathKey *) lfirst(lop);
4582 6492 : opeclass = opathkey->pk_eclass;
4583 6492 : lop = lnext(outerpathkeys, lop);
4584 6492 : if (oeclass != opeclass)
4585 0 : elog(ERROR, "outer pathkeys do not match mergeclauses");
4586 : }
4587 :
4588 : /*
4589 : * The inner pathkeys likewise should not have skipped-over keys, but
4590 : * it's possible for a mergeclause to reference some earlier inner
4591 : * pathkey if we had redundant pathkeys. For example we might have
4592 : * mergeclauses like "o.a = i.x AND o.b = i.y AND o.c = i.x". The
4593 : * implied inner ordering is then "ORDER BY x, y, x", but the pathkey
4594 : * mechanism drops the second sort by x as redundant, and this code
4595 : * must cope.
4596 : *
4597 : * It's also possible for the implied inner-rel ordering to be like
4598 : * "ORDER BY x, y, x DESC". We still drop the second instance of x as
4599 : * redundant; but this means that the sort ordering of a redundant
4600 : * inner pathkey should not be considered significant. So we must
4601 : * detect whether this is the first clause matching an inner pathkey.
4602 : */
4603 6502 : if (lip)
4604 : {
4605 6487 : ipathkey = (PathKey *) lfirst(lip);
4606 6487 : ipeclass = ipathkey->pk_eclass;
4607 6487 : if (ieclass == ipeclass)
4608 : {
4609 : /* successful first match to this inner pathkey */
4610 6487 : lip = lnext(innerpathkeys, lip);
4611 6487 : first_inner_match = true;
4612 : }
4613 : }
4614 6502 : if (!first_inner_match)
4615 : {
4616 : /* redundant clause ... must match something before lip */
4617 : ListCell *l2;
4618 :
4619 15 : foreach(l2, innerpathkeys)
4620 : {
4621 15 : if (l2 == lip)
4622 0 : break;
4623 15 : ipathkey = (PathKey *) lfirst(l2);
4624 15 : ipeclass = ipathkey->pk_eclass;
4625 15 : if (ieclass == ipeclass)
4626 15 : break;
4627 : }
4628 15 : if (ieclass != ipeclass)
4629 0 : elog(ERROR, "inner pathkeys do not match mergeclauses");
4630 : }
4631 :
4632 : /*
4633 : * The pathkeys should always match each other as to opfamily and
4634 : * collation (which affect equality), but if we're considering a
4635 : * redundant inner pathkey, its sort ordering might not match. In
4636 : * such cases we may ignore the inner pathkey's sort ordering and use
4637 : * the outer's. (In effect, we're lying to the executor about the
4638 : * sort direction of this inner column, but it does not matter since
4639 : * the run-time row comparisons would only reach this column when
4640 : * there's equality for the earlier column containing the same eclass.
4641 : * There could be only one value in this column for the range of inner
4642 : * rows having a given value in the earlier column, so it does not
4643 : * matter which way we imagine this column to be ordered.) But a
4644 : * non-redundant inner pathkey had better match outer's ordering too.
4645 : */
4646 6502 : if (opathkey->pk_opfamily != ipathkey->pk_opfamily ||
4647 6502 : opathkey->pk_eclass->ec_collation != ipathkey->pk_eclass->ec_collation)
4648 0 : elog(ERROR, "left and right pathkeys do not match in mergejoin");
4649 6502 : if (first_inner_match &&
4650 6487 : (opathkey->pk_cmptype != ipathkey->pk_cmptype ||
4651 6487 : opathkey->pk_nulls_first != ipathkey->pk_nulls_first))
4652 0 : elog(ERROR, "left and right pathkeys do not match in mergejoin");
4653 :
4654 : /* OK, save info for executor */
4655 6502 : mergefamilies[i] = opathkey->pk_opfamily;
4656 6502 : mergecollations[i] = opathkey->pk_eclass->ec_collation;
4657 6502 : mergereversals[i] = (opathkey->pk_cmptype == COMPARE_GT ? true : false);
4658 6502 : mergenullsfirst[i] = opathkey->pk_nulls_first;
4659 6502 : i++;
4660 : }
4661 :
4662 : /*
4663 : * Note: it is not an error if we have additional pathkey elements (i.e.,
4664 : * lop or lip isn't NULL here). The input paths might be better-sorted
4665 : * than we need for the current mergejoin.
4666 : */
4667 :
4668 : /*
4669 : * Now we can build the mergejoin node.
4670 : */
4671 5523 : join_plan = make_mergejoin(tlist,
4672 : joinclauses,
4673 : otherclauses,
4674 : mergeclauses,
4675 : mergefamilies,
4676 : mergecollations,
4677 : mergereversals,
4678 : mergenullsfirst,
4679 : outer_plan,
4680 : inner_plan,
4681 : best_path->jpath.jointype,
4682 5523 : best_path->jpath.inner_unique,
4683 5523 : best_path->skip_mark_restore);
4684 :
4685 : /* Costs of sort and material steps are included in path cost already */
4686 5523 : copy_generic_path_info(&join_plan->join.plan, &best_path->jpath.path);
4687 :
4688 5523 : return join_plan;
4689 : }
4690 :
4691 : static HashJoin *
4692 30901 : create_hashjoin_plan(PlannerInfo *root,
4693 : HashPath *best_path)
4694 : {
4695 : HashJoin *join_plan;
4696 : Hash *hash_plan;
4697 : Plan *outer_plan;
4698 : Plan *inner_plan;
4699 30901 : List *tlist = build_path_tlist(root, &best_path->jpath.path);
4700 : List *joinclauses;
4701 : List *otherclauses;
4702 : List *hashclauses;
4703 30901 : List *hashoperators = NIL;
4704 30901 : List *hashcollations = NIL;
4705 30901 : List *inner_hashkeys = NIL;
4706 30901 : List *outer_hashkeys = NIL;
4707 30901 : Oid skewTable = InvalidOid;
4708 30901 : AttrNumber skewColumn = InvalidAttrNumber;
4709 30901 : bool skewInherit = false;
4710 : ListCell *lc;
4711 :
4712 : /*
4713 : * HashJoin can project, so we don't have to demand exact tlists from the
4714 : * inputs. However, it's best to request a small tlist from the inner
4715 : * side, so that we aren't storing more data than necessary. Likewise, if
4716 : * we anticipate batching, request a small tlist from the outer side so
4717 : * that we don't put extra data in the outer batch files.
4718 : */
4719 30901 : outer_plan = create_plan_recurse(root, best_path->jpath.outerjoinpath,
4720 30901 : (best_path->num_batches > 1) ? CP_SMALL_TLIST : 0);
4721 :
4722 30901 : inner_plan = create_plan_recurse(root, best_path->jpath.innerjoinpath,
4723 : CP_SMALL_TLIST);
4724 :
4725 : /* Sort join qual clauses into best execution order */
4726 30901 : joinclauses = order_qual_clauses(root, best_path->jpath.joinrestrictinfo);
4727 : /* There's no point in sorting the hash clauses ... */
4728 :
4729 : /* Get the join qual clauses (in plain expression form) */
4730 : /* Any pseudoconstant clauses are ignored here */
4731 30901 : if (IS_OUTER_JOIN(best_path->jpath.jointype))
4732 : {
4733 9817 : extract_actual_join_clauses(joinclauses,
4734 9817 : best_path->jpath.path.parent->relids,
4735 : &joinclauses, &otherclauses);
4736 : }
4737 : else
4738 : {
4739 : /* We can treat all clauses alike for an inner join */
4740 21084 : joinclauses = extract_actual_clauses(joinclauses, false);
4741 21084 : otherclauses = NIL;
4742 : }
4743 :
4744 : /*
4745 : * Remove the hashclauses from the list of join qual clauses, leaving the
4746 : * list of quals that must be checked as qpquals.
4747 : */
4748 30901 : hashclauses = get_actual_clauses(best_path->path_hashclauses);
4749 30901 : joinclauses = list_difference(joinclauses, hashclauses);
4750 :
4751 : /*
4752 : * Replace any outer-relation variables with nestloop params. There
4753 : * should not be any in the hashclauses.
4754 : */
4755 30901 : if (best_path->jpath.path.param_info)
4756 : {
4757 140 : joinclauses = (List *)
4758 140 : replace_nestloop_params(root, (Node *) joinclauses);
4759 140 : otherclauses = (List *)
4760 140 : replace_nestloop_params(root, (Node *) otherclauses);
4761 : }
4762 :
4763 : /*
4764 : * Rearrange hashclauses, if needed, so that the outer variable is always
4765 : * on the left.
4766 : */
4767 30901 : hashclauses = get_switched_clauses(best_path->path_hashclauses,
4768 30901 : best_path->jpath.outerjoinpath->parent->relids);
4769 :
4770 : /*
4771 : * If there is a single join clause and we can identify the outer variable
4772 : * as a simple column reference, supply its identity for possible use in
4773 : * skew optimization. (Note: in principle we could do skew optimization
4774 : * with multiple join clauses, but we'd have to be able to determine the
4775 : * most common combinations of outer values, which we don't currently have
4776 : * enough stats for.)
4777 : */
4778 30901 : if (list_length(hashclauses) == 1)
4779 : {
4780 27883 : OpExpr *clause = (OpExpr *) linitial(hashclauses);
4781 : Node *node;
4782 :
4783 : Assert(is_opclause(clause));
4784 27883 : node = (Node *) linitial(clause->args);
4785 27883 : if (IsA(node, RelabelType))
4786 506 : node = (Node *) ((RelabelType *) node)->arg;
4787 27883 : if (IsA(node, Var))
4788 : {
4789 24530 : Var *var = (Var *) node;
4790 : RangeTblEntry *rte;
4791 :
4792 24530 : rte = root->simple_rte_array[var->varno];
4793 24530 : if (rte->rtekind == RTE_RELATION)
4794 : {
4795 22458 : skewTable = rte->relid;
4796 22458 : skewColumn = var->varattno;
4797 22458 : skewInherit = rte->inh;
4798 : }
4799 : }
4800 : }
4801 :
4802 : /*
4803 : * Collect hash related information. The hashed expressions are
4804 : * deconstructed into outer/inner expressions, so they can be computed
4805 : * separately (inner expressions are used to build the hashtable via Hash,
4806 : * outer expressions to perform lookups of tuples from HashJoin's outer
4807 : * plan in the hashtable). Also collect operator information necessary to
4808 : * build the hashtable.
4809 : */
4810 65045 : foreach(lc, hashclauses)
4811 : {
4812 34144 : OpExpr *hclause = lfirst_node(OpExpr, lc);
4813 :
4814 34144 : hashoperators = lappend_oid(hashoperators, hclause->opno);
4815 34144 : hashcollations = lappend_oid(hashcollations, hclause->inputcollid);
4816 34144 : outer_hashkeys = lappend(outer_hashkeys, linitial(hclause->args));
4817 34144 : inner_hashkeys = lappend(inner_hashkeys, lsecond(hclause->args));
4818 : }
4819 :
4820 : /*
4821 : * Build the hash node and hash join node.
4822 : */
4823 30901 : hash_plan = make_hash(inner_plan,
4824 : inner_hashkeys,
4825 : skewTable,
4826 : skewColumn,
4827 : skewInherit);
4828 :
4829 : /*
4830 : * Set Hash node's startup & total costs equal to total cost of input
4831 : * plan; this only affects EXPLAIN display not decisions.
4832 : */
4833 30901 : copy_plan_costsize(&hash_plan->plan, inner_plan);
4834 30901 : hash_plan->plan.startup_cost = hash_plan->plan.total_cost;
4835 :
4836 : /*
4837 : * If parallel-aware, the executor will also need an estimate of the total
4838 : * number of rows expected from all participants so that it can size the
4839 : * shared hash table.
4840 : */
4841 30901 : if (best_path->jpath.path.parallel_aware)
4842 : {
4843 176 : hash_plan->plan.parallel_aware = true;
4844 176 : hash_plan->rows_total = best_path->inner_rows_total;
4845 : }
4846 :
4847 30901 : join_plan = make_hashjoin(tlist,
4848 : joinclauses,
4849 : otherclauses,
4850 : hashclauses,
4851 : hashoperators,
4852 : hashcollations,
4853 : outer_hashkeys,
4854 : outer_plan,
4855 : (Plan *) hash_plan,
4856 : best_path->jpath.jointype,
4857 30901 : best_path->jpath.inner_unique);
4858 :
4859 30901 : copy_generic_path_info(&join_plan->join.plan, &best_path->jpath.path);
4860 :
4861 30901 : return join_plan;
4862 : }
4863 :
4864 :
4865 : /*****************************************************************************
4866 : *
4867 : * SUPPORTING ROUTINES
4868 : *
4869 : *****************************************************************************/
4870 :
4871 : /*
4872 : * replace_nestloop_params
4873 : * Replace outer-relation Vars and PlaceHolderVars in the given expression
4874 : * with nestloop Params
4875 : *
4876 : * All Vars and PlaceHolderVars belonging to the relation(s) identified by
4877 : * root->curOuterRels are replaced by Params, and entries are added to
4878 : * root->curOuterParams if not already present.
4879 : */
4880 : static Node *
4881 276586 : replace_nestloop_params(PlannerInfo *root, Node *expr)
4882 : {
4883 : /* No setup needed for tree walk, so away we go */
4884 276586 : return replace_nestloop_params_mutator(expr, root);
4885 : }
4886 :
4887 : static Node *
4888 1010174 : replace_nestloop_params_mutator(Node *node, PlannerInfo *root)
4889 : {
4890 1010174 : if (node == NULL)
4891 68637 : return NULL;
4892 941537 : if (IsA(node, Var))
4893 : {
4894 295380 : Var *var = (Var *) node;
4895 :
4896 : /* Upper-level Vars should be long gone at this point */
4897 : Assert(var->varlevelsup == 0);
4898 : /* If not to be replaced, we can just return the Var unmodified */
4899 295380 : if (IS_SPECIAL_VARNO(var->varno) ||
4900 295370 : !bms_is_member(var->varno, root->curOuterRels))
4901 217669 : return node;
4902 : /* Replace the Var with a nestloop Param */
4903 77711 : return (Node *) replace_nestloop_param_var(root, var);
4904 : }
4905 646157 : if (IsA(node, PlaceHolderVar))
4906 : {
4907 792 : PlaceHolderVar *phv = (PlaceHolderVar *) node;
4908 :
4909 : /* Upper-level PlaceHolderVars should be long gone at this point */
4910 : Assert(phv->phlevelsup == 0);
4911 :
4912 : /* Check whether we need to replace the PHV */
4913 792 : if (!bms_is_subset(find_placeholder_info(root, phv)->ph_eval_at,
4914 792 : root->curOuterRels))
4915 : {
4916 : /*
4917 : * We can't replace the whole PHV, but we might still need to
4918 : * replace Vars or PHVs within its expression, in case it ends up
4919 : * actually getting evaluated here. (It might get evaluated in
4920 : * this plan node, or some child node; in the latter case we don't
4921 : * really need to process the expression here, but we haven't got
4922 : * enough info to tell if that's the case.) Flat-copy the PHV
4923 : * node and then recurse on its expression.
4924 : *
4925 : * Note that after doing this, we might have different
4926 : * representations of the contents of the same PHV in different
4927 : * parts of the plan tree. This is OK because equal() will just
4928 : * match on phid/phlevelsup, so setrefs.c will still recognize an
4929 : * upper-level reference to a lower-level copy of the same PHV.
4930 : */
4931 522 : PlaceHolderVar *newphv = makeNode(PlaceHolderVar);
4932 :
4933 522 : memcpy(newphv, phv, sizeof(PlaceHolderVar));
4934 522 : newphv->phexpr = (Expr *)
4935 522 : replace_nestloop_params_mutator((Node *) phv->phexpr,
4936 : root);
4937 522 : return (Node *) newphv;
4938 : }
4939 : /* Replace the PlaceHolderVar with a nestloop Param */
4940 270 : return (Node *) replace_nestloop_param_placeholdervar(root, phv);
4941 : }
4942 645365 : return expression_tree_mutator(node, replace_nestloop_params_mutator, root);
4943 : }
4944 :
4945 : /*
4946 : * fix_indexqual_references
4947 : * Adjust indexqual clauses to the form the executor's indexqual
4948 : * machinery needs.
4949 : *
4950 : * We have three tasks here:
4951 : * * Select the actual qual clauses out of the input IndexClause list,
4952 : * and remove RestrictInfo nodes from the qual clauses.
4953 : * * Replace any outer-relation Var or PHV nodes with nestloop Params.
4954 : * (XXX eventually, that responsibility should go elsewhere?)
4955 : * * Index keys must be represented by Var nodes with varattno set to the
4956 : * index's attribute number, not the attribute number in the original rel.
4957 : *
4958 : * *stripped_indexquals_p receives a list of the actual qual clauses.
4959 : *
4960 : * *fixed_indexquals_p receives a list of the adjusted quals. This is a copy
4961 : * that shares no substructure with the original; this is needed in case there
4962 : * are subplans in it (we need two separate copies of the subplan tree, or
4963 : * things will go awry).
4964 : */
4965 : static void
4966 133958 : fix_indexqual_references(PlannerInfo *root, IndexPath *index_path,
4967 : List **stripped_indexquals_p, List **fixed_indexquals_p)
4968 : {
4969 133958 : IndexOptInfo *index = index_path->indexinfo;
4970 : List *stripped_indexquals;
4971 : List *fixed_indexquals;
4972 : ListCell *lc;
4973 :
4974 133958 : stripped_indexquals = fixed_indexquals = NIL;
4975 :
4976 281312 : foreach(lc, index_path->indexclauses)
4977 : {
4978 147354 : IndexClause *iclause = lfirst_node(IndexClause, lc);
4979 147354 : int indexcol = iclause->indexcol;
4980 : ListCell *lc2;
4981 :
4982 295559 : foreach(lc2, iclause->indexquals)
4983 : {
4984 148205 : RestrictInfo *rinfo = lfirst_node(RestrictInfo, lc2);
4985 148205 : Node *clause = (Node *) rinfo->clause;
4986 :
4987 148205 : stripped_indexquals = lappend(stripped_indexquals, clause);
4988 148205 : clause = fix_indexqual_clause(root, index, indexcol,
4989 : clause, iclause->indexcols);
4990 148205 : fixed_indexquals = lappend(fixed_indexquals, clause);
4991 : }
4992 : }
4993 :
4994 133958 : *stripped_indexquals_p = stripped_indexquals;
4995 133958 : *fixed_indexquals_p = fixed_indexquals;
4996 133958 : }
4997 :
4998 : /*
4999 : * fix_indexorderby_references
5000 : * Adjust indexorderby clauses to the form the executor's index
5001 : * machinery needs.
5002 : *
5003 : * This is a simplified version of fix_indexqual_references. The input is
5004 : * bare clauses and a separate indexcol list, instead of IndexClauses.
5005 : */
5006 : static List *
5007 133958 : fix_indexorderby_references(PlannerInfo *root, IndexPath *index_path)
5008 : {
5009 133958 : IndexOptInfo *index = index_path->indexinfo;
5010 : List *fixed_indexorderbys;
5011 : ListCell *lcc,
5012 : *lci;
5013 :
5014 133958 : fixed_indexorderbys = NIL;
5015 :
5016 134251 : forboth(lcc, index_path->indexorderbys, lci, index_path->indexorderbycols)
5017 : {
5018 293 : Node *clause = (Node *) lfirst(lcc);
5019 293 : int indexcol = lfirst_int(lci);
5020 :
5021 293 : clause = fix_indexqual_clause(root, index, indexcol, clause, NIL);
5022 293 : fixed_indexorderbys = lappend(fixed_indexorderbys, clause);
5023 : }
5024 :
5025 133958 : return fixed_indexorderbys;
5026 : }
5027 :
5028 : /*
5029 : * fix_indexqual_clause
5030 : * Convert a single indexqual clause to the form needed by the executor.
5031 : *
5032 : * We replace nestloop params here, and replace the index key variables
5033 : * or expressions by index Var nodes.
5034 : */
5035 : static Node *
5036 148498 : fix_indexqual_clause(PlannerInfo *root, IndexOptInfo *index, int indexcol,
5037 : Node *clause, List *indexcolnos)
5038 : {
5039 : /*
5040 : * Replace any outer-relation variables with nestloop params.
5041 : *
5042 : * This also makes a copy of the clause, so it's safe to modify it
5043 : * in-place below.
5044 : */
5045 148498 : clause = replace_nestloop_params(root, clause);
5046 :
5047 148498 : if (IsA(clause, OpExpr))
5048 : {
5049 145944 : OpExpr *op = (OpExpr *) clause;
5050 :
5051 : /* Replace the indexkey expression with an index Var. */
5052 145944 : linitial(op->args) = fix_indexqual_operand(linitial(op->args),
5053 : index,
5054 : indexcol);
5055 : }
5056 2554 : else if (IsA(clause, RowCompareExpr))
5057 : {
5058 140 : RowCompareExpr *rc = (RowCompareExpr *) clause;
5059 : ListCell *lca,
5060 : *lcai;
5061 :
5062 : /* Replace the indexkey expressions with index Vars. */
5063 : Assert(list_length(rc->largs) == list_length(indexcolnos));
5064 420 : forboth(lca, rc->largs, lcai, indexcolnos)
5065 : {
5066 280 : lfirst(lca) = fix_indexqual_operand(lfirst(lca),
5067 : index,
5068 : lfirst_int(lcai));
5069 : }
5070 : }
5071 2414 : else if (IsA(clause, ScalarArrayOpExpr))
5072 : {
5073 1671 : ScalarArrayOpExpr *saop = (ScalarArrayOpExpr *) clause;
5074 :
5075 : /* Replace the indexkey expression with an index Var. */
5076 1671 : linitial(saop->args) = fix_indexqual_operand(linitial(saop->args),
5077 : index,
5078 : indexcol);
5079 : }
5080 743 : else if (IsA(clause, NullTest))
5081 : {
5082 743 : NullTest *nt = (NullTest *) clause;
5083 :
5084 : /* Replace the indexkey expression with an index Var. */
5085 743 : nt->arg = (Expr *) fix_indexqual_operand((Node *) nt->arg,
5086 : index,
5087 : indexcol);
5088 : }
5089 : else
5090 0 : elog(ERROR, "unsupported indexqual type: %d",
5091 : (int) nodeTag(clause));
5092 :
5093 148498 : return clause;
5094 : }
5095 :
5096 : /*
5097 : * fix_indexqual_operand
5098 : * Convert an indexqual expression to a Var referencing the index column.
5099 : *
5100 : * We represent index keys by Var nodes having varno == INDEX_VAR and varattno
5101 : * equal to the index's attribute number (index column position).
5102 : *
5103 : * Most of the code here is just for sanity cross-checking that the given
5104 : * expression actually matches the index column it's claimed to. It should
5105 : * match the logic in match_index_to_operand().
5106 : */
5107 : static Node *
5108 148638 : fix_indexqual_operand(Node *node, IndexOptInfo *index, int indexcol)
5109 : {
5110 : Var *result;
5111 : int pos;
5112 : ListCell *indexpr_item;
5113 :
5114 : Assert(indexcol >= 0 && indexcol < index->ncolumns);
5115 :
5116 : /*
5117 : * Remove any PlaceHolderVar wrapping of the indexkey
5118 : */
5119 148638 : node = strip_phvs_in_index_operand(node);
5120 :
5121 : /*
5122 : * Remove any binary-compatible relabeling of the indexkey
5123 : */
5124 149285 : while (IsA(node, RelabelType))
5125 647 : node = (Node *) ((RelabelType *) node)->arg;
5126 :
5127 148638 : if (index->indexkeys[indexcol] != 0)
5128 : {
5129 : /* It's a simple index column */
5130 148328 : if (IsA(node, Var) &&
5131 148328 : ((Var *) node)->varno == index->rel->relid &&
5132 148328 : ((Var *) node)->varattno == index->indexkeys[indexcol])
5133 : {
5134 148328 : result = (Var *) copyObject(node);
5135 148328 : result->varno = INDEX_VAR;
5136 148328 : result->varattno = indexcol + 1;
5137 148328 : return (Node *) result;
5138 : }
5139 : else
5140 0 : elog(ERROR, "index key does not match expected index column");
5141 : }
5142 :
5143 : /* It's an index expression, so find and cross-check the expression */
5144 310 : indexpr_item = list_head(index->indexprs);
5145 310 : for (pos = 0; pos < index->ncolumns; pos++)
5146 : {
5147 310 : if (index->indexkeys[pos] == 0)
5148 : {
5149 310 : if (indexpr_item == NULL)
5150 0 : elog(ERROR, "too few entries in indexprs list");
5151 310 : if (pos == indexcol)
5152 : {
5153 : Node *indexkey;
5154 :
5155 310 : indexkey = (Node *) lfirst(indexpr_item);
5156 310 : if (indexkey && IsA(indexkey, RelabelType))
5157 5 : indexkey = (Node *) ((RelabelType *) indexkey)->arg;
5158 310 : if (equal(node, indexkey))
5159 : {
5160 310 : result = makeVar(INDEX_VAR, indexcol + 1,
5161 310 : exprType(lfirst(indexpr_item)), -1,
5162 310 : exprCollation(lfirst(indexpr_item)),
5163 : 0);
5164 310 : return (Node *) result;
5165 : }
5166 : else
5167 0 : elog(ERROR, "index key does not match expected index column");
5168 : }
5169 0 : indexpr_item = lnext(index->indexprs, indexpr_item);
5170 : }
5171 : }
5172 :
5173 : /* Oops... */
5174 0 : elog(ERROR, "index key does not match expected index column");
5175 : return NULL; /* keep compiler quiet */
5176 : }
5177 :
5178 : /*
5179 : * get_switched_clauses
5180 : * Given a list of merge or hash joinclauses (as RestrictInfo nodes),
5181 : * extract the bare clauses, and rearrange the elements within the
5182 : * clauses, if needed, so the outer join variable is on the left and
5183 : * the inner is on the right. The original clause data structure is not
5184 : * touched; a modified list is returned. We do, however, set the transient
5185 : * outer_is_left field in each RestrictInfo to show which side was which.
5186 : */
5187 : static List *
5188 36424 : get_switched_clauses(List *clauses, Relids outerrelids)
5189 : {
5190 36424 : List *t_list = NIL;
5191 : ListCell *l;
5192 :
5193 77070 : foreach(l, clauses)
5194 : {
5195 40646 : RestrictInfo *restrictinfo = (RestrictInfo *) lfirst(l);
5196 40646 : OpExpr *clause = (OpExpr *) restrictinfo->clause;
5197 :
5198 : Assert(is_opclause(clause));
5199 40646 : if (bms_is_subset(restrictinfo->right_relids, outerrelids))
5200 : {
5201 : /*
5202 : * Duplicate just enough of the structure to allow commuting the
5203 : * clause without changing the original list. Could use
5204 : * copyObject, but a complete deep copy is overkill.
5205 : */
5206 17771 : OpExpr *temp = makeNode(OpExpr);
5207 :
5208 17771 : temp->opno = clause->opno;
5209 17771 : temp->opfuncid = InvalidOid;
5210 17771 : temp->opresulttype = clause->opresulttype;
5211 17771 : temp->opretset = clause->opretset;
5212 17771 : temp->opcollid = clause->opcollid;
5213 17771 : temp->inputcollid = clause->inputcollid;
5214 17771 : temp->args = list_copy(clause->args);
5215 17771 : temp->location = clause->location;
5216 : /* Commute it --- note this modifies the temp node in-place. */
5217 17771 : CommuteOpExpr(temp);
5218 17771 : t_list = lappend(t_list, temp);
5219 17771 : restrictinfo->outer_is_left = false;
5220 : }
5221 : else
5222 : {
5223 : Assert(bms_is_subset(restrictinfo->left_relids, outerrelids));
5224 22875 : t_list = lappend(t_list, clause);
5225 22875 : restrictinfo->outer_is_left = true;
5226 : }
5227 : }
5228 36424 : return t_list;
5229 : }
5230 :
5231 : /*
5232 : * order_qual_clauses
5233 : * Given a list of qual clauses that will all be evaluated at the same
5234 : * plan node, sort the list into the order we want to check the quals
5235 : * in at runtime.
5236 : *
5237 : * When security barrier quals are used in the query, we may have quals with
5238 : * different security levels in the list. Quals of lower security_level
5239 : * must go before quals of higher security_level, except that we can grant
5240 : * exceptions to move up quals that are leakproof. When security level
5241 : * doesn't force the decision, we prefer to order clauses by estimated
5242 : * execution cost, cheapest first.
5243 : *
5244 : * Ideally the order should be driven by a combination of execution cost and
5245 : * selectivity, but it's not immediately clear how to account for both,
5246 : * and given the uncertainty of the estimates the reliability of the decisions
5247 : * would be doubtful anyway. So we just order by security level then
5248 : * estimated per-tuple cost, being careful not to change the order when
5249 : * (as is often the case) the estimates are identical.
5250 : *
5251 : * Although this will work on either bare clauses or RestrictInfos, it's
5252 : * much faster to apply it to RestrictInfos, since it can re-use cost
5253 : * information that is cached in RestrictInfos. XXX in the bare-clause
5254 : * case, we are also not able to apply security considerations. That is
5255 : * all right for the moment, because the bare-clause case doesn't occur
5256 : * anywhere that barrier quals could be present, but it would be better to
5257 : * get rid of it.
5258 : *
5259 : * Note: some callers pass lists that contain entries that will later be
5260 : * removed; this is the easiest way to let this routine see RestrictInfos
5261 : * instead of bare clauses. This is another reason why trying to consider
5262 : * selectivity in the ordering would likely do the wrong thing.
5263 : */
5264 : static List *
5265 728989 : order_qual_clauses(PlannerInfo *root, List *clauses)
5266 : {
5267 : typedef struct
5268 : {
5269 : Node *clause;
5270 : Cost cost;
5271 : Index security_level;
5272 : } QualItem;
5273 728989 : int nitems = list_length(clauses);
5274 : QualItem *items;
5275 : ListCell *lc;
5276 : int i;
5277 : List *result;
5278 :
5279 : /* No need to work hard for 0 or 1 clause */
5280 728989 : if (nitems <= 1)
5281 665592 : return clauses;
5282 :
5283 : /*
5284 : * Collect the items and costs into an array. This is to avoid repeated
5285 : * cost_qual_eval work if the inputs aren't RestrictInfos.
5286 : */
5287 63397 : items = (QualItem *) palloc(nitems * sizeof(QualItem));
5288 63397 : i = 0;
5289 206752 : foreach(lc, clauses)
5290 : {
5291 143355 : Node *clause = (Node *) lfirst(lc);
5292 : QualCost qcost;
5293 :
5294 143355 : cost_qual_eval_node(&qcost, clause, root);
5295 143355 : items[i].clause = clause;
5296 143355 : items[i].cost = qcost.per_tuple;
5297 143355 : if (IsA(clause, RestrictInfo))
5298 : {
5299 143285 : RestrictInfo *rinfo = (RestrictInfo *) clause;
5300 :
5301 : /*
5302 : * If a clause is leakproof, it doesn't have to be constrained by
5303 : * its nominal security level. If it's also reasonably cheap
5304 : * (here defined as 10X cpu_operator_cost), pretend it has
5305 : * security_level 0, which will allow it to go in front of
5306 : * more-expensive quals of lower security levels. Of course, that
5307 : * will also force it to go in front of cheaper quals of its own
5308 : * security level, which is not so great, but we can alleviate
5309 : * that risk by applying the cost limit cutoff.
5310 : */
5311 143285 : if (rinfo->leakproof && items[i].cost < 10 * cpu_operator_cost)
5312 1135 : items[i].security_level = 0;
5313 : else
5314 142150 : items[i].security_level = rinfo->security_level;
5315 : }
5316 : else
5317 70 : items[i].security_level = 0;
5318 143355 : i++;
5319 : }
5320 :
5321 : /*
5322 : * Sort. We don't use qsort() because it's not guaranteed stable for
5323 : * equal keys. The expected number of entries is small enough that a
5324 : * simple insertion sort should be good enough.
5325 : */
5326 143355 : for (i = 1; i < nitems; i++)
5327 : {
5328 79958 : QualItem newitem = items[i];
5329 : int j;
5330 :
5331 : /* insert newitem into the already-sorted subarray */
5332 88877 : for (j = i; j > 0; j--)
5333 : {
5334 81716 : QualItem *olditem = &items[j - 1];
5335 :
5336 81716 : if (newitem.security_level > olditem->security_level ||
5337 80871 : (newitem.security_level == olditem->security_level &&
5338 79677 : newitem.cost >= olditem->cost))
5339 : break;
5340 8919 : items[j] = *olditem;
5341 : }
5342 79958 : items[j] = newitem;
5343 : }
5344 :
5345 : /* Convert back to a list */
5346 63397 : result = NIL;
5347 206752 : for (i = 0; i < nitems; i++)
5348 143355 : result = lappend(result, items[i].clause);
5349 :
5350 63397 : return result;
5351 : }
5352 :
5353 : /*
5354 : * Copy cost and size info from a Path node to the Plan node created from it.
5355 : * The executor usually won't use this info, but it's needed by EXPLAIN.
5356 : * Also copy the parallel-related flags, which the executor *will* use.
5357 : */
5358 : static void
5359 883773 : copy_generic_path_info(Plan *dest, Path *src)
5360 : {
5361 883773 : dest->disabled_nodes = src->disabled_nodes;
5362 883773 : dest->startup_cost = src->startup_cost;
5363 883773 : dest->total_cost = src->total_cost;
5364 883773 : dest->plan_rows = src->rows;
5365 883773 : dest->plan_width = src->pathtarget->width;
5366 883773 : dest->parallel_aware = src->parallel_aware;
5367 883773 : dest->parallel_safe = src->parallel_safe;
5368 883773 : }
5369 :
5370 : /*
5371 : * Copy cost and size info from a lower plan node to an inserted node.
5372 : * (Most callers alter the info after copying it.)
5373 : */
5374 : static void
5375 39540 : copy_plan_costsize(Plan *dest, Plan *src)
5376 : {
5377 39540 : dest->disabled_nodes = src->disabled_nodes;
5378 39540 : dest->startup_cost = src->startup_cost;
5379 39540 : dest->total_cost = src->total_cost;
5380 39540 : dest->plan_rows = src->plan_rows;
5381 39540 : dest->plan_width = src->plan_width;
5382 : /* Assume the inserted node is not parallel-aware. */
5383 39540 : dest->parallel_aware = false;
5384 : /* Assume the inserted node is parallel-safe, if child plan is. */
5385 39540 : dest->parallel_safe = src->parallel_safe;
5386 39540 : }
5387 :
5388 : /*
5389 : * Some places in this file build Sort nodes that don't have a directly
5390 : * corresponding Path node. The cost of the sort is, or should have been,
5391 : * included in the cost of the Path node we're working from, but since it's
5392 : * not split out, we have to re-figure it using cost_sort(). This is just
5393 : * to label the Sort node nicely for EXPLAIN.
5394 : *
5395 : * limit_tuples is as for cost_sort (in particular, pass -1 if no limit)
5396 : */
5397 : static void
5398 7863 : label_sort_with_costsize(PlannerInfo *root, Sort *plan, double limit_tuples)
5399 : {
5400 7863 : Plan *lefttree = plan->plan.lefttree;
5401 : Path sort_path; /* dummy for result of cost_sort */
5402 :
5403 : Assert(IsA(plan, Sort));
5404 :
5405 7863 : cost_sort(&sort_path, root, NIL,
5406 : plan->plan.disabled_nodes,
5407 : lefttree->total_cost,
5408 : lefttree->plan_rows,
5409 : lefttree->plan_width,
5410 : 0.0,
5411 : work_mem,
5412 : limit_tuples);
5413 7863 : plan->plan.startup_cost = sort_path.startup_cost;
5414 7863 : plan->plan.total_cost = sort_path.total_cost;
5415 7863 : plan->plan.plan_rows = lefttree->plan_rows;
5416 7863 : plan->plan.plan_width = lefttree->plan_width;
5417 7863 : plan->plan.parallel_aware = false;
5418 7863 : plan->plan.parallel_safe = lefttree->parallel_safe;
5419 7863 : }
5420 :
5421 : /*
5422 : * Same as label_sort_with_costsize, but labels the IncrementalSort node
5423 : * instead.
5424 : */
5425 : static void
5426 30 : label_incrementalsort_with_costsize(PlannerInfo *root, IncrementalSort *plan,
5427 : List *pathkeys, double limit_tuples)
5428 : {
5429 30 : Plan *lefttree = plan->sort.plan.lefttree;
5430 : Path sort_path; /* dummy for result of cost_incremental_sort */
5431 :
5432 : Assert(IsA(plan, IncrementalSort));
5433 :
5434 30 : cost_incremental_sort(&sort_path, root, pathkeys,
5435 : plan->nPresortedCols,
5436 : plan->sort.plan.disabled_nodes,
5437 : lefttree->startup_cost,
5438 : lefttree->total_cost,
5439 : lefttree->plan_rows,
5440 : lefttree->plan_width,
5441 : 0.0,
5442 : work_mem,
5443 : limit_tuples);
5444 30 : plan->sort.plan.startup_cost = sort_path.startup_cost;
5445 30 : plan->sort.plan.total_cost = sort_path.total_cost;
5446 30 : plan->sort.plan.plan_rows = lefttree->plan_rows;
5447 30 : plan->sort.plan.plan_width = lefttree->plan_width;
5448 30 : plan->sort.plan.parallel_aware = false;
5449 30 : plan->sort.plan.parallel_safe = lefttree->parallel_safe;
5450 30 : }
5451 :
5452 : /*
5453 : * bitmap_subplan_mark_shared
5454 : * Set isshared flag in bitmap subplan so that it will be created in
5455 : * shared memory.
5456 : */
5457 : static void
5458 25 : bitmap_subplan_mark_shared(Plan *plan)
5459 : {
5460 25 : if (IsA(plan, BitmapAnd))
5461 0 : bitmap_subplan_mark_shared(linitial(((BitmapAnd *) plan)->bitmapplans));
5462 25 : else if (IsA(plan, BitmapOr))
5463 : {
5464 0 : ((BitmapOr *) plan)->isshared = true;
5465 0 : bitmap_subplan_mark_shared(linitial(((BitmapOr *) plan)->bitmapplans));
5466 : }
5467 25 : else if (IsA(plan, BitmapIndexScan))
5468 25 : ((BitmapIndexScan *) plan)->isshared = true;
5469 : else
5470 0 : elog(ERROR, "unrecognized node type: %d", nodeTag(plan));
5471 25 : }
5472 :
5473 : /*****************************************************************************
5474 : *
5475 : * PLAN NODE BUILDING ROUTINES
5476 : *
5477 : * In general, these functions are not passed the original Path and therefore
5478 : * leave it to the caller to fill in the cost/width fields from the Path,
5479 : * typically by calling copy_generic_path_info(). This convention is
5480 : * somewhat historical, but it does support a few places above where we build
5481 : * a plan node without having an exactly corresponding Path node. Under no
5482 : * circumstances should one of these functions do its own cost calculations,
5483 : * as that would be redundant with calculations done while building Paths.
5484 : *
5485 : *****************************************************************************/
5486 :
5487 : static SeqScan *
5488 182617 : make_seqscan(List *qptlist,
5489 : List *qpqual,
5490 : Index scanrelid)
5491 : {
5492 182617 : SeqScan *node = makeNode(SeqScan);
5493 182617 : Plan *plan = &node->scan.plan;
5494 :
5495 182617 : plan->targetlist = qptlist;
5496 182617 : plan->qual = qpqual;
5497 182617 : plan->lefttree = NULL;
5498 182617 : plan->righttree = NULL;
5499 182617 : node->scan.scanrelid = scanrelid;
5500 :
5501 182617 : return node;
5502 : }
5503 :
5504 : static SampleScan *
5505 243 : make_samplescan(List *qptlist,
5506 : List *qpqual,
5507 : Index scanrelid,
5508 : TableSampleClause *tsc)
5509 : {
5510 243 : SampleScan *node = makeNode(SampleScan);
5511 243 : Plan *plan = &node->scan.plan;
5512 :
5513 243 : plan->targetlist = qptlist;
5514 243 : plan->qual = qpqual;
5515 243 : plan->lefttree = NULL;
5516 243 : plan->righttree = NULL;
5517 243 : node->scan.scanrelid = scanrelid;
5518 243 : node->tablesample = tsc;
5519 :
5520 243 : return node;
5521 : }
5522 :
5523 : static IndexScan *
5524 120347 : make_indexscan(List *qptlist,
5525 : List *qpqual,
5526 : Index scanrelid,
5527 : Oid indexid,
5528 : List *indexqual,
5529 : List *indexqualorig,
5530 : List *indexorderby,
5531 : List *indexorderbyorig,
5532 : List *indexorderbyops,
5533 : ScanDirection indexscandir)
5534 : {
5535 120347 : IndexScan *node = makeNode(IndexScan);
5536 120347 : Plan *plan = &node->scan.plan;
5537 :
5538 120347 : plan->targetlist = qptlist;
5539 120347 : plan->qual = qpqual;
5540 120347 : plan->lefttree = NULL;
5541 120347 : plan->righttree = NULL;
5542 120347 : node->scan.scanrelid = scanrelid;
5543 120347 : node->indexid = indexid;
5544 120347 : node->indexqual = indexqual;
5545 120347 : node->indexqualorig = indexqualorig;
5546 120347 : node->indexorderby = indexorderby;
5547 120347 : node->indexorderbyorig = indexorderbyorig;
5548 120347 : node->indexorderbyops = indexorderbyops;
5549 120347 : node->indexorderdir = indexscandir;
5550 :
5551 120347 : return node;
5552 : }
5553 :
5554 : static IndexOnlyScan *
5555 13611 : make_indexonlyscan(List *qptlist,
5556 : List *qpqual,
5557 : Index scanrelid,
5558 : Oid indexid,
5559 : List *indexqual,
5560 : List *recheckqual,
5561 : List *indexorderby,
5562 : List *indextlist,
5563 : ScanDirection indexscandir)
5564 : {
5565 13611 : IndexOnlyScan *node = makeNode(IndexOnlyScan);
5566 13611 : Plan *plan = &node->scan.plan;
5567 :
5568 13611 : plan->targetlist = qptlist;
5569 13611 : plan->qual = qpqual;
5570 13611 : plan->lefttree = NULL;
5571 13611 : plan->righttree = NULL;
5572 13611 : node->scan.scanrelid = scanrelid;
5573 13611 : node->indexid = indexid;
5574 13611 : node->indexqual = indexqual;
5575 13611 : node->recheckqual = recheckqual;
5576 13611 : node->indexorderby = indexorderby;
5577 13611 : node->indextlist = indextlist;
5578 13611 : node->indexorderdir = indexscandir;
5579 :
5580 13611 : return node;
5581 : }
5582 :
5583 : static BitmapIndexScan *
5584 19157 : make_bitmap_indexscan(Index scanrelid,
5585 : Oid indexid,
5586 : List *indexqual,
5587 : List *indexqualorig)
5588 : {
5589 19157 : BitmapIndexScan *node = makeNode(BitmapIndexScan);
5590 19157 : Plan *plan = &node->scan.plan;
5591 :
5592 19157 : plan->targetlist = NIL; /* not used */
5593 19157 : plan->qual = NIL; /* not used */
5594 19157 : plan->lefttree = NULL;
5595 19157 : plan->righttree = NULL;
5596 19157 : node->scan.scanrelid = scanrelid;
5597 19157 : node->indexid = indexid;
5598 19157 : node->indexqual = indexqual;
5599 19157 : node->indexqualorig = indexqualorig;
5600 :
5601 19157 : return node;
5602 : }
5603 :
5604 : static BitmapHeapScan *
5605 18698 : make_bitmap_heapscan(List *qptlist,
5606 : List *qpqual,
5607 : Plan *lefttree,
5608 : List *bitmapqualorig,
5609 : Index scanrelid)
5610 : {
5611 18698 : BitmapHeapScan *node = makeNode(BitmapHeapScan);
5612 18698 : Plan *plan = &node->scan.plan;
5613 :
5614 18698 : plan->targetlist = qptlist;
5615 18698 : plan->qual = qpqual;
5616 18698 : plan->lefttree = lefttree;
5617 18698 : plan->righttree = NULL;
5618 18698 : node->scan.scanrelid = scanrelid;
5619 18698 : node->bitmapqualorig = bitmapqualorig;
5620 :
5621 18698 : return node;
5622 : }
5623 :
5624 : static TidScan *
5625 548 : make_tidscan(List *qptlist,
5626 : List *qpqual,
5627 : Index scanrelid,
5628 : List *tidquals)
5629 : {
5630 548 : TidScan *node = makeNode(TidScan);
5631 548 : Plan *plan = &node->scan.plan;
5632 :
5633 548 : plan->targetlist = qptlist;
5634 548 : plan->qual = qpqual;
5635 548 : plan->lefttree = NULL;
5636 548 : plan->righttree = NULL;
5637 548 : node->scan.scanrelid = scanrelid;
5638 548 : node->tidquals = tidquals;
5639 :
5640 548 : return node;
5641 : }
5642 :
5643 : static TidRangeScan *
5644 1668 : make_tidrangescan(List *qptlist,
5645 : List *qpqual,
5646 : Index scanrelid,
5647 : List *tidrangequals)
5648 : {
5649 1668 : TidRangeScan *node = makeNode(TidRangeScan);
5650 1668 : Plan *plan = &node->scan.plan;
5651 :
5652 1668 : plan->targetlist = qptlist;
5653 1668 : plan->qual = qpqual;
5654 1668 : plan->lefttree = NULL;
5655 1668 : plan->righttree = NULL;
5656 1668 : node->scan.scanrelid = scanrelid;
5657 1668 : node->tidrangequals = tidrangequals;
5658 :
5659 1668 : return node;
5660 : }
5661 :
5662 : static SubqueryScan *
5663 30197 : make_subqueryscan(List *qptlist,
5664 : List *qpqual,
5665 : Index scanrelid,
5666 : Plan *subplan)
5667 : {
5668 30197 : SubqueryScan *node = makeNode(SubqueryScan);
5669 30197 : Plan *plan = &node->scan.plan;
5670 :
5671 30197 : plan->targetlist = qptlist;
5672 30197 : plan->qual = qpqual;
5673 30197 : plan->lefttree = NULL;
5674 30197 : plan->righttree = NULL;
5675 30197 : node->scan.scanrelid = scanrelid;
5676 30197 : node->subplan = subplan;
5677 30197 : node->scanstatus = SUBQUERY_SCAN_UNKNOWN;
5678 :
5679 30197 : return node;
5680 : }
5681 :
5682 : static FunctionScan *
5683 35105 : make_functionscan(List *qptlist,
5684 : List *qpqual,
5685 : Index scanrelid,
5686 : List *functions,
5687 : bool funcordinality)
5688 : {
5689 35105 : FunctionScan *node = makeNode(FunctionScan);
5690 35105 : Plan *plan = &node->scan.plan;
5691 :
5692 35105 : plan->targetlist = qptlist;
5693 35105 : plan->qual = qpqual;
5694 35105 : plan->lefttree = NULL;
5695 35105 : plan->righttree = NULL;
5696 35105 : node->scan.scanrelid = scanrelid;
5697 35105 : node->functions = functions;
5698 35105 : node->funcordinality = funcordinality;
5699 :
5700 35105 : return node;
5701 : }
5702 :
5703 : static TableFuncScan *
5704 519 : make_tablefuncscan(List *qptlist,
5705 : List *qpqual,
5706 : Index scanrelid,
5707 : TableFunc *tablefunc)
5708 : {
5709 519 : TableFuncScan *node = makeNode(TableFuncScan);
5710 519 : Plan *plan = &node->scan.plan;
5711 :
5712 519 : plan->targetlist = qptlist;
5713 519 : plan->qual = qpqual;
5714 519 : plan->lefttree = NULL;
5715 519 : plan->righttree = NULL;
5716 519 : node->scan.scanrelid = scanrelid;
5717 519 : node->tablefunc = tablefunc;
5718 :
5719 519 : return node;
5720 : }
5721 :
5722 : static ValuesScan *
5723 6686 : make_valuesscan(List *qptlist,
5724 : List *qpqual,
5725 : Index scanrelid,
5726 : List *values_lists)
5727 : {
5728 6686 : ValuesScan *node = makeNode(ValuesScan);
5729 6686 : Plan *plan = &node->scan.plan;
5730 :
5731 6686 : plan->targetlist = qptlist;
5732 6686 : plan->qual = qpqual;
5733 6686 : plan->lefttree = NULL;
5734 6686 : plan->righttree = NULL;
5735 6686 : node->scan.scanrelid = scanrelid;
5736 6686 : node->values_lists = values_lists;
5737 :
5738 6686 : return node;
5739 : }
5740 :
5741 : static CteScan *
5742 2913 : make_ctescan(List *qptlist,
5743 : List *qpqual,
5744 : Index scanrelid,
5745 : int ctePlanId,
5746 : int cteParam)
5747 : {
5748 2913 : CteScan *node = makeNode(CteScan);
5749 2913 : Plan *plan = &node->scan.plan;
5750 :
5751 2913 : plan->targetlist = qptlist;
5752 2913 : plan->qual = qpqual;
5753 2913 : plan->lefttree = NULL;
5754 2913 : plan->righttree = NULL;
5755 2913 : node->scan.scanrelid = scanrelid;
5756 2913 : node->ctePlanId = ctePlanId;
5757 2913 : node->cteParam = cteParam;
5758 :
5759 2913 : return node;
5760 : }
5761 :
5762 : static NamedTuplestoreScan *
5763 391 : make_namedtuplestorescan(List *qptlist,
5764 : List *qpqual,
5765 : Index scanrelid,
5766 : char *enrname)
5767 : {
5768 391 : NamedTuplestoreScan *node = makeNode(NamedTuplestoreScan);
5769 391 : Plan *plan = &node->scan.plan;
5770 :
5771 : /* cost should be inserted by caller */
5772 391 : plan->targetlist = qptlist;
5773 391 : plan->qual = qpqual;
5774 391 : plan->lefttree = NULL;
5775 391 : plan->righttree = NULL;
5776 391 : node->scan.scanrelid = scanrelid;
5777 391 : node->enrname = enrname;
5778 :
5779 391 : return node;
5780 : }
5781 :
5782 : static WorkTableScan *
5783 686 : make_worktablescan(List *qptlist,
5784 : List *qpqual,
5785 : Index scanrelid,
5786 : int wtParam)
5787 : {
5788 686 : WorkTableScan *node = makeNode(WorkTableScan);
5789 686 : Plan *plan = &node->scan.plan;
5790 :
5791 686 : plan->targetlist = qptlist;
5792 686 : plan->qual = qpqual;
5793 686 : plan->lefttree = NULL;
5794 686 : plan->righttree = NULL;
5795 686 : node->scan.scanrelid = scanrelid;
5796 686 : node->wtParam = wtParam;
5797 :
5798 686 : return node;
5799 : }
5800 :
5801 : ForeignScan *
5802 1048 : make_foreignscan(List *qptlist,
5803 : List *qpqual,
5804 : Index scanrelid,
5805 : List *fdw_exprs,
5806 : List *fdw_private,
5807 : List *fdw_scan_tlist,
5808 : List *fdw_recheck_quals,
5809 : Plan *outer_plan)
5810 : {
5811 1048 : ForeignScan *node = makeNode(ForeignScan);
5812 1048 : Plan *plan = &node->scan.plan;
5813 :
5814 : /* cost will be filled in by create_foreignscan_plan */
5815 1048 : plan->targetlist = qptlist;
5816 1048 : plan->qual = qpqual;
5817 1048 : plan->lefttree = outer_plan;
5818 1048 : plan->righttree = NULL;
5819 1048 : node->scan.scanrelid = scanrelid;
5820 :
5821 : /* these may be overridden by the FDW's PlanDirectModify callback. */
5822 1048 : node->operation = CMD_SELECT;
5823 1048 : node->resultRelation = 0;
5824 :
5825 : /* checkAsUser, fs_server will be filled in by create_foreignscan_plan */
5826 1048 : node->checkAsUser = InvalidOid;
5827 1048 : node->fs_server = InvalidOid;
5828 1048 : node->fdw_exprs = fdw_exprs;
5829 1048 : node->fdw_private = fdw_private;
5830 1048 : node->fdw_scan_tlist = fdw_scan_tlist;
5831 1048 : node->fdw_recheck_quals = fdw_recheck_quals;
5832 : /* fs_relids, fs_base_relids will be filled by create_foreignscan_plan */
5833 1048 : node->fs_relids = NULL;
5834 1048 : node->fs_base_relids = NULL;
5835 : /* fsSystemCol will be filled in by create_foreignscan_plan */
5836 1048 : node->fsSystemCol = false;
5837 :
5838 1048 : return node;
5839 : }
5840 :
5841 : static RecursiveUnion *
5842 686 : make_recursive_union(List *tlist,
5843 : Plan *lefttree,
5844 : Plan *righttree,
5845 : int wtParam,
5846 : List *distinctList,
5847 : Cardinality numGroups)
5848 : {
5849 686 : RecursiveUnion *node = makeNode(RecursiveUnion);
5850 686 : Plan *plan = &node->plan;
5851 686 : int numCols = list_length(distinctList);
5852 :
5853 686 : plan->targetlist = tlist;
5854 686 : plan->qual = NIL;
5855 686 : plan->lefttree = lefttree;
5856 686 : plan->righttree = righttree;
5857 686 : node->wtParam = wtParam;
5858 :
5859 : /*
5860 : * convert SortGroupClause list into arrays of attr indexes and equality
5861 : * operators, as wanted by executor
5862 : */
5863 686 : node->numCols = numCols;
5864 686 : if (numCols > 0)
5865 : {
5866 284 : int keyno = 0;
5867 : AttrNumber *dupColIdx;
5868 : Oid *dupOperators;
5869 : Oid *dupCollations;
5870 : ListCell *slitem;
5871 :
5872 284 : dupColIdx = palloc_array(AttrNumber, numCols);
5873 284 : dupOperators = palloc_array(Oid, numCols);
5874 284 : dupCollations = palloc_array(Oid, numCols);
5875 :
5876 1086 : foreach(slitem, distinctList)
5877 : {
5878 802 : SortGroupClause *sortcl = (SortGroupClause *) lfirst(slitem);
5879 802 : TargetEntry *tle = get_sortgroupclause_tle(sortcl,
5880 : plan->targetlist);
5881 :
5882 802 : dupColIdx[keyno] = tle->resno;
5883 802 : dupOperators[keyno] = sortcl->eqop;
5884 802 : dupCollations[keyno] = exprCollation((Node *) tle->expr);
5885 : Assert(OidIsValid(dupOperators[keyno]));
5886 802 : keyno++;
5887 : }
5888 284 : node->dupColIdx = dupColIdx;
5889 284 : node->dupOperators = dupOperators;
5890 284 : node->dupCollations = dupCollations;
5891 : }
5892 686 : node->numGroups = numGroups;
5893 :
5894 686 : return node;
5895 : }
5896 :
5897 : static BitmapAnd *
5898 165 : make_bitmap_and(List *bitmapplans)
5899 : {
5900 165 : BitmapAnd *node = makeNode(BitmapAnd);
5901 165 : Plan *plan = &node->plan;
5902 :
5903 165 : plan->targetlist = NIL;
5904 165 : plan->qual = NIL;
5905 165 : plan->lefttree = NULL;
5906 165 : plan->righttree = NULL;
5907 165 : node->bitmapplans = bitmapplans;
5908 :
5909 165 : return node;
5910 : }
5911 :
5912 : static BitmapOr *
5913 289 : make_bitmap_or(List *bitmapplans)
5914 : {
5915 289 : BitmapOr *node = makeNode(BitmapOr);
5916 289 : Plan *plan = &node->plan;
5917 :
5918 289 : plan->targetlist = NIL;
5919 289 : plan->qual = NIL;
5920 289 : plan->lefttree = NULL;
5921 289 : plan->righttree = NULL;
5922 289 : node->bitmapplans = bitmapplans;
5923 :
5924 289 : return node;
5925 : }
5926 :
5927 : static NestLoop *
5928 76730 : make_nestloop(List *tlist,
5929 : List *joinclauses,
5930 : List *otherclauses,
5931 : List *nestParams,
5932 : Plan *lefttree,
5933 : Plan *righttree,
5934 : JoinType jointype,
5935 : bool inner_unique)
5936 : {
5937 76730 : NestLoop *node = makeNode(NestLoop);
5938 76730 : Plan *plan = &node->join.plan;
5939 :
5940 76730 : plan->targetlist = tlist;
5941 76730 : plan->qual = otherclauses;
5942 76730 : plan->lefttree = lefttree;
5943 76730 : plan->righttree = righttree;
5944 76730 : node->join.jointype = jointype;
5945 76730 : node->join.inner_unique = inner_unique;
5946 76730 : node->join.joinqual = joinclauses;
5947 76730 : node->nestParams = nestParams;
5948 :
5949 76730 : return node;
5950 : }
5951 :
5952 : static HashJoin *
5953 30901 : make_hashjoin(List *tlist,
5954 : List *joinclauses,
5955 : List *otherclauses,
5956 : List *hashclauses,
5957 : List *hashoperators,
5958 : List *hashcollations,
5959 : List *hashkeys,
5960 : Plan *lefttree,
5961 : Plan *righttree,
5962 : JoinType jointype,
5963 : bool inner_unique)
5964 : {
5965 30901 : HashJoin *node = makeNode(HashJoin);
5966 30901 : Plan *plan = &node->join.plan;
5967 :
5968 30901 : plan->targetlist = tlist;
5969 30901 : plan->qual = otherclauses;
5970 30901 : plan->lefttree = lefttree;
5971 30901 : plan->righttree = righttree;
5972 30901 : node->hashclauses = hashclauses;
5973 30901 : node->hashoperators = hashoperators;
5974 30901 : node->hashcollations = hashcollations;
5975 30901 : node->hashkeys = hashkeys;
5976 30901 : node->join.jointype = jointype;
5977 30901 : node->join.inner_unique = inner_unique;
5978 30901 : node->join.joinqual = joinclauses;
5979 :
5980 30901 : return node;
5981 : }
5982 :
5983 : static Hash *
5984 30901 : make_hash(Plan *lefttree,
5985 : List *hashkeys,
5986 : Oid skewTable,
5987 : AttrNumber skewColumn,
5988 : bool skewInherit)
5989 : {
5990 30901 : Hash *node = makeNode(Hash);
5991 30901 : Plan *plan = &node->plan;
5992 :
5993 30901 : plan->targetlist = lefttree->targetlist;
5994 30901 : plan->qual = NIL;
5995 30901 : plan->lefttree = lefttree;
5996 30901 : plan->righttree = NULL;
5997 :
5998 30901 : node->hashkeys = hashkeys;
5999 30901 : node->skewTable = skewTable;
6000 30901 : node->skewColumn = skewColumn;
6001 30901 : node->skewInherit = skewInherit;
6002 :
6003 30901 : return node;
6004 : }
6005 :
6006 : static MergeJoin *
6007 5523 : make_mergejoin(List *tlist,
6008 : List *joinclauses,
6009 : List *otherclauses,
6010 : List *mergeclauses,
6011 : Oid *mergefamilies,
6012 : Oid *mergecollations,
6013 : bool *mergereversals,
6014 : bool *mergenullsfirst,
6015 : Plan *lefttree,
6016 : Plan *righttree,
6017 : JoinType jointype,
6018 : bool inner_unique,
6019 : bool skip_mark_restore)
6020 : {
6021 5523 : MergeJoin *node = makeNode(MergeJoin);
6022 5523 : Plan *plan = &node->join.plan;
6023 :
6024 5523 : plan->targetlist = tlist;
6025 5523 : plan->qual = otherclauses;
6026 5523 : plan->lefttree = lefttree;
6027 5523 : plan->righttree = righttree;
6028 5523 : node->skip_mark_restore = skip_mark_restore;
6029 5523 : node->mergeclauses = mergeclauses;
6030 5523 : node->mergeFamilies = mergefamilies;
6031 5523 : node->mergeCollations = mergecollations;
6032 5523 : node->mergeReversals = mergereversals;
6033 5523 : node->mergeNullsFirst = mergenullsfirst;
6034 5523 : node->join.jointype = jointype;
6035 5523 : node->join.inner_unique = inner_unique;
6036 5523 : node->join.joinqual = joinclauses;
6037 :
6038 5523 : return node;
6039 : }
6040 :
6041 : /*
6042 : * make_sort --- basic routine to build a Sort plan node
6043 : *
6044 : * Caller must have built the sortColIdx, sortOperators, collations, and
6045 : * nullsFirst arrays already.
6046 : */
6047 : static Sort *
6048 65418 : make_sort(Plan *lefttree, int numCols,
6049 : AttrNumber *sortColIdx, Oid *sortOperators,
6050 : Oid *collations, bool *nullsFirst)
6051 : {
6052 : Sort *node;
6053 : Plan *plan;
6054 :
6055 65418 : node = makeNode(Sort);
6056 :
6057 65418 : plan = &node->plan;
6058 65418 : plan->targetlist = lefttree->targetlist;
6059 65418 : plan->disabled_nodes = lefttree->disabled_nodes + (enable_sort == false);
6060 65418 : plan->qual = NIL;
6061 65418 : plan->lefttree = lefttree;
6062 65418 : plan->righttree = NULL;
6063 65418 : node->numCols = numCols;
6064 65418 : node->sortColIdx = sortColIdx;
6065 65418 : node->sortOperators = sortOperators;
6066 65418 : node->collations = collations;
6067 65418 : node->nullsFirst = nullsFirst;
6068 :
6069 65418 : return node;
6070 : }
6071 :
6072 : /*
6073 : * make_incrementalsort --- basic routine to build an IncrementalSort plan node
6074 : *
6075 : * Caller must have built the sortColIdx, sortOperators, collations, and
6076 : * nullsFirst arrays already.
6077 : */
6078 : static IncrementalSort *
6079 740 : make_incrementalsort(Plan *lefttree, int numCols, int nPresortedCols,
6080 : AttrNumber *sortColIdx, Oid *sortOperators,
6081 : Oid *collations, bool *nullsFirst)
6082 : {
6083 : IncrementalSort *node;
6084 : Plan *plan;
6085 :
6086 740 : node = makeNode(IncrementalSort);
6087 :
6088 740 : plan = &node->sort.plan;
6089 740 : plan->targetlist = lefttree->targetlist;
6090 740 : plan->qual = NIL;
6091 740 : plan->lefttree = lefttree;
6092 740 : plan->righttree = NULL;
6093 740 : node->nPresortedCols = nPresortedCols;
6094 740 : node->sort.numCols = numCols;
6095 740 : node->sort.sortColIdx = sortColIdx;
6096 740 : node->sort.sortOperators = sortOperators;
6097 740 : node->sort.collations = collations;
6098 740 : node->sort.nullsFirst = nullsFirst;
6099 :
6100 740 : return node;
6101 : }
6102 :
6103 : /*
6104 : * prepare_sort_from_pathkeys
6105 : * Prepare to sort according to given pathkeys
6106 : *
6107 : * This is used to set up for Sort, MergeAppend, and Gather Merge nodes. It
6108 : * calculates the executor's representation of the sort key information, and
6109 : * adjusts the plan targetlist if needed to add resjunk sort columns.
6110 : *
6111 : * Input parameters:
6112 : * 'lefttree' is the plan node which yields input tuples
6113 : * 'pathkeys' is the list of pathkeys by which the result is to be sorted
6114 : * 'relids' identifies the child relation being sorted, if any
6115 : * 'reqColIdx' is NULL or an array of required sort key column numbers
6116 : * 'adjust_tlist_in_place' is true if lefttree must be modified in-place
6117 : *
6118 : * We must convert the pathkey information into arrays of sort key column
6119 : * numbers, sort operator OIDs, collation OIDs, and nulls-first flags,
6120 : * which is the representation the executor wants. These are returned into
6121 : * the output parameters *p_numsortkeys etc.
6122 : *
6123 : * When looking for matches to an EquivalenceClass's members, we will only
6124 : * consider child EC members if they belong to given 'relids'. This protects
6125 : * against possible incorrect matches to child expressions that contain no
6126 : * Vars.
6127 : *
6128 : * If reqColIdx isn't NULL then it contains sort key column numbers that
6129 : * we should match. This is used when making child plans for a MergeAppend;
6130 : * it's an error if we can't match the columns.
6131 : *
6132 : * If the pathkeys include expressions that aren't simple Vars, we will
6133 : * usually need to add resjunk items to the input plan's targetlist to
6134 : * compute these expressions, since a Sort or MergeAppend node itself won't
6135 : * do any such calculations. If the input plan type isn't one that can do
6136 : * projections, this means adding a Result node just to do the projection.
6137 : * However, the caller can pass adjust_tlist_in_place = true to force the
6138 : * lefttree tlist to be modified in-place regardless of whether the node type
6139 : * can project --- we use this for fixing the tlist of MergeAppend itself.
6140 : *
6141 : * Returns the node which is to be the input to the Sort (either lefttree,
6142 : * or a Result stacked atop lefttree).
6143 : */
6144 : static Plan *
6145 68890 : prepare_sort_from_pathkeys(Plan *lefttree, List *pathkeys,
6146 : Relids relids,
6147 : const AttrNumber *reqColIdx,
6148 : bool adjust_tlist_in_place,
6149 : int *p_numsortkeys,
6150 : AttrNumber **p_sortColIdx,
6151 : Oid **p_sortOperators,
6152 : Oid **p_collations,
6153 : bool **p_nullsFirst)
6154 : {
6155 68890 : List *tlist = lefttree->targetlist;
6156 : ListCell *i;
6157 : int numsortkeys;
6158 : AttrNumber *sortColIdx;
6159 : Oid *sortOperators;
6160 : Oid *collations;
6161 : bool *nullsFirst;
6162 :
6163 : /*
6164 : * We will need at most list_length(pathkeys) sort columns; possibly less
6165 : */
6166 68890 : numsortkeys = list_length(pathkeys);
6167 68890 : sortColIdx = (AttrNumber *) palloc(numsortkeys * sizeof(AttrNumber));
6168 68890 : sortOperators = (Oid *) palloc(numsortkeys * sizeof(Oid));
6169 68890 : collations = (Oid *) palloc(numsortkeys * sizeof(Oid));
6170 68890 : nullsFirst = (bool *) palloc(numsortkeys * sizeof(bool));
6171 :
6172 68890 : numsortkeys = 0;
6173 :
6174 169927 : foreach(i, pathkeys)
6175 : {
6176 101037 : PathKey *pathkey = (PathKey *) lfirst(i);
6177 101037 : EquivalenceClass *ec = pathkey->pk_eclass;
6178 : EquivalenceMember *em;
6179 101037 : TargetEntry *tle = NULL;
6180 101037 : Oid pk_datatype = InvalidOid;
6181 : Oid sortop;
6182 : ListCell *j;
6183 :
6184 101037 : if (ec->ec_has_volatile)
6185 : {
6186 : /*
6187 : * If the pathkey's EquivalenceClass is volatile, then it must
6188 : * have come from an ORDER BY clause, and we have to match it to
6189 : * that same targetlist entry.
6190 : */
6191 169 : if (ec->ec_sortref == 0) /* can't happen */
6192 0 : elog(ERROR, "volatile EquivalenceClass has no sortref");
6193 169 : tle = get_sortgroupref_tle(ec->ec_sortref, tlist);
6194 : Assert(tle);
6195 : Assert(list_length(ec->ec_members) == 1);
6196 169 : pk_datatype = ((EquivalenceMember *) linitial(ec->ec_members))->em_datatype;
6197 : }
6198 100868 : else if (reqColIdx != NULL)
6199 : {
6200 : /*
6201 : * If we are given a sort column number to match, only consider
6202 : * the single TLE at that position. It's possible that there is
6203 : * no such TLE, in which case fall through and generate a resjunk
6204 : * targetentry (we assume this must have happened in the parent
6205 : * plan as well). If there is a TLE but it doesn't match the
6206 : * pathkey's EC, we do the same, which is probably the wrong thing
6207 : * but we'll leave it to caller to complain about the mismatch.
6208 : */
6209 2744 : tle = get_tle_by_resno(tlist, reqColIdx[numsortkeys]);
6210 2744 : if (tle)
6211 : {
6212 2644 : em = find_ec_member_matching_expr(ec, tle->expr, relids);
6213 2644 : if (em)
6214 : {
6215 : /* found expr at right place in tlist */
6216 2644 : pk_datatype = em->em_datatype;
6217 : }
6218 : else
6219 0 : tle = NULL;
6220 : }
6221 : }
6222 : else
6223 : {
6224 : /*
6225 : * Otherwise, we can sort by any non-constant expression listed in
6226 : * the pathkey's EquivalenceClass. For now, we take the first
6227 : * tlist item found in the EC. If there's no match, we'll generate
6228 : * a resjunk entry using the first EC member that is an expression
6229 : * in the input's vars.
6230 : *
6231 : * XXX if we have a choice, is there any way of figuring out which
6232 : * might be cheapest to execute? (For example, int4lt is likely
6233 : * much cheaper to execute than numericlt, but both might appear
6234 : * in the same equivalence class...) Not clear that we ever will
6235 : * have an interesting choice in practice, so it may not matter.
6236 : */
6237 225913 : foreach(j, tlist)
6238 : {
6239 225703 : tle = (TargetEntry *) lfirst(j);
6240 225703 : em = find_ec_member_matching_expr(ec, tle->expr, relids);
6241 225703 : if (em)
6242 : {
6243 : /* found expr already in tlist */
6244 97914 : pk_datatype = em->em_datatype;
6245 97914 : break;
6246 : }
6247 127789 : tle = NULL;
6248 : }
6249 : }
6250 :
6251 101037 : if (!tle)
6252 : {
6253 : /*
6254 : * No matching tlist item; look for a computable expression.
6255 : */
6256 310 : em = find_computable_ec_member(NULL, ec, tlist, relids, false);
6257 310 : if (!em)
6258 0 : elog(ERROR, "could not find pathkey item to sort");
6259 310 : pk_datatype = em->em_datatype;
6260 :
6261 : /*
6262 : * Do we need to insert a Result node?
6263 : */
6264 310 : if (!adjust_tlist_in_place &&
6265 280 : !is_projection_capable_plan(lefttree))
6266 : {
6267 : /* copy needed so we don't modify input's tlist below */
6268 21 : tlist = copyObject(tlist);
6269 21 : lefttree = inject_projection_plan(lefttree, tlist,
6270 21 : lefttree->parallel_safe);
6271 : }
6272 :
6273 : /* Don't bother testing is_projection_capable_plan again */
6274 310 : adjust_tlist_in_place = true;
6275 :
6276 : /*
6277 : * Add resjunk entry to input's tlist
6278 : */
6279 310 : tle = makeTargetEntry(copyObject(em->em_expr),
6280 310 : list_length(tlist) + 1,
6281 : NULL,
6282 : true);
6283 310 : tlist = lappend(tlist, tle);
6284 310 : lefttree->targetlist = tlist; /* just in case NIL before */
6285 : }
6286 :
6287 : /*
6288 : * Look up the correct sort operator from the PathKey's slightly
6289 : * abstracted representation.
6290 : */
6291 101037 : sortop = get_opfamily_member_for_cmptype(pathkey->pk_opfamily,
6292 : pk_datatype,
6293 : pk_datatype,
6294 : pathkey->pk_cmptype);
6295 101037 : if (!OidIsValid(sortop)) /* should not happen */
6296 0 : elog(ERROR, "missing operator %d(%u,%u) in opfamily %u",
6297 : pathkey->pk_cmptype, pk_datatype, pk_datatype,
6298 : pathkey->pk_opfamily);
6299 :
6300 : /* Add the column to the sort arrays */
6301 101037 : sortColIdx[numsortkeys] = tle->resno;
6302 101037 : sortOperators[numsortkeys] = sortop;
6303 101037 : collations[numsortkeys] = ec->ec_collation;
6304 101037 : nullsFirst[numsortkeys] = pathkey->pk_nulls_first;
6305 101037 : numsortkeys++;
6306 : }
6307 :
6308 : /* Return results */
6309 68890 : *p_numsortkeys = numsortkeys;
6310 68890 : *p_sortColIdx = sortColIdx;
6311 68890 : *p_sortOperators = sortOperators;
6312 68890 : *p_collations = collations;
6313 68890 : *p_nullsFirst = nullsFirst;
6314 :
6315 68890 : return lefttree;
6316 : }
6317 :
6318 : /*
6319 : * make_sort_from_pathkeys
6320 : * Create sort plan to sort according to given pathkeys
6321 : *
6322 : * 'lefttree' is the node which yields input tuples
6323 : * 'pathkeys' is the list of pathkeys by which the result is to be sorted
6324 : * 'relids' is the set of relations required by prepare_sort_from_pathkeys()
6325 : */
6326 : static Sort *
6327 65118 : make_sort_from_pathkeys(Plan *lefttree, List *pathkeys, Relids relids)
6328 : {
6329 : int numsortkeys;
6330 : AttrNumber *sortColIdx;
6331 : Oid *sortOperators;
6332 : Oid *collations;
6333 : bool *nullsFirst;
6334 :
6335 : /* Compute sort column info, and adjust lefttree as needed */
6336 65118 : lefttree = prepare_sort_from_pathkeys(lefttree, pathkeys,
6337 : relids,
6338 : NULL,
6339 : false,
6340 : &numsortkeys,
6341 : &sortColIdx,
6342 : &sortOperators,
6343 : &collations,
6344 : &nullsFirst);
6345 :
6346 : /* Now build the Sort node */
6347 65118 : return make_sort(lefttree, numsortkeys,
6348 : sortColIdx, sortOperators,
6349 : collations, nullsFirst);
6350 : }
6351 :
6352 : /*
6353 : * make_incrementalsort_from_pathkeys
6354 : * Create sort plan to sort according to given pathkeys
6355 : *
6356 : * 'lefttree' is the node which yields input tuples
6357 : * 'pathkeys' is the list of pathkeys by which the result is to be sorted
6358 : * 'relids' is the set of relations required by prepare_sort_from_pathkeys()
6359 : * 'nPresortedCols' is the number of presorted columns in input tuples
6360 : */
6361 : static IncrementalSort *
6362 720 : make_incrementalsort_from_pathkeys(Plan *lefttree, List *pathkeys,
6363 : Relids relids, int nPresortedCols)
6364 : {
6365 : int numsortkeys;
6366 : AttrNumber *sortColIdx;
6367 : Oid *sortOperators;
6368 : Oid *collations;
6369 : bool *nullsFirst;
6370 :
6371 : /* Compute sort column info, and adjust lefttree as needed */
6372 720 : lefttree = prepare_sort_from_pathkeys(lefttree, pathkeys,
6373 : relids,
6374 : NULL,
6375 : false,
6376 : &numsortkeys,
6377 : &sortColIdx,
6378 : &sortOperators,
6379 : &collations,
6380 : &nullsFirst);
6381 :
6382 : /* Now build the Sort node */
6383 720 : return make_incrementalsort(lefttree, numsortkeys, nPresortedCols,
6384 : sortColIdx, sortOperators,
6385 : collations, nullsFirst);
6386 : }
6387 :
6388 : /*
6389 : * make_sort_from_sortclauses
6390 : * Create sort plan to sort according to given sortclauses
6391 : *
6392 : * 'sortcls' is a list of SortGroupClauses
6393 : * 'lefttree' is the node which yields input tuples
6394 : */
6395 : Sort *
6396 0 : make_sort_from_sortclauses(List *sortcls, Plan *lefttree)
6397 : {
6398 0 : List *sub_tlist = lefttree->targetlist;
6399 : ListCell *l;
6400 : int numsortkeys;
6401 : AttrNumber *sortColIdx;
6402 : Oid *sortOperators;
6403 : Oid *collations;
6404 : bool *nullsFirst;
6405 :
6406 : /* Convert list-ish representation to arrays wanted by executor */
6407 0 : numsortkeys = list_length(sortcls);
6408 0 : sortColIdx = (AttrNumber *) palloc(numsortkeys * sizeof(AttrNumber));
6409 0 : sortOperators = (Oid *) palloc(numsortkeys * sizeof(Oid));
6410 0 : collations = (Oid *) palloc(numsortkeys * sizeof(Oid));
6411 0 : nullsFirst = (bool *) palloc(numsortkeys * sizeof(bool));
6412 :
6413 0 : numsortkeys = 0;
6414 0 : foreach(l, sortcls)
6415 : {
6416 0 : SortGroupClause *sortcl = (SortGroupClause *) lfirst(l);
6417 0 : TargetEntry *tle = get_sortgroupclause_tle(sortcl, sub_tlist);
6418 :
6419 0 : sortColIdx[numsortkeys] = tle->resno;
6420 0 : sortOperators[numsortkeys] = sortcl->sortop;
6421 0 : collations[numsortkeys] = exprCollation((Node *) tle->expr);
6422 0 : nullsFirst[numsortkeys] = sortcl->nulls_first;
6423 0 : numsortkeys++;
6424 : }
6425 :
6426 0 : return make_sort(lefttree, numsortkeys,
6427 : sortColIdx, sortOperators,
6428 : collations, nullsFirst);
6429 : }
6430 :
6431 : /*
6432 : * make_sort_from_groupcols
6433 : * Create sort plan to sort based on grouping columns
6434 : *
6435 : * 'groupcls' is the list of SortGroupClauses
6436 : * 'grpColIdx' gives the column numbers to use
6437 : *
6438 : * This might look like it could be merged with make_sort_from_sortclauses,
6439 : * but presently we *must* use the grpColIdx[] array to locate sort columns,
6440 : * because the child plan's tlist is not marked with ressortgroupref info
6441 : * appropriate to the grouping node. So, only the sort ordering info
6442 : * is used from the SortGroupClause entries.
6443 : */
6444 : static Sort *
6445 240 : make_sort_from_groupcols(List *groupcls,
6446 : AttrNumber *grpColIdx,
6447 : Plan *lefttree)
6448 : {
6449 240 : List *sub_tlist = lefttree->targetlist;
6450 : ListCell *l;
6451 : int numsortkeys;
6452 : AttrNumber *sortColIdx;
6453 : Oid *sortOperators;
6454 : Oid *collations;
6455 : bool *nullsFirst;
6456 :
6457 : /* Convert list-ish representation to arrays wanted by executor */
6458 240 : numsortkeys = list_length(groupcls);
6459 240 : sortColIdx = (AttrNumber *) palloc(numsortkeys * sizeof(AttrNumber));
6460 240 : sortOperators = (Oid *) palloc(numsortkeys * sizeof(Oid));
6461 240 : collations = (Oid *) palloc(numsortkeys * sizeof(Oid));
6462 240 : nullsFirst = (bool *) palloc(numsortkeys * sizeof(bool));
6463 :
6464 240 : numsortkeys = 0;
6465 555 : foreach(l, groupcls)
6466 : {
6467 315 : SortGroupClause *grpcl = (SortGroupClause *) lfirst(l);
6468 315 : TargetEntry *tle = get_tle_by_resno(sub_tlist, grpColIdx[numsortkeys]);
6469 :
6470 315 : if (!tle)
6471 0 : elog(ERROR, "could not retrieve tle for sort-from-groupcols");
6472 :
6473 315 : sortColIdx[numsortkeys] = tle->resno;
6474 315 : sortOperators[numsortkeys] = grpcl->sortop;
6475 315 : collations[numsortkeys] = exprCollation((Node *) tle->expr);
6476 315 : nullsFirst[numsortkeys] = grpcl->nulls_first;
6477 315 : numsortkeys++;
6478 : }
6479 :
6480 240 : return make_sort(lefttree, numsortkeys,
6481 : sortColIdx, sortOperators,
6482 : collations, nullsFirst);
6483 : }
6484 :
6485 : static Material *
6486 3276 : make_material(Plan *lefttree)
6487 : {
6488 3276 : Material *node = makeNode(Material);
6489 3276 : Plan *plan = &node->plan;
6490 :
6491 3276 : plan->targetlist = lefttree->targetlist;
6492 3276 : plan->qual = NIL;
6493 3276 : plan->lefttree = lefttree;
6494 3276 : plan->righttree = NULL;
6495 :
6496 3276 : return node;
6497 : }
6498 :
6499 : /*
6500 : * materialize_finished_plan: stick a Material node atop a completed plan
6501 : *
6502 : * There are a couple of places where we want to attach a Material node
6503 : * after completion of create_plan(), without any MaterialPath path.
6504 : * Those places should probably be refactored someday to do this on the
6505 : * Path representation, but it's not worth the trouble yet.
6506 : */
6507 : Plan *
6508 71 : materialize_finished_plan(Plan *subplan)
6509 : {
6510 : Plan *matplan;
6511 : Path matpath; /* dummy for cost_material */
6512 : Cost initplan_cost;
6513 : bool unsafe_initplans;
6514 :
6515 71 : matplan = (Plan *) make_material(subplan);
6516 :
6517 : /*
6518 : * XXX horrid kluge: if there are any initPlans attached to the subplan,
6519 : * move them up to the Material node, which is now effectively the top
6520 : * plan node in its query level. This prevents failure in
6521 : * SS_finalize_plan(), which see for comments.
6522 : */
6523 71 : matplan->initPlan = subplan->initPlan;
6524 71 : subplan->initPlan = NIL;
6525 :
6526 : /* Move the initplans' cost delta, as well */
6527 71 : SS_compute_initplan_cost(matplan->initPlan,
6528 : &initplan_cost, &unsafe_initplans);
6529 71 : subplan->startup_cost -= initplan_cost;
6530 71 : subplan->total_cost -= initplan_cost;
6531 :
6532 : /* Set cost data */
6533 71 : cost_material(&matpath,
6534 : enable_material,
6535 : subplan->disabled_nodes,
6536 : subplan->startup_cost,
6537 : subplan->total_cost,
6538 : subplan->plan_rows,
6539 : subplan->plan_width);
6540 71 : matplan->disabled_nodes = subplan->disabled_nodes;
6541 71 : matplan->startup_cost = matpath.startup_cost + initplan_cost;
6542 71 : matplan->total_cost = matpath.total_cost + initplan_cost;
6543 71 : matplan->plan_rows = subplan->plan_rows;
6544 71 : matplan->plan_width = subplan->plan_width;
6545 71 : matplan->parallel_aware = false;
6546 71 : matplan->parallel_safe = subplan->parallel_safe;
6547 :
6548 71 : return matplan;
6549 : }
6550 :
6551 : static Memoize *
6552 1528 : make_memoize(Plan *lefttree, Oid *hashoperators, Oid *collations,
6553 : List *param_exprs, bool singlerow, bool binary_mode,
6554 : uint32 est_entries, Bitmapset *keyparamids,
6555 : Cardinality est_calls, Cardinality est_unique_keys,
6556 : double est_hit_ratio)
6557 : {
6558 1528 : Memoize *node = makeNode(Memoize);
6559 1528 : Plan *plan = &node->plan;
6560 :
6561 1528 : plan->targetlist = lefttree->targetlist;
6562 1528 : plan->qual = NIL;
6563 1528 : plan->lefttree = lefttree;
6564 1528 : plan->righttree = NULL;
6565 :
6566 1528 : node->numKeys = list_length(param_exprs);
6567 1528 : node->hashOperators = hashoperators;
6568 1528 : node->collations = collations;
6569 1528 : node->param_exprs = param_exprs;
6570 1528 : node->singlerow = singlerow;
6571 1528 : node->binary_mode = binary_mode;
6572 1528 : node->est_entries = est_entries;
6573 1528 : node->keyparamids = keyparamids;
6574 1528 : node->est_calls = est_calls;
6575 1528 : node->est_unique_keys = est_unique_keys;
6576 1528 : node->est_hit_ratio = est_hit_ratio;
6577 :
6578 1528 : return node;
6579 : }
6580 :
6581 : Agg *
6582 37220 : make_agg(List *tlist, List *qual,
6583 : AggStrategy aggstrategy, AggSplit aggsplit,
6584 : int numGroupCols, AttrNumber *grpColIdx, Oid *grpOperators, Oid *grpCollations,
6585 : List *groupingSets, List *chain, Cardinality numGroups,
6586 : Size transitionSpace, Plan *lefttree)
6587 : {
6588 37220 : Agg *node = makeNode(Agg);
6589 37220 : Plan *plan = &node->plan;
6590 :
6591 37220 : node->aggstrategy = aggstrategy;
6592 37220 : node->aggsplit = aggsplit;
6593 37220 : node->numCols = numGroupCols;
6594 37220 : node->grpColIdx = grpColIdx;
6595 37220 : node->grpOperators = grpOperators;
6596 37220 : node->grpCollations = grpCollations;
6597 37220 : node->numGroups = numGroups;
6598 37220 : node->transitionSpace = transitionSpace;
6599 37220 : node->aggParams = NULL; /* SS_finalize_plan() will fill this */
6600 37220 : node->groupingSets = groupingSets;
6601 37220 : node->chain = chain;
6602 :
6603 37220 : plan->qual = qual;
6604 37220 : plan->targetlist = tlist;
6605 37220 : plan->lefttree = lefttree;
6606 37220 : plan->righttree = NULL;
6607 :
6608 37220 : return node;
6609 : }
6610 :
6611 : static WindowAgg *
6612 2347 : make_windowagg(List *tlist, WindowClause *wc,
6613 : int partNumCols, AttrNumber *partColIdx, Oid *partOperators, Oid *partCollations,
6614 : int ordNumCols, AttrNumber *ordColIdx, Oid *ordOperators, Oid *ordCollations,
6615 : List *runCondition, List *qual, bool topWindow, Plan *lefttree)
6616 : {
6617 2347 : WindowAgg *node = makeNode(WindowAgg);
6618 2347 : Plan *plan = &node->plan;
6619 :
6620 2347 : node->winname = wc->name;
6621 2347 : node->winref = wc->winref;
6622 2347 : node->partNumCols = partNumCols;
6623 2347 : node->partColIdx = partColIdx;
6624 2347 : node->partOperators = partOperators;
6625 2347 : node->partCollations = partCollations;
6626 2347 : node->ordNumCols = ordNumCols;
6627 2347 : node->ordColIdx = ordColIdx;
6628 2347 : node->ordOperators = ordOperators;
6629 2347 : node->ordCollations = ordCollations;
6630 2347 : node->frameOptions = wc->frameOptions;
6631 2347 : node->startOffset = wc->startOffset;
6632 2347 : node->endOffset = wc->endOffset;
6633 2347 : node->runCondition = runCondition;
6634 : /* a duplicate of the above for EXPLAIN */
6635 2347 : node->runConditionOrig = runCondition;
6636 2347 : node->startInRangeFunc = wc->startInRangeFunc;
6637 2347 : node->endInRangeFunc = wc->endInRangeFunc;
6638 2347 : node->inRangeColl = wc->inRangeColl;
6639 2347 : node->inRangeAsc = wc->inRangeAsc;
6640 2347 : node->inRangeNullsFirst = wc->inRangeNullsFirst;
6641 2347 : node->topWindow = topWindow;
6642 :
6643 2347 : plan->targetlist = tlist;
6644 2347 : plan->lefttree = lefttree;
6645 2347 : plan->righttree = NULL;
6646 2347 : plan->qual = qual;
6647 :
6648 2347 : return node;
6649 : }
6650 :
6651 : static Group *
6652 206 : make_group(List *tlist,
6653 : List *qual,
6654 : int numGroupCols,
6655 : AttrNumber *grpColIdx,
6656 : Oid *grpOperators,
6657 : Oid *grpCollations,
6658 : Plan *lefttree)
6659 : {
6660 206 : Group *node = makeNode(Group);
6661 206 : Plan *plan = &node->plan;
6662 :
6663 206 : node->numCols = numGroupCols;
6664 206 : node->grpColIdx = grpColIdx;
6665 206 : node->grpOperators = grpOperators;
6666 206 : node->grpCollations = grpCollations;
6667 :
6668 206 : plan->qual = qual;
6669 206 : plan->targetlist = tlist;
6670 206 : plan->lefttree = lefttree;
6671 206 : plan->righttree = NULL;
6672 :
6673 206 : return node;
6674 : }
6675 :
6676 : /*
6677 : * pathkeys is a list of PathKeys, identifying the sort columns and semantics.
6678 : * The input plan must already be sorted accordingly.
6679 : *
6680 : * relids identifies the child relation being unique-ified, if any.
6681 : */
6682 : static Unique *
6683 4430 : make_unique_from_pathkeys(Plan *lefttree, List *pathkeys, int numCols,
6684 : Relids relids)
6685 : {
6686 4430 : Unique *node = makeNode(Unique);
6687 4430 : Plan *plan = &node->plan;
6688 4430 : int keyno = 0;
6689 : AttrNumber *uniqColIdx;
6690 : Oid *uniqOperators;
6691 : Oid *uniqCollations;
6692 : ListCell *lc;
6693 :
6694 4430 : plan->targetlist = lefttree->targetlist;
6695 4430 : plan->qual = NIL;
6696 4430 : plan->lefttree = lefttree;
6697 4430 : plan->righttree = NULL;
6698 :
6699 : /*
6700 : * Convert pathkeys list into arrays of attr indexes and equality
6701 : * operators, as wanted by executor. This has a lot in common with
6702 : * prepare_sort_from_pathkeys ... maybe unify sometime?
6703 : */
6704 : Assert(numCols >= 0 && numCols <= list_length(pathkeys));
6705 4430 : uniqColIdx = palloc_array(AttrNumber, numCols);
6706 4430 : uniqOperators = palloc_array(Oid, numCols);
6707 4430 : uniqCollations = palloc_array(Oid, numCols);
6708 :
6709 14808 : foreach(lc, pathkeys)
6710 : {
6711 10413 : PathKey *pathkey = (PathKey *) lfirst(lc);
6712 10413 : EquivalenceClass *ec = pathkey->pk_eclass;
6713 : EquivalenceMember *em;
6714 10413 : TargetEntry *tle = NULL;
6715 10413 : Oid pk_datatype = InvalidOid;
6716 : Oid eqop;
6717 : ListCell *j;
6718 :
6719 : /* Ignore pathkeys beyond the specified number of columns */
6720 10413 : if (keyno >= numCols)
6721 35 : break;
6722 :
6723 10378 : if (ec->ec_has_volatile)
6724 : {
6725 : /*
6726 : * If the pathkey's EquivalenceClass is volatile, then it must
6727 : * have come from an ORDER BY clause, and we have to match it to
6728 : * that same targetlist entry.
6729 : */
6730 25 : if (ec->ec_sortref == 0) /* can't happen */
6731 0 : elog(ERROR, "volatile EquivalenceClass has no sortref");
6732 25 : tle = get_sortgroupref_tle(ec->ec_sortref, plan->targetlist);
6733 : Assert(tle);
6734 : Assert(list_length(ec->ec_members) == 1);
6735 25 : pk_datatype = ((EquivalenceMember *) linitial(ec->ec_members))->em_datatype;
6736 : }
6737 : else
6738 : {
6739 : /*
6740 : * Otherwise, we can use any non-constant expression listed in the
6741 : * pathkey's EquivalenceClass. For now, we take the first tlist
6742 : * item found in the EC.
6743 : */
6744 20046 : foreach(j, plan->targetlist)
6745 : {
6746 20046 : tle = (TargetEntry *) lfirst(j);
6747 20046 : em = find_ec_member_matching_expr(ec, tle->expr, relids);
6748 20046 : if (em)
6749 : {
6750 : /* found expr already in tlist */
6751 10353 : pk_datatype = em->em_datatype;
6752 10353 : break;
6753 : }
6754 9693 : tle = NULL;
6755 : }
6756 : }
6757 :
6758 10378 : if (!tle)
6759 0 : elog(ERROR, "could not find pathkey item to sort");
6760 :
6761 : /*
6762 : * Look up the correct equality operator from the PathKey's slightly
6763 : * abstracted representation.
6764 : */
6765 10378 : eqop = get_opfamily_member_for_cmptype(pathkey->pk_opfamily,
6766 : pk_datatype,
6767 : pk_datatype,
6768 : COMPARE_EQ);
6769 10378 : if (!OidIsValid(eqop)) /* should not happen */
6770 0 : elog(ERROR, "missing operator %d(%u,%u) in opfamily %u",
6771 : COMPARE_EQ, pk_datatype, pk_datatype,
6772 : pathkey->pk_opfamily);
6773 :
6774 10378 : uniqColIdx[keyno] = tle->resno;
6775 10378 : uniqOperators[keyno] = eqop;
6776 10378 : uniqCollations[keyno] = ec->ec_collation;
6777 :
6778 10378 : keyno++;
6779 : }
6780 :
6781 4430 : node->numCols = numCols;
6782 4430 : node->uniqColIdx = uniqColIdx;
6783 4430 : node->uniqOperators = uniqOperators;
6784 4430 : node->uniqCollations = uniqCollations;
6785 :
6786 4430 : return node;
6787 : }
6788 :
6789 : static Gather *
6790 844 : make_gather(List *qptlist,
6791 : List *qpqual,
6792 : int nworkers,
6793 : int rescan_param,
6794 : bool single_copy,
6795 : Plan *subplan)
6796 : {
6797 844 : Gather *node = makeNode(Gather);
6798 844 : Plan *plan = &node->plan;
6799 :
6800 844 : plan->targetlist = qptlist;
6801 844 : plan->qual = qpqual;
6802 844 : plan->lefttree = subplan;
6803 844 : plan->righttree = NULL;
6804 844 : node->num_workers = nworkers;
6805 844 : node->rescan_param = rescan_param;
6806 844 : node->single_copy = single_copy;
6807 844 : node->invisible = false;
6808 844 : node->initParam = NULL;
6809 :
6810 844 : return node;
6811 : }
6812 :
6813 : /*
6814 : * groupList is a list of SortGroupClauses, identifying the targetlist
6815 : * items that should be considered by the SetOp filter. The input plans must
6816 : * already be sorted accordingly, if we're doing SETOP_SORTED mode.
6817 : */
6818 : static SetOp *
6819 599 : make_setop(SetOpCmd cmd, SetOpStrategy strategy,
6820 : List *tlist, Plan *lefttree, Plan *righttree,
6821 : List *groupList, Cardinality numGroups)
6822 : {
6823 599 : SetOp *node = makeNode(SetOp);
6824 599 : Plan *plan = &node->plan;
6825 599 : int numCols = list_length(groupList);
6826 599 : int keyno = 0;
6827 : AttrNumber *cmpColIdx;
6828 : Oid *cmpOperators;
6829 : Oid *cmpCollations;
6830 : bool *cmpNullsFirst;
6831 : ListCell *slitem;
6832 :
6833 599 : plan->targetlist = tlist;
6834 599 : plan->qual = NIL;
6835 599 : plan->lefttree = lefttree;
6836 599 : plan->righttree = righttree;
6837 :
6838 : /*
6839 : * convert SortGroupClause list into arrays of attr indexes and comparison
6840 : * operators, as wanted by executor
6841 : */
6842 599 : cmpColIdx = palloc_array(AttrNumber, numCols);
6843 599 : cmpOperators = palloc_array(Oid, numCols);
6844 599 : cmpCollations = palloc_array(Oid, numCols);
6845 599 : cmpNullsFirst = palloc_array(bool, numCols);
6846 :
6847 2841 : foreach(slitem, groupList)
6848 : {
6849 2242 : SortGroupClause *sortcl = (SortGroupClause *) lfirst(slitem);
6850 2242 : TargetEntry *tle = get_sortgroupclause_tle(sortcl, plan->targetlist);
6851 :
6852 2242 : cmpColIdx[keyno] = tle->resno;
6853 2242 : if (strategy == SETOP_HASHED)
6854 1897 : cmpOperators[keyno] = sortcl->eqop;
6855 : else
6856 345 : cmpOperators[keyno] = sortcl->sortop;
6857 : Assert(OidIsValid(cmpOperators[keyno]));
6858 2242 : cmpCollations[keyno] = exprCollation((Node *) tle->expr);
6859 2242 : cmpNullsFirst[keyno] = sortcl->nulls_first;
6860 2242 : keyno++;
6861 : }
6862 :
6863 599 : node->cmd = cmd;
6864 599 : node->strategy = strategy;
6865 599 : node->numCols = numCols;
6866 599 : node->cmpColIdx = cmpColIdx;
6867 599 : node->cmpOperators = cmpOperators;
6868 599 : node->cmpCollations = cmpCollations;
6869 599 : node->cmpNullsFirst = cmpNullsFirst;
6870 599 : node->numGroups = numGroups;
6871 :
6872 599 : return node;
6873 : }
6874 :
6875 : /*
6876 : * make_lockrows
6877 : * Build a LockRows plan node
6878 : */
6879 : static LockRows *
6880 8497 : make_lockrows(Plan *lefttree, List *rowMarks, int epqParam)
6881 : {
6882 8497 : LockRows *node = makeNode(LockRows);
6883 8497 : Plan *plan = &node->plan;
6884 :
6885 8497 : plan->targetlist = lefttree->targetlist;
6886 8497 : plan->qual = NIL;
6887 8497 : plan->lefttree = lefttree;
6888 8497 : plan->righttree = NULL;
6889 :
6890 8497 : node->rowMarks = rowMarks;
6891 8497 : node->epqParam = epqParam;
6892 :
6893 8497 : return node;
6894 : }
6895 :
6896 : /*
6897 : * make_limit
6898 : * Build a Limit plan node
6899 : */
6900 : Limit *
6901 3589 : make_limit(Plan *lefttree, Node *limitOffset, Node *limitCount,
6902 : LimitOption limitOption, int uniqNumCols, AttrNumber *uniqColIdx,
6903 : Oid *uniqOperators, Oid *uniqCollations)
6904 : {
6905 3589 : Limit *node = makeNode(Limit);
6906 3589 : Plan *plan = &node->plan;
6907 :
6908 3589 : plan->targetlist = lefttree->targetlist;
6909 3589 : plan->qual = NIL;
6910 3589 : plan->lefttree = lefttree;
6911 3589 : plan->righttree = NULL;
6912 :
6913 3589 : node->limitOffset = limitOffset;
6914 3589 : node->limitCount = limitCount;
6915 3589 : node->limitOption = limitOption;
6916 3589 : node->uniqNumCols = uniqNumCols;
6917 3589 : node->uniqColIdx = uniqColIdx;
6918 3589 : node->uniqOperators = uniqOperators;
6919 3589 : node->uniqCollations = uniqCollations;
6920 :
6921 3589 : return node;
6922 : }
6923 :
6924 : /*
6925 : * make_gating_result
6926 : * Build a Result plan node that performs projection of a subplan, and/or
6927 : * applies a one time filter (resconstantqual)
6928 : */
6929 : static Result *
6930 9784 : make_gating_result(List *tlist,
6931 : Node *resconstantqual,
6932 : Plan *subplan)
6933 : {
6934 9784 : Result *node = makeNode(Result);
6935 9784 : Plan *plan = &node->plan;
6936 :
6937 : Assert(subplan != NULL);
6938 :
6939 9784 : plan->targetlist = tlist;
6940 9784 : plan->qual = NIL;
6941 9784 : plan->lefttree = subplan;
6942 9784 : plan->righttree = NULL;
6943 9784 : node->result_type = RESULT_TYPE_GATING;
6944 9784 : node->resconstantqual = resconstantqual;
6945 9784 : node->relids = NULL;
6946 :
6947 9784 : return node;
6948 : }
6949 :
6950 : /*
6951 : * make_one_row_result
6952 : * Build a Result plan node that returns a single row (or possibly no rows,
6953 : * if the one-time filtered defined by resconstantqual returns false)
6954 : *
6955 : * 'rel' should be this path's RelOptInfo. In essence, we're saying that this
6956 : * Result node generates all the tuples for that RelOptInfo. Note that the same
6957 : * consideration can never arise in make_gating_result(), because in that case
6958 : * the tuples are always coming from some subordinate node.
6959 : */
6960 : static Result *
6961 141772 : make_one_row_result(List *tlist,
6962 : Node *resconstantqual,
6963 : RelOptInfo *rel)
6964 : {
6965 141772 : Result *node = makeNode(Result);
6966 141772 : Plan *plan = &node->plan;
6967 :
6968 141772 : plan->targetlist = tlist;
6969 141772 : plan->qual = NIL;
6970 141772 : plan->lefttree = NULL;
6971 141772 : plan->righttree = NULL;
6972 283178 : node->result_type = IS_UPPER_REL(rel) ? RESULT_TYPE_UPPER :
6973 141406 : IS_JOIN_REL(rel) ? RESULT_TYPE_JOIN : RESULT_TYPE_SCAN;
6974 141772 : node->resconstantqual = resconstantqual;
6975 141772 : node->relids = rel->relids;
6976 :
6977 141772 : return node;
6978 : }
6979 :
6980 : /*
6981 : * make_project_set
6982 : * Build a ProjectSet plan node
6983 : */
6984 : static ProjectSet *
6985 9895 : make_project_set(List *tlist,
6986 : Plan *subplan)
6987 : {
6988 9895 : ProjectSet *node = makeNode(ProjectSet);
6989 9895 : Plan *plan = &node->plan;
6990 :
6991 9895 : plan->targetlist = tlist;
6992 9895 : plan->qual = NIL;
6993 9895 : plan->lefttree = subplan;
6994 9895 : plan->righttree = NULL;
6995 :
6996 9895 : return node;
6997 : }
6998 :
6999 : /*
7000 : * make_modifytable
7001 : * Build a ModifyTable plan node
7002 : */
7003 : static ModifyTable *
7004 62779 : make_modifytable(PlannerInfo *root, Plan *subplan,
7005 : CmdType operation, bool canSetTag,
7006 : Index nominalRelation, Index rootRelation,
7007 : List *resultRelations,
7008 : List *updateColnosLists,
7009 : List *withCheckOptionLists, List *returningLists,
7010 : List *rowMarks, OnConflictExpr *onconflict,
7011 : List *mergeActionLists, List *mergeJoinConditions,
7012 : int epqParam)
7013 : {
7014 62779 : ModifyTable *node = makeNode(ModifyTable);
7015 62779 : bool returning_old_or_new = false;
7016 62779 : bool returning_old_or_new_valid = false;
7017 62779 : bool transition_tables = false;
7018 62779 : bool transition_tables_valid = false;
7019 : List *fdw_private_list;
7020 : Bitmapset *direct_modify_plans;
7021 : ListCell *lc;
7022 : int i;
7023 :
7024 : Assert(operation == CMD_MERGE ||
7025 : (operation == CMD_UPDATE ?
7026 : list_length(resultRelations) == list_length(updateColnosLists) :
7027 : updateColnosLists == NIL));
7028 : Assert(withCheckOptionLists == NIL ||
7029 : list_length(resultRelations) == list_length(withCheckOptionLists));
7030 : Assert(returningLists == NIL ||
7031 : list_length(resultRelations) == list_length(returningLists));
7032 :
7033 62779 : node->plan.lefttree = subplan;
7034 62779 : node->plan.righttree = NULL;
7035 62779 : node->plan.qual = NIL;
7036 : /* setrefs.c will fill in the targetlist, if needed */
7037 62779 : node->plan.targetlist = NIL;
7038 :
7039 62779 : node->operation = operation;
7040 62779 : node->canSetTag = canSetTag;
7041 62779 : node->nominalRelation = nominalRelation;
7042 62779 : node->rootRelation = rootRelation;
7043 62779 : node->resultRelations = resultRelations;
7044 62779 : if (!onconflict)
7045 : {
7046 61015 : node->onConflictAction = ONCONFLICT_NONE;
7047 61015 : node->onConflictLockStrength = LCS_NONE;
7048 61015 : node->onConflictSet = NIL;
7049 61015 : node->onConflictCols = NIL;
7050 61015 : node->onConflictWhere = NULL;
7051 61015 : node->arbiterIndexes = NIL;
7052 61015 : node->exclRelRTI = 0;
7053 61015 : node->exclRelTlist = NIL;
7054 : }
7055 : else
7056 : {
7057 1764 : node->onConflictAction = onconflict->action;
7058 :
7059 : /* Lock strength for ON CONFLICT DO SELECT [FOR UPDATE/SHARE] */
7060 1764 : node->onConflictLockStrength = onconflict->lockStrength;
7061 :
7062 : /*
7063 : * Here we convert the ON CONFLICT UPDATE tlist, if any, to the
7064 : * executor's convention of having consecutive resno's. The actual
7065 : * target column numbers are saved in node->onConflictCols. (This
7066 : * could be done earlier, but there seems no need to.)
7067 : */
7068 1764 : node->onConflictSet = onconflict->onConflictSet;
7069 1764 : node->onConflictCols =
7070 1764 : extract_update_targetlist_colnos(node->onConflictSet);
7071 1764 : node->onConflictWhere = onconflict->onConflictWhere;
7072 :
7073 : /*
7074 : * If a set of unique index inference elements was provided (an
7075 : * INSERT...ON CONFLICT "inference specification"), then infer
7076 : * appropriate unique indexes (or throw an error if none are
7077 : * available).
7078 : */
7079 1764 : node->arbiterIndexes = infer_arbiter_indexes(root);
7080 :
7081 1496 : node->exclRelRTI = onconflict->exclRelIndex;
7082 1496 : node->exclRelTlist = onconflict->exclRelTlist;
7083 : }
7084 62511 : node->updateColnosLists = updateColnosLists;
7085 62511 : node->withCheckOptionLists = withCheckOptionLists;
7086 62511 : node->returningOldAlias = root->parse->returningOldAlias;
7087 62511 : node->returningNewAlias = root->parse->returningNewAlias;
7088 62511 : node->returningLists = returningLists;
7089 62511 : node->rowMarks = rowMarks;
7090 62511 : node->mergeActionLists = mergeActionLists;
7091 62511 : node->mergeJoinConditions = mergeJoinConditions;
7092 62511 : node->epqParam = epqParam;
7093 :
7094 : /*
7095 : * For each result relation that is a foreign table, allow the FDW to
7096 : * construct private plan data, and accumulate it all into a list.
7097 : */
7098 62511 : fdw_private_list = NIL;
7099 62511 : direct_modify_plans = NULL;
7100 62511 : i = 0;
7101 127016 : foreach(lc, resultRelations)
7102 : {
7103 64507 : Index rti = lfirst_int(lc);
7104 : FdwRoutine *fdwroutine;
7105 : List *fdw_private;
7106 : bool direct_modify;
7107 :
7108 : /*
7109 : * If possible, we want to get the FdwRoutine from our RelOptInfo for
7110 : * the table. But sometimes we don't have a RelOptInfo and must get
7111 : * it the hard way. (In INSERT, the target relation is not scanned,
7112 : * so it's not a baserel; and there are also corner cases for
7113 : * updatable views where the target rel isn't a baserel.)
7114 : */
7115 64507 : if (rti < root->simple_rel_array_size &&
7116 64507 : root->simple_rel_array[rti] != NULL)
7117 16194 : {
7118 16194 : RelOptInfo *resultRel = root->simple_rel_array[rti];
7119 :
7120 16194 : fdwroutine = resultRel->fdwroutine;
7121 : }
7122 : else
7123 : {
7124 48313 : RangeTblEntry *rte = planner_rt_fetch(rti, root);
7125 :
7126 48313 : if (rte->rtekind == RTE_RELATION &&
7127 48313 : rte->relkind == RELKIND_FOREIGN_TABLE)
7128 : {
7129 : /* Check if the access to foreign tables is restricted */
7130 90 : if (unlikely((restrict_nonsystem_relation_kind & RESTRICT_RELKIND_FOREIGN_TABLE) != 0))
7131 : {
7132 : /* there must not be built-in foreign tables */
7133 : Assert(rte->relid >= FirstNormalObjectId);
7134 1 : ereport(ERROR,
7135 : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
7136 : errmsg("access to non-system foreign table is restricted")));
7137 : }
7138 :
7139 89 : fdwroutine = GetFdwRoutineByRelId(rte->relid);
7140 : }
7141 : else
7142 48223 : fdwroutine = NULL;
7143 : }
7144 :
7145 : /*
7146 : * MERGE is not currently supported for foreign tables. We already
7147 : * checked that when the table mentioned in the query is foreign; but
7148 : * we can still get here if a partitioned table has a foreign table as
7149 : * partition. Disallow that now, to avoid an uglier error message
7150 : * later.
7151 : */
7152 64506 : if (operation == CMD_MERGE && fdwroutine != NULL)
7153 : {
7154 1 : RangeTblEntry *rte = planner_rt_fetch(rti, root);
7155 :
7156 1 : ereport(ERROR,
7157 : errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
7158 : errmsg("cannot execute MERGE on relation \"%s\"",
7159 : get_rel_name(rte->relid)),
7160 : errdetail_relkind_not_supported(rte->relkind));
7161 : }
7162 :
7163 : /*
7164 : * Try to modify the foreign table directly if (1) the FDW provides
7165 : * callback functions needed for that and (2) there are no local
7166 : * structures that need to be run for each modified row: row-level
7167 : * triggers on the foreign table, stored generated columns, WITH CHECK
7168 : * OPTIONs from parent views, Vars returning OLD/NEW in the RETURNING
7169 : * list, or transition tables on the named relation.
7170 : */
7171 64505 : direct_modify = false;
7172 64505 : if (fdwroutine != NULL &&
7173 279 : fdwroutine->PlanDirectModify != NULL &&
7174 274 : fdwroutine->BeginDirectModify != NULL &&
7175 274 : fdwroutine->IterateDirectModify != NULL &&
7176 274 : fdwroutine->EndDirectModify != NULL &&
7177 258 : withCheckOptionLists == NIL &&
7178 258 : !has_row_triggers(root, rti, operation) &&
7179 219 : !has_stored_generated_columns(root, rti))
7180 : {
7181 : /*
7182 : * returning_old_or_new and transition_tables are the same for all
7183 : * result relations, respectively
7184 : */
7185 210 : if (!returning_old_or_new_valid)
7186 : {
7187 : returning_old_or_new =
7188 202 : contain_vars_returning_old_or_new((Node *)
7189 202 : root->parse->returningList);
7190 202 : returning_old_or_new_valid = true;
7191 : }
7192 210 : if (!returning_old_or_new)
7193 : {
7194 203 : if (!transition_tables_valid)
7195 : {
7196 195 : transition_tables = has_transition_tables(root,
7197 : nominalRelation,
7198 : operation);
7199 195 : transition_tables_valid = true;
7200 : }
7201 203 : if (!transition_tables)
7202 195 : direct_modify = fdwroutine->PlanDirectModify(root, node,
7203 : rti, i);
7204 : }
7205 : }
7206 64505 : if (direct_modify)
7207 104 : direct_modify_plans = bms_add_member(direct_modify_plans, i);
7208 :
7209 64505 : if (!direct_modify &&
7210 175 : fdwroutine != NULL &&
7211 175 : fdwroutine->PlanForeignModify != NULL)
7212 170 : fdw_private = fdwroutine->PlanForeignModify(root, node, rti, i);
7213 : else
7214 64335 : fdw_private = NIL;
7215 64505 : fdw_private_list = lappend(fdw_private_list, fdw_private);
7216 64505 : i++;
7217 : }
7218 62509 : node->fdwPrivLists = fdw_private_list;
7219 62509 : node->fdwDirectModifyPlans = direct_modify_plans;
7220 :
7221 62509 : return node;
7222 : }
7223 :
7224 : /*
7225 : * is_projection_capable_path
7226 : * Check whether a given Path node is able to do projection.
7227 : */
7228 : bool
7229 581232 : is_projection_capable_path(Path *path)
7230 : {
7231 : /* Most plan types can project, so just list the ones that can't */
7232 581232 : switch (path->pathtype)
7233 : {
7234 1026 : case T_Hash:
7235 : case T_Material:
7236 : case T_Memoize:
7237 : case T_Sort:
7238 : case T_IncrementalSort:
7239 : case T_Unique:
7240 : case T_SetOp:
7241 : case T_LockRows:
7242 : case T_Limit:
7243 : case T_ModifyTable:
7244 : case T_MergeAppend:
7245 : case T_RecursiveUnion:
7246 1026 : return false;
7247 0 : case T_CustomScan:
7248 0 : if (castNode(CustomPath, path)->flags & CUSTOMPATH_SUPPORT_PROJECTION)
7249 0 : return true;
7250 0 : return false;
7251 13876 : case T_Append:
7252 :
7253 : /*
7254 : * Append can't project, but if an AppendPath is being used to
7255 : * represent a dummy path, what will actually be generated is a
7256 : * Result which can project.
7257 : */
7258 13876 : return IS_DUMMY_APPEND(path);
7259 2125 : case T_ProjectSet:
7260 :
7261 : /*
7262 : * Although ProjectSet certainly projects, say "no" because we
7263 : * don't want the planner to randomly replace its tlist with
7264 : * something else; the SRFs have to stay at top level. This might
7265 : * get relaxed later.
7266 : */
7267 2125 : return false;
7268 564205 : default:
7269 564205 : break;
7270 : }
7271 564205 : return true;
7272 : }
7273 :
7274 : /*
7275 : * is_projection_capable_plan
7276 : * Check whether a given Plan node is able to do projection.
7277 : */
7278 : bool
7279 331 : is_projection_capable_plan(Plan *plan)
7280 : {
7281 : /* Most plan types can project, so just list the ones that can't */
7282 331 : switch (nodeTag(plan))
7283 : {
7284 30 : case T_Hash:
7285 : case T_Material:
7286 : case T_Memoize:
7287 : case T_Sort:
7288 : case T_Unique:
7289 : case T_SetOp:
7290 : case T_LockRows:
7291 : case T_Limit:
7292 : case T_ModifyTable:
7293 : case T_Append:
7294 : case T_MergeAppend:
7295 : case T_RecursiveUnion:
7296 30 : return false;
7297 0 : case T_CustomScan:
7298 0 : if (((CustomScan *) plan)->flags & CUSTOMPATH_SUPPORT_PROJECTION)
7299 0 : return true;
7300 0 : return false;
7301 0 : case T_ProjectSet:
7302 :
7303 : /*
7304 : * Although ProjectSet certainly projects, say "no" because we
7305 : * don't want the planner to randomly replace its tlist with
7306 : * something else; the SRFs have to stay at top level. This might
7307 : * get relaxed later.
7308 : */
7309 0 : return false;
7310 301 : default:
7311 301 : break;
7312 : }
7313 301 : return true;
7314 : }
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