Line data Source code
1 : /*-------------------------------------------------------------------------
2 : *
3 : * setrefs.c
4 : * Post-processing of a completed plan tree: fix references to subplan
5 : * vars, compute regproc values for operators, etc
6 : *
7 : * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
8 : * Portions Copyright (c) 1994, Regents of the University of California
9 : *
10 : *
11 : * IDENTIFICATION
12 : * src/backend/optimizer/plan/setrefs.c
13 : *
14 : *-------------------------------------------------------------------------
15 : */
16 : #include "postgres.h"
17 :
18 : #include "access/transam.h"
19 : #include "catalog/pg_type.h"
20 : #include "nodes/makefuncs.h"
21 : #include "nodes/nodeFuncs.h"
22 : #include "optimizer/optimizer.h"
23 : #include "optimizer/pathnode.h"
24 : #include "optimizer/planmain.h"
25 : #include "optimizer/planner.h"
26 : #include "optimizer/subselect.h"
27 : #include "optimizer/tlist.h"
28 : #include "parser/parse_relation.h"
29 : #include "rewrite/rewriteManip.h"
30 : #include "tcop/utility.h"
31 : #include "utils/syscache.h"
32 :
33 :
34 : typedef enum
35 : {
36 : NRM_EQUAL, /* expect exact match of nullingrels */
37 : NRM_SUBSET, /* actual Var may have a subset of input */
38 : NRM_SUPERSET, /* actual Var may have a superset of input */
39 : } NullingRelsMatch;
40 :
41 : typedef struct
42 : {
43 : int varno; /* RT index of Var */
44 : AttrNumber varattno; /* attr number of Var */
45 : AttrNumber resno; /* TLE position of Var */
46 : Bitmapset *varnullingrels; /* Var's varnullingrels */
47 : } tlist_vinfo;
48 :
49 : typedef struct
50 : {
51 : List *tlist; /* underlying target list */
52 : int num_vars; /* number of plain Var tlist entries */
53 : bool has_ph_vars; /* are there PlaceHolderVar entries? */
54 : bool has_non_vars; /* are there other entries? */
55 : tlist_vinfo vars[FLEXIBLE_ARRAY_MEMBER]; /* has num_vars entries */
56 : } indexed_tlist;
57 :
58 : typedef struct
59 : {
60 : PlannerInfo *root;
61 : int rtoffset;
62 : double num_exec;
63 : } fix_scan_expr_context;
64 :
65 : typedef struct
66 : {
67 : PlannerInfo *root;
68 : indexed_tlist *outer_itlist;
69 : indexed_tlist *inner_itlist;
70 : Index acceptable_rel;
71 : int rtoffset;
72 : NullingRelsMatch nrm_match;
73 : double num_exec;
74 : } fix_join_expr_context;
75 :
76 : typedef struct
77 : {
78 : PlannerInfo *root;
79 : indexed_tlist *subplan_itlist;
80 : int newvarno;
81 : int rtoffset;
82 : NullingRelsMatch nrm_match;
83 : double num_exec;
84 : } fix_upper_expr_context;
85 :
86 : typedef struct
87 : {
88 : PlannerInfo *root;
89 : indexed_tlist *subplan_itlist;
90 : int newvarno;
91 : } fix_windowagg_cond_context;
92 :
93 : /* Context info for flatten_rtes_walker() */
94 : typedef struct
95 : {
96 : PlannerGlobal *glob;
97 : Query *query;
98 : } flatten_rtes_walker_context;
99 :
100 : /*
101 : * Selecting the best alternative in an AlternativeSubPlan expression requires
102 : * estimating how many times that expression will be evaluated. For an
103 : * expression in a plan node's targetlist, the plan's estimated number of
104 : * output rows is clearly what to use, but for an expression in a qual it's
105 : * far less clear. Since AlternativeSubPlans aren't heavily used, we don't
106 : * want to expend a lot of cycles making such estimates. What we use is twice
107 : * the number of output rows. That's not entirely unfounded: we know that
108 : * clause_selectivity() would fall back to a default selectivity estimate
109 : * of 0.5 for any SubPlan, so if the qual containing the SubPlan is the last
110 : * to be applied (which it likely would be, thanks to order_qual_clauses()),
111 : * this matches what we could have estimated in a far more laborious fashion.
112 : * Obviously there are many other scenarios, but it's probably not worth the
113 : * trouble to try to improve on this estimate, especially not when we don't
114 : * have a better estimate for the selectivity of the SubPlan qual itself.
115 : */
116 : #define NUM_EXEC_TLIST(parentplan) ((parentplan)->plan_rows)
117 : #define NUM_EXEC_QUAL(parentplan) ((parentplan)->plan_rows * 2.0)
118 :
119 : /*
120 : * Check if a Const node is a regclass value. We accept plain OID too,
121 : * since a regclass Const will get folded to that type if it's an argument
122 : * to oideq or similar operators. (This might result in some extraneous
123 : * values in a plan's list of relation dependencies, but the worst result
124 : * would be occasional useless replans.)
125 : */
126 : #define ISREGCLASSCONST(con) \
127 : (((con)->consttype == REGCLASSOID || (con)->consttype == OIDOID) && \
128 : !(con)->constisnull)
129 :
130 : #define fix_scan_list(root, lst, rtoffset, num_exec) \
131 : ((List *) fix_scan_expr(root, (Node *) (lst), rtoffset, num_exec))
132 :
133 : static void add_rtes_to_flat_rtable(PlannerInfo *root, bool recursing);
134 : static void flatten_unplanned_rtes(PlannerGlobal *glob, RangeTblEntry *rte);
135 : static bool flatten_rtes_walker(Node *node, flatten_rtes_walker_context *cxt);
136 : static void add_rte_to_flat_rtable(PlannerGlobal *glob, List *rteperminfos,
137 : RangeTblEntry *rte);
138 : static Plan *set_plan_refs(PlannerInfo *root, Plan *plan, int rtoffset);
139 : static Plan *set_indexonlyscan_references(PlannerInfo *root,
140 : IndexOnlyScan *plan,
141 : int rtoffset);
142 : static Plan *set_subqueryscan_references(PlannerInfo *root,
143 : SubqueryScan *plan,
144 : int rtoffset);
145 : static Plan *clean_up_removed_plan_level(Plan *parent, Plan *child);
146 : static void set_foreignscan_references(PlannerInfo *root,
147 : ForeignScan *fscan,
148 : int rtoffset);
149 : static void set_customscan_references(PlannerInfo *root,
150 : CustomScan *cscan,
151 : int rtoffset);
152 : static Plan *set_append_references(PlannerInfo *root,
153 : Append *aplan,
154 : int rtoffset);
155 : static Plan *set_mergeappend_references(PlannerInfo *root,
156 : MergeAppend *mplan,
157 : int rtoffset);
158 : static void set_hash_references(PlannerInfo *root, Plan *plan, int rtoffset);
159 : static Relids offset_relid_set(Relids relids, int rtoffset);
160 : static Node *fix_scan_expr(PlannerInfo *root, Node *node,
161 : int rtoffset, double num_exec);
162 : static Node *fix_scan_expr_mutator(Node *node, fix_scan_expr_context *context);
163 : static bool fix_scan_expr_walker(Node *node, fix_scan_expr_context *context);
164 : static void set_join_references(PlannerInfo *root, Join *join, int rtoffset);
165 : static void set_upper_references(PlannerInfo *root, Plan *plan, int rtoffset);
166 : static void set_param_references(PlannerInfo *root, Plan *plan);
167 : static Node *convert_combining_aggrefs(Node *node, void *context);
168 : static void set_dummy_tlist_references(Plan *plan, int rtoffset);
169 : static indexed_tlist *build_tlist_index(List *tlist);
170 : static Var *search_indexed_tlist_for_var(Var *var,
171 : indexed_tlist *itlist,
172 : int newvarno,
173 : int rtoffset,
174 : NullingRelsMatch nrm_match);
175 : static Var *search_indexed_tlist_for_phv(PlaceHolderVar *phv,
176 : indexed_tlist *itlist,
177 : int newvarno,
178 : NullingRelsMatch nrm_match);
179 : static Var *search_indexed_tlist_for_non_var(Expr *node,
180 : indexed_tlist *itlist,
181 : int newvarno);
182 : static Var *search_indexed_tlist_for_sortgroupref(Expr *node,
183 : Index sortgroupref,
184 : indexed_tlist *itlist,
185 : int newvarno);
186 : static List *fix_join_expr(PlannerInfo *root,
187 : List *clauses,
188 : indexed_tlist *outer_itlist,
189 : indexed_tlist *inner_itlist,
190 : Index acceptable_rel,
191 : int rtoffset,
192 : NullingRelsMatch nrm_match,
193 : double num_exec);
194 : static Node *fix_join_expr_mutator(Node *node,
195 : fix_join_expr_context *context);
196 : static Node *fix_upper_expr(PlannerInfo *root,
197 : Node *node,
198 : indexed_tlist *subplan_itlist,
199 : int newvarno,
200 : int rtoffset,
201 : NullingRelsMatch nrm_match,
202 : double num_exec);
203 : static Node *fix_upper_expr_mutator(Node *node,
204 : fix_upper_expr_context *context);
205 : static List *set_returning_clause_references(PlannerInfo *root,
206 : List *rlist,
207 : Plan *topplan,
208 : Index resultRelation,
209 : int rtoffset);
210 : static List *set_windowagg_runcondition_references(PlannerInfo *root,
211 : List *runcondition,
212 : Plan *plan);
213 :
214 : static void record_elided_node(PlannerGlobal *glob, int plan_node_id,
215 : NodeTag elided_type, Bitmapset *relids);
216 :
217 :
218 : /*****************************************************************************
219 : *
220 : * SUBPLAN REFERENCES
221 : *
222 : *****************************************************************************/
223 :
224 : /*
225 : * set_plan_references
226 : *
227 : * This is the final processing pass of the planner/optimizer. The plan
228 : * tree is complete; we just have to adjust some representational details
229 : * for the convenience of the executor:
230 : *
231 : * 1. We flatten the various subquery rangetables into a single list, and
232 : * zero out RangeTblEntry fields that are not useful to the executor.
233 : *
234 : * 2. We adjust Vars in scan nodes to be consistent with the flat rangetable.
235 : *
236 : * 3. We adjust Vars in upper plan nodes to refer to the outputs of their
237 : * subplans.
238 : *
239 : * 4. Aggrefs in Agg plan nodes need to be adjusted in some cases involving
240 : * partial aggregation or minmax aggregate optimization.
241 : *
242 : * 5. PARAM_MULTIEXPR Params are replaced by regular PARAM_EXEC Params,
243 : * now that we have finished planning all MULTIEXPR subplans.
244 : *
245 : * 6. AlternativeSubPlan expressions are replaced by just one of their
246 : * alternatives, using an estimate of how many times they'll be executed.
247 : *
248 : * 7. We compute regproc OIDs for operators (ie, we look up the function
249 : * that implements each op).
250 : *
251 : * 8. We create lists of specific objects that the plan depends on.
252 : * This will be used by plancache.c to drive invalidation of cached plans.
253 : * Relation dependencies are represented by OIDs, and everything else by
254 : * PlanInvalItems (this distinction is motivated by the shared-inval APIs).
255 : * Currently, relations, user-defined functions, and domains are the only
256 : * types of objects that are explicitly tracked this way.
257 : *
258 : * 9. We assign every plan node in the tree a unique ID.
259 : *
260 : * We also perform one final optimization step, which is to delete
261 : * SubqueryScan, Append, and MergeAppend plan nodes that aren't doing
262 : * anything useful. The reason for doing this last is that
263 : * it can't readily be done before set_plan_references, because it would
264 : * break set_upper_references: the Vars in the child plan's top tlist
265 : * wouldn't match up with the Vars in the outer plan tree. A SubqueryScan
266 : * serves a necessary function as a buffer between outer query and subquery
267 : * variable numbering ... but after we've flattened the rangetable this is
268 : * no longer a problem, since then there's only one rtindex namespace.
269 : * Likewise, Append and MergeAppend buffer between the parent and child vars
270 : * of an appendrel, but we don't need to worry about that once we've done
271 : * set_plan_references.
272 : *
273 : * set_plan_references recursively traverses the whole plan tree.
274 : *
275 : * The return value is normally the same Plan node passed in, but can be
276 : * different when the passed-in Plan is a node we decide isn't needed.
277 : *
278 : * The flattened rangetable entries are appended to root->glob->finalrtable.
279 : * Also, rowmarks entries are appended to root->glob->finalrowmarks, and the
280 : * RT indexes of ModifyTable result relations to root->glob->resultRelations,
281 : * and flattened AppendRelInfos are appended to root->glob->appendRelations.
282 : * Plan dependencies are appended to root->glob->relationOids (for relations)
283 : * and root->glob->invalItems (for everything else).
284 : *
285 : * Notice that we modify Plan nodes in-place, but use expression_tree_mutator
286 : * to process targetlist and qual expressions. We can assume that the Plan
287 : * nodes were just built by the planner and are not multiply referenced, but
288 : * it's not so safe to assume that for expression tree nodes.
289 : */
290 : Plan *
291 274585 : set_plan_references(PlannerInfo *root, Plan *plan)
292 : {
293 : Plan *result;
294 274585 : PlannerGlobal *glob = root->glob;
295 274585 : int rtoffset = list_length(glob->finalrtable);
296 : ListCell *lc;
297 :
298 : /*
299 : * Add all the query's RTEs to the flattened rangetable. The live ones
300 : * will have their rangetable indexes increased by rtoffset. (Additional
301 : * RTEs, not referenced by the Plan tree, might get added after those.)
302 : */
303 274585 : add_rtes_to_flat_rtable(root, false);
304 :
305 : /*
306 : * Adjust RT indexes of PlanRowMarks and add to final rowmarks list
307 : */
308 284087 : foreach(lc, root->rowMarks)
309 : {
310 9502 : PlanRowMark *rc = lfirst_node(PlanRowMark, lc);
311 : PlanRowMark *newrc;
312 :
313 : /* sanity check on existing row marks */
314 : Assert(root->simple_rel_array[rc->rti] != NULL &&
315 : root->simple_rte_array[rc->rti] != NULL);
316 :
317 : /* flat copy is enough since all fields are scalars */
318 9502 : newrc = palloc_object(PlanRowMark);
319 9502 : memcpy(newrc, rc, sizeof(PlanRowMark));
320 :
321 : /* adjust indexes ... but *not* the rowmarkId */
322 9502 : newrc->rti += rtoffset;
323 9502 : newrc->prti += rtoffset;
324 :
325 9502 : glob->finalrowmarks = lappend(glob->finalrowmarks, newrc);
326 : }
327 :
328 : /*
329 : * Adjust RT indexes of AppendRelInfos and add to final appendrels list.
330 : * We assume the AppendRelInfos were built during planning and don't need
331 : * to be copied.
332 : */
333 304206 : foreach(lc, root->append_rel_list)
334 : {
335 29621 : AppendRelInfo *appinfo = lfirst_node(AppendRelInfo, lc);
336 :
337 : /* adjust RT indexes */
338 29621 : appinfo->parent_relid += rtoffset;
339 29621 : appinfo->child_relid += rtoffset;
340 :
341 : /*
342 : * Rather than adjust the translated_vars entries, just drop 'em.
343 : * Neither the executor nor EXPLAIN currently need that data.
344 : */
345 29621 : appinfo->translated_vars = NIL;
346 :
347 29621 : glob->appendRelations = lappend(glob->appendRelations, appinfo);
348 : }
349 :
350 : /* If needed, create workspace for processing AlternativeSubPlans */
351 274585 : if (root->hasAlternativeSubPlans)
352 : {
353 551 : root->isAltSubplan = (bool *)
354 551 : palloc0(list_length(glob->subplans) * sizeof(bool));
355 551 : root->isUsedSubplan = (bool *)
356 551 : palloc0(list_length(glob->subplans) * sizeof(bool));
357 : }
358 :
359 : /* Now fix the Plan tree */
360 274585 : result = set_plan_refs(root, plan, rtoffset);
361 :
362 : /*
363 : * If we have AlternativeSubPlans, it is likely that we now have some
364 : * unreferenced subplans in glob->subplans. To avoid expending cycles on
365 : * those subplans later, get rid of them by setting those list entries to
366 : * NULL. (Note: we can't do this immediately upon processing an
367 : * AlternativeSubPlan, because there may be multiple copies of the
368 : * AlternativeSubPlan, and they can get resolved differently.)
369 : */
370 274585 : if (root->hasAlternativeSubPlans)
371 : {
372 2673 : foreach(lc, glob->subplans)
373 : {
374 2122 : int ndx = foreach_current_index(lc);
375 :
376 : /*
377 : * If it was used by some AlternativeSubPlan in this query level,
378 : * but wasn't selected as best by any AlternativeSubPlan, then we
379 : * don't need it. Do not touch subplans that aren't parts of
380 : * AlternativeSubPlans.
381 : */
382 2122 : if (root->isAltSubplan[ndx] && !root->isUsedSubplan[ndx])
383 846 : lfirst(lc) = NULL;
384 : }
385 : }
386 :
387 274585 : return result;
388 : }
389 :
390 : /*
391 : * Extract RangeTblEntries from the plan's rangetable, and add to flat rtable
392 : *
393 : * This can recurse into subquery plans; "recursing" is true if so.
394 : *
395 : * This also seems like a good place to add the query's RTEPermissionInfos to
396 : * the flat rteperminfos.
397 : */
398 : static void
399 274716 : add_rtes_to_flat_rtable(PlannerInfo *root, bool recursing)
400 : {
401 274716 : PlannerGlobal *glob = root->glob;
402 : Index rti;
403 : ListCell *lc;
404 :
405 : /*
406 : * Record enough information to make it possible for code that looks at
407 : * the final range table to understand how it was constructed. (If
408 : * finalrtable is still NIL, then this is the very topmost PlannerInfo,
409 : * which will always have plan_name == NULL and rtoffset == 0; we omit the
410 : * degenerate list entry.)
411 : */
412 274716 : if (root->glob->finalrtable != NIL)
413 : {
414 42412 : SubPlanRTInfo *rtinfo = makeNode(SubPlanRTInfo);
415 :
416 42412 : rtinfo->plan_name = root->plan_name;
417 42412 : rtinfo->rtoffset = list_length(root->glob->finalrtable);
418 :
419 : /* When recursing = true, it's an unplanned or dummy subquery. */
420 42412 : rtinfo->dummy = recursing;
421 :
422 42412 : root->glob->subrtinfos = lappend(root->glob->subrtinfos, rtinfo);
423 : }
424 :
425 : /*
426 : * Add the query's own RTEs to the flattened rangetable.
427 : *
428 : * At top level, we must add all RTEs so that their indexes in the
429 : * flattened rangetable match up with their original indexes. When
430 : * recursing, we only care about extracting relation RTEs (and subquery
431 : * RTEs that were once relation RTEs).
432 : */
433 772516 : foreach(lc, root->parse->rtable)
434 : {
435 497800 : RangeTblEntry *rte = (RangeTblEntry *) lfirst(lc);
436 :
437 497800 : if (!recursing || rte->rtekind == RTE_RELATION ||
438 123 : (rte->rtekind == RTE_SUBQUERY && OidIsValid(rte->relid)))
439 497677 : add_rte_to_flat_rtable(glob, root->parse->rteperminfos, rte);
440 : }
441 :
442 : /*
443 : * If there are any dead subqueries, they are not referenced in the Plan
444 : * tree, so we must add RTEs contained in them to the flattened rtable
445 : * separately. (If we failed to do this, the executor would not perform
446 : * expected permission checks for tables mentioned in such subqueries.)
447 : *
448 : * Note: this pass over the rangetable can't be combined with the previous
449 : * one, because that would mess up the numbering of the live RTEs in the
450 : * flattened rangetable.
451 : */
452 274716 : rti = 1;
453 772516 : foreach(lc, root->parse->rtable)
454 : {
455 497800 : RangeTblEntry *rte = (RangeTblEntry *) lfirst(lc);
456 :
457 : /*
458 : * We should ignore inheritance-parent RTEs: their contents have been
459 : * pulled up into our rangetable already. Also ignore any subquery
460 : * RTEs without matching RelOptInfos, as they likewise have been
461 : * pulled up.
462 : */
463 497800 : if (rte->rtekind == RTE_SUBQUERY && !rte->inh &&
464 38928 : rti < root->simple_rel_array_size)
465 : {
466 38928 : RelOptInfo *rel = root->simple_rel_array[rti];
467 :
468 38928 : if (rel != NULL)
469 : {
470 : Assert(rel->relid == rti); /* sanity check on array */
471 :
472 : /*
473 : * The subquery might never have been planned at all, if it
474 : * was excluded on the basis of self-contradictory constraints
475 : * in our query level. In this case apply
476 : * flatten_unplanned_rtes.
477 : *
478 : * If it was planned but the result rel is dummy, we assume
479 : * that it has been omitted from our plan tree (see
480 : * set_subquery_pathlist), and recurse to pull up its RTEs.
481 : *
482 : * Otherwise, it should be represented by a SubqueryScan node
483 : * somewhere in our plan tree, and we'll pull up its RTEs when
484 : * we process that plan node.
485 : *
486 : * However, if we're recursing, then we should pull up RTEs
487 : * whether the subquery is dummy or not, because we've found
488 : * that some upper query level is treating this one as dummy,
489 : * and so we won't scan this level's plan tree at all.
490 : */
491 20225 : if (rel->subroot == NULL)
492 12 : flatten_unplanned_rtes(glob, rte);
493 40402 : else if (recursing ||
494 20189 : IS_DUMMY_REL(fetch_upper_rel(rel->subroot,
495 : UPPERREL_FINAL, NULL)))
496 131 : add_rtes_to_flat_rtable(rel->subroot, true);
497 : }
498 : }
499 497800 : rti++;
500 : }
501 274716 : }
502 :
503 : /*
504 : * Extract RangeTblEntries from a subquery that was never planned at all
505 : */
506 :
507 : static void
508 12 : flatten_unplanned_rtes(PlannerGlobal *glob, RangeTblEntry *rte)
509 : {
510 12 : flatten_rtes_walker_context cxt = {glob, rte->subquery};
511 :
512 : /* Use query_tree_walker to find all RTEs in the parse tree */
513 12 : (void) query_tree_walker(rte->subquery,
514 : flatten_rtes_walker,
515 : &cxt,
516 : QTW_EXAMINE_RTES_BEFORE);
517 12 : }
518 :
519 : static bool
520 300 : flatten_rtes_walker(Node *node, flatten_rtes_walker_context *cxt)
521 : {
522 300 : if (node == NULL)
523 174 : return false;
524 126 : if (IsA(node, RangeTblEntry))
525 : {
526 9 : RangeTblEntry *rte = (RangeTblEntry *) node;
527 :
528 : /* As above, we need only save relation RTEs and former relations */
529 9 : if (rte->rtekind == RTE_RELATION ||
530 0 : (rte->rtekind == RTE_SUBQUERY && OidIsValid(rte->relid)))
531 9 : add_rte_to_flat_rtable(cxt->glob, cxt->query->rteperminfos, rte);
532 9 : return false;
533 : }
534 117 : if (IsA(node, Query))
535 : {
536 : /*
537 : * Recurse into subselects. Must update cxt->query to this query so
538 : * that the rtable and rteperminfos correspond with each other.
539 : */
540 3 : Query *save_query = cxt->query;
541 : bool result;
542 :
543 3 : cxt->query = (Query *) node;
544 3 : result = query_tree_walker((Query *) node,
545 : flatten_rtes_walker,
546 : cxt,
547 : QTW_EXAMINE_RTES_BEFORE);
548 3 : cxt->query = save_query;
549 3 : return result;
550 : }
551 114 : return expression_tree_walker(node, flatten_rtes_walker, cxt);
552 : }
553 :
554 : /*
555 : * Add (a copy of) the given RTE to the final rangetable and also the
556 : * corresponding RTEPermissionInfo, if any, to final rteperminfos.
557 : *
558 : * In the flat rangetable, we zero out substructure pointers that are not
559 : * needed by the executor; this reduces the storage space and copying cost
560 : * for cached plans. We keep only the ctename, alias, eref Alias fields,
561 : * which are needed by EXPLAIN, and perminfoindex which is needed by the
562 : * executor to fetch the RTE's RTEPermissionInfo.
563 : */
564 : static void
565 497686 : add_rte_to_flat_rtable(PlannerGlobal *glob, List *rteperminfos,
566 : RangeTblEntry *rte)
567 : {
568 : RangeTblEntry *newrte;
569 :
570 : /* flat copy to duplicate all the scalar fields */
571 497686 : newrte = palloc_object(RangeTblEntry);
572 497686 : memcpy(newrte, rte, sizeof(RangeTblEntry));
573 :
574 : /* zap unneeded sub-structure */
575 497686 : newrte->tablesample = NULL;
576 497686 : newrte->subquery = NULL;
577 497686 : newrte->joinaliasvars = NIL;
578 497686 : newrte->joinleftcols = NIL;
579 497686 : newrte->joinrightcols = NIL;
580 497686 : newrte->join_using_alias = NULL;
581 497686 : newrte->functions = NIL;
582 497686 : newrte->tablefunc = NULL;
583 497686 : newrte->values_lists = NIL;
584 497686 : newrte->coltypes = NIL;
585 497686 : newrte->coltypmods = NIL;
586 497686 : newrte->colcollations = NIL;
587 497686 : newrte->groupexprs = NIL;
588 497686 : newrte->securityQuals = NIL;
589 :
590 497686 : glob->finalrtable = lappend(glob->finalrtable, newrte);
591 :
592 : /*
593 : * If it's a plain relation RTE (or a subquery that was once a view
594 : * reference), add the relation OID to relationOids. Also add its new RT
595 : * index to the set of relations to be potentially accessed during
596 : * execution.
597 : *
598 : * We do this even though the RTE might be unreferenced in the plan tree;
599 : * this would correspond to cases such as views that were expanded, child
600 : * tables that were eliminated by constraint exclusion, etc. Schema
601 : * invalidation on such a rel must still force rebuilding of the plan.
602 : *
603 : * Note we don't bother to avoid making duplicate list entries. We could,
604 : * but it would probably cost more cycles than it would save.
605 : */
606 497686 : if (newrte->rtekind == RTE_RELATION ||
607 229017 : (newrte->rtekind == RTE_SUBQUERY && OidIsValid(newrte->relid)))
608 : {
609 277054 : glob->relationOids = lappend_oid(glob->relationOids, newrte->relid);
610 277054 : glob->allRelids = bms_add_member(glob->allRelids,
611 277054 : list_length(glob->finalrtable));
612 : }
613 :
614 : /*
615 : * Add a copy of the RTEPermissionInfo, if any, corresponding to this RTE
616 : * to the flattened global list.
617 : */
618 497686 : if (rte->perminfoindex > 0)
619 : {
620 : RTEPermissionInfo *perminfo;
621 : RTEPermissionInfo *newperminfo;
622 :
623 : /* Get the existing one from this query's rteperminfos. */
624 255316 : perminfo = getRTEPermissionInfo(rteperminfos, newrte);
625 :
626 : /*
627 : * Add a new one to finalrteperminfos and copy the contents of the
628 : * existing one into it. Note that addRTEPermissionInfo() also
629 : * updates newrte->perminfoindex to point to newperminfo in
630 : * finalrteperminfos.
631 : */
632 255316 : newrte->perminfoindex = 0; /* expected by addRTEPermissionInfo() */
633 255316 : newperminfo = addRTEPermissionInfo(&glob->finalrteperminfos, newrte);
634 255316 : memcpy(newperminfo, perminfo, sizeof(RTEPermissionInfo));
635 : }
636 497686 : }
637 :
638 : /*
639 : * set_plan_refs: recurse through the Plan nodes of a single subquery level
640 : */
641 : static Plan *
642 1474619 : set_plan_refs(PlannerInfo *root, Plan *plan, int rtoffset)
643 : {
644 : ListCell *l;
645 :
646 1474619 : if (plan == NULL)
647 848662 : return NULL;
648 :
649 : /* Assign this node a unique ID. */
650 625957 : plan->plan_node_id = root->glob->lastPlanNodeId++;
651 :
652 : /*
653 : * Plan-type-specific fixes
654 : */
655 625957 : switch (nodeTag(plan))
656 : {
657 111544 : case T_SeqScan:
658 : {
659 111544 : SeqScan *splan = (SeqScan *) plan;
660 :
661 111544 : splan->scan.scanrelid += rtoffset;
662 111544 : splan->scan.plan.targetlist =
663 111544 : fix_scan_list(root, splan->scan.plan.targetlist,
664 : rtoffset, NUM_EXEC_TLIST(plan));
665 111544 : splan->scan.plan.qual =
666 111544 : fix_scan_list(root, splan->scan.plan.qual,
667 : rtoffset, NUM_EXEC_QUAL(plan));
668 : }
669 111544 : break;
670 153 : case T_SampleScan:
671 : {
672 153 : SampleScan *splan = (SampleScan *) plan;
673 :
674 153 : splan->scan.scanrelid += rtoffset;
675 153 : splan->scan.plan.targetlist =
676 153 : fix_scan_list(root, splan->scan.plan.targetlist,
677 : rtoffset, NUM_EXEC_TLIST(plan));
678 153 : splan->scan.plan.qual =
679 153 : fix_scan_list(root, splan->scan.plan.qual,
680 : rtoffset, NUM_EXEC_QUAL(plan));
681 153 : splan->tablesample = (TableSampleClause *)
682 153 : fix_scan_expr(root, (Node *) splan->tablesample,
683 : rtoffset, 1);
684 : }
685 153 : break;
686 72619 : case T_IndexScan:
687 : {
688 72619 : IndexScan *splan = (IndexScan *) plan;
689 :
690 72619 : splan->scan.scanrelid += rtoffset;
691 72619 : splan->scan.plan.targetlist =
692 72619 : fix_scan_list(root, splan->scan.plan.targetlist,
693 : rtoffset, NUM_EXEC_TLIST(plan));
694 72619 : splan->scan.plan.qual =
695 72619 : fix_scan_list(root, splan->scan.plan.qual,
696 : rtoffset, NUM_EXEC_QUAL(plan));
697 72619 : splan->indexqual =
698 72619 : fix_scan_list(root, splan->indexqual,
699 : rtoffset, 1);
700 72619 : splan->indexqualorig =
701 72619 : fix_scan_list(root, splan->indexqualorig,
702 : rtoffset, NUM_EXEC_QUAL(plan));
703 72619 : splan->indexorderby =
704 72619 : fix_scan_list(root, splan->indexorderby,
705 : rtoffset, 1);
706 72619 : splan->indexorderbyorig =
707 72619 : fix_scan_list(root, splan->indexorderbyorig,
708 : rtoffset, NUM_EXEC_QUAL(plan));
709 : }
710 72619 : break;
711 9260 : case T_IndexOnlyScan:
712 : {
713 9260 : IndexOnlyScan *splan = (IndexOnlyScan *) plan;
714 :
715 9260 : return set_indexonlyscan_references(root, splan, rtoffset);
716 : }
717 : break;
718 13651 : case T_BitmapIndexScan:
719 : {
720 13651 : BitmapIndexScan *splan = (BitmapIndexScan *) plan;
721 :
722 13651 : splan->scan.scanrelid += rtoffset;
723 : /* no need to fix targetlist and qual */
724 : Assert(splan->scan.plan.targetlist == NIL);
725 : Assert(splan->scan.plan.qual == NIL);
726 13651 : splan->indexqual =
727 13651 : fix_scan_list(root, splan->indexqual, rtoffset, 1);
728 13651 : splan->indexqualorig =
729 13651 : fix_scan_list(root, splan->indexqualorig,
730 : rtoffset, NUM_EXEC_QUAL(plan));
731 : }
732 13651 : break;
733 13304 : case T_BitmapHeapScan:
734 : {
735 13304 : BitmapHeapScan *splan = (BitmapHeapScan *) plan;
736 :
737 13304 : splan->scan.scanrelid += rtoffset;
738 13304 : splan->scan.plan.targetlist =
739 13304 : fix_scan_list(root, splan->scan.plan.targetlist,
740 : rtoffset, NUM_EXEC_TLIST(plan));
741 13304 : splan->scan.plan.qual =
742 13304 : fix_scan_list(root, splan->scan.plan.qual,
743 : rtoffset, NUM_EXEC_QUAL(plan));
744 13304 : splan->bitmapqualorig =
745 13304 : fix_scan_list(root, splan->bitmapqualorig,
746 : rtoffset, NUM_EXEC_QUAL(plan));
747 : }
748 13304 : break;
749 376 : case T_TidScan:
750 : {
751 376 : TidScan *splan = (TidScan *) plan;
752 :
753 376 : splan->scan.scanrelid += rtoffset;
754 376 : splan->scan.plan.targetlist =
755 376 : fix_scan_list(root, splan->scan.plan.targetlist,
756 : rtoffset, NUM_EXEC_TLIST(plan));
757 376 : splan->scan.plan.qual =
758 376 : fix_scan_list(root, splan->scan.plan.qual,
759 : rtoffset, NUM_EXEC_QUAL(plan));
760 376 : splan->tidquals =
761 376 : fix_scan_list(root, splan->tidquals,
762 : rtoffset, 1);
763 : }
764 376 : break;
765 1002 : case T_TidRangeScan:
766 : {
767 1002 : TidRangeScan *splan = (TidRangeScan *) plan;
768 :
769 1002 : splan->scan.scanrelid += rtoffset;
770 1002 : splan->scan.plan.targetlist =
771 1002 : fix_scan_list(root, splan->scan.plan.targetlist,
772 : rtoffset, NUM_EXEC_TLIST(plan));
773 1002 : splan->scan.plan.qual =
774 1002 : fix_scan_list(root, splan->scan.plan.qual,
775 : rtoffset, NUM_EXEC_QUAL(plan));
776 1002 : splan->tidrangequals =
777 1002 : fix_scan_list(root, splan->tidrangequals,
778 : rtoffset, 1);
779 : }
780 1002 : break;
781 20064 : case T_SubqueryScan:
782 : /* Needs special treatment, see comments below */
783 20064 : return set_subqueryscan_references(root,
784 : (SubqueryScan *) plan,
785 : rtoffset);
786 26432 : case T_FunctionScan:
787 : {
788 26432 : FunctionScan *splan = (FunctionScan *) plan;
789 :
790 26432 : splan->scan.scanrelid += rtoffset;
791 26432 : splan->scan.plan.targetlist =
792 26432 : fix_scan_list(root, splan->scan.plan.targetlist,
793 : rtoffset, NUM_EXEC_TLIST(plan));
794 26432 : splan->scan.plan.qual =
795 26432 : fix_scan_list(root, splan->scan.plan.qual,
796 : rtoffset, NUM_EXEC_QUAL(plan));
797 26432 : splan->functions =
798 26432 : fix_scan_list(root, splan->functions, rtoffset, 1);
799 : }
800 26432 : break;
801 313 : case T_TableFuncScan:
802 : {
803 313 : TableFuncScan *splan = (TableFuncScan *) plan;
804 :
805 313 : splan->scan.scanrelid += rtoffset;
806 313 : splan->scan.plan.targetlist =
807 313 : fix_scan_list(root, splan->scan.plan.targetlist,
808 : rtoffset, NUM_EXEC_TLIST(plan));
809 313 : splan->scan.plan.qual =
810 313 : fix_scan_list(root, splan->scan.plan.qual,
811 : rtoffset, NUM_EXEC_QUAL(plan));
812 313 : splan->tablefunc = (TableFunc *)
813 313 : fix_scan_expr(root, (Node *) splan->tablefunc,
814 : rtoffset, 1);
815 : }
816 313 : break;
817 4292 : case T_ValuesScan:
818 : {
819 4292 : ValuesScan *splan = (ValuesScan *) plan;
820 :
821 4292 : splan->scan.scanrelid += rtoffset;
822 4292 : splan->scan.plan.targetlist =
823 4292 : fix_scan_list(root, splan->scan.plan.targetlist,
824 : rtoffset, NUM_EXEC_TLIST(plan));
825 4292 : splan->scan.plan.qual =
826 4292 : fix_scan_list(root, splan->scan.plan.qual,
827 : rtoffset, NUM_EXEC_QUAL(plan));
828 4292 : splan->values_lists =
829 4292 : fix_scan_list(root, splan->values_lists,
830 : rtoffset, 1);
831 : }
832 4292 : break;
833 2224 : case T_CteScan:
834 : {
835 2224 : CteScan *splan = (CteScan *) plan;
836 :
837 2224 : splan->scan.scanrelid += rtoffset;
838 2224 : splan->scan.plan.targetlist =
839 2224 : fix_scan_list(root, splan->scan.plan.targetlist,
840 : rtoffset, NUM_EXEC_TLIST(plan));
841 2224 : splan->scan.plan.qual =
842 2224 : fix_scan_list(root, splan->scan.plan.qual,
843 : rtoffset, NUM_EXEC_QUAL(plan));
844 : }
845 2224 : break;
846 237 : case T_NamedTuplestoreScan:
847 : {
848 237 : NamedTuplestoreScan *splan = (NamedTuplestoreScan *) plan;
849 :
850 237 : splan->scan.scanrelid += rtoffset;
851 237 : splan->scan.plan.targetlist =
852 237 : fix_scan_list(root, splan->scan.plan.targetlist,
853 : rtoffset, NUM_EXEC_TLIST(plan));
854 237 : splan->scan.plan.qual =
855 237 : fix_scan_list(root, splan->scan.plan.qual,
856 : rtoffset, NUM_EXEC_QUAL(plan));
857 : }
858 237 : break;
859 468 : case T_WorkTableScan:
860 : {
861 468 : WorkTableScan *splan = (WorkTableScan *) plan;
862 :
863 468 : splan->scan.scanrelid += rtoffset;
864 468 : splan->scan.plan.targetlist =
865 468 : fix_scan_list(root, splan->scan.plan.targetlist,
866 : rtoffset, NUM_EXEC_TLIST(plan));
867 468 : splan->scan.plan.qual =
868 468 : fix_scan_list(root, splan->scan.plan.qual,
869 : rtoffset, NUM_EXEC_QUAL(plan));
870 : }
871 468 : break;
872 1024 : case T_ForeignScan:
873 1024 : set_foreignscan_references(root, (ForeignScan *) plan, rtoffset);
874 1024 : break;
875 0 : case T_CustomScan:
876 0 : set_customscan_references(root, (CustomScan *) plan, rtoffset);
877 0 : break;
878 :
879 72378 : case T_NestLoop:
880 : case T_MergeJoin:
881 : case T_HashJoin:
882 72378 : set_join_references(root, (Join *) plan, rtoffset);
883 72378 : break;
884 :
885 753 : case T_Gather:
886 : case T_GatherMerge:
887 : {
888 753 : set_upper_references(root, plan, rtoffset);
889 753 : set_param_references(root, plan);
890 : }
891 753 : break;
892 :
893 17804 : case T_Hash:
894 17804 : set_hash_references(root, plan, rtoffset);
895 17804 : break;
896 :
897 992 : case T_Memoize:
898 : {
899 992 : Memoize *mplan = (Memoize *) plan;
900 :
901 : /*
902 : * Memoize does not evaluate its targetlist. It just uses the
903 : * same targetlist from its outer subnode.
904 : */
905 992 : set_dummy_tlist_references(plan, rtoffset);
906 :
907 992 : mplan->param_exprs = fix_scan_list(root, mplan->param_exprs,
908 : rtoffset,
909 : NUM_EXEC_TLIST(plan));
910 992 : break;
911 : }
912 :
913 46570 : case T_Material:
914 : case T_Sort:
915 : case T_IncrementalSort:
916 : case T_Unique:
917 : case T_SetOp:
918 :
919 : /*
920 : * These plan types don't actually bother to evaluate their
921 : * targetlists, because they just return their unmodified input
922 : * tuples. Even though the targetlist won't be used by the
923 : * executor, we fix it up for possible use by EXPLAIN (not to
924 : * mention ease of debugging --- wrong varnos are very confusing).
925 : */
926 46570 : set_dummy_tlist_references(plan, rtoffset);
927 :
928 : /*
929 : * Since these plan types don't check quals either, we should not
930 : * find any qual expression attached to them.
931 : */
932 : Assert(plan->qual == NIL);
933 46570 : break;
934 6774 : case T_LockRows:
935 : {
936 6774 : LockRows *splan = (LockRows *) plan;
937 :
938 : /*
939 : * Like the plan types above, LockRows doesn't evaluate its
940 : * tlist or quals. But we have to fix up the RT indexes in
941 : * its rowmarks.
942 : */
943 6774 : set_dummy_tlist_references(plan, rtoffset);
944 : Assert(splan->plan.qual == NIL);
945 :
946 14779 : foreach(l, splan->rowMarks)
947 : {
948 8005 : PlanRowMark *rc = (PlanRowMark *) lfirst(l);
949 :
950 8005 : rc->rti += rtoffset;
951 8005 : rc->prti += rtoffset;
952 : }
953 : }
954 6774 : break;
955 2543 : case T_Limit:
956 : {
957 2543 : Limit *splan = (Limit *) plan;
958 :
959 : /*
960 : * Like the plan types above, Limit doesn't evaluate its tlist
961 : * or quals. It does have live expressions for limit/offset,
962 : * however; and those cannot contain subplan variable refs, so
963 : * fix_scan_expr works for them.
964 : */
965 2543 : set_dummy_tlist_references(plan, rtoffset);
966 : Assert(splan->plan.qual == NIL);
967 :
968 2543 : splan->limitOffset =
969 2543 : fix_scan_expr(root, splan->limitOffset, rtoffset, 1);
970 2543 : splan->limitCount =
971 2543 : fix_scan_expr(root, splan->limitCount, rtoffset, 1);
972 : }
973 2543 : break;
974 24812 : case T_Agg:
975 : {
976 24812 : Agg *agg = (Agg *) plan;
977 :
978 : /*
979 : * If this node is combining partial-aggregation results, we
980 : * must convert its Aggrefs to contain references to the
981 : * partial-aggregate subexpressions that will be available
982 : * from the child plan node.
983 : */
984 24812 : if (DO_AGGSPLIT_COMBINE(agg->aggsplit))
985 : {
986 703 : plan->targetlist = (List *)
987 703 : convert_combining_aggrefs((Node *) plan->targetlist,
988 : NULL);
989 703 : plan->qual = (List *)
990 703 : convert_combining_aggrefs((Node *) plan->qual,
991 : NULL);
992 : }
993 :
994 24812 : set_upper_references(root, plan, rtoffset);
995 : }
996 24812 : break;
997 123 : case T_Group:
998 123 : set_upper_references(root, plan, rtoffset);
999 123 : break;
1000 1431 : case T_WindowAgg:
1001 : {
1002 1431 : WindowAgg *wplan = (WindowAgg *) plan;
1003 :
1004 : /*
1005 : * Adjust the WindowAgg's run conditions by swapping the
1006 : * WindowFuncs references out to instead reference the Var in
1007 : * the scan slot so that when the executor evaluates the
1008 : * runCondition, it receives the WindowFunc's value from the
1009 : * slot that the result has just been stored into rather than
1010 : * evaluating the WindowFunc all over again.
1011 : */
1012 1431 : wplan->runCondition = set_windowagg_runcondition_references(root,
1013 : wplan->runCondition,
1014 : (Plan *) wplan);
1015 :
1016 1431 : set_upper_references(root, plan, rtoffset);
1017 :
1018 : /*
1019 : * Like Limit node limit/offset expressions, WindowAgg has
1020 : * frame offset expressions, which cannot contain subplan
1021 : * variable refs, so fix_scan_expr works for them.
1022 : */
1023 1431 : wplan->startOffset =
1024 1431 : fix_scan_expr(root, wplan->startOffset, rtoffset, 1);
1025 1431 : wplan->endOffset =
1026 1431 : fix_scan_expr(root, wplan->endOffset, rtoffset, 1);
1027 1431 : wplan->runCondition = fix_scan_list(root,
1028 : wplan->runCondition,
1029 : rtoffset,
1030 : NUM_EXEC_TLIST(plan));
1031 1431 : wplan->runConditionOrig = fix_scan_list(root,
1032 : wplan->runConditionOrig,
1033 : rtoffset,
1034 : NUM_EXEC_TLIST(plan));
1035 : }
1036 1431 : break;
1037 108483 : case T_Result:
1038 : {
1039 108483 : Result *splan = (Result *) plan;
1040 :
1041 : /*
1042 : * Result may or may not have a subplan; if not, it's more
1043 : * like a scan node than an upper node.
1044 : */
1045 108483 : if (splan->plan.lefttree != NULL)
1046 6035 : set_upper_references(root, plan, rtoffset);
1047 : else
1048 : {
1049 : /*
1050 : * The tlist of a childless Result could contain
1051 : * unresolved ROWID_VAR Vars, in case it's representing a
1052 : * target relation which is completely empty because of
1053 : * constraint exclusion. Replace any such Vars by null
1054 : * constants, as though they'd been resolved for a leaf
1055 : * scan node that doesn't support them. We could have
1056 : * fix_scan_expr do this, but since the case is only
1057 : * expected to occur here, it seems safer to special-case
1058 : * it here and keep the assertions that ROWID_VARs
1059 : * shouldn't be seen by fix_scan_expr.
1060 : *
1061 : * We also must handle the case where set operations have
1062 : * been short-circuited resulting in a dummy Result node.
1063 : * prepunion.c uses varno==0 for the set op targetlist.
1064 : * See generate_setop_tlist() and generate_setop_tlist().
1065 : * Here we rewrite these to use varno==1, which is the
1066 : * varno of the first set-op child. Without this, EXPLAIN
1067 : * will have trouble displaying targetlists of dummy set
1068 : * operations.
1069 : */
1070 238641 : foreach(l, splan->plan.targetlist)
1071 : {
1072 136193 : TargetEntry *tle = (TargetEntry *) lfirst(l);
1073 136193 : Var *var = (Var *) tle->expr;
1074 :
1075 136193 : if (var && IsA(var, Var))
1076 : {
1077 932 : if (var->varno == ROWID_VAR)
1078 40 : tle->expr = (Expr *) makeNullConst(var->vartype,
1079 : var->vartypmod,
1080 : var->varcollid);
1081 892 : else if (var->varno == 0)
1082 15 : tle->expr = (Expr *) makeVar(1,
1083 15 : var->varattno,
1084 : var->vartype,
1085 : var->vartypmod,
1086 : var->varcollid,
1087 : var->varlevelsup);
1088 : }
1089 : }
1090 :
1091 102448 : splan->plan.targetlist =
1092 102448 : fix_scan_list(root, splan->plan.targetlist,
1093 : rtoffset, NUM_EXEC_TLIST(plan));
1094 102448 : splan->plan.qual =
1095 102448 : fix_scan_list(root, splan->plan.qual,
1096 : rtoffset, NUM_EXEC_QUAL(plan));
1097 : }
1098 : /* resconstantqual can't contain any subplan variable refs */
1099 108483 : splan->resconstantqual =
1100 108483 : fix_scan_expr(root, splan->resconstantqual, rtoffset, 1);
1101 : /* adjust the relids set */
1102 108483 : splan->relids = offset_relid_set(splan->relids, rtoffset);
1103 : }
1104 108483 : break;
1105 6041 : case T_ProjectSet:
1106 6041 : set_upper_references(root, plan, rtoffset);
1107 6041 : break;
1108 46738 : case T_ModifyTable:
1109 : {
1110 46738 : ModifyTable *splan = (ModifyTable *) plan;
1111 46738 : Plan *subplan = outerPlan(splan);
1112 :
1113 : Assert(splan->plan.targetlist == NIL);
1114 : Assert(splan->plan.qual == NIL);
1115 :
1116 46738 : splan->withCheckOptionLists =
1117 46738 : fix_scan_list(root, splan->withCheckOptionLists,
1118 : rtoffset, 1);
1119 :
1120 46738 : if (splan->returningLists)
1121 : {
1122 1700 : List *newRL = NIL;
1123 : ListCell *lcrl,
1124 : *lcrr;
1125 :
1126 : /*
1127 : * Pass each per-resultrel returningList through
1128 : * set_returning_clause_references().
1129 : */
1130 : Assert(list_length(splan->returningLists) == list_length(splan->resultRelations));
1131 3596 : forboth(lcrl, splan->returningLists,
1132 : lcrr, splan->resultRelations)
1133 : {
1134 1896 : List *rlist = (List *) lfirst(lcrl);
1135 1896 : Index resultrel = lfirst_int(lcrr);
1136 :
1137 1896 : rlist = set_returning_clause_references(root,
1138 : rlist,
1139 : subplan,
1140 : resultrel,
1141 : rtoffset);
1142 1896 : newRL = lappend(newRL, rlist);
1143 : }
1144 1700 : splan->returningLists = newRL;
1145 :
1146 : /*
1147 : * Set up the visible plan targetlist as being the same as
1148 : * the first RETURNING list. This is mostly for the use
1149 : * of EXPLAIN; the executor won't execute that targetlist,
1150 : * although it does use it to prepare the node's result
1151 : * tuple slot. We postpone this step until here so that
1152 : * we don't have to do set_returning_clause_references()
1153 : * twice on identical targetlists.
1154 : */
1155 1700 : splan->plan.targetlist = copyObject(linitial(newRL));
1156 : }
1157 :
1158 : /*
1159 : * We treat ModifyTable with ON CONFLICT as a form of 'pseudo
1160 : * join', where the inner side is the EXCLUDED tuple.
1161 : * Therefore use fix_join_expr to setup the relevant variables
1162 : * to INNER_VAR. We explicitly don't create any OUTER_VARs as
1163 : * those are already used by RETURNING and it seems better to
1164 : * be non-conflicting.
1165 : */
1166 46738 : if (splan->onConflictAction == ONCONFLICT_UPDATE ||
1167 46212 : splan->onConflictAction == ONCONFLICT_SELECT)
1168 : {
1169 : indexed_tlist *itlist;
1170 :
1171 703 : itlist = build_tlist_index(splan->exclRelTlist);
1172 :
1173 703 : splan->onConflictSet =
1174 1406 : fix_join_expr(root, splan->onConflictSet,
1175 : NULL, itlist,
1176 703 : linitial_int(splan->resultRelations),
1177 703 : rtoffset, NRM_EQUAL, NUM_EXEC_QUAL(plan));
1178 :
1179 703 : splan->onConflictWhere = (Node *)
1180 1406 : fix_join_expr(root, (List *) splan->onConflictWhere,
1181 : NULL, itlist,
1182 703 : linitial_int(splan->resultRelations),
1183 703 : rtoffset, NRM_EQUAL, NUM_EXEC_QUAL(plan));
1184 :
1185 703 : pfree(itlist);
1186 :
1187 703 : splan->exclRelTlist =
1188 703 : fix_scan_list(root, splan->exclRelTlist, rtoffset, 1);
1189 : }
1190 :
1191 : /*
1192 : * The MERGE statement produces the target rows by performing
1193 : * a right join between the target relation and the source
1194 : * relation (which could be a plain relation or a subquery).
1195 : * The INSERT and UPDATE actions of the MERGE statement
1196 : * require access to the columns from the source relation. We
1197 : * arrange things so that the source relation attributes are
1198 : * available as INNER_VAR and the target relation attributes
1199 : * are available from the scan tuple.
1200 : */
1201 46738 : if (splan->mergeActionLists != NIL)
1202 : {
1203 926 : List *newMJC = NIL;
1204 : ListCell *lca,
1205 : *lcj,
1206 : *lcr;
1207 :
1208 : /*
1209 : * Fix the targetList of individual action nodes so that
1210 : * the so-called "source relation" Vars are referenced as
1211 : * INNER_VAR. Note that for this to work correctly during
1212 : * execution, the ecxt_innertuple must be set to the tuple
1213 : * obtained by executing the subplan, which is what
1214 : * constitutes the "source relation".
1215 : *
1216 : * We leave the Vars from the result relation (i.e. the
1217 : * target relation) unchanged i.e. those Vars would be
1218 : * picked from the scan slot. So during execution, we must
1219 : * ensure that ecxt_scantuple is setup correctly to refer
1220 : * to the tuple from the target relation.
1221 : */
1222 : indexed_tlist *itlist;
1223 :
1224 926 : itlist = build_tlist_index(subplan->targetlist);
1225 :
1226 1997 : forthree(lca, splan->mergeActionLists,
1227 : lcj, splan->mergeJoinConditions,
1228 : lcr, splan->resultRelations)
1229 : {
1230 1071 : List *mergeActionList = lfirst(lca);
1231 1071 : Node *mergeJoinCondition = lfirst(lcj);
1232 1071 : Index resultrel = lfirst_int(lcr);
1233 :
1234 2860 : foreach(l, mergeActionList)
1235 : {
1236 1789 : MergeAction *action = (MergeAction *) lfirst(l);
1237 :
1238 : /* Fix targetList of each action. */
1239 1789 : action->targetList = fix_join_expr(root,
1240 : action->targetList,
1241 : NULL, itlist,
1242 : resultrel,
1243 : rtoffset,
1244 : NRM_EQUAL,
1245 : NUM_EXEC_TLIST(plan));
1246 :
1247 : /* Fix quals too. */
1248 1789 : action->qual = (Node *) fix_join_expr(root,
1249 1789 : (List *) action->qual,
1250 : NULL, itlist,
1251 : resultrel,
1252 : rtoffset,
1253 : NRM_EQUAL,
1254 1789 : NUM_EXEC_QUAL(plan));
1255 : }
1256 :
1257 : /* Fix join condition too. */
1258 : mergeJoinCondition = (Node *)
1259 1071 : fix_join_expr(root,
1260 : (List *) mergeJoinCondition,
1261 : NULL, itlist,
1262 : resultrel,
1263 : rtoffset,
1264 : NRM_EQUAL,
1265 1071 : NUM_EXEC_QUAL(plan));
1266 1071 : newMJC = lappend(newMJC, mergeJoinCondition);
1267 : }
1268 926 : splan->mergeJoinConditions = newMJC;
1269 : }
1270 :
1271 46738 : splan->nominalRelation += rtoffset;
1272 46738 : if (splan->rootRelation)
1273 1457 : splan->rootRelation += rtoffset;
1274 46738 : splan->exclRelRTI += rtoffset;
1275 :
1276 94724 : foreach(l, splan->resultRelations)
1277 : {
1278 47986 : lfirst_int(l) += rtoffset;
1279 : }
1280 48215 : foreach(l, splan->rowMarks)
1281 : {
1282 1477 : PlanRowMark *rc = (PlanRowMark *) lfirst(l);
1283 :
1284 1477 : rc->rti += rtoffset;
1285 1477 : rc->prti += rtoffset;
1286 : }
1287 :
1288 : /*
1289 : * Append this ModifyTable node's final result relation RT
1290 : * index(es) to the global list for the plan.
1291 : */
1292 93476 : root->glob->resultRelations =
1293 46738 : list_concat(root->glob->resultRelations,
1294 46738 : splan->resultRelations);
1295 46738 : if (splan->rootRelation)
1296 : {
1297 1457 : root->glob->resultRelations =
1298 1457 : lappend_int(root->glob->resultRelations,
1299 1457 : splan->rootRelation);
1300 : }
1301 : }
1302 46738 : break;
1303 12451 : case T_Append:
1304 : /* Needs special treatment, see comments below */
1305 12451 : return set_append_references(root,
1306 : (Append *) plan,
1307 : rtoffset);
1308 289 : case T_MergeAppend:
1309 : /* Needs special treatment, see comments below */
1310 289 : return set_mergeappend_references(root,
1311 : (MergeAppend *) plan,
1312 : rtoffset);
1313 468 : case T_RecursiveUnion:
1314 : /* This doesn't evaluate targetlist or check quals either */
1315 468 : set_dummy_tlist_references(plan, rtoffset);
1316 : Assert(plan->qual == NIL);
1317 468 : break;
1318 127 : case T_BitmapAnd:
1319 : {
1320 127 : BitmapAnd *splan = (BitmapAnd *) plan;
1321 :
1322 : /* BitmapAnd works like Append, but has no tlist */
1323 : Assert(splan->plan.targetlist == NIL);
1324 : Assert(splan->plan.qual == NIL);
1325 381 : foreach(l, splan->bitmapplans)
1326 : {
1327 254 : lfirst(l) = set_plan_refs(root,
1328 254 : (Plan *) lfirst(l),
1329 : rtoffset);
1330 : }
1331 : }
1332 127 : break;
1333 217 : case T_BitmapOr:
1334 : {
1335 217 : BitmapOr *splan = (BitmapOr *) plan;
1336 :
1337 : /* BitmapOr works like Append, but has no tlist */
1338 : Assert(splan->plan.targetlist == NIL);
1339 : Assert(splan->plan.qual == NIL);
1340 654 : foreach(l, splan->bitmapplans)
1341 : {
1342 437 : lfirst(l) = set_plan_refs(root,
1343 437 : (Plan *) lfirst(l),
1344 : rtoffset);
1345 : }
1346 : }
1347 217 : break;
1348 0 : default:
1349 0 : elog(ERROR, "unrecognized node type: %d",
1350 : (int) nodeTag(plan));
1351 : break;
1352 : }
1353 :
1354 : /*
1355 : * Now recurse into child plans, if any
1356 : *
1357 : * NOTE: it is essential that we recurse into child plans AFTER we set
1358 : * subplan references in this plan's tlist and quals. If we did the
1359 : * reference-adjustments bottom-up, then we would fail to match this
1360 : * plan's var nodes against the already-modified nodes of the children.
1361 : */
1362 583893 : plan->lefttree = set_plan_refs(root, plan->lefttree, rtoffset);
1363 583893 : plan->righttree = set_plan_refs(root, plan->righttree, rtoffset);
1364 :
1365 583893 : return plan;
1366 : }
1367 :
1368 : /*
1369 : * set_indexonlyscan_references
1370 : * Do set_plan_references processing on an IndexOnlyScan
1371 : *
1372 : * This is unlike the handling of a plain IndexScan because we have to
1373 : * convert Vars referencing the heap into Vars referencing the index.
1374 : * We can use the fix_upper_expr machinery for that, by working from a
1375 : * targetlist describing the index columns.
1376 : */
1377 : static Plan *
1378 9260 : set_indexonlyscan_references(PlannerInfo *root,
1379 : IndexOnlyScan *plan,
1380 : int rtoffset)
1381 : {
1382 : indexed_tlist *index_itlist;
1383 : List *stripped_indextlist;
1384 : ListCell *lc;
1385 :
1386 : /*
1387 : * Vars in the plan node's targetlist, qual, and recheckqual must only
1388 : * reference columns that the index AM can actually return. To ensure
1389 : * this, remove non-returnable columns (which are marked as resjunk) from
1390 : * the indexed tlist. We can just drop them because the indexed_tlist
1391 : * machinery pays attention to TLE resnos, not physical list position.
1392 : */
1393 9260 : stripped_indextlist = NIL;
1394 21695 : foreach(lc, plan->indextlist)
1395 : {
1396 12435 : TargetEntry *indextle = (TargetEntry *) lfirst(lc);
1397 :
1398 12435 : if (!indextle->resjunk)
1399 12409 : stripped_indextlist = lappend(stripped_indextlist, indextle);
1400 : }
1401 :
1402 9260 : index_itlist = build_tlist_index(stripped_indextlist);
1403 :
1404 9260 : plan->scan.scanrelid += rtoffset;
1405 9260 : plan->scan.plan.targetlist = (List *)
1406 9260 : fix_upper_expr(root,
1407 9260 : (Node *) plan->scan.plan.targetlist,
1408 : index_itlist,
1409 : INDEX_VAR,
1410 : rtoffset,
1411 : NRM_EQUAL,
1412 : NUM_EXEC_TLIST((Plan *) plan));
1413 9260 : plan->scan.plan.qual = (List *)
1414 9260 : fix_upper_expr(root,
1415 9260 : (Node *) plan->scan.plan.qual,
1416 : index_itlist,
1417 : INDEX_VAR,
1418 : rtoffset,
1419 : NRM_EQUAL,
1420 9260 : NUM_EXEC_QUAL((Plan *) plan));
1421 9260 : plan->recheckqual = (List *)
1422 9260 : fix_upper_expr(root,
1423 9260 : (Node *) plan->recheckqual,
1424 : index_itlist,
1425 : INDEX_VAR,
1426 : rtoffset,
1427 : NRM_EQUAL,
1428 9260 : NUM_EXEC_QUAL((Plan *) plan));
1429 : /* indexqual is already transformed to reference index columns */
1430 9260 : plan->indexqual = fix_scan_list(root, plan->indexqual,
1431 : rtoffset, 1);
1432 : /* indexorderby is already transformed to reference index columns */
1433 9260 : plan->indexorderby = fix_scan_list(root, plan->indexorderby,
1434 : rtoffset, 1);
1435 : /* indextlist must NOT be transformed to reference index columns */
1436 9260 : plan->indextlist = fix_scan_list(root, plan->indextlist,
1437 : rtoffset, NUM_EXEC_TLIST((Plan *) plan));
1438 :
1439 9260 : pfree(index_itlist);
1440 :
1441 9260 : return (Plan *) plan;
1442 : }
1443 :
1444 : /*
1445 : * set_subqueryscan_references
1446 : * Do set_plan_references processing on a SubqueryScan
1447 : *
1448 : * We try to strip out the SubqueryScan entirely; if we can't, we have
1449 : * to do the normal processing on it.
1450 : */
1451 : static Plan *
1452 20064 : set_subqueryscan_references(PlannerInfo *root,
1453 : SubqueryScan *plan,
1454 : int rtoffset)
1455 : {
1456 : RelOptInfo *rel;
1457 : Plan *result;
1458 :
1459 : /* Need to look up the subquery's RelOptInfo, since we need its subroot */
1460 20064 : rel = find_base_rel(root, plan->scan.scanrelid);
1461 :
1462 : /* Recursively process the subplan */
1463 20064 : plan->subplan = set_plan_references(rel->subroot, plan->subplan);
1464 :
1465 20064 : if (trivial_subqueryscan(plan))
1466 : {
1467 : Index scanrelid;
1468 :
1469 : /*
1470 : * We can omit the SubqueryScan node and just pull up the subplan.
1471 : */
1472 9152 : result = clean_up_removed_plan_level((Plan *) plan, plan->subplan);
1473 :
1474 : /* Remember that we removed a SubqueryScan */
1475 9152 : scanrelid = plan->scan.scanrelid + rtoffset;
1476 9152 : record_elided_node(root->glob, plan->subplan->plan_node_id,
1477 : T_SubqueryScan, bms_make_singleton(scanrelid));
1478 : }
1479 : else
1480 : {
1481 : /*
1482 : * Keep the SubqueryScan node. We have to do the processing that
1483 : * set_plan_references would otherwise have done on it. Notice we do
1484 : * not do set_upper_references() here, because a SubqueryScan will
1485 : * always have been created with correct references to its subplan's
1486 : * outputs to begin with.
1487 : */
1488 10912 : plan->scan.scanrelid += rtoffset;
1489 10912 : plan->scan.plan.targetlist =
1490 10912 : fix_scan_list(root, plan->scan.plan.targetlist,
1491 : rtoffset, NUM_EXEC_TLIST((Plan *) plan));
1492 10912 : plan->scan.plan.qual =
1493 10912 : fix_scan_list(root, plan->scan.plan.qual,
1494 : rtoffset, NUM_EXEC_QUAL((Plan *) plan));
1495 :
1496 10912 : result = (Plan *) plan;
1497 : }
1498 :
1499 20064 : return result;
1500 : }
1501 :
1502 : /*
1503 : * trivial_subqueryscan
1504 : * Detect whether a SubqueryScan can be deleted from the plan tree.
1505 : *
1506 : * We can delete it if it has no qual to check and the targetlist just
1507 : * regurgitates the output of the child plan.
1508 : *
1509 : * This can be called from mark_async_capable_plan(), a helper function for
1510 : * create_append_plan(), before set_subqueryscan_references(), to determine
1511 : * triviality of a SubqueryScan that is a child of an Append node. So we
1512 : * cache the result in the SubqueryScan node to avoid repeated computation.
1513 : *
1514 : * Note: when called from mark_async_capable_plan(), we determine the result
1515 : * before running finalize_plan() on the SubqueryScan node (if needed) and
1516 : * set_plan_references() on the subplan tree, but this would be safe, because
1517 : * 1) finalize_plan() doesn't modify the tlist or quals for the SubqueryScan
1518 : * node (or that for any plan node in the subplan tree), and
1519 : * 2) set_plan_references() modifies the tlist for every plan node in the
1520 : * subplan tree, but keeps const/resjunk columns as const/resjunk ones and
1521 : * preserves the length and order of the tlist, and
1522 : * 3) set_plan_references() might delete the topmost plan node like an Append
1523 : * or MergeAppend from the subplan tree and pull up the child plan node,
1524 : * but in that case, the tlist for the child plan node exactly matches the
1525 : * parent.
1526 : */
1527 : bool
1528 25744 : trivial_subqueryscan(SubqueryScan *plan)
1529 : {
1530 : int attrno;
1531 : ListCell *lp,
1532 : *lc;
1533 :
1534 : /* We might have detected this already; in which case reuse the result */
1535 25744 : if (plan->scanstatus == SUBQUERY_SCAN_TRIVIAL)
1536 2310 : return true;
1537 23434 : if (plan->scanstatus == SUBQUERY_SCAN_NONTRIVIAL)
1538 3370 : return false;
1539 : Assert(plan->scanstatus == SUBQUERY_SCAN_UNKNOWN);
1540 : /* Initially, mark the SubqueryScan as non-deletable from the plan tree */
1541 20064 : plan->scanstatus = SUBQUERY_SCAN_NONTRIVIAL;
1542 :
1543 20064 : if (plan->scan.plan.qual != NIL)
1544 365 : return false;
1545 :
1546 39398 : if (list_length(plan->scan.plan.targetlist) !=
1547 19699 : list_length(plan->subplan->targetlist))
1548 6425 : return false; /* tlists not same length */
1549 :
1550 13274 : attrno = 1;
1551 41104 : forboth(lp, plan->scan.plan.targetlist, lc, plan->subplan->targetlist)
1552 : {
1553 31952 : TargetEntry *ptle = (TargetEntry *) lfirst(lp);
1554 31952 : TargetEntry *ctle = (TargetEntry *) lfirst(lc);
1555 :
1556 31952 : if (ptle->resjunk != ctle->resjunk)
1557 4122 : return false; /* tlist doesn't match junk status */
1558 :
1559 : /*
1560 : * We accept either a Var referencing the corresponding element of the
1561 : * subplan tlist, or a Const equaling the subplan element. See
1562 : * generate_setop_tlist() for motivation.
1563 : */
1564 31940 : if (ptle->expr && IsA(ptle->expr, Var))
1565 26624 : {
1566 26720 : Var *var = (Var *) ptle->expr;
1567 :
1568 : Assert(var->varno == plan->scan.scanrelid);
1569 : Assert(var->varlevelsup == 0);
1570 26720 : if (var->varattno != attrno)
1571 96 : return false; /* out of order */
1572 : }
1573 5220 : else if (ptle->expr && IsA(ptle->expr, Const))
1574 : {
1575 4492 : if (!equal(ptle->expr, ctle->expr))
1576 3286 : return false;
1577 : }
1578 : else
1579 728 : return false;
1580 :
1581 27830 : attrno++;
1582 : }
1583 :
1584 : /* Re-mark the SubqueryScan as deletable from the plan tree */
1585 9152 : plan->scanstatus = SUBQUERY_SCAN_TRIVIAL;
1586 :
1587 9152 : return true;
1588 : }
1589 :
1590 : /*
1591 : * clean_up_removed_plan_level
1592 : * Do necessary cleanup when we strip out a SubqueryScan, Append, etc
1593 : *
1594 : * We are dropping the "parent" plan in favor of returning just its "child".
1595 : * A few small tweaks are needed.
1596 : */
1597 : static Plan *
1598 12518 : clean_up_removed_plan_level(Plan *parent, Plan *child)
1599 : {
1600 : /*
1601 : * We have to be sure we don't lose any initplans, so move any that were
1602 : * attached to the parent plan to the child. If any are parallel-unsafe,
1603 : * the child is no longer parallel-safe. As a cosmetic matter, also add
1604 : * the initplans' run costs to the child's costs.
1605 : */
1606 12518 : if (parent->initPlan)
1607 : {
1608 : Cost initplan_cost;
1609 : bool unsafe_initplans;
1610 :
1611 21 : SS_compute_initplan_cost(parent->initPlan,
1612 : &initplan_cost, &unsafe_initplans);
1613 21 : child->startup_cost += initplan_cost;
1614 21 : child->total_cost += initplan_cost;
1615 21 : if (unsafe_initplans)
1616 9 : child->parallel_safe = false;
1617 :
1618 : /*
1619 : * Attach plans this way so that parent's initplans are processed
1620 : * before any pre-existing initplans of the child. Probably doesn't
1621 : * matter, but let's preserve the ordering just in case.
1622 : */
1623 21 : child->initPlan = list_concat(parent->initPlan,
1624 21 : child->initPlan);
1625 : }
1626 :
1627 : /*
1628 : * We also have to transfer the parent's column labeling info into the
1629 : * child, else columns sent to client will be improperly labeled if this
1630 : * is the topmost plan level. resjunk and so on may be important too.
1631 : */
1632 12518 : apply_tlist_labeling(child->targetlist, parent->targetlist);
1633 :
1634 12518 : return child;
1635 : }
1636 :
1637 : /*
1638 : * set_foreignscan_references
1639 : * Do set_plan_references processing on a ForeignScan
1640 : */
1641 : static void
1642 1024 : set_foreignscan_references(PlannerInfo *root,
1643 : ForeignScan *fscan,
1644 : int rtoffset)
1645 : {
1646 : /* Adjust scanrelid if it's valid */
1647 1024 : if (fscan->scan.scanrelid > 0)
1648 738 : fscan->scan.scanrelid += rtoffset;
1649 :
1650 1024 : if (fscan->fdw_scan_tlist != NIL || fscan->scan.scanrelid == 0)
1651 286 : {
1652 : /*
1653 : * Adjust tlist, qual, fdw_exprs, fdw_recheck_quals to reference
1654 : * foreign scan tuple
1655 : */
1656 286 : indexed_tlist *itlist = build_tlist_index(fscan->fdw_scan_tlist);
1657 :
1658 286 : fscan->scan.plan.targetlist = (List *)
1659 286 : fix_upper_expr(root,
1660 286 : (Node *) fscan->scan.plan.targetlist,
1661 : itlist,
1662 : INDEX_VAR,
1663 : rtoffset,
1664 : NRM_EQUAL,
1665 : NUM_EXEC_TLIST((Plan *) fscan));
1666 286 : fscan->scan.plan.qual = (List *)
1667 286 : fix_upper_expr(root,
1668 286 : (Node *) fscan->scan.plan.qual,
1669 : itlist,
1670 : INDEX_VAR,
1671 : rtoffset,
1672 : NRM_EQUAL,
1673 286 : NUM_EXEC_QUAL((Plan *) fscan));
1674 286 : fscan->fdw_exprs = (List *)
1675 286 : fix_upper_expr(root,
1676 286 : (Node *) fscan->fdw_exprs,
1677 : itlist,
1678 : INDEX_VAR,
1679 : rtoffset,
1680 : NRM_EQUAL,
1681 286 : NUM_EXEC_QUAL((Plan *) fscan));
1682 286 : fscan->fdw_recheck_quals = (List *)
1683 286 : fix_upper_expr(root,
1684 286 : (Node *) fscan->fdw_recheck_quals,
1685 : itlist,
1686 : INDEX_VAR,
1687 : rtoffset,
1688 : NRM_EQUAL,
1689 286 : NUM_EXEC_QUAL((Plan *) fscan));
1690 286 : pfree(itlist);
1691 : /* fdw_scan_tlist itself just needs fix_scan_list() adjustments */
1692 286 : fscan->fdw_scan_tlist =
1693 286 : fix_scan_list(root, fscan->fdw_scan_tlist,
1694 : rtoffset, NUM_EXEC_TLIST((Plan *) fscan));
1695 : }
1696 : else
1697 : {
1698 : /*
1699 : * Adjust tlist, qual, fdw_exprs, fdw_recheck_quals in the standard
1700 : * way
1701 : */
1702 738 : fscan->scan.plan.targetlist =
1703 738 : fix_scan_list(root, fscan->scan.plan.targetlist,
1704 : rtoffset, NUM_EXEC_TLIST((Plan *) fscan));
1705 738 : fscan->scan.plan.qual =
1706 738 : fix_scan_list(root, fscan->scan.plan.qual,
1707 : rtoffset, NUM_EXEC_QUAL((Plan *) fscan));
1708 738 : fscan->fdw_exprs =
1709 738 : fix_scan_list(root, fscan->fdw_exprs,
1710 : rtoffset, NUM_EXEC_QUAL((Plan *) fscan));
1711 738 : fscan->fdw_recheck_quals =
1712 738 : fix_scan_list(root, fscan->fdw_recheck_quals,
1713 : rtoffset, NUM_EXEC_QUAL((Plan *) fscan));
1714 : }
1715 :
1716 1024 : fscan->fs_relids = offset_relid_set(fscan->fs_relids, rtoffset);
1717 1024 : fscan->fs_base_relids = offset_relid_set(fscan->fs_base_relids, rtoffset);
1718 :
1719 : /* Adjust resultRelation if it's valid */
1720 1024 : if (fscan->resultRelation > 0)
1721 104 : fscan->resultRelation += rtoffset;
1722 1024 : }
1723 :
1724 : /*
1725 : * set_customscan_references
1726 : * Do set_plan_references processing on a CustomScan
1727 : */
1728 : static void
1729 0 : set_customscan_references(PlannerInfo *root,
1730 : CustomScan *cscan,
1731 : int rtoffset)
1732 : {
1733 : ListCell *lc;
1734 :
1735 : /* Adjust scanrelid if it's valid */
1736 0 : if (cscan->scan.scanrelid > 0)
1737 0 : cscan->scan.scanrelid += rtoffset;
1738 :
1739 0 : if (cscan->custom_scan_tlist != NIL || cscan->scan.scanrelid == 0)
1740 0 : {
1741 : /* Adjust tlist, qual, custom_exprs to reference custom scan tuple */
1742 0 : indexed_tlist *itlist = build_tlist_index(cscan->custom_scan_tlist);
1743 :
1744 0 : cscan->scan.plan.targetlist = (List *)
1745 0 : fix_upper_expr(root,
1746 0 : (Node *) cscan->scan.plan.targetlist,
1747 : itlist,
1748 : INDEX_VAR,
1749 : rtoffset,
1750 : NRM_EQUAL,
1751 : NUM_EXEC_TLIST((Plan *) cscan));
1752 0 : cscan->scan.plan.qual = (List *)
1753 0 : fix_upper_expr(root,
1754 0 : (Node *) cscan->scan.plan.qual,
1755 : itlist,
1756 : INDEX_VAR,
1757 : rtoffset,
1758 : NRM_EQUAL,
1759 0 : NUM_EXEC_QUAL((Plan *) cscan));
1760 0 : cscan->custom_exprs = (List *)
1761 0 : fix_upper_expr(root,
1762 0 : (Node *) cscan->custom_exprs,
1763 : itlist,
1764 : INDEX_VAR,
1765 : rtoffset,
1766 : NRM_EQUAL,
1767 0 : NUM_EXEC_QUAL((Plan *) cscan));
1768 0 : pfree(itlist);
1769 : /* custom_scan_tlist itself just needs fix_scan_list() adjustments */
1770 0 : cscan->custom_scan_tlist =
1771 0 : fix_scan_list(root, cscan->custom_scan_tlist,
1772 : rtoffset, NUM_EXEC_TLIST((Plan *) cscan));
1773 : }
1774 : else
1775 : {
1776 : /* Adjust tlist, qual, custom_exprs in the standard way */
1777 0 : cscan->scan.plan.targetlist =
1778 0 : fix_scan_list(root, cscan->scan.plan.targetlist,
1779 : rtoffset, NUM_EXEC_TLIST((Plan *) cscan));
1780 0 : cscan->scan.plan.qual =
1781 0 : fix_scan_list(root, cscan->scan.plan.qual,
1782 : rtoffset, NUM_EXEC_QUAL((Plan *) cscan));
1783 0 : cscan->custom_exprs =
1784 0 : fix_scan_list(root, cscan->custom_exprs,
1785 : rtoffset, NUM_EXEC_QUAL((Plan *) cscan));
1786 : }
1787 :
1788 : /* Adjust child plan-nodes recursively, if needed */
1789 0 : foreach(lc, cscan->custom_plans)
1790 : {
1791 0 : lfirst(lc) = set_plan_refs(root, (Plan *) lfirst(lc), rtoffset);
1792 : }
1793 :
1794 0 : cscan->custom_relids = offset_relid_set(cscan->custom_relids, rtoffset);
1795 0 : }
1796 :
1797 : /*
1798 : * register_partpruneinfo
1799 : * Subroutine for set_append_references and set_mergeappend_references
1800 : *
1801 : * Add the PartitionPruneInfo from root->partPruneInfos at the given index
1802 : * into PlannerGlobal->partPruneInfos and return its index there.
1803 : *
1804 : * Also update the RT indexes present in PartitionedRelPruneInfos to add the
1805 : * offset.
1806 : *
1807 : * Finally, if there are initial pruning steps, add the RT indexes of the
1808 : * leaf partitions to the set of relations that are prunable at execution
1809 : * startup time.
1810 : */
1811 : static int
1812 283 : register_partpruneinfo(PlannerInfo *root, int part_prune_index, int rtoffset)
1813 : {
1814 283 : PlannerGlobal *glob = root->glob;
1815 : PartitionPruneInfo *pinfo;
1816 : ListCell *l;
1817 :
1818 : Assert(part_prune_index >= 0 &&
1819 : part_prune_index < list_length(root->partPruneInfos));
1820 283 : pinfo = list_nth_node(PartitionPruneInfo, root->partPruneInfos,
1821 : part_prune_index);
1822 :
1823 283 : pinfo->relids = offset_relid_set(pinfo->relids, rtoffset);
1824 572 : foreach(l, pinfo->prune_infos)
1825 : {
1826 289 : List *prune_infos = lfirst(l);
1827 : ListCell *l2;
1828 :
1829 785 : foreach(l2, prune_infos)
1830 : {
1831 496 : PartitionedRelPruneInfo *prelinfo = lfirst(l2);
1832 : int i;
1833 :
1834 496 : prelinfo->rtindex += rtoffset;
1835 496 : prelinfo->initial_pruning_steps =
1836 496 : fix_scan_list(root, prelinfo->initial_pruning_steps,
1837 : rtoffset, 1);
1838 496 : prelinfo->exec_pruning_steps =
1839 496 : fix_scan_list(root, prelinfo->exec_pruning_steps,
1840 : rtoffset, 1);
1841 :
1842 1961 : for (i = 0; i < prelinfo->nparts; i++)
1843 : {
1844 : /*
1845 : * Non-leaf partitions and partitions that do not have a
1846 : * subplan are not included in this map as mentioned in
1847 : * make_partitionedrel_pruneinfo().
1848 : */
1849 1465 : if (prelinfo->leafpart_rti_map[i])
1850 : {
1851 1187 : prelinfo->leafpart_rti_map[i] += rtoffset;
1852 1187 : if (prelinfo->initial_pruning_steps)
1853 374 : glob->prunableRelids = bms_add_member(glob->prunableRelids,
1854 374 : prelinfo->leafpart_rti_map[i]);
1855 : }
1856 : }
1857 : }
1858 : }
1859 :
1860 283 : glob->partPruneInfos = lappend(glob->partPruneInfos, pinfo);
1861 :
1862 283 : return list_length(glob->partPruneInfos) - 1;
1863 : }
1864 :
1865 : /*
1866 : * set_append_references
1867 : * Do set_plan_references processing on an Append
1868 : *
1869 : * We try to strip out the Append entirely; if we can't, we have
1870 : * to do the normal processing on it.
1871 : */
1872 : static Plan *
1873 12451 : set_append_references(PlannerInfo *root,
1874 : Append *aplan,
1875 : int rtoffset)
1876 : {
1877 : ListCell *l;
1878 :
1879 : /*
1880 : * Append, like Sort et al, doesn't actually evaluate its targetlist or
1881 : * check quals. If it's got exactly one child plan, then it's not doing
1882 : * anything useful at all, and we can strip it out.
1883 : */
1884 : Assert(aplan->plan.qual == NIL);
1885 :
1886 : /* First, we gotta recurse on the children */
1887 43197 : foreach(l, aplan->appendplans)
1888 : {
1889 30746 : lfirst(l) = set_plan_refs(root, (Plan *) lfirst(l), rtoffset);
1890 : }
1891 :
1892 : /*
1893 : * See if it's safe to get rid of the Append entirely. For this to be
1894 : * safe, there must be only one child plan and that child plan's parallel
1895 : * awareness must match the Append's. The reason for the latter is that
1896 : * if the Append is parallel aware and the child is not, then the calling
1897 : * plan may execute the non-parallel aware child multiple times. (If you
1898 : * change these rules, update create_append_path to match.)
1899 : */
1900 12451 : if (list_length(aplan->appendplans) == 1)
1901 : {
1902 3364 : Plan *p = (Plan *) linitial(aplan->appendplans);
1903 :
1904 3364 : if (p->parallel_aware == aplan->plan.parallel_aware)
1905 : {
1906 : Plan *result;
1907 :
1908 3364 : result = clean_up_removed_plan_level((Plan *) aplan, p);
1909 :
1910 : /* Remember that we removed an Append */
1911 3364 : record_elided_node(root->glob, p->plan_node_id, T_Append,
1912 : offset_relid_set(aplan->apprelids, rtoffset));
1913 :
1914 3364 : return result;
1915 : }
1916 : }
1917 :
1918 : /*
1919 : * Otherwise, clean up the Append as needed. It's okay to do this after
1920 : * recursing to the children, because set_dummy_tlist_references doesn't
1921 : * look at those.
1922 : */
1923 9087 : set_dummy_tlist_references((Plan *) aplan, rtoffset);
1924 :
1925 9087 : aplan->apprelids = offset_relid_set(aplan->apprelids, rtoffset);
1926 :
1927 : /*
1928 : * Add PartitionPruneInfo, if any, to PlannerGlobal and update the index.
1929 : * Also update the RT indexes present in it to add the offset.
1930 : */
1931 9087 : if (aplan->part_prune_index >= 0)
1932 265 : aplan->part_prune_index =
1933 265 : register_partpruneinfo(root, aplan->part_prune_index, rtoffset);
1934 :
1935 : /* We don't need to recurse to lefttree or righttree ... */
1936 : Assert(aplan->plan.lefttree == NULL);
1937 : Assert(aplan->plan.righttree == NULL);
1938 :
1939 9087 : return (Plan *) aplan;
1940 : }
1941 :
1942 : /*
1943 : * set_mergeappend_references
1944 : * Do set_plan_references processing on a MergeAppend
1945 : *
1946 : * We try to strip out the MergeAppend entirely; if we can't, we have
1947 : * to do the normal processing on it.
1948 : */
1949 : static Plan *
1950 289 : set_mergeappend_references(PlannerInfo *root,
1951 : MergeAppend *mplan,
1952 : int rtoffset)
1953 : {
1954 : ListCell *l;
1955 :
1956 : /*
1957 : * MergeAppend, like Sort et al, doesn't actually evaluate its targetlist
1958 : * or check quals. If it's got exactly one child plan, then it's not
1959 : * doing anything useful at all, and we can strip it out.
1960 : */
1961 : Assert(mplan->plan.qual == NIL);
1962 :
1963 : /* First, we gotta recurse on the children */
1964 1100 : foreach(l, mplan->mergeplans)
1965 : {
1966 811 : lfirst(l) = set_plan_refs(root, (Plan *) lfirst(l), rtoffset);
1967 : }
1968 :
1969 : /*
1970 : * See if it's safe to get rid of the MergeAppend entirely. For this to
1971 : * be safe, there must be only one child plan and that child plan's
1972 : * parallel awareness must match the MergeAppend's. The reason for the
1973 : * latter is that if the MergeAppend is parallel aware and the child is
1974 : * not, then the calling plan may execute the non-parallel aware child
1975 : * multiple times. (If you change these rules, update
1976 : * create_merge_append_path to match.)
1977 : */
1978 289 : if (list_length(mplan->mergeplans) == 1)
1979 : {
1980 2 : Plan *p = (Plan *) linitial(mplan->mergeplans);
1981 :
1982 2 : if (p->parallel_aware == mplan->plan.parallel_aware)
1983 : {
1984 : Plan *result;
1985 :
1986 2 : result = clean_up_removed_plan_level((Plan *) mplan, p);
1987 :
1988 : /* Remember that we removed a MergeAppend */
1989 2 : record_elided_node(root->glob, p->plan_node_id, T_MergeAppend,
1990 : offset_relid_set(mplan->apprelids, rtoffset));
1991 :
1992 2 : return result;
1993 : }
1994 : }
1995 :
1996 : /*
1997 : * Otherwise, clean up the MergeAppend as needed. It's okay to do this
1998 : * after recursing to the children, because set_dummy_tlist_references
1999 : * doesn't look at those.
2000 : */
2001 287 : set_dummy_tlist_references((Plan *) mplan, rtoffset);
2002 :
2003 287 : mplan->apprelids = offset_relid_set(mplan->apprelids, rtoffset);
2004 :
2005 : /*
2006 : * Add PartitionPruneInfo, if any, to PlannerGlobal and update the index.
2007 : * Also update the RT indexes present in it to add the offset.
2008 : */
2009 287 : if (mplan->part_prune_index >= 0)
2010 18 : mplan->part_prune_index =
2011 18 : register_partpruneinfo(root, mplan->part_prune_index, rtoffset);
2012 :
2013 : /* We don't need to recurse to lefttree or righttree ... */
2014 : Assert(mplan->plan.lefttree == NULL);
2015 : Assert(mplan->plan.righttree == NULL);
2016 :
2017 287 : return (Plan *) mplan;
2018 : }
2019 :
2020 : /*
2021 : * set_hash_references
2022 : * Do set_plan_references processing on a Hash node
2023 : */
2024 : static void
2025 17804 : set_hash_references(PlannerInfo *root, Plan *plan, int rtoffset)
2026 : {
2027 17804 : Hash *hplan = (Hash *) plan;
2028 17804 : Plan *outer_plan = plan->lefttree;
2029 : indexed_tlist *outer_itlist;
2030 :
2031 : /*
2032 : * Hash's hashkeys are used when feeding tuples into the hashtable,
2033 : * therefore have them reference Hash's outer plan (which itself is the
2034 : * inner plan of the HashJoin).
2035 : */
2036 17804 : outer_itlist = build_tlist_index(outer_plan->targetlist);
2037 17804 : hplan->hashkeys = (List *)
2038 17804 : fix_upper_expr(root,
2039 17804 : (Node *) hplan->hashkeys,
2040 : outer_itlist,
2041 : OUTER_VAR,
2042 : rtoffset,
2043 : NRM_EQUAL,
2044 17804 : NUM_EXEC_QUAL(plan));
2045 :
2046 : /* Hash doesn't project */
2047 17804 : set_dummy_tlist_references(plan, rtoffset);
2048 :
2049 : /* Hash nodes don't have their own quals */
2050 : Assert(plan->qual == NIL);
2051 17804 : }
2052 :
2053 : /*
2054 : * offset_relid_set
2055 : * Apply rtoffset to the members of a Relids set.
2056 : */
2057 : static Relids
2058 123554 : offset_relid_set(Relids relids, int rtoffset)
2059 : {
2060 123554 : Relids result = NULL;
2061 : int rtindex;
2062 :
2063 : /* If there's no offset to apply, we needn't recompute the value */
2064 123554 : if (rtoffset == 0)
2065 113103 : return relids;
2066 10451 : rtindex = -1;
2067 15909 : while ((rtindex = bms_next_member(relids, rtindex)) >= 0)
2068 5458 : result = bms_add_member(result, rtindex + rtoffset);
2069 10451 : return result;
2070 : }
2071 :
2072 : /*
2073 : * copyVar
2074 : * Copy a Var node.
2075 : *
2076 : * fix_scan_expr and friends do this enough times that it's worth having
2077 : * a bespoke routine instead of using the generic copyObject() function.
2078 : */
2079 : static inline Var *
2080 1095107 : copyVar(Var *var)
2081 : {
2082 1095107 : Var *newvar = palloc_object(Var);
2083 :
2084 1095107 : *newvar = *var;
2085 1095107 : return newvar;
2086 : }
2087 :
2088 : /*
2089 : * fix_expr_common
2090 : * Do generic set_plan_references processing on an expression node
2091 : *
2092 : * This is code that is common to all variants of expression-fixing.
2093 : * We must look up operator opcode info for OpExpr and related nodes,
2094 : * add OIDs from regclass Const nodes into root->glob->relationOids, and
2095 : * add PlanInvalItems for user-defined functions into root->glob->invalItems.
2096 : * We also fill in column index lists for GROUPING() expressions.
2097 : *
2098 : * We assume it's okay to update opcode info in-place. So this could possibly
2099 : * scribble on the planner's input data structures, but it's OK.
2100 : */
2101 : static void
2102 7360081 : fix_expr_common(PlannerInfo *root, Node *node)
2103 : {
2104 : /* We assume callers won't call us on a NULL pointer */
2105 7360081 : if (IsA(node, Aggref))
2106 : {
2107 31792 : record_plan_function_dependency(root,
2108 : ((Aggref *) node)->aggfnoid);
2109 : }
2110 7328289 : else if (IsA(node, WindowFunc))
2111 : {
2112 1998 : record_plan_function_dependency(root,
2113 : ((WindowFunc *) node)->winfnoid);
2114 : }
2115 7326291 : else if (IsA(node, FuncExpr))
2116 : {
2117 155642 : record_plan_function_dependency(root,
2118 : ((FuncExpr *) node)->funcid);
2119 : }
2120 7170649 : else if (IsA(node, OpExpr))
2121 : {
2122 445645 : set_opfuncid((OpExpr *) node);
2123 445645 : record_plan_function_dependency(root,
2124 : ((OpExpr *) node)->opfuncid);
2125 : }
2126 6725004 : else if (IsA(node, DistinctExpr))
2127 : {
2128 552 : set_opfuncid((OpExpr *) node); /* rely on struct equivalence */
2129 552 : record_plan_function_dependency(root,
2130 : ((DistinctExpr *) node)->opfuncid);
2131 : }
2132 6724452 : else if (IsA(node, NullIfExpr))
2133 : {
2134 65 : set_opfuncid((OpExpr *) node); /* rely on struct equivalence */
2135 65 : record_plan_function_dependency(root,
2136 : ((NullIfExpr *) node)->opfuncid);
2137 : }
2138 6724387 : else if (IsA(node, ScalarArrayOpExpr))
2139 : {
2140 19634 : ScalarArrayOpExpr *saop = (ScalarArrayOpExpr *) node;
2141 :
2142 19634 : set_sa_opfuncid(saop);
2143 19634 : record_plan_function_dependency(root, saop->opfuncid);
2144 :
2145 19634 : if (OidIsValid(saop->hashfuncid))
2146 325 : record_plan_function_dependency(root, saop->hashfuncid);
2147 :
2148 19634 : if (OidIsValid(saop->negfuncid))
2149 35 : record_plan_function_dependency(root, saop->negfuncid);
2150 : }
2151 6704753 : else if (IsA(node, Const))
2152 : {
2153 734401 : Const *con = (Const *) node;
2154 :
2155 : /* Check for regclass reference */
2156 734401 : if (ISREGCLASSCONST(con))
2157 133716 : root->glob->relationOids =
2158 133716 : lappend_oid(root->glob->relationOids,
2159 : DatumGetObjectId(con->constvalue));
2160 : }
2161 5970352 : else if (IsA(node, GroupingFunc))
2162 : {
2163 179 : GroupingFunc *g = (GroupingFunc *) node;
2164 179 : AttrNumber *grouping_map = root->grouping_map;
2165 :
2166 : /* If there are no grouping sets, we don't need this. */
2167 :
2168 : Assert(grouping_map || g->cols == NIL);
2169 :
2170 179 : if (grouping_map)
2171 : {
2172 : ListCell *lc;
2173 130 : List *cols = NIL;
2174 :
2175 342 : foreach(lc, g->refs)
2176 : {
2177 212 : cols = lappend_int(cols, grouping_map[lfirst_int(lc)]);
2178 : }
2179 :
2180 : Assert(!g->cols || equal(cols, g->cols));
2181 :
2182 130 : if (!g->cols)
2183 130 : g->cols = cols;
2184 : }
2185 : }
2186 7360081 : }
2187 :
2188 : /*
2189 : * fix_param_node
2190 : * Do set_plan_references processing on a Param
2191 : *
2192 : * If it's a PARAM_MULTIEXPR, replace it with the appropriate Param from
2193 : * root->multiexpr_params; otherwise no change is needed.
2194 : * Just for paranoia's sake, we make a copy of the node in either case.
2195 : */
2196 : static Node *
2197 55752 : fix_param_node(PlannerInfo *root, Param *p)
2198 : {
2199 55752 : if (p->paramkind == PARAM_MULTIEXPR)
2200 : {
2201 143 : int subqueryid = p->paramid >> 16;
2202 143 : int colno = p->paramid & 0xFFFF;
2203 : List *params;
2204 :
2205 286 : if (subqueryid <= 0 ||
2206 143 : subqueryid > list_length(root->multiexpr_params))
2207 0 : elog(ERROR, "unexpected PARAM_MULTIEXPR ID: %d", p->paramid);
2208 143 : params = (List *) list_nth(root->multiexpr_params, subqueryid - 1);
2209 143 : if (colno <= 0 || colno > list_length(params))
2210 0 : elog(ERROR, "unexpected PARAM_MULTIEXPR ID: %d", p->paramid);
2211 143 : return copyObject(list_nth(params, colno - 1));
2212 : }
2213 55609 : return (Node *) copyObject(p);
2214 : }
2215 :
2216 : /*
2217 : * fix_alternative_subplan
2218 : * Do set_plan_references processing on an AlternativeSubPlan
2219 : *
2220 : * Choose one of the alternative implementations and return just that one,
2221 : * discarding the rest of the AlternativeSubPlan structure.
2222 : * Note: caller must still recurse into the result!
2223 : *
2224 : * We don't make any attempt to fix up cost estimates in the parent plan
2225 : * node or higher-level nodes.
2226 : */
2227 : static Node *
2228 918 : fix_alternative_subplan(PlannerInfo *root, AlternativeSubPlan *asplan,
2229 : double num_exec)
2230 : {
2231 918 : SubPlan *bestplan = NULL;
2232 918 : Cost bestcost = 0;
2233 : ListCell *lc;
2234 :
2235 : /*
2236 : * Compute the estimated cost of each subplan assuming num_exec
2237 : * executions, and keep the cheapest one. In event of exact equality of
2238 : * estimates, we prefer the later plan; this is a bit arbitrary, but in
2239 : * current usage it biases us to break ties against fast-start subplans.
2240 : */
2241 : Assert(asplan->subplans != NIL);
2242 :
2243 2754 : foreach(lc, asplan->subplans)
2244 : {
2245 1836 : SubPlan *curplan = (SubPlan *) lfirst(lc);
2246 : Cost curcost;
2247 :
2248 1836 : curcost = curplan->startup_cost + num_exec * curplan->per_call_cost;
2249 1836 : if (bestplan == NULL || curcost <= bestcost)
2250 : {
2251 1293 : bestplan = curplan;
2252 1293 : bestcost = curcost;
2253 : }
2254 :
2255 : /* Also mark all subplans that are in AlternativeSubPlans */
2256 1836 : root->isAltSubplan[curplan->plan_id - 1] = true;
2257 : }
2258 :
2259 : /* Mark the subplan we selected */
2260 918 : root->isUsedSubplan[bestplan->plan_id - 1] = true;
2261 :
2262 918 : return (Node *) bestplan;
2263 : }
2264 :
2265 : /*
2266 : * fix_scan_expr
2267 : * Do set_plan_references processing on a scan-level expression
2268 : *
2269 : * This consists of incrementing all Vars' varnos by rtoffset,
2270 : * replacing PARAM_MULTIEXPR Params, expanding PlaceHolderVars,
2271 : * replacing Aggref nodes that should be replaced by initplan output Params,
2272 : * choosing the best implementation for AlternativeSubPlans,
2273 : * looking up operator opcode info for OpExpr and related nodes,
2274 : * and adding OIDs from regclass Const nodes into root->glob->relationOids.
2275 : *
2276 : * 'node': the expression to be modified
2277 : * 'rtoffset': how much to increment varnos by
2278 : * 'num_exec': estimated number of executions of expression
2279 : *
2280 : * The expression tree is either copied-and-modified, or modified in-place
2281 : * if that seems safe.
2282 : */
2283 : static Node *
2284 1256034 : fix_scan_expr(PlannerInfo *root, Node *node, int rtoffset, double num_exec)
2285 : {
2286 : fix_scan_expr_context context;
2287 :
2288 1256034 : context.root = root;
2289 1256034 : context.rtoffset = rtoffset;
2290 1256034 : context.num_exec = num_exec;
2291 :
2292 1256034 : if (rtoffset != 0 ||
2293 1036038 : root->multiexpr_params != NIL ||
2294 1035747 : root->glob->lastPHId != 0 ||
2295 1030173 : root->minmax_aggs != NIL ||
2296 1029768 : root->hasAlternativeSubPlans)
2297 : {
2298 232972 : return fix_scan_expr_mutator(node, &context);
2299 : }
2300 : else
2301 : {
2302 : /*
2303 : * If rtoffset == 0, we don't need to change any Vars, and if there
2304 : * are no MULTIEXPR subqueries then we don't need to replace
2305 : * PARAM_MULTIEXPR Params, and if there are no placeholders anywhere
2306 : * we won't need to remove them, and if there are no minmax Aggrefs we
2307 : * won't need to replace them, and if there are no AlternativeSubPlans
2308 : * we won't need to remove them. Then it's OK to just scribble on the
2309 : * input node tree instead of copying (since the only change, filling
2310 : * in any unset opfuncid fields, is harmless). This saves just enough
2311 : * cycles to be noticeable on trivial queries.
2312 : */
2313 1023062 : (void) fix_scan_expr_walker(node, &context);
2314 1023062 : return node;
2315 : }
2316 : }
2317 :
2318 : static Node *
2319 1450083 : fix_scan_expr_mutator(Node *node, fix_scan_expr_context *context)
2320 : {
2321 1450083 : if (node == NULL)
2322 88823 : return NULL;
2323 1361260 : if (IsA(node, Var))
2324 : {
2325 468632 : Var *var = copyVar((Var *) node);
2326 :
2327 : Assert(var->varlevelsup == 0);
2328 :
2329 : /*
2330 : * We should not see Vars marked INNER_VAR, OUTER_VAR, or ROWID_VAR.
2331 : * But an indexqual expression could contain INDEX_VAR Vars.
2332 : */
2333 : Assert(var->varno != INNER_VAR);
2334 : Assert(var->varno != OUTER_VAR);
2335 : Assert(var->varno != ROWID_VAR);
2336 468632 : if (!IS_SPECIAL_VARNO(var->varno))
2337 441239 : var->varno += context->rtoffset;
2338 468632 : if (var->varnosyn > 0)
2339 468158 : var->varnosyn += context->rtoffset;
2340 468632 : return (Node *) var;
2341 : }
2342 892628 : if (IsA(node, Param))
2343 47916 : return fix_param_node(context->root, (Param *) node);
2344 844712 : if (IsA(node, Aggref))
2345 : {
2346 227 : Aggref *aggref = (Aggref *) node;
2347 : Param *aggparam;
2348 :
2349 : /* See if the Aggref should be replaced by a Param */
2350 227 : aggparam = find_minmax_agg_replacement_param(context->root, aggref);
2351 227 : if (aggparam != NULL)
2352 : {
2353 : /* Make a copy of the Param for paranoia's sake */
2354 212 : return (Node *) copyObject(aggparam);
2355 : }
2356 : /* If no match, just fall through to process it normally */
2357 : }
2358 844500 : if (IsA(node, CurrentOfExpr))
2359 : {
2360 0 : CurrentOfExpr *cexpr = (CurrentOfExpr *) copyObject(node);
2361 :
2362 : Assert(!IS_SPECIAL_VARNO(cexpr->cvarno));
2363 0 : cexpr->cvarno += context->rtoffset;
2364 0 : return (Node *) cexpr;
2365 : }
2366 844500 : if (IsA(node, PlaceHolderVar))
2367 : {
2368 : /* At scan level, we should always just evaluate the contained expr */
2369 1337 : PlaceHolderVar *phv = (PlaceHolderVar *) node;
2370 :
2371 : /* XXX can we assert something about phnullingrels? */
2372 1337 : return fix_scan_expr_mutator((Node *) phv->phexpr, context);
2373 : }
2374 843163 : if (IsA(node, AlternativeSubPlan))
2375 147 : return fix_scan_expr_mutator(fix_alternative_subplan(context->root,
2376 : (AlternativeSubPlan *) node,
2377 : context->num_exec),
2378 : context);
2379 843016 : fix_expr_common(context->root, node);
2380 843016 : return expression_tree_mutator(node, fix_scan_expr_mutator, context);
2381 : }
2382 :
2383 : static bool
2384 5492560 : fix_scan_expr_walker(Node *node, fix_scan_expr_context *context)
2385 : {
2386 5492560 : if (node == NULL)
2387 521622 : return false;
2388 : Assert(!(IsA(node, Var) && ((Var *) node)->varno == ROWID_VAR));
2389 : Assert(!IsA(node, PlaceHolderVar));
2390 : Assert(!IsA(node, AlternativeSubPlan));
2391 4970938 : fix_expr_common(context->root, node);
2392 4970938 : return expression_tree_walker(node, fix_scan_expr_walker, context);
2393 : }
2394 :
2395 : /*
2396 : * set_join_references
2397 : * Modify the target list and quals of a join node to reference its
2398 : * subplans, by setting the varnos to OUTER_VAR or INNER_VAR and setting
2399 : * attno values to the result domain number of either the corresponding
2400 : * outer or inner join tuple item. Also perform opcode lookup for these
2401 : * expressions, and add regclass OIDs to root->glob->relationOids.
2402 : */
2403 : static void
2404 72378 : set_join_references(PlannerInfo *root, Join *join, int rtoffset)
2405 : {
2406 72378 : Plan *outer_plan = join->plan.lefttree;
2407 72378 : Plan *inner_plan = join->plan.righttree;
2408 : indexed_tlist *outer_itlist;
2409 : indexed_tlist *inner_itlist;
2410 :
2411 72378 : outer_itlist = build_tlist_index(outer_plan->targetlist);
2412 72378 : inner_itlist = build_tlist_index(inner_plan->targetlist);
2413 :
2414 : /*
2415 : * First process the joinquals (including merge or hash clauses). These
2416 : * are logically below the join so they can always use all values
2417 : * available from the input tlists. It's okay to also handle
2418 : * NestLoopParams now, because those couldn't refer to nullable
2419 : * subexpressions.
2420 : */
2421 144756 : join->joinqual = fix_join_expr(root,
2422 : join->joinqual,
2423 : outer_itlist,
2424 : inner_itlist,
2425 : (Index) 0,
2426 : rtoffset,
2427 : NRM_EQUAL,
2428 72378 : NUM_EXEC_QUAL((Plan *) join));
2429 :
2430 : /* Now do join-type-specific stuff */
2431 72378 : if (IsA(join, NestLoop))
2432 : {
2433 50718 : NestLoop *nl = (NestLoop *) join;
2434 : ListCell *lc;
2435 :
2436 79673 : foreach(lc, nl->nestParams)
2437 : {
2438 28955 : NestLoopParam *nlp = (NestLoopParam *) lfirst(lc);
2439 :
2440 : /*
2441 : * Because we don't reparameterize parameterized paths to match
2442 : * the outer-join level at which they are used, Vars seen in the
2443 : * NestLoopParam expression may have nullingrels that are just a
2444 : * subset of those in the Vars actually available from the outer
2445 : * side. (Lateral references can also cause this, as explained in
2446 : * the comments for identify_current_nestloop_params.) Not
2447 : * checking this exactly is a bit grotty, but the work needed to
2448 : * make things match up perfectly seems well out of proportion to
2449 : * the value.
2450 : */
2451 57910 : nlp->paramval = (Var *) fix_upper_expr(root,
2452 28955 : (Node *) nlp->paramval,
2453 : outer_itlist,
2454 : OUTER_VAR,
2455 : rtoffset,
2456 : NRM_SUBSET,
2457 : NUM_EXEC_TLIST(outer_plan));
2458 : /* Check we replaced any PlaceHolderVar with simple Var */
2459 28955 : if (!(IsA(nlp->paramval, Var) &&
2460 28955 : nlp->paramval->varno == OUTER_VAR))
2461 0 : elog(ERROR, "NestLoopParam was not reduced to a simple Var");
2462 : }
2463 : }
2464 21660 : else if (IsA(join, MergeJoin))
2465 : {
2466 3856 : MergeJoin *mj = (MergeJoin *) join;
2467 :
2468 3856 : mj->mergeclauses = fix_join_expr(root,
2469 : mj->mergeclauses,
2470 : outer_itlist,
2471 : inner_itlist,
2472 : (Index) 0,
2473 : rtoffset,
2474 : NRM_EQUAL,
2475 3856 : NUM_EXEC_QUAL((Plan *) join));
2476 : }
2477 17804 : else if (IsA(join, HashJoin))
2478 : {
2479 17804 : HashJoin *hj = (HashJoin *) join;
2480 :
2481 35608 : hj->hashclauses = fix_join_expr(root,
2482 : hj->hashclauses,
2483 : outer_itlist,
2484 : inner_itlist,
2485 : (Index) 0,
2486 : rtoffset,
2487 : NRM_EQUAL,
2488 17804 : NUM_EXEC_QUAL((Plan *) join));
2489 :
2490 : /*
2491 : * HashJoin's hashkeys are used to look for matching tuples from its
2492 : * outer plan (not the Hash node!) in the hashtable.
2493 : */
2494 17804 : hj->hashkeys = (List *) fix_upper_expr(root,
2495 17804 : (Node *) hj->hashkeys,
2496 : outer_itlist,
2497 : OUTER_VAR,
2498 : rtoffset,
2499 : NRM_EQUAL,
2500 17804 : NUM_EXEC_QUAL((Plan *) join));
2501 : }
2502 :
2503 : /*
2504 : * Now we need to fix up the targetlist and qpqual, which are logically
2505 : * above the join. This means that, if it's not an inner join, any Vars
2506 : * and PHVs appearing here should have nullingrels that include the
2507 : * effects of the outer join, ie they will have nullingrels equal to the
2508 : * input Vars' nullingrels plus the bit added by the outer join. We don't
2509 : * currently have enough info available here to identify what that should
2510 : * be, so we just tell fix_join_expr to accept superset nullingrels
2511 : * matches instead of exact ones.
2512 : */
2513 72378 : join->plan.targetlist = fix_join_expr(root,
2514 : join->plan.targetlist,
2515 : outer_itlist,
2516 : inner_itlist,
2517 : (Index) 0,
2518 : rtoffset,
2519 72378 : (join->jointype == JOIN_INNER ? NRM_EQUAL : NRM_SUPERSET),
2520 : NUM_EXEC_TLIST((Plan *) join));
2521 72378 : join->plan.qual = fix_join_expr(root,
2522 : join->plan.qual,
2523 : outer_itlist,
2524 : inner_itlist,
2525 : (Index) 0,
2526 : rtoffset,
2527 72378 : (join->jointype == JOIN_INNER ? NRM_EQUAL : NRM_SUPERSET),
2528 72378 : NUM_EXEC_QUAL((Plan *) join));
2529 :
2530 72378 : pfree(outer_itlist);
2531 72378 : pfree(inner_itlist);
2532 72378 : }
2533 :
2534 : /*
2535 : * set_upper_references
2536 : * Update the targetlist and quals of an upper-level plan node
2537 : * to refer to the tuples returned by its lefttree subplan.
2538 : * Also perform opcode lookup for these expressions, and
2539 : * add regclass OIDs to root->glob->relationOids.
2540 : *
2541 : * This is used for single-input plan types like Agg, Group, Result.
2542 : *
2543 : * In most cases, we have to match up individual Vars in the tlist and
2544 : * qual expressions with elements of the subplan's tlist (which was
2545 : * generated by flattening these selfsame expressions, so it should have all
2546 : * the required variables). There is an important exception, however:
2547 : * depending on where we are in the plan tree, sort/group columns may have
2548 : * been pushed into the subplan tlist unflattened. If these values are also
2549 : * needed in the output then we want to reference the subplan tlist element
2550 : * rather than recomputing the expression.
2551 : */
2552 : static void
2553 39195 : set_upper_references(PlannerInfo *root, Plan *plan, int rtoffset)
2554 : {
2555 39195 : Plan *subplan = plan->lefttree;
2556 : indexed_tlist *subplan_itlist;
2557 : List *output_targetlist;
2558 : ListCell *l;
2559 :
2560 39195 : subplan_itlist = build_tlist_index(subplan->targetlist);
2561 :
2562 : /*
2563 : * If it's a grouping node with grouping sets, any Vars and PHVs appearing
2564 : * in the targetlist and quals should have nullingrels that include the
2565 : * effects of the grouping step, ie they will have nullingrels equal to
2566 : * the input Vars/PHVs' nullingrels plus the RT index of the grouping
2567 : * step. In order to perform exact nullingrels matches, we remove the RT
2568 : * index of the grouping step first.
2569 : */
2570 39195 : if (IsA(plan, Agg) &&
2571 24812 : root->group_rtindex > 0 &&
2572 3436 : ((Agg *) plan)->groupingSets)
2573 : {
2574 465 : plan->targetlist = (List *)
2575 465 : remove_nulling_relids((Node *) plan->targetlist,
2576 465 : bms_make_singleton(root->group_rtindex),
2577 : NULL);
2578 465 : plan->qual = (List *)
2579 465 : remove_nulling_relids((Node *) plan->qual,
2580 465 : bms_make_singleton(root->group_rtindex),
2581 : NULL);
2582 : }
2583 :
2584 39195 : output_targetlist = NIL;
2585 105592 : foreach(l, plan->targetlist)
2586 : {
2587 66397 : TargetEntry *tle = (TargetEntry *) lfirst(l);
2588 : Node *newexpr;
2589 :
2590 : /* If it's a sort/group item, first try to match by sortref */
2591 66397 : if (tle->ressortgroupref != 0)
2592 : {
2593 : newexpr = (Node *)
2594 20087 : search_indexed_tlist_for_sortgroupref(tle->expr,
2595 : tle->ressortgroupref,
2596 : subplan_itlist,
2597 : OUTER_VAR);
2598 20087 : if (!newexpr)
2599 11169 : newexpr = fix_upper_expr(root,
2600 11169 : (Node *) tle->expr,
2601 : subplan_itlist,
2602 : OUTER_VAR,
2603 : rtoffset,
2604 : NRM_EQUAL,
2605 : NUM_EXEC_TLIST(plan));
2606 : }
2607 : else
2608 46310 : newexpr = fix_upper_expr(root,
2609 46310 : (Node *) tle->expr,
2610 : subplan_itlist,
2611 : OUTER_VAR,
2612 : rtoffset,
2613 : NRM_EQUAL,
2614 : NUM_EXEC_TLIST(plan));
2615 66397 : tle = flatCopyTargetEntry(tle);
2616 66397 : tle->expr = (Expr *) newexpr;
2617 66397 : output_targetlist = lappend(output_targetlist, tle);
2618 : }
2619 39195 : plan->targetlist = output_targetlist;
2620 :
2621 39195 : plan->qual = (List *)
2622 39195 : fix_upper_expr(root,
2623 39195 : (Node *) plan->qual,
2624 : subplan_itlist,
2625 : OUTER_VAR,
2626 : rtoffset,
2627 : NRM_EQUAL,
2628 39195 : NUM_EXEC_QUAL(plan));
2629 :
2630 39195 : pfree(subplan_itlist);
2631 39195 : }
2632 :
2633 : /*
2634 : * set_param_references
2635 : * Initialize the initParam list in Gather or Gather merge node such that
2636 : * it contains reference of all the params that needs to be evaluated
2637 : * before execution of the node. It contains the initplan params that are
2638 : * being passed to the plan nodes below it.
2639 : */
2640 : static void
2641 753 : set_param_references(PlannerInfo *root, Plan *plan)
2642 : {
2643 : Assert(IsA(plan, Gather) || IsA(plan, GatherMerge));
2644 :
2645 753 : if (plan->lefttree->extParam)
2646 : {
2647 : PlannerInfo *proot;
2648 689 : Bitmapset *initSetParam = NULL;
2649 : ListCell *l;
2650 :
2651 1468 : for (proot = root; proot != NULL; proot = proot->parent_root)
2652 : {
2653 818 : foreach(l, proot->init_plans)
2654 : {
2655 39 : SubPlan *initsubplan = (SubPlan *) lfirst(l);
2656 : ListCell *l2;
2657 :
2658 78 : foreach(l2, initsubplan->setParam)
2659 : {
2660 39 : initSetParam = bms_add_member(initSetParam, lfirst_int(l2));
2661 : }
2662 : }
2663 : }
2664 :
2665 : /*
2666 : * Remember the list of all external initplan params that are used by
2667 : * the children of Gather or Gather merge node.
2668 : */
2669 689 : if (IsA(plan, Gather))
2670 509 : ((Gather *) plan)->initParam =
2671 509 : bms_intersect(plan->lefttree->extParam, initSetParam);
2672 : else
2673 180 : ((GatherMerge *) plan)->initParam =
2674 180 : bms_intersect(plan->lefttree->extParam, initSetParam);
2675 : }
2676 753 : }
2677 :
2678 : /*
2679 : * Recursively scan an expression tree and convert Aggrefs to the proper
2680 : * intermediate form for combining aggregates. This means (1) replacing each
2681 : * one's argument list with a single argument that is the original Aggref
2682 : * modified to show partial aggregation and (2) changing the upper Aggref to
2683 : * show combining aggregation.
2684 : *
2685 : * After this step, set_upper_references will replace the partial Aggrefs
2686 : * with Vars referencing the lower Agg plan node's outputs, so that the final
2687 : * form seen by the executor is a combining Aggref with a Var as input.
2688 : *
2689 : * It's rather messy to postpone this step until setrefs.c; ideally it'd be
2690 : * done in createplan.c. The difficulty is that once we modify the Aggref
2691 : * expressions, they will no longer be equal() to their original form and
2692 : * so cross-plan-node-level matches will fail. So this has to happen after
2693 : * the plan node above the Agg has resolved its subplan references.
2694 : */
2695 : static Node *
2696 5103 : convert_combining_aggrefs(Node *node, void *context)
2697 : {
2698 5103 : if (node == NULL)
2699 609 : return NULL;
2700 4494 : if (IsA(node, Aggref))
2701 : {
2702 1153 : Aggref *orig_agg = (Aggref *) node;
2703 : Aggref *child_agg;
2704 : Aggref *parent_agg;
2705 :
2706 : /* Assert we've not chosen to partial-ize any unsupported cases */
2707 : Assert(orig_agg->aggorder == NIL);
2708 : Assert(orig_agg->aggdistinct == NIL);
2709 :
2710 : /*
2711 : * Since aggregate calls can't be nested, we needn't recurse into the
2712 : * arguments. But for safety, flat-copy the Aggref node itself rather
2713 : * than modifying it in-place.
2714 : */
2715 1153 : child_agg = makeNode(Aggref);
2716 1153 : memcpy(child_agg, orig_agg, sizeof(Aggref));
2717 :
2718 : /*
2719 : * For the parent Aggref, we want to copy all the fields of the
2720 : * original aggregate *except* the args list, which we'll replace
2721 : * below, and the aggfilter expression, which should be applied only
2722 : * by the child not the parent. Rather than explicitly knowing about
2723 : * all the other fields here, we can momentarily modify child_agg to
2724 : * provide a suitable source for copyObject.
2725 : */
2726 1153 : child_agg->args = NIL;
2727 1153 : child_agg->aggfilter = NULL;
2728 1153 : parent_agg = copyObject(child_agg);
2729 1153 : child_agg->args = orig_agg->args;
2730 1153 : child_agg->aggfilter = orig_agg->aggfilter;
2731 :
2732 : /*
2733 : * Now, set up child_agg to represent the first phase of partial
2734 : * aggregation. For now, assume serialization is required.
2735 : */
2736 1153 : mark_partial_aggref(child_agg, AGGSPLIT_INITIAL_SERIAL);
2737 :
2738 : /*
2739 : * And set up parent_agg to represent the second phase.
2740 : */
2741 1153 : parent_agg->args = list_make1(makeTargetEntry((Expr *) child_agg,
2742 : 1, NULL, false));
2743 1153 : mark_partial_aggref(parent_agg, AGGSPLIT_FINAL_DESERIAL);
2744 :
2745 1153 : return (Node *) parent_agg;
2746 : }
2747 3341 : return expression_tree_mutator(node, convert_combining_aggrefs, context);
2748 : }
2749 :
2750 : /*
2751 : * set_dummy_tlist_references
2752 : * Replace the targetlist of an upper-level plan node with a simple
2753 : * list of OUTER_VAR references to its child.
2754 : *
2755 : * This is used for plan types like Sort and Append that don't evaluate
2756 : * their targetlists. Although the executor doesn't care at all what's in
2757 : * the tlist, EXPLAIN needs it to be realistic.
2758 : *
2759 : * Note: we could almost use set_upper_references() here, but it fails for
2760 : * Append for lack of a lefttree subplan. Single-purpose code is faster
2761 : * anyway.
2762 : */
2763 : static void
2764 84525 : set_dummy_tlist_references(Plan *plan, int rtoffset)
2765 : {
2766 : List *output_targetlist;
2767 : ListCell *l;
2768 :
2769 84525 : output_targetlist = NIL;
2770 374804 : foreach(l, plan->targetlist)
2771 : {
2772 290279 : TargetEntry *tle = (TargetEntry *) lfirst(l);
2773 290279 : Var *oldvar = (Var *) tle->expr;
2774 : Var *newvar;
2775 :
2776 : /*
2777 : * As in search_indexed_tlist_for_non_var(), we prefer to keep Consts
2778 : * as Consts, not Vars referencing Consts. Here, there's no speed
2779 : * advantage to be had, but it makes EXPLAIN output look cleaner, and
2780 : * again it avoids confusing the executor.
2781 : */
2782 290279 : if (IsA(oldvar, Const))
2783 : {
2784 : /* just reuse the existing TLE node */
2785 11201 : output_targetlist = lappend(output_targetlist, tle);
2786 11201 : continue;
2787 : }
2788 :
2789 279078 : newvar = makeVar(OUTER_VAR,
2790 279078 : tle->resno,
2791 : exprType((Node *) oldvar),
2792 : exprTypmod((Node *) oldvar),
2793 : exprCollation((Node *) oldvar),
2794 : 0);
2795 279078 : if (IsA(oldvar, Var) &&
2796 221668 : oldvar->varnosyn > 0)
2797 : {
2798 201269 : newvar->varnosyn = oldvar->varnosyn + rtoffset;
2799 201269 : newvar->varattnosyn = oldvar->varattnosyn;
2800 : }
2801 : else
2802 : {
2803 77809 : newvar->varnosyn = 0; /* wasn't ever a plain Var */
2804 77809 : newvar->varattnosyn = 0;
2805 : }
2806 :
2807 279078 : tle = flatCopyTargetEntry(tle);
2808 279078 : tle->expr = (Expr *) newvar;
2809 279078 : output_targetlist = lappend(output_targetlist, tle);
2810 : }
2811 84525 : plan->targetlist = output_targetlist;
2812 :
2813 : /* We don't touch plan->qual here */
2814 84525 : }
2815 :
2816 :
2817 : /*
2818 : * build_tlist_index --- build an index data structure for a child tlist
2819 : *
2820 : * In most cases, subplan tlists will be "flat" tlists with only Vars,
2821 : * so we try to optimize that case by extracting information about Vars
2822 : * in advance. Matching a parent tlist to a child is still an O(N^2)
2823 : * operation, but at least with a much smaller constant factor than plain
2824 : * tlist_member() searches.
2825 : *
2826 : * The result of this function is an indexed_tlist struct to pass to
2827 : * search_indexed_tlist_for_var() and siblings.
2828 : * When done, the indexed_tlist may be freed with a single pfree().
2829 : */
2830 : static indexed_tlist *
2831 214361 : build_tlist_index(List *tlist)
2832 : {
2833 : indexed_tlist *itlist;
2834 : tlist_vinfo *vinfo;
2835 : ListCell *l;
2836 :
2837 : /* Create data structure with enough slots for all tlist entries */
2838 : itlist = (indexed_tlist *)
2839 214361 : palloc(offsetof(indexed_tlist, vars) +
2840 214361 : list_length(tlist) * sizeof(tlist_vinfo));
2841 :
2842 214361 : itlist->tlist = tlist;
2843 214361 : itlist->has_ph_vars = false;
2844 214361 : itlist->has_non_vars = false;
2845 :
2846 : /* Find the Vars and fill in the index array */
2847 214361 : vinfo = itlist->vars;
2848 2003342 : foreach(l, tlist)
2849 : {
2850 1788981 : TargetEntry *tle = (TargetEntry *) lfirst(l);
2851 :
2852 1788981 : if (tle->expr && IsA(tle->expr, Var))
2853 1778789 : {
2854 1778789 : Var *var = (Var *) tle->expr;
2855 :
2856 1778789 : vinfo->varno = var->varno;
2857 1778789 : vinfo->varattno = var->varattno;
2858 1778789 : vinfo->resno = tle->resno;
2859 1778789 : vinfo->varnullingrels = var->varnullingrels;
2860 1778789 : vinfo++;
2861 : }
2862 10192 : else if (tle->expr && IsA(tle->expr, PlaceHolderVar))
2863 1771 : itlist->has_ph_vars = true;
2864 : else
2865 8421 : itlist->has_non_vars = true;
2866 : }
2867 :
2868 214361 : itlist->num_vars = (vinfo - itlist->vars);
2869 :
2870 214361 : return itlist;
2871 : }
2872 :
2873 : /*
2874 : * build_tlist_index_other_vars --- build a restricted tlist index
2875 : *
2876 : * This is like build_tlist_index, but we only index tlist entries that
2877 : * are Vars belonging to some rel other than the one specified. We will set
2878 : * has_ph_vars (allowing PlaceHolderVars to be matched), but not has_non_vars
2879 : * (so nothing other than Vars and PlaceHolderVars can be matched).
2880 : */
2881 : static indexed_tlist *
2882 1896 : build_tlist_index_other_vars(List *tlist, int ignore_rel)
2883 : {
2884 : indexed_tlist *itlist;
2885 : tlist_vinfo *vinfo;
2886 : ListCell *l;
2887 :
2888 : /* Create data structure with enough slots for all tlist entries */
2889 : itlist = (indexed_tlist *)
2890 1896 : palloc(offsetof(indexed_tlist, vars) +
2891 1896 : list_length(tlist) * sizeof(tlist_vinfo));
2892 :
2893 1896 : itlist->tlist = tlist;
2894 1896 : itlist->has_ph_vars = false;
2895 1896 : itlist->has_non_vars = false;
2896 :
2897 : /* Find the desired Vars and fill in the index array */
2898 1896 : vinfo = itlist->vars;
2899 7246 : foreach(l, tlist)
2900 : {
2901 5350 : TargetEntry *tle = (TargetEntry *) lfirst(l);
2902 :
2903 5350 : if (tle->expr && IsA(tle->expr, Var))
2904 2824 : {
2905 2824 : Var *var = (Var *) tle->expr;
2906 :
2907 2824 : if (var->varno != ignore_rel)
2908 : {
2909 2153 : vinfo->varno = var->varno;
2910 2153 : vinfo->varattno = var->varattno;
2911 2153 : vinfo->resno = tle->resno;
2912 2153 : vinfo->varnullingrels = var->varnullingrels;
2913 2153 : vinfo++;
2914 : }
2915 : }
2916 2526 : else if (tle->expr && IsA(tle->expr, PlaceHolderVar))
2917 60 : itlist->has_ph_vars = true;
2918 : }
2919 :
2920 1896 : itlist->num_vars = (vinfo - itlist->vars);
2921 :
2922 1896 : return itlist;
2923 : }
2924 :
2925 : /*
2926 : * search_indexed_tlist_for_var --- find a Var in an indexed tlist
2927 : *
2928 : * If a match is found, return a copy of the given Var with suitably
2929 : * modified varno/varattno (to wit, newvarno and the resno of the TLE entry).
2930 : * Also ensure that varnosyn is incremented by rtoffset.
2931 : * If no match, return NULL.
2932 : *
2933 : * We cross-check the varnullingrels of the subplan output Var based on
2934 : * nrm_match. Most call sites should pass NRM_EQUAL indicating we expect
2935 : * an exact match. However, there are places where we haven't cleaned
2936 : * things up completely, and we have to settle for allowing subset or
2937 : * superset matches.
2938 : */
2939 : static Var *
2940 803173 : search_indexed_tlist_for_var(Var *var, indexed_tlist *itlist,
2941 : int newvarno, int rtoffset,
2942 : NullingRelsMatch nrm_match)
2943 : {
2944 803173 : int varno = var->varno;
2945 803173 : AttrNumber varattno = var->varattno;
2946 : tlist_vinfo *vinfo;
2947 : int i;
2948 :
2949 803173 : vinfo = itlist->vars;
2950 803173 : i = itlist->num_vars;
2951 5735467 : while (i-- > 0)
2952 : {
2953 5551184 : if (vinfo->varno == varno && vinfo->varattno == varattno)
2954 : {
2955 : /* Found a match */
2956 618890 : Var *newvar = copyVar(var);
2957 :
2958 : /*
2959 : * Verify that we kept all the nullingrels machinations straight.
2960 : *
2961 : * XXX we skip the check for system columns and whole-row Vars.
2962 : * That's because such Vars might be row identity Vars, which are
2963 : * generated without any varnullingrels. It'd be hard to do
2964 : * otherwise, since they're normally made very early in planning,
2965 : * when we haven't looked at the jointree yet and don't know which
2966 : * joins might null such Vars. Doesn't seem worth the expense to
2967 : * make them fully valid. (While it's slightly annoying that we
2968 : * thereby lose checking for user-written references to such
2969 : * columns, it seems unlikely that a bug in nullingrels logic
2970 : * would affect only system columns.)
2971 : */
2972 1220642 : if (!(varattno <= 0 ||
2973 : (nrm_match == NRM_SUBSET ?
2974 28519 : bms_is_subset(var->varnullingrels, vinfo->varnullingrels) :
2975 : nrm_match == NRM_SUPERSET ?
2976 184390 : bms_is_subset(vinfo->varnullingrels, var->varnullingrels) :
2977 388843 : bms_equal(vinfo->varnullingrels, var->varnullingrels))))
2978 0 : elog(ERROR, "wrong varnullingrels %s (expected %s) for Var %d/%d",
2979 : bmsToString(var->varnullingrels),
2980 : bmsToString(vinfo->varnullingrels),
2981 : varno, varattno);
2982 :
2983 618890 : newvar->varno = newvarno;
2984 618890 : newvar->varattno = vinfo->resno;
2985 618890 : if (newvar->varnosyn > 0)
2986 618587 : newvar->varnosyn += rtoffset;
2987 618890 : return newvar;
2988 : }
2989 4932294 : vinfo++;
2990 : }
2991 184283 : return NULL; /* no match */
2992 : }
2993 :
2994 : /*
2995 : * search_indexed_tlist_for_phv --- find a PlaceHolderVar in an indexed tlist
2996 : *
2997 : * If a match is found, return a Var constructed to reference the tlist item.
2998 : * If no match, return NULL.
2999 : *
3000 : * Cross-check phnullingrels as in search_indexed_tlist_for_var.
3001 : *
3002 : * NOTE: it is a waste of time to call this unless itlist->has_ph_vars.
3003 : */
3004 : static Var *
3005 1749 : search_indexed_tlist_for_phv(PlaceHolderVar *phv,
3006 : indexed_tlist *itlist, int newvarno,
3007 : NullingRelsMatch nrm_match)
3008 : {
3009 : ListCell *lc;
3010 :
3011 4309 : foreach(lc, itlist->tlist)
3012 : {
3013 4145 : TargetEntry *tle = (TargetEntry *) lfirst(lc);
3014 :
3015 4145 : if (tle->expr && IsA(tle->expr, PlaceHolderVar))
3016 : {
3017 2280 : PlaceHolderVar *subphv = (PlaceHolderVar *) tle->expr;
3018 : Var *newvar;
3019 :
3020 : /*
3021 : * Analogously to search_indexed_tlist_for_var, we match on phid
3022 : * only. We don't use equal(), partially for speed but mostly
3023 : * because phnullingrels might not be exactly equal.
3024 : */
3025 2280 : if (phv->phid != subphv->phid)
3026 695 : continue;
3027 :
3028 : /* Verify that we kept all the nullingrels machinations straight */
3029 3170 : if (!(nrm_match == NRM_SUBSET ?
3030 126 : bms_is_subset(phv->phnullingrels, subphv->phnullingrels) :
3031 : nrm_match == NRM_SUPERSET ?
3032 774 : bms_is_subset(subphv->phnullingrels, phv->phnullingrels) :
3033 685 : bms_equal(subphv->phnullingrels, phv->phnullingrels)))
3034 0 : elog(ERROR, "wrong phnullingrels %s (expected %s) for PlaceHolderVar %d",
3035 : bmsToString(phv->phnullingrels),
3036 : bmsToString(subphv->phnullingrels),
3037 : phv->phid);
3038 :
3039 : /* Found a matching subplan output expression */
3040 1585 : newvar = makeVarFromTargetEntry(newvarno, tle);
3041 1585 : newvar->varnosyn = 0; /* wasn't ever a plain Var */
3042 1585 : newvar->varattnosyn = 0;
3043 1585 : return newvar;
3044 : }
3045 : }
3046 164 : return NULL; /* no match */
3047 : }
3048 :
3049 : /*
3050 : * search_indexed_tlist_for_non_var --- find a non-Var/PHV in an indexed tlist
3051 : *
3052 : * If a match is found, return a Var constructed to reference the tlist item.
3053 : * If no match, return NULL.
3054 : *
3055 : * NOTE: it is a waste of time to call this unless itlist->has_non_vars.
3056 : */
3057 : static Var *
3058 19218 : search_indexed_tlist_for_non_var(Expr *node,
3059 : indexed_tlist *itlist, int newvarno)
3060 : {
3061 : TargetEntry *tle;
3062 :
3063 : /*
3064 : * If it's a simple Const, replacing it with a Var is silly, even if there
3065 : * happens to be an identical Const below; a Var is more expensive to
3066 : * execute than a Const. What's more, replacing it could confuse some
3067 : * places in the executor that expect to see simple Consts for, eg,
3068 : * dropped columns.
3069 : */
3070 19218 : if (IsA(node, Const))
3071 1008 : return NULL;
3072 :
3073 18210 : tle = tlist_member(node, itlist->tlist);
3074 18210 : if (tle)
3075 : {
3076 : /* Found a matching subplan output expression */
3077 : Var *newvar;
3078 :
3079 4696 : newvar = makeVarFromTargetEntry(newvarno, tle);
3080 4696 : newvar->varnosyn = 0; /* wasn't ever a plain Var */
3081 4696 : newvar->varattnosyn = 0;
3082 4696 : return newvar;
3083 : }
3084 13514 : return NULL; /* no match */
3085 : }
3086 :
3087 : /*
3088 : * search_indexed_tlist_for_sortgroupref --- find a sort/group expression
3089 : *
3090 : * If a match is found, return a Var constructed to reference the tlist item.
3091 : * If no match, return NULL.
3092 : *
3093 : * This is needed to ensure that we select the right subplan TLE in cases
3094 : * where there are multiple textually-equal()-but-volatile sort expressions.
3095 : * And it's also faster than search_indexed_tlist_for_non_var.
3096 : */
3097 : static Var *
3098 20087 : search_indexed_tlist_for_sortgroupref(Expr *node,
3099 : Index sortgroupref,
3100 : indexed_tlist *itlist,
3101 : int newvarno)
3102 : {
3103 : ListCell *lc;
3104 :
3105 90221 : foreach(lc, itlist->tlist)
3106 : {
3107 79052 : TargetEntry *tle = (TargetEntry *) lfirst(lc);
3108 :
3109 : /*
3110 : * Usually the equal() check is redundant, but in setop plans it may
3111 : * not be, since prepunion.c assigns ressortgroupref equal to the
3112 : * column resno without regard to whether that matches the topmost
3113 : * level's sortgrouprefs and without regard to whether any implicit
3114 : * coercions are added in the setop tree. We might have to clean that
3115 : * up someday; but for now, just ignore any false matches.
3116 : */
3117 88036 : if (tle->ressortgroupref == sortgroupref &&
3118 8984 : equal(node, tle->expr))
3119 : {
3120 : /* Found a matching subplan output expression */
3121 : Var *newvar;
3122 :
3123 8918 : newvar = makeVarFromTargetEntry(newvarno, tle);
3124 8918 : newvar->varnosyn = 0; /* wasn't ever a plain Var */
3125 8918 : newvar->varattnosyn = 0;
3126 8918 : return newvar;
3127 : }
3128 : }
3129 11169 : return NULL; /* no match */
3130 : }
3131 :
3132 : /*
3133 : * fix_join_expr
3134 : * Create a new set of targetlist entries or join qual clauses by
3135 : * changing the varno/varattno values of variables in the clauses
3136 : * to reference target list values from the outer and inner join
3137 : * relation target lists. Also perform opcode lookup and add
3138 : * regclass OIDs to root->glob->relationOids.
3139 : *
3140 : * This is used in four different scenarios:
3141 : * 1) a normal join clause, where all the Vars in the clause *must* be
3142 : * replaced by OUTER_VAR or INNER_VAR references. In this case
3143 : * acceptable_rel should be zero so that any failure to match a Var will be
3144 : * reported as an error.
3145 : * 2) RETURNING clauses, which may contain both Vars of the target relation
3146 : * and Vars of other relations. In this case we want to replace the
3147 : * other-relation Vars by OUTER_VAR references, while leaving target Vars
3148 : * alone. Thus inner_itlist = NULL and acceptable_rel = the ID of the
3149 : * target relation should be passed.
3150 : * 3) ON CONFLICT SET and WHERE clauses. Here references to EXCLUDED are
3151 : * to be replaced with INNER_VAR references, while leaving target Vars (the
3152 : * to-be-updated relation) alone. Correspondingly inner_itlist is to be
3153 : * EXCLUDED elements, outer_itlist = NULL and acceptable_rel the target
3154 : * relation.
3155 : * 4) MERGE. In this case, references to the source relation are to be
3156 : * replaced with INNER_VAR references, leaving Vars of the target
3157 : * relation (the to-be-modified relation) alone. So inner_itlist is to be
3158 : * the source relation elements, outer_itlist = NULL and acceptable_rel
3159 : * the target relation.
3160 : *
3161 : * 'clauses' is the targetlist or list of join clauses
3162 : * 'outer_itlist' is the indexed target list of the outer join relation,
3163 : * or NULL
3164 : * 'inner_itlist' is the indexed target list of the inner join relation,
3165 : * or NULL
3166 : * 'acceptable_rel' is either zero or the rangetable index of a relation
3167 : * whose Vars may appear in the clause without provoking an error
3168 : * 'rtoffset': how much to increment varnos by
3169 : * 'nrm_match': as for search_indexed_tlist_for_var()
3170 : * 'num_exec': estimated number of executions of expression
3171 : *
3172 : * Returns the new expression tree. The original clause structure is
3173 : * not modified.
3174 : */
3175 : static List *
3176 246745 : fix_join_expr(PlannerInfo *root,
3177 : List *clauses,
3178 : indexed_tlist *outer_itlist,
3179 : indexed_tlist *inner_itlist,
3180 : Index acceptable_rel,
3181 : int rtoffset,
3182 : NullingRelsMatch nrm_match,
3183 : double num_exec)
3184 : {
3185 : fix_join_expr_context context;
3186 :
3187 246745 : context.root = root;
3188 246745 : context.outer_itlist = outer_itlist;
3189 246745 : context.inner_itlist = inner_itlist;
3190 246745 : context.acceptable_rel = acceptable_rel;
3191 246745 : context.rtoffset = rtoffset;
3192 246745 : context.nrm_match = nrm_match;
3193 246745 : context.num_exec = num_exec;
3194 246745 : return (List *) fix_join_expr_mutator((Node *) clauses, &context);
3195 : }
3196 :
3197 : static Node *
3198 1553297 : fix_join_expr_mutator(Node *node, fix_join_expr_context *context)
3199 : {
3200 : Var *newvar;
3201 :
3202 1553297 : if (node == NULL)
3203 154155 : return NULL;
3204 1399142 : if (IsA(node, Var))
3205 : {
3206 506819 : Var *var = (Var *) node;
3207 :
3208 : /*
3209 : * Verify that Vars with non-default varreturningtype only appear in
3210 : * the RETURNING list, and refer to the target relation.
3211 : */
3212 506819 : if (var->varreturningtype != VAR_RETURNING_DEFAULT)
3213 : {
3214 1401 : if (context->inner_itlist != NULL ||
3215 1401 : context->outer_itlist == NULL ||
3216 1401 : context->acceptable_rel == 0)
3217 0 : elog(ERROR, "variable returning old/new found outside RETURNING list");
3218 1401 : if (var->varno != context->acceptable_rel)
3219 0 : elog(ERROR, "wrong varno %d (expected %d) for variable returning old/new",
3220 : var->varno, context->acceptable_rel);
3221 : }
3222 :
3223 : /* Look for the var in the input tlists, first in the outer */
3224 506819 : if (context->outer_itlist)
3225 : {
3226 503100 : newvar = search_indexed_tlist_for_var(var,
3227 : context->outer_itlist,
3228 : OUTER_VAR,
3229 : context->rtoffset,
3230 : context->nrm_match);
3231 503100 : if (newvar)
3232 320548 : return (Node *) newvar;
3233 : }
3234 :
3235 : /* then in the inner. */
3236 186271 : if (context->inner_itlist)
3237 : {
3238 180417 : newvar = search_indexed_tlist_for_var(var,
3239 : context->inner_itlist,
3240 : INNER_VAR,
3241 : context->rtoffset,
3242 : context->nrm_match);
3243 180417 : if (newvar)
3244 178686 : return (Node *) newvar;
3245 : }
3246 :
3247 : /* If it's for acceptable_rel, adjust and return it */
3248 7585 : if (var->varno == context->acceptable_rel)
3249 : {
3250 7585 : var = copyVar(var);
3251 7585 : var->varno += context->rtoffset;
3252 7585 : if (var->varnosyn > 0)
3253 7248 : var->varnosyn += context->rtoffset;
3254 7585 : return (Node *) var;
3255 : }
3256 :
3257 : /* No referent found for Var */
3258 0 : elog(ERROR, "variable not found in subplan target lists");
3259 : }
3260 892323 : if (IsA(node, PlaceHolderVar))
3261 : {
3262 1322 : PlaceHolderVar *phv = (PlaceHolderVar *) node;
3263 :
3264 : /* See if the PlaceHolderVar has bubbled up from a lower plan node */
3265 1322 : if (context->outer_itlist && context->outer_itlist->has_ph_vars)
3266 : {
3267 468 : newvar = search_indexed_tlist_for_phv(phv,
3268 : context->outer_itlist,
3269 : OUTER_VAR,
3270 : context->nrm_match);
3271 468 : if (newvar)
3272 334 : return (Node *) newvar;
3273 : }
3274 988 : if (context->inner_itlist && context->inner_itlist->has_ph_vars)
3275 : {
3276 790 : newvar = search_indexed_tlist_for_phv(phv,
3277 : context->inner_itlist,
3278 : INNER_VAR,
3279 : context->nrm_match);
3280 790 : if (newvar)
3281 760 : return (Node *) newvar;
3282 : }
3283 :
3284 : /* If not supplied by input plans, evaluate the contained expr */
3285 : /* XXX can we assert something about phnullingrels? */
3286 228 : return fix_join_expr_mutator((Node *) phv->phexpr, context);
3287 : }
3288 : /* Try matching more complex expressions too, if tlists have any */
3289 891001 : if (context->outer_itlist && context->outer_itlist->has_non_vars)
3290 : {
3291 840 : newvar = search_indexed_tlist_for_non_var((Expr *) node,
3292 : context->outer_itlist,
3293 : OUTER_VAR);
3294 840 : if (newvar)
3295 65 : return (Node *) newvar;
3296 : }
3297 890936 : if (context->inner_itlist && context->inner_itlist->has_non_vars)
3298 : {
3299 3277 : newvar = search_indexed_tlist_for_non_var((Expr *) node,
3300 : context->inner_itlist,
3301 : INNER_VAR);
3302 3277 : if (newvar)
3303 590 : return (Node *) newvar;
3304 : }
3305 : /* Special cases (apply only AFTER failing to match to lower tlist) */
3306 890346 : if (IsA(node, Param))
3307 2985 : return fix_param_node(context->root, (Param *) node);
3308 887361 : if (IsA(node, AlternativeSubPlan))
3309 753 : return fix_join_expr_mutator(fix_alternative_subplan(context->root,
3310 : (AlternativeSubPlan *) node,
3311 : context->num_exec),
3312 : context);
3313 886608 : fix_expr_common(context->root, node);
3314 886608 : return expression_tree_mutator(node, fix_join_expr_mutator, context);
3315 : }
3316 :
3317 : /*
3318 : * fix_upper_expr
3319 : * Modifies an expression tree so that all Var nodes reference outputs
3320 : * of a subplan. Also looks for Aggref nodes that should be replaced
3321 : * by initplan output Params. Also performs opcode lookup, and adds
3322 : * regclass OIDs to root->glob->relationOids.
3323 : *
3324 : * This is used to fix up target and qual expressions of non-join upper-level
3325 : * plan nodes, as well as index-only scan nodes.
3326 : *
3327 : * An error is raised if no matching var can be found in the subplan tlist
3328 : * --- so this routine should only be applied to nodes whose subplans'
3329 : * targetlists were generated by flattening the expressions used in the
3330 : * parent node.
3331 : *
3332 : * If itlist->has_non_vars is true, then we try to match whole subexpressions
3333 : * against elements of the subplan tlist, so that we can avoid recomputing
3334 : * expressions that were already computed by the subplan. (This is relatively
3335 : * expensive, so we don't want to try it in the common case where the
3336 : * subplan tlist is just a flattened list of Vars.)
3337 : *
3338 : * 'node': the tree to be fixed (a target item or qual)
3339 : * 'subplan_itlist': indexed target list for subplan (or index)
3340 : * 'newvarno': varno to use for Vars referencing tlist elements
3341 : * 'rtoffset': how much to increment varnos by
3342 : * 'nrm_match': as for search_indexed_tlist_for_var()
3343 : * 'num_exec': estimated number of executions of expression
3344 : *
3345 : * The resulting tree is a copy of the original in which all Var nodes have
3346 : * varno = newvarno, varattno = resno of corresponding targetlist element.
3347 : * The original tree is not modified.
3348 : */
3349 : static Node *
3350 190161 : fix_upper_expr(PlannerInfo *root,
3351 : Node *node,
3352 : indexed_tlist *subplan_itlist,
3353 : int newvarno,
3354 : int rtoffset,
3355 : NullingRelsMatch nrm_match,
3356 : double num_exec)
3357 : {
3358 : fix_upper_expr_context context;
3359 :
3360 190161 : context.root = root;
3361 190161 : context.subplan_itlist = subplan_itlist;
3362 190161 : context.newvarno = newvarno;
3363 190161 : context.rtoffset = rtoffset;
3364 190161 : context.nrm_match = nrm_match;
3365 190161 : context.num_exec = num_exec;
3366 190161 : return fix_upper_expr_mutator(node, &context);
3367 : }
3368 :
3369 : static Node *
3370 542904 : fix_upper_expr_mutator(Node *node, fix_upper_expr_context *context)
3371 : {
3372 : Var *newvar;
3373 :
3374 542904 : if (node == NULL)
3375 176464 : return NULL;
3376 366440 : if (IsA(node, Var))
3377 : {
3378 119656 : Var *var = (Var *) node;
3379 :
3380 119656 : newvar = search_indexed_tlist_for_var(var,
3381 : context->subplan_itlist,
3382 : context->newvarno,
3383 : context->rtoffset,
3384 : context->nrm_match);
3385 119656 : if (!newvar)
3386 0 : elog(ERROR, "variable not found in subplan target list");
3387 119656 : return (Node *) newvar;
3388 : }
3389 246784 : if (IsA(node, PlaceHolderVar))
3390 : {
3391 560 : PlaceHolderVar *phv = (PlaceHolderVar *) node;
3392 :
3393 : /* See if the PlaceHolderVar has bubbled up from a lower plan node */
3394 560 : if (context->subplan_itlist->has_ph_vars)
3395 : {
3396 491 : newvar = search_indexed_tlist_for_phv(phv,
3397 : context->subplan_itlist,
3398 : context->newvarno,
3399 : context->nrm_match);
3400 491 : if (newvar)
3401 491 : return (Node *) newvar;
3402 : }
3403 : /* If not supplied by input plan, evaluate the contained expr */
3404 : /* XXX can we assert something about phnullingrels? */
3405 69 : return fix_upper_expr_mutator((Node *) phv->phexpr, context);
3406 : }
3407 : /* Try matching more complex expressions too, if tlist has any */
3408 246224 : if (context->subplan_itlist->has_non_vars)
3409 : {
3410 15011 : newvar = search_indexed_tlist_for_non_var((Expr *) node,
3411 : context->subplan_itlist,
3412 : context->newvarno);
3413 15011 : if (newvar)
3414 3951 : return (Node *) newvar;
3415 : }
3416 : /* Special cases (apply only AFTER failing to match to lower tlist) */
3417 242273 : if (IsA(node, Param))
3418 4851 : return fix_param_node(context->root, (Param *) node);
3419 237422 : if (IsA(node, Aggref))
3420 : {
3421 27635 : Aggref *aggref = (Aggref *) node;
3422 : Param *aggparam;
3423 :
3424 : /* See if the Aggref should be replaced by a Param */
3425 27635 : aggparam = find_minmax_agg_replacement_param(context->root, aggref);
3426 27635 : if (aggparam != NULL)
3427 : {
3428 : /* Make a copy of the Param for paranoia's sake */
3429 0 : return (Node *) copyObject(aggparam);
3430 : }
3431 : /* If no match, just fall through to process it normally */
3432 : }
3433 237422 : if (IsA(node, AlternativeSubPlan))
3434 18 : return fix_upper_expr_mutator(fix_alternative_subplan(context->root,
3435 : (AlternativeSubPlan *) node,
3436 : context->num_exec),
3437 : context);
3438 237404 : fix_expr_common(context->root, node);
3439 237404 : return expression_tree_mutator(node, fix_upper_expr_mutator, context);
3440 : }
3441 :
3442 : /*
3443 : * set_returning_clause_references
3444 : * Perform setrefs.c's work on a RETURNING targetlist
3445 : *
3446 : * If the query involves more than just the result table, we have to
3447 : * adjust any Vars that refer to other tables to reference junk tlist
3448 : * entries in the top subplan's targetlist. Vars referencing the result
3449 : * table should be left alone, however (the executor will evaluate them
3450 : * using the actual heap tuple, after firing triggers if any). In the
3451 : * adjusted RETURNING list, result-table Vars will have their original
3452 : * varno (plus rtoffset), but Vars for other rels will have varno OUTER_VAR.
3453 : *
3454 : * We also must perform opcode lookup and add regclass OIDs to
3455 : * root->glob->relationOids.
3456 : *
3457 : * 'rlist': the RETURNING targetlist to be fixed
3458 : * 'topplan': the top subplan node that will be just below the ModifyTable
3459 : * node (note it's not yet passed through set_plan_refs)
3460 : * 'resultRelation': RT index of the associated result relation
3461 : * 'rtoffset': how much to increment varnos by
3462 : *
3463 : * Note: the given 'root' is for the parent query level, not the 'topplan'.
3464 : * This does not matter currently since we only access the dependency-item
3465 : * lists in root->glob, but it would need some hacking if we wanted a root
3466 : * that actually matches the subplan.
3467 : *
3468 : * Note: resultRelation is not yet adjusted by rtoffset.
3469 : */
3470 : static List *
3471 1896 : set_returning_clause_references(PlannerInfo *root,
3472 : List *rlist,
3473 : Plan *topplan,
3474 : Index resultRelation,
3475 : int rtoffset)
3476 : {
3477 : indexed_tlist *itlist;
3478 :
3479 : /*
3480 : * We can perform the desired Var fixup by abusing the fix_join_expr
3481 : * machinery that formerly handled inner indexscan fixup. We search the
3482 : * top plan's targetlist for Vars of non-result relations, and use
3483 : * fix_join_expr to convert RETURNING Vars into references to those tlist
3484 : * entries, while leaving result-rel Vars as-is.
3485 : *
3486 : * PlaceHolderVars will also be sought in the targetlist, but no
3487 : * more-complex expressions will be. Note that it is not possible for a
3488 : * PlaceHolderVar to refer to the result relation, since the result is
3489 : * never below an outer join. If that case could happen, we'd have to be
3490 : * prepared to pick apart the PlaceHolderVar and evaluate its contained
3491 : * expression instead.
3492 : */
3493 1896 : itlist = build_tlist_index_other_vars(topplan->targetlist, resultRelation);
3494 :
3495 1896 : rlist = fix_join_expr(root,
3496 : rlist,
3497 : itlist,
3498 : NULL,
3499 : resultRelation,
3500 : rtoffset,
3501 : NRM_EQUAL,
3502 : NUM_EXEC_TLIST(topplan));
3503 :
3504 1896 : pfree(itlist);
3505 :
3506 1896 : return rlist;
3507 : }
3508 :
3509 : /*
3510 : * fix_windowagg_condition_expr_mutator
3511 : * Mutator function for replacing WindowFuncs with the corresponding Var
3512 : * in the targetlist which references that WindowFunc.
3513 : */
3514 : static Node *
3515 1791 : fix_windowagg_condition_expr_mutator(Node *node,
3516 : fix_windowagg_cond_context *context)
3517 : {
3518 1791 : if (node == NULL)
3519 1347 : return NULL;
3520 :
3521 444 : if (IsA(node, WindowFunc))
3522 : {
3523 : Var *newvar;
3524 :
3525 90 : newvar = search_indexed_tlist_for_non_var((Expr *) node,
3526 : context->subplan_itlist,
3527 : context->newvarno);
3528 90 : if (newvar)
3529 90 : return (Node *) newvar;
3530 0 : elog(ERROR, "WindowFunc not found in subplan target lists");
3531 : }
3532 :
3533 354 : return expression_tree_mutator(node,
3534 : fix_windowagg_condition_expr_mutator,
3535 : context);
3536 : }
3537 :
3538 : /*
3539 : * fix_windowagg_condition_expr
3540 : * Converts references in 'runcondition' so that any WindowFunc
3541 : * references are swapped out for a Var which references the matching
3542 : * WindowFunc in 'subplan_itlist'.
3543 : */
3544 : static List *
3545 1431 : fix_windowagg_condition_expr(PlannerInfo *root,
3546 : List *runcondition,
3547 : indexed_tlist *subplan_itlist)
3548 : {
3549 : fix_windowagg_cond_context context;
3550 :
3551 1431 : context.root = root;
3552 1431 : context.subplan_itlist = subplan_itlist;
3553 1431 : context.newvarno = 0;
3554 :
3555 1431 : return (List *) fix_windowagg_condition_expr_mutator((Node *) runcondition,
3556 : &context);
3557 : }
3558 :
3559 : /*
3560 : * set_windowagg_runcondition_references
3561 : * Converts references in 'runcondition' so that any WindowFunc
3562 : * references are swapped out for a Var which references the matching
3563 : * WindowFunc in 'plan' targetlist.
3564 : */
3565 : static List *
3566 1431 : set_windowagg_runcondition_references(PlannerInfo *root,
3567 : List *runcondition,
3568 : Plan *plan)
3569 : {
3570 : List *newlist;
3571 : indexed_tlist *itlist;
3572 :
3573 1431 : itlist = build_tlist_index(plan->targetlist);
3574 :
3575 1431 : newlist = fix_windowagg_condition_expr(root, runcondition, itlist);
3576 :
3577 1431 : pfree(itlist);
3578 :
3579 1431 : return newlist;
3580 : }
3581 :
3582 : /*
3583 : * find_minmax_agg_replacement_param
3584 : * If the given Aggref is one that we are optimizing into a subquery
3585 : * (cf. planagg.c), then return the Param that should replace it.
3586 : * Else return NULL.
3587 : *
3588 : * This is exported so that SS_finalize_plan can use it before setrefs.c runs.
3589 : * Note that it will not find anything until we have built a Plan from a
3590 : * MinMaxAggPath, as root->minmax_aggs will never be filled otherwise.
3591 : */
3592 : Param *
3593 39098 : find_minmax_agg_replacement_param(PlannerInfo *root, Aggref *aggref)
3594 : {
3595 39594 : if (root->minmax_aggs != NIL &&
3596 496 : list_length(aggref->args) == 1)
3597 : {
3598 496 : TargetEntry *curTarget = (TargetEntry *) linitial(aggref->args);
3599 : ListCell *lc;
3600 :
3601 544 : foreach(lc, root->minmax_aggs)
3602 : {
3603 544 : MinMaxAggInfo *mminfo = (MinMaxAggInfo *) lfirst(lc);
3604 :
3605 1040 : if (mminfo->aggfnoid == aggref->aggfnoid &&
3606 496 : equal(mminfo->target, curTarget->expr))
3607 496 : return mminfo->param;
3608 : }
3609 : }
3610 38602 : return NULL;
3611 : }
3612 :
3613 :
3614 : /*****************************************************************************
3615 : * QUERY DEPENDENCY MANAGEMENT
3616 : *****************************************************************************/
3617 :
3618 : /*
3619 : * record_plan_function_dependency
3620 : * Mark the current plan as depending on a particular function.
3621 : *
3622 : * This is exported so that the function-inlining code can record a
3623 : * dependency on a function that it's removed from the plan tree.
3624 : */
3625 : void
3626 657341 : record_plan_function_dependency(PlannerInfo *root, Oid funcid)
3627 : {
3628 : /*
3629 : * For performance reasons, we don't bother to track built-in functions;
3630 : * we just assume they'll never change (or at least not in ways that'd
3631 : * invalidate plans using them). For this purpose we can consider a
3632 : * built-in function to be one with OID less than FirstUnpinnedObjectId.
3633 : * Note that the OID generator guarantees never to generate such an OID
3634 : * after startup, even at OID wraparound.
3635 : */
3636 657341 : if (funcid >= (Oid) FirstUnpinnedObjectId)
3637 : {
3638 21865 : PlanInvalItem *inval_item = makeNode(PlanInvalItem);
3639 :
3640 : /*
3641 : * It would work to use any syscache on pg_proc, but the easiest is
3642 : * PROCOID since we already have the function's OID at hand. Note
3643 : * that plancache.c knows we use PROCOID.
3644 : */
3645 21865 : inval_item->cacheId = PROCOID;
3646 21865 : inval_item->hashValue = GetSysCacheHashValue1(PROCOID,
3647 : ObjectIdGetDatum(funcid));
3648 :
3649 21865 : root->glob->invalItems = lappend(root->glob->invalItems, inval_item);
3650 : }
3651 657341 : }
3652 :
3653 : /*
3654 : * record_plan_type_dependency
3655 : * Mark the current plan as depending on a particular type.
3656 : *
3657 : * This is exported so that eval_const_expressions can record a
3658 : * dependency on a domain that it's removed a CoerceToDomain node for.
3659 : *
3660 : * We don't currently need to record dependencies on domains that the
3661 : * plan contains CoerceToDomain nodes for, though that might change in
3662 : * future. Hence, this isn't actually called in this module, though
3663 : * someday fix_expr_common might call it.
3664 : */
3665 : void
3666 9269 : record_plan_type_dependency(PlannerInfo *root, Oid typid)
3667 : {
3668 : /*
3669 : * As in record_plan_function_dependency, ignore the possibility that
3670 : * someone would change a built-in domain.
3671 : */
3672 9269 : if (typid >= (Oid) FirstUnpinnedObjectId)
3673 : {
3674 9269 : PlanInvalItem *inval_item = makeNode(PlanInvalItem);
3675 :
3676 : /*
3677 : * It would work to use any syscache on pg_type, but the easiest is
3678 : * TYPEOID since we already have the type's OID at hand. Note that
3679 : * plancache.c knows we use TYPEOID.
3680 : */
3681 9269 : inval_item->cacheId = TYPEOID;
3682 9269 : inval_item->hashValue = GetSysCacheHashValue1(TYPEOID,
3683 : ObjectIdGetDatum(typid));
3684 :
3685 9269 : root->glob->invalItems = lappend(root->glob->invalItems, inval_item);
3686 : }
3687 9269 : }
3688 :
3689 : /*
3690 : * extract_query_dependencies
3691 : * Given a rewritten, but not yet planned, query or queries
3692 : * (i.e. a Query node or list of Query nodes), extract dependencies
3693 : * just as set_plan_references would do. Also detect whether any
3694 : * rewrite steps were affected by RLS.
3695 : *
3696 : * This is needed by plancache.c to handle invalidation of cached unplanned
3697 : * queries.
3698 : *
3699 : * Note: this does not go through eval_const_expressions, and hence doesn't
3700 : * reflect its additions of inlined functions and elided CoerceToDomain nodes
3701 : * to the invalItems list. This is obviously OK for functions, since we'll
3702 : * see them in the original query tree anyway. For domains, it's OK because
3703 : * we don't care about domains unless they get elided. That is, a plan might
3704 : * have domain dependencies that the query tree doesn't.
3705 : */
3706 : void
3707 31777 : extract_query_dependencies(Node *query,
3708 : List **relationOids,
3709 : List **invalItems,
3710 : bool *hasRowSecurity)
3711 : {
3712 : PlannerGlobal glob;
3713 : PlannerInfo root;
3714 :
3715 : /* Make up dummy planner state so we can use this module's machinery */
3716 921533 : MemSet(&glob, 0, sizeof(glob));
3717 31777 : glob.type = T_PlannerGlobal;
3718 31777 : glob.relationOids = NIL;
3719 31777 : glob.invalItems = NIL;
3720 : /* Hack: we use glob.dependsOnRole to collect hasRowSecurity flags */
3721 31777 : glob.dependsOnRole = false;
3722 :
3723 2955261 : MemSet(&root, 0, sizeof(root));
3724 31777 : root.type = T_PlannerInfo;
3725 31777 : root.glob = &glob;
3726 :
3727 31777 : (void) extract_query_dependencies_walker(query, &root);
3728 :
3729 31777 : *relationOids = glob.relationOids;
3730 31777 : *invalItems = glob.invalItems;
3731 31777 : *hasRowSecurity = glob.dependsOnRole;
3732 31777 : }
3733 :
3734 : /*
3735 : * Tree walker for extract_query_dependencies.
3736 : *
3737 : * This is exported so that expression_planner_with_deps can call it on
3738 : * simple expressions (post-planning, not before planning, in that case).
3739 : * In that usage, glob.dependsOnRole isn't meaningful, but the relationOids
3740 : * and invalItems lists are added to as needed.
3741 : */
3742 : bool
3743 863684 : extract_query_dependencies_walker(Node *node, PlannerInfo *context)
3744 : {
3745 863684 : if (node == NULL)
3746 407599 : return false;
3747 : Assert(!IsA(node, PlaceHolderVar));
3748 456085 : if (IsA(node, Query))
3749 : {
3750 33970 : Query *query = (Query *) node;
3751 : ListCell *lc;
3752 :
3753 33970 : if (query->commandType == CMD_UTILITY)
3754 : {
3755 : /*
3756 : * This logic must handle any utility command for which parse
3757 : * analysis was nontrivial (cf. stmt_requires_parse_analysis).
3758 : *
3759 : * Notably, CALL requires its own processing.
3760 : */
3761 4985 : if (IsA(query->utilityStmt, CallStmt))
3762 : {
3763 58 : CallStmt *callstmt = (CallStmt *) query->utilityStmt;
3764 :
3765 : /* We need not examine funccall, just the transformed exprs */
3766 58 : (void) extract_query_dependencies_walker((Node *) callstmt->funcexpr,
3767 : context);
3768 58 : (void) extract_query_dependencies_walker((Node *) callstmt->outargs,
3769 : context);
3770 58 : return false;
3771 : }
3772 :
3773 : /*
3774 : * Ignore other utility statements, except those (such as EXPLAIN)
3775 : * that contain a parsed-but-not-planned query. For those, we
3776 : * just need to transfer our attention to the contained query.
3777 : */
3778 4927 : query = UtilityContainsQuery(query->utilityStmt);
3779 4927 : if (query == NULL)
3780 18 : return false;
3781 : }
3782 :
3783 : /* Remember if any Query has RLS quals applied by rewriter */
3784 33894 : if (query->hasRowSecurity)
3785 114 : context->glob->dependsOnRole = true;
3786 :
3787 : /* Collect relation OIDs in this Query's rtable */
3788 54922 : foreach(lc, query->rtable)
3789 : {
3790 21028 : RangeTblEntry *rte = (RangeTblEntry *) lfirst(lc);
3791 :
3792 21028 : if (rte->rtekind == RTE_RELATION ||
3793 3813 : (rte->rtekind == RTE_SUBQUERY && OidIsValid(rte->relid)) ||
3794 3579 : (rte->rtekind == RTE_NAMEDTUPLESTORE && OidIsValid(rte->relid)))
3795 17682 : context->glob->relationOids =
3796 17682 : lappend_oid(context->glob->relationOids, rte->relid);
3797 : }
3798 :
3799 : /* And recurse into the query's subexpressions */
3800 33894 : return query_tree_walker(query, extract_query_dependencies_walker,
3801 : context, 0);
3802 : }
3803 : /* Extract function dependencies and check for regclass Consts */
3804 422115 : fix_expr_common(context, node);
3805 422115 : return expression_tree_walker(node, extract_query_dependencies_walker,
3806 : context);
3807 : }
3808 :
3809 : /*
3810 : * Record some details about a node removed from the plan during setrefs
3811 : * processing, for the benefit of code trying to reconstruct planner decisions
3812 : * from examination of the final plan tree.
3813 : */
3814 : static void
3815 12518 : record_elided_node(PlannerGlobal *glob, int plan_node_id,
3816 : NodeTag elided_type, Bitmapset *relids)
3817 : {
3818 12518 : ElidedNode *n = makeNode(ElidedNode);
3819 :
3820 12518 : n->plan_node_id = plan_node_id;
3821 12518 : n->elided_type = elided_type;
3822 12518 : n->relids = relids;
3823 :
3824 12518 : glob->elidedNodes = lappend(glob->elidedNodes, n);
3825 12518 : }
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