Age Owner Branch data TLA Line data Source code
1 : : /*-------------------------------------------------------------------------
2 : : *
3 : : * plancat.c
4 : : * routines for accessing the system catalogs
5 : : *
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/util/plancat.c
13 : : *
14 : : *-------------------------------------------------------------------------
15 : : */
16 : : #include "postgres.h"
17 : :
18 : : #include <math.h>
19 : :
20 : : #include "access/genam.h"
21 : : #include "access/htup_details.h"
22 : : #include "access/nbtree.h"
23 : : #include "access/sysattr.h"
24 : : #include "access/table.h"
25 : : #include "access/tableam.h"
26 : : #include "access/transam.h"
27 : : #include "access/xlog.h"
28 : : #include "catalog/catalog.h"
29 : : #include "catalog/heap.h"
30 : : #include "catalog/index.h"
31 : : #include "catalog/pg_am.h"
32 : : #include "catalog/pg_proc.h"
33 : : #include "catalog/pg_statistic_ext.h"
34 : : #include "catalog/pg_statistic_ext_data.h"
35 : : #include "foreign/fdwapi.h"
36 : : #include "miscadmin.h"
37 : : #include "nodes/makefuncs.h"
38 : : #include "nodes/nodeFuncs.h"
39 : : #include "nodes/supportnodes.h"
40 : : #include "optimizer/cost.h"
41 : : #include "optimizer/optimizer.h"
42 : : #include "optimizer/plancat.h"
43 : : #include "parser/parse_relation.h"
44 : : #include "parser/parsetree.h"
45 : : #include "partitioning/partdesc.h"
46 : : #include "rewrite/rewriteHandler.h"
47 : : #include "rewrite/rewriteManip.h"
48 : : #include "statistics/statistics.h"
49 : : #include "storage/bufmgr.h"
50 : : #include "tcop/tcopprot.h"
51 : : #include "utils/builtins.h"
52 : : #include "utils/lsyscache.h"
53 : : #include "utils/partcache.h"
54 : : #include "utils/rel.h"
55 : : #include "utils/snapmgr.h"
56 : : #include "utils/syscache.h"
57 : :
58 : : /* GUC parameter */
59 : : int constraint_exclusion = CONSTRAINT_EXCLUSION_PARTITION;
60 : :
61 : : typedef struct NotnullHashEntry
62 : : {
63 : : Oid relid; /* OID of the relation */
64 : : Bitmapset *notnullattnums; /* attnums of NOT NULL columns */
65 : : } NotnullHashEntry;
66 : :
67 : :
68 : : static void get_relation_foreign_keys(PlannerInfo *root, RelOptInfo *rel,
69 : : Relation relation, bool inhparent);
70 : : static bool infer_collation_opclass_match(InferenceElem *elem, Relation idxRel,
71 : : List *idxExprs);
72 : : static List *get_relation_constraints(PlannerInfo *root,
73 : : Oid relationObjectId, RelOptInfo *rel,
74 : : bool include_noinherit,
75 : : bool include_notnull,
76 : : bool include_partition);
77 : : static List *build_index_tlist(PlannerInfo *root, IndexOptInfo *index,
78 : : Relation heapRelation);
79 : : static List *get_relation_statistics(PlannerInfo *root, RelOptInfo *rel,
80 : : Relation relation);
81 : : static void set_relation_partition_info(PlannerInfo *root, RelOptInfo *rel,
82 : : Relation relation);
83 : : static PartitionScheme find_partition_scheme(PlannerInfo *root,
84 : : Relation relation);
85 : : static void set_baserel_partition_key_exprs(Relation relation,
86 : : RelOptInfo *rel);
87 : : static void set_baserel_partition_constraint(Relation relation,
88 : : RelOptInfo *rel);
89 : :
90 : :
91 : : /*
92 : : * get_relation_info -
93 : : * Retrieves catalog information for a given relation.
94 : : *
95 : : * Given the Oid of the relation, return the following info into fields
96 : : * of the RelOptInfo struct:
97 : : *
98 : : * min_attr lowest valid AttrNumber
99 : : * max_attr highest valid AttrNumber
100 : : * indexlist list of IndexOptInfos for relation's indexes
101 : : * statlist list of StatisticExtInfo for relation's statistic objects
102 : : * serverid if it's a foreign table, the server OID
103 : : * fdwroutine if it's a foreign table, the FDW function pointers
104 : : * pages number of pages
105 : : * tuples number of tuples
106 : : * rel_parallel_workers user-defined number of parallel workers
107 : : *
108 : : * Also, add information about the relation's foreign keys to root->fkey_list.
109 : : *
110 : : * Also, initialize the attr_needed[] and attr_widths[] arrays. In most
111 : : * cases these are left as zeroes, but sometimes we need to compute attr
112 : : * widths here, and we may as well cache the results for costsize.c.
113 : : *
114 : : * If inhparent is true, all we need to do is set up the attr arrays:
115 : : * the RelOptInfo actually represents the appendrel formed by an inheritance
116 : : * tree, and so the parent rel's physical size and index information isn't
117 : : * important for it, however, for partitioned tables, we do populate the
118 : : * indexlist as the planner uses unique indexes as unique proofs for certain
119 : : * optimizations.
120 : : */
121 : : void
7306 tgl@sss.pgh.pa.us 122 :CBC 371837 : get_relation_info(PlannerInfo *root, Oid relationObjectId, bool inhparent,
123 : : RelOptInfo *rel)
124 : : {
8625 125 : 371837 : Index varno = rel->relid;
126 : : Relation relation;
127 : : bool hasindex;
8630 128 : 371837 : List *indexinfos = NIL;
129 : :
130 : : /*
131 : : * We need not lock the relation since it was already locked, either by
132 : : * the rewriter or when expand_inherited_rtentry() added it to the query's
133 : : * rangetable.
134 : : */
2799 andres@anarazel.de 135 : 371837 : relation = table_open(relationObjectId, NoLock);
136 : :
137 : : /*
138 : : * Relations without a table AM can be used in a query only if they are of
139 : : * special-cased relkinds. This check prevents us from crashing later if,
140 : : * for example, a view's ON SELECT rule has gone missing. Note that
141 : : * table_open() already rejected indexes and composite types; spell the
142 : : * error the same way it does.
143 : : */
1434 tgl@sss.pgh.pa.us 144 [ + + ]: 371837 : if (!relation->rd_tableam)
145 : : {
146 [ + + ]: 15153 : if (!(relation->rd_rel->relkind == RELKIND_FOREIGN_TABLE ||
147 [ - + ]: 13795 : relation->rd_rel->relkind == RELKIND_PARTITIONED_TABLE))
1434 tgl@sss.pgh.pa.us 148 [ # # ]:UBC 0 : ereport(ERROR,
149 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
150 : : errmsg("cannot open relation \"%s\"",
151 : : RelationGetRelationName(relation)),
152 : : errdetail_relkind_not_supported(relation->rd_rel->relkind)));
153 : : }
154 : :
155 : : /* Temporary and unlogged relations are inaccessible during recovery. */
2008 bruce@momjian.us 156 [ + + - + ]:CBC 371837 : if (!RelationIsPermanent(relation) && RecoveryInProgress())
5584 rhaas@postgresql.org 157 [ # # ]:UBC 0 : ereport(ERROR,
158 : : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
159 : : errmsg("cannot access temporary or unlogged relations during recovery")));
160 : :
8484 tgl@sss.pgh.pa.us 161 :CBC 371837 : rel->min_attr = FirstLowInvalidHeapAttributeNumber + 1;
162 : 371837 : rel->max_attr = RelationGetNumberOfAttributes(relation);
6102 rhaas@postgresql.org 163 : 371837 : rel->reltablespace = RelationGetForm(relation)->reltablespace;
164 : :
7963 tgl@sss.pgh.pa.us 165 [ - + ]: 371837 : Assert(rel->max_attr >= rel->min_attr);
34 michael@paquier.xyz 166 :GNC 371837 : rel->attr_needed = palloc0_array(Relids, rel->max_attr - rel->min_attr + 1);
167 : 371837 : rel->attr_widths = palloc0_array(int32, rel->max_attr - rel->min_attr + 1);
168 : :
169 : : /*
170 : : * Record which columns are defined as NOT NULL. We leave this
171 : : * unpopulated for non-partitioned inheritance parent relations as it's
172 : : * ambiguous as to what it means. Some child tables may have a NOT NULL
173 : : * constraint for a column while others may not. We could work harder and
174 : : * build a unioned set of all child relations notnullattnums, but there's
175 : : * currently no need. The RelOptInfo corresponding to the !inh
176 : : * RangeTblEntry does get populated.
177 : : */
891 drowley@postgresql.o 178 [ + + + + ]:CBC 371837 : if (!inhparent || relation->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
425 rguo@postgresql.org 179 : 347310 : rel->notnullattnums = find_relation_notnullatts(root, relationObjectId);
180 : :
181 : : /*
182 : : * Estimate relation size --- unless it's an inheritance parent, in which
183 : : * case the size we want is not the rel's own size but the size of its
184 : : * inheritance tree. That will be computed in set_append_rel_size().
185 : : */
7306 tgl@sss.pgh.pa.us 186 [ + + ]: 371837 : if (!inhparent)
187 : 333541 : estimate_rel_size(relation, rel->attr_widths - rel->min_attr,
5455 188 : 333541 : &rel->pages, &rel->tuples, &rel->allvisfrac);
189 : :
190 : : /* Retrieve the parallel_workers reloption, or -1 if not set. */
3755 191 [ + + ]: 371837 : rel->rel_parallel_workers = RelationGetParallelWorkers(relation, -1);
192 : :
193 : : /*
194 : : * Make list of indexes. Ignore indexes on system catalogs if told to.
195 : : * Don't bother with indexes from traditional inheritance parents. For
196 : : * partitioned tables, we need a list of at least unique indexes as these
197 : : * serve as unique proofs for certain planner optimizations. However,
198 : : * let's not discriminate here and just record all partitioned indexes
199 : : * whether they're unique indexes or not.
200 : : */
1350 drowley@postgresql.o 201 [ + + + + ]: 371837 : if ((inhparent && relation->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
202 [ - + - - ]: 347310 : || (IgnoreSystemIndexes && IsSystemRelation(relation)))
8630 tgl@sss.pgh.pa.us 203 : 24527 : hasindex = false;
204 : : else
205 : 347310 : hasindex = relation->rd_rel->relhasindex;
206 : :
207 [ + + ]: 371837 : if (hasindex)
208 : : {
209 : : List *indexoidlist;
210 : : LOCKMODE lmode;
211 : : ListCell *l;
212 : :
213 : 275814 : indexoidlist = RelationGetIndexList(relation);
214 : :
215 : : /*
216 : : * For each index, we get the same type of lock that the executor will
217 : : * need, and do not release it. This saves a couple of trips to the
218 : : * shared lock manager while not creating any real loss of
219 : : * concurrency, because no schema changes could be happening on the
220 : : * index while we hold lock on the parent rel, and no lock type used
221 : : * for queries blocks any other kind of index operation.
222 : : */
2726 223 : 275814 : lmode = root->simple_rte_array[varno]->rellockmode;
224 : :
8152 neilc@samurai.com 225 [ + + + + : 865950 : foreach(l, indexoidlist)
+ + ]
226 : : {
8148 227 : 590137 : Oid indexoid = lfirst_oid(l);
228 : : Relation indexRelation;
229 : : Form_pg_index index;
264 tgl@sss.pgh.pa.us 230 : 590137 : const IndexAmRoutine *amroutine = NULL;
231 : : IndexOptInfo *info;
232 : : int ncolumns,
233 : : nkeycolumns;
234 : : int i;
235 : :
236 : : /*
237 : : * Extract info from the relation descriptor for the index.
238 : : */
7356 239 : 590137 : indexRelation = index_open(indexoid, lmode);
8516 240 : 590137 : index = indexRelation->rd_index;
241 : :
242 : : /*
243 : : * Ignore invalid indexes, since they can't safely be used for
244 : : * queries. Note that this is OK because the data structure we
245 : : * are constructing is only used by the planner --- the executor
246 : : * still needs to insert into "invalid" indexes, if they're marked
247 : : * indisready.
248 : : */
2824 peter_e@gmx.net 249 [ + + ]: 590137 : if (!index->indisvalid)
250 : : {
7331 tgl@sss.pgh.pa.us 251 : 27 : index_close(indexRelation, NoLock);
252 : 27 : continue;
253 : : }
254 : :
255 : : /*
256 : : * If the index is valid, but cannot yet be used, ignore it; but
257 : : * mark the plan we are generating as transient. See
258 : : * src/backend/access/heap/README.HOT for discussion.
259 : : */
6940 260 [ + + ]: 590110 : if (index->indcheckxmin &&
261 [ + + ]: 253 : !TransactionIdPrecedes(HeapTupleHeaderGetXmin(indexRelation->rd_indextuple->t_data),
262 : : TransactionXmin))
263 : : {
264 : 213 : root->glob->transientPlan = true;
265 : 213 : index_close(indexRelation, NoLock);
266 : 213 : continue;
267 : : }
268 : :
8630 269 : 589897 : info = makeNode(IndexOptInfo);
270 : :
271 : 589897 : info->indexoid = index->indexrelid;
6102 rhaas@postgresql.org 272 : 589897 : info->reltablespace =
273 : 589897 : RelationGetForm(indexRelation)->reltablespace;
7847 tgl@sss.pgh.pa.us 274 : 589897 : info->rel = rel;
8516 275 : 589897 : info->ncolumns = ncolumns = index->indnatts;
3088 teodor@sigaev.ru 276 : 589897 : info->nkeycolumns = nkeycolumns = index->indnkeyatts;
277 : :
284 michael@paquier.xyz 278 : 589897 : info->indexkeys = palloc_array(int, ncolumns);
279 : 589897 : info->indexcollations = palloc_array(Oid, nkeycolumns);
280 : 589897 : info->opfamily = palloc_array(Oid, nkeycolumns);
281 : 589897 : info->opcintype = palloc_array(Oid, nkeycolumns);
282 : 589897 : info->canreturn = palloc_array(bool, ncolumns);
283 : :
8516 tgl@sss.pgh.pa.us 284 [ + + ]: 1684835 : for (i = 0; i < ncolumns; i++)
285 : : {
7845 286 : 1094938 : info->indexkeys[i] = index->indkey.values[i];
3088 teodor@sigaev.ru 287 : 1094938 : info->canreturn[i] = index_can_return(indexRelation, i + 1);
288 : : }
289 : :
290 [ + + ]: 1684540 : for (i = 0; i < nkeycolumns; i++)
291 : : {
7052 tgl@sss.pgh.pa.us 292 : 1094643 : info->opfamily[i] = indexRelation->rd_opfamily[i];
293 : 1094643 : info->opcintype[i] = indexRelation->rd_opcintype[i];
3083 teodor@sigaev.ru 294 : 1094643 : info->indexcollations[i] = indexRelation->rd_indcollation[i];
295 : : }
296 : :
8630 tgl@sss.pgh.pa.us 297 : 589897 : info->relam = indexRelation->rd_rel->relam;
298 : :
299 : : /*
300 : : * We don't have an AM for partitioned indexes, so we'll just
301 : : * NULLify the AM related fields for those.
302 : : */
1350 drowley@postgresql.o 303 [ + + ]: 589897 : if (indexRelation->rd_rel->relkind != RELKIND_PARTITIONED_INDEX)
304 : : {
305 : : /* We copy just the fields we need, not all of rd_indam */
306 : 585268 : amroutine = indexRelation->rd_indam;
307 : 585268 : info->amcanorderbyop = amroutine->amcanorderbyop;
308 : 585268 : info->amoptionalkey = amroutine->amoptionalkey;
309 : 585268 : info->amsearcharray = amroutine->amsearcharray;
310 : 585268 : info->amsearchnulls = amroutine->amsearchnulls;
311 : 585268 : info->amcanparallel = amroutine->amcanparallel;
312 : 585268 : info->amhasgettuple = (amroutine->amgettuple != NULL);
313 [ + - ]: 1170536 : info->amhasgetbitmap = amroutine->amgetbitmap != NULL &&
554 melanieplageman@gmai 314 [ + - ]: 585268 : relation->rd_tableam->scan_bitmap_next_tuple != NULL;
1350 drowley@postgresql.o 315 [ + + ]: 1153071 : info->amcanmarkpos = (amroutine->ammarkpos != NULL &&
316 [ + - ]: 567803 : amroutine->amrestrpos != NULL);
317 : 585268 : info->amcostestimate = amroutine->amcostestimate;
318 [ - + ]: 585268 : Assert(info->amcostestimate != NULL);
319 : :
320 : : /* Fetch index opclass options */
321 : 585268 : info->opclassoptions = RelationGetIndexAttOptions(indexRelation, true);
322 : :
323 : : /*
324 : : * Fetch the ordering information for the index, if any.
325 : : */
326 [ + + ]: 585268 : if (info->relam == BTREE_AM_OID)
327 : : {
328 : : /*
329 : : * If it's a btree index, we can use its opfamily OIDs
330 : : * directly as the sort ordering opfamily OIDs.
331 : : */
332 [ - + ]: 567803 : Assert(amroutine->amcanorder);
333 : :
334 : 567803 : info->sortopfamily = info->opfamily;
284 michael@paquier.xyz 335 : 567803 : info->reverse_sort = palloc_array(bool, nkeycolumns);
336 : 567803 : info->nulls_first = palloc_array(bool, nkeycolumns);
337 : :
1350 drowley@postgresql.o 338 [ + + ]: 1423308 : for (i = 0; i < nkeycolumns; i++)
339 : : {
340 : 855505 : int16 opt = indexRelation->rd_indoption[i];
341 : :
342 : 855505 : info->reverse_sort[i] = (opt & INDOPTION_DESC) != 0;
343 : 855505 : info->nulls_first[i] = (opt & INDOPTION_NULLS_FIRST) != 0;
344 : : }
345 : : }
346 [ - + ]: 17465 : else if (amroutine->amcanorder)
347 : : {
348 : : /*
349 : : * Otherwise, identify the corresponding btree opfamilies
350 : : * by trying to map this index's "<" operators into btree.
351 : : * Since "<" uniquely defines the behavior of a sort
352 : : * order, this is a sufficient test.
353 : : *
354 : : * XXX This method is rather slow and complicated. It'd
355 : : * be better to have a way to explicitly declare the
356 : : * corresponding btree opfamily for each opfamily of the
357 : : * other index type.
358 : : */
284 michael@paquier.xyz 359 :UBC 0 : info->sortopfamily = palloc_array(Oid, nkeycolumns);
360 : 0 : info->reverse_sort = palloc_array(bool, nkeycolumns);
361 : 0 : info->nulls_first = palloc_array(bool, nkeycolumns);
362 : :
1350 drowley@postgresql.o 363 [ # # ]: 0 : for (i = 0; i < nkeycolumns; i++)
364 : : {
365 : 0 : int16 opt = indexRelation->rd_indoption[i];
366 : : Oid ltopr;
367 : : Oid opfamily;
368 : : Oid opcintype;
369 : : CompareType cmptype;
370 : :
371 : 0 : info->reverse_sort[i] = (opt & INDOPTION_DESC) != 0;
372 : 0 : info->nulls_first[i] = (opt & INDOPTION_NULLS_FIRST) != 0;
373 : :
532 peter@eisentraut.org 374 : 0 : ltopr = get_opfamily_member_for_cmptype(info->opfamily[i],
375 : 0 : info->opcintype[i],
376 : 0 : info->opcintype[i],
377 : : COMPARE_LT);
1350 drowley@postgresql.o 378 [ # # # # ]: 0 : if (OidIsValid(ltopr) &&
379 : 0 : get_ordering_op_properties(ltopr,
380 : : &opfamily,
381 : : &opcintype,
532 peter@eisentraut.org 382 : 0 : &cmptype) &&
383 [ # # ]: 0 : opcintype == info->opcintype[i] &&
384 [ # # ]: 0 : cmptype == COMPARE_LT)
385 : : {
386 : : /* Successful mapping */
387 : 0 : info->sortopfamily[i] = opfamily;
388 : : }
389 : : else
390 : : {
391 : : /* Fail ... quietly treat index as unordered */
1350 drowley@postgresql.o 392 : 0 : info->sortopfamily = NULL;
393 : 0 : info->reverse_sort = NULL;
394 : 0 : info->nulls_first = NULL;
395 : 0 : break;
396 : : }
397 : : }
398 : : }
399 : : else
400 : : {
1350 drowley@postgresql.o 401 :CBC 17465 : info->sortopfamily = NULL;
402 : 17465 : info->reverse_sort = NULL;
403 : 17465 : info->nulls_first = NULL;
404 : : }
405 : : }
406 : : else
407 : : {
408 : 4629 : info->amcanorderbyop = false;
409 : 4629 : info->amoptionalkey = false;
410 : 4629 : info->amsearcharray = false;
411 : 4629 : info->amsearchnulls = false;
412 : 4629 : info->amcanparallel = false;
413 : 4629 : info->amhasgettuple = false;
414 : 4629 : info->amhasgetbitmap = false;
415 : 4629 : info->amcanmarkpos = false;
416 : 4629 : info->amcostestimate = NULL;
417 : :
5774 tgl@sss.pgh.pa.us 418 : 4629 : info->sortopfamily = NULL;
419 : 4629 : info->reverse_sort = NULL;
420 : 4629 : info->nulls_first = NULL;
421 : : }
422 : :
423 : : /*
424 : : * Fetch the index expressions and predicate, if any. We must
425 : : * modify the copies we obtain from the relcache to have the
426 : : * correct varno for the parent relation, so that they match up
427 : : * correctly against qual clauses.
428 : : *
429 : : * After fixing the varnos, we need to run the index expressions
430 : : * and predicate through const-simplification again, using a valid
431 : : * "root". This ensures that NullTest quals for Vars can be
432 : : * properly reduced.
433 : : */
8516 434 : 589897 : info->indexprs = RelationGetIndexExpressions(indexRelation);
435 : 589897 : info->indpred = RelationGetIndexPredicate(indexRelation);
285 rguo@postgresql.org 436 [ + + ]: 589897 : if (info->indexprs)
437 : : {
438 [ + + ]: 2699 : if (varno != 1)
439 : 1785 : ChangeVarNodes((Node *) info->indexprs, 1, varno, 0);
440 : :
441 : 2699 : info->indexprs = (List *)
442 : 2699 : eval_const_expressions(root, (Node *) info->indexprs);
443 : : }
444 [ + + ]: 589897 : if (info->indpred)
445 : : {
446 [ + + ]: 845 : if (varno != 1)
447 : 105 : ChangeVarNodes((Node *) info->indpred, 1, varno, 0);
448 : :
449 : 845 : info->indpred = (List *)
450 : 845 : eval_const_expressions(root,
451 : 845 : (Node *) make_ands_explicit(info->indpred));
452 : 845 : info->indpred = make_ands_implicit((Expr *) info->indpred);
453 : : }
454 : :
455 : : /* Build targetlist using the completed indexprs data */
5458 tgl@sss.pgh.pa.us 456 : 589897 : info->indextlist = build_index_tlist(root, info, relation);
457 : :
3378 458 : 589897 : info->indrestrictinfo = NIL; /* set later, in indxpath.c */
459 : 589897 : info->predOK = false; /* set later, in indxpath.c */
8516 460 : 589897 : info->unique = index->indisunique;
647 drowley@postgresql.o 461 : 589897 : info->nullsnotdistinct = index->indnullsnotdistinct;
5446 tgl@sss.pgh.pa.us 462 : 589897 : info->immediate = index->indimmediate;
5695 463 : 589897 : info->hypothetical = false;
464 : :
465 : : /*
466 : : * Estimate the index size. If it's not a partial index, we lock
467 : : * the number-of-tuples estimate to equal the parent table; if it
468 : : * is partial then we have to use the same methods as we would for
469 : : * a table, except we can be sure that the index is not larger
470 : : * than the table. We must ignore partitioned indexes here as
471 : : * there are not physical indexes.
472 : : */
1350 drowley@postgresql.o 473 [ + + ]: 589897 : if (indexRelation->rd_rel->relkind != RELKIND_PARTITIONED_INDEX)
474 : : {
475 [ + + ]: 585268 : if (info->indpred == NIL)
476 : : {
477 : 584443 : info->pages = RelationGetNumberOfBlocks(indexRelation);
7963 tgl@sss.pgh.pa.us 478 : 584443 : info->tuples = rel->tuples;
479 : : }
480 : : else
481 : : {
482 : : double allvisfrac; /* dummy */
483 : :
1350 drowley@postgresql.o 484 : 825 : estimate_rel_size(indexRelation, NULL,
485 : 825 : &info->pages, &info->tuples, &allvisfrac);
486 [ + + ]: 825 : if (info->tuples > rel->tuples)
487 : 15 : info->tuples = rel->tuples;
488 : : }
489 : :
490 : : /*
491 : : * Get tree height while we have the index open
492 : : */
740 peter@eisentraut.org 493 [ + + ]: 585268 : if (amroutine->amgettreeheight)
494 : : {
495 : 567803 : info->tree_height = amroutine->amgettreeheight(indexRelation);
496 : : }
497 : : else
498 : : {
499 : : /* For other index types, just set it to "unknown" for now */
1350 drowley@postgresql.o 500 : 17465 : info->tree_height = -1;
501 : : }
502 : : }
503 : : else
504 : : {
505 : : /* Zero these out for partitioned indexes */
506 : 4629 : info->pages = 0;
507 : 4629 : info->tuples = 0.0;
5000 tgl@sss.pgh.pa.us 508 : 4629 : info->tree_height = -1;
509 : : }
510 : :
7356 511 : 589896 : index_close(indexRelation, NoLock);
512 : :
513 : : /*
514 : : * We've historically used lcons() here. It'd make more sense to
515 : : * use lappend(), but that causes the planner to change behavior
516 : : * in cases where two indexes seem equally attractive. For now,
517 : : * stick with lcons() --- few tables should have so many indexes
518 : : * that the O(N^2) behavior of lcons() is really a problem.
519 : : */
8630 520 : 589896 : indexinfos = lcons(info, indexinfos);
521 : : }
522 : :
8148 neilc@samurai.com 523 : 275813 : list_free(indexoidlist);
524 : : }
525 : :
8630 tgl@sss.pgh.pa.us 526 : 371836 : rel->indexlist = indexinfos;
527 : :
385 rguo@postgresql.org 528 : 371836 : rel->statlist = get_relation_statistics(root, rel, relation);
529 : :
530 : : /* Grab foreign-table info using the relcache, while we have it */
4946 tgl@sss.pgh.pa.us 531 [ + + ]: 371836 : if (relation->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
532 : : {
533 : : /* Check if the access to foreign tables is restricted */
776 msawada@postgresql.o 534 [ + + ]: 1358 : if (unlikely((restrict_nonsystem_relation_kind & RESTRICT_RELKIND_FOREIGN_TABLE) != 0))
535 : : {
536 : : /* there must not be built-in foreign tables */
537 [ - + ]: 2 : Assert(RelationGetRelid(relation) >= FirstNormalObjectId);
538 : :
539 [ + - ]: 2 : ereport(ERROR,
540 : : (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
541 : : errmsg("access to non-system foreign table is restricted")));
542 : : }
543 : :
4151 tgl@sss.pgh.pa.us 544 : 1356 : rel->serverid = GetForeignServerIdByRelId(RelationGetRelid(relation));
4946 545 : 1356 : rel->fdwroutine = GetFdwRoutineForRelation(relation, true);
546 : : }
547 : : else
548 : : {
4151 549 : 370478 : rel->serverid = InvalidOid;
4946 550 : 370478 : rel->fdwroutine = NULL;
551 : : }
552 : :
553 : : /* Collect info about relation's foreign keys, if relevant */
3609 554 : 371825 : get_relation_foreign_keys(root, rel, relation, inhparent);
555 : :
556 : : /* Collect info about functions implemented by the rel's table AM. */
2031 drowley@postgresql.o 557 [ + + ]: 371825 : if (relation->rd_tableam &&
558 [ + - ]: 356683 : relation->rd_tableam->scan_set_tidrange != NULL &&
559 [ + - ]: 356683 : relation->rd_tableam->scan_getnextslot_tidrange != NULL)
560 : 356683 : rel->amflags |= AMFLAG_HAS_TID_RANGE;
561 : :
562 : : /*
563 : : * Collect info about relation's partitioning scheme, if any. Only
564 : : * inheritance parents may be partitioned.
565 : : */
3287 rhaas@postgresql.org 566 [ + + + + ]: 371825 : if (inhparent && relation->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
567 : 13769 : set_relation_partition_info(root, rel, relation);
568 : :
2799 andres@anarazel.de 569 : 371825 : table_close(relation, NoLock);
11030 scrappy@hub.org 570 : 371825 : }
571 : :
572 : : /*
573 : : * get_relation_foreign_keys -
574 : : * Retrieves foreign key information for a given relation.
575 : : *
576 : : * ForeignKeyOptInfos for relevant foreign keys are created and added to
577 : : * root->fkey_list. We do this now while we have the relcache entry open.
578 : : * We could sometimes avoid making useless ForeignKeyOptInfos if we waited
579 : : * until all RelOptInfos have been built, but the cost of re-opening the
580 : : * relcache entries would probably exceed any savings.
581 : : */
582 : : static void
3746 tgl@sss.pgh.pa.us 583 : 371825 : get_relation_foreign_keys(PlannerInfo *root, RelOptInfo *rel,
584 : : Relation relation, bool inhparent)
585 : : {
586 : 371825 : List *rtable = root->parse->rtable;
587 : : List *cachedfkeys;
588 : : ListCell *lc;
589 : :
590 : : /*
591 : : * If it's not a baserel, we don't care about its FKs. Also, if the query
592 : : * references only a single relation, we can skip the lookup since no FKs
593 : : * could satisfy the requirements below.
594 : : */
595 [ + + + + ]: 707850 : if (rel->reloptkind != RELOPT_BASEREL ||
596 : 336025 : list_length(rtable) < 2)
597 : 176071 : return;
598 : :
599 : : /*
600 : : * If it's the parent of an inheritance tree, ignore its FKs. We could
601 : : * make useful FK-based deductions if we found that all members of the
602 : : * inheritance tree have equivalent FK constraints, but detecting that
603 : : * would require code that hasn't been written.
604 : : */
3609 605 [ + + ]: 195754 : if (inhparent)
606 : 5045 : return;
607 : :
608 : : /*
609 : : * Extract data about relation's FKs from the relcache. Note that this
610 : : * list belongs to the relcache and might disappear in a cache flush, so
611 : : * we must not do any further catalog access within this function.
612 : : */
3746 613 : 190709 : cachedfkeys = RelationGetFKeyList(relation);
614 : :
615 : : /*
616 : : * Figure out which FKs are of interest for this query, and create
617 : : * ForeignKeyOptInfos for them. We want only FKs that reference some
618 : : * other RTE of the current query. In queries containing self-joins,
619 : : * there might be more than one other RTE for a referenced table, and we
620 : : * should make a ForeignKeyOptInfo for each occurrence.
621 : : *
622 : : * Ideally, we would ignore RTEs that correspond to non-baserels, but it's
623 : : * too hard to identify those here, so we might end up making some useless
624 : : * ForeignKeyOptInfos. If so, match_foreign_keys_to_quals() will remove
625 : : * them again.
626 : : */
627 [ + + + + : 192990 : foreach(lc, cachedfkeys)
+ + ]
628 : : {
629 : 2281 : ForeignKeyCacheInfo *cachedfk = (ForeignKeyCacheInfo *) lfirst(lc);
630 : : Index rti;
631 : : ListCell *lc2;
632 : :
633 : : /* conrelid should always be that of the table we're considering */
634 [ - + ]: 2281 : Assert(cachedfk->conrelid == RelationGetRelid(relation));
635 : :
636 : : /* skip constraints currently not enforced */
536 peter@eisentraut.org 637 [ + + ]: 2281 : if (!cachedfk->conenforced)
638 : 27 : continue;
639 : :
640 : : /* Scan to find other RTEs matching confrelid */
3746 tgl@sss.pgh.pa.us 641 : 2254 : rti = 0;
642 [ + - + + : 10065 : foreach(lc2, rtable)
+ + ]
643 : : {
644 : 7811 : RangeTblEntry *rte = (RangeTblEntry *) lfirst(lc2);
645 : : ForeignKeyOptInfo *info;
646 : :
647 : 7811 : rti++;
648 : : /* Ignore if not the correct table */
649 [ + + ]: 7811 : if (rte->rtekind != RTE_RELATION ||
650 [ + + ]: 4865 : rte->relid != cachedfk->confrelid)
651 : 5925 : continue;
652 : : /* Ignore if it's an inheritance parent; doesn't really match */
3609 653 [ + + ]: 1886 : if (rte->inh)
654 : 237 : continue;
655 : : /* Ignore self-referential FKs; we only care about joins */
3746 656 [ + + ]: 1649 : if (rti == rel->relid)
657 : 110 : continue;
658 : :
659 : : /* OK, let's make an entry */
660 : 1539 : info = makeNode(ForeignKeyOptInfo);
661 : 1539 : info->con_relid = rel->relid;
662 : 1539 : info->ref_relid = rti;
663 : 1539 : info->nkeys = cachedfk->nkeys;
664 : 1539 : memcpy(info->conkey, cachedfk->conkey, sizeof(info->conkey));
665 : 1539 : memcpy(info->confkey, cachedfk->confkey, sizeof(info->confkey));
666 : 1539 : memcpy(info->conpfeqop, cachedfk->conpfeqop, sizeof(info->conpfeqop));
667 : : /* zero out fields to be filled by match_foreign_keys_to_quals */
668 : 1539 : info->nmatched_ec = 0;
2153 669 : 1539 : info->nconst_ec = 0;
3746 670 : 1539 : info->nmatched_rcols = 0;
671 : 1539 : info->nmatched_ri = 0;
672 : 1539 : memset(info->eclass, 0, sizeof(info->eclass));
2153 673 : 1539 : memset(info->fk_eclass_member, 0, sizeof(info->fk_eclass_member));
3746 674 : 1539 : memset(info->rinfos, 0, sizeof(info->rinfos));
675 : :
676 : 1539 : root->fkey_list = lappend(root->fkey_list, info);
677 : : }
678 : : }
679 : : }
680 : :
681 : : /*
682 : : * get_relation_notnullatts -
683 : : * Retrieves column not-null constraint information for a given relation.
684 : : *
685 : : * We do this while we have the relcache entry open, and store the column
686 : : * not-null constraint information in a hash table based on the relation OID.
687 : : */
688 : : void
425 rguo@postgresql.org 689 : 389452 : get_relation_notnullatts(PlannerInfo *root, Relation relation)
690 : : {
691 : 389452 : Oid relid = RelationGetRelid(relation);
692 : : NotnullHashEntry *hentry;
693 : : bool found;
373 694 : 389452 : Bitmapset *notnullattnums = NULL;
695 : :
696 : : /* bail out if the relation has no not-null constraints */
425 697 [ + + ]: 389452 : if (relation->rd_att->constr == NULL ||
698 [ + + ]: 251660 : !relation->rd_att->constr->has_not_null)
699 : 176896 : return;
700 : :
701 : : /* create the hash table if it hasn't been created yet */
702 [ + + ]: 247083 : if (root->glob->rel_notnullatts_hash == NULL)
703 : : {
704 : : HTAB *hashtab;
705 : : HASHCTL hash_ctl;
706 : :
707 : 118718 : hash_ctl.keysize = sizeof(Oid);
708 : 118718 : hash_ctl.entrysize = sizeof(NotnullHashEntry);
709 : 118718 : hash_ctl.hcxt = CurrentMemoryContext;
710 : :
711 : 118718 : hashtab = hash_create("Relation NOT NULL attnums",
712 : : 64L, /* arbitrary initial size */
713 : : &hash_ctl,
714 : : HASH_ELEM | HASH_BLOBS | HASH_CONTEXT);
715 : :
716 : 118718 : root->glob->rel_notnullatts_hash = hashtab;
717 : : }
718 : :
719 : : /*
720 : : * Create a hash entry for this relation OID, if we don't have one
721 : : * already.
722 : : */
723 : 247083 : hentry = (NotnullHashEntry *) hash_search(root->glob->rel_notnullatts_hash,
724 : : &relid,
725 : : HASH_ENTER,
726 : : &found);
727 : :
728 : : /* bail out if a hash entry already exists for this relation OID */
729 [ + + ]: 247083 : if (found)
730 : 34527 : return;
731 : :
732 : : /* collect the column not-null constraint information for this relation */
733 [ + + ]: 3138483 : for (int i = 0; i < relation->rd_att->natts; i++)
734 : : {
735 : 2925927 : CompactAttribute *attr = TupleDescCompactAttr(relation->rd_att, i);
736 : :
737 [ - + ]: 2925927 : Assert(attr->attnullability != ATTNULLABLE_UNKNOWN);
738 : :
739 [ + + ]: 2925927 : if (attr->attnullability == ATTNULLABLE_VALID)
740 : : {
741 : 2466339 : notnullattnums = bms_add_member(notnullattnums, i + 1);
742 : :
743 : : /*
744 : : * Per RemoveAttributeById(), dropped columns will have their
745 : : * attnotnull unset, so we needn't check for dropped columns in
746 : : * the above condition.
747 : : */
748 [ - + ]: 2466339 : Assert(!attr->attisdropped);
749 : : }
750 : : }
751 : :
752 : : /* ... and initialize the new hash entry */
753 : 212556 : hentry->notnullattnums = notnullattnums;
754 : : }
755 : :
756 : : /*
757 : : * find_relation_notnullatts -
758 : : * Searches the hash table and returns the column not-null constraint
759 : : * information for a given relation.
760 : : */
761 : : Bitmapset *
762 : 361078 : find_relation_notnullatts(PlannerInfo *root, Oid relid)
763 : : {
764 : : NotnullHashEntry *hentry;
765 : : bool found;
766 : :
767 [ + + ]: 361078 : if (root->glob->rel_notnullatts_hash == NULL)
768 : 102255 : return NULL;
769 : :
770 : 258823 : hentry = (NotnullHashEntry *) hash_search(root->glob->rel_notnullatts_hash,
771 : : &relid,
772 : : HASH_FIND,
773 : : &found);
774 [ + + ]: 258823 : if (!found)
775 : 3915 : return NULL;
776 : :
777 : 254908 : return hentry->notnullattnums;
778 : : }
779 : :
780 : : /*
781 : : * infer_arbiter_indexes -
782 : : * Determine the unique indexes used to arbitrate speculative insertion.
783 : : *
784 : : * Uses user-supplied inference clause expressions and predicate to match a
785 : : * unique index from those defined and ready on the heap relation (target).
786 : : * An exact match is required on columns/expressions (although they can appear
787 : : * in any order). However, the predicate given by the user need only restrict
788 : : * insertion to a subset of some part of the table covered by some particular
789 : : * unique index (in particular, a partial unique index) in order to be
790 : : * inferred.
791 : : *
792 : : * The implementation does not consider which B-Tree operator class any
793 : : * particular available unique index attribute uses, unless one was specified
794 : : * in the inference specification. The same is true of collations. In
795 : : * particular, there is no system dependency on the default operator class for
796 : : * the purposes of inference. If no opclass (or collation) is specified, then
797 : : * all matching indexes (that may or may not match the default in terms of
798 : : * each attribute opclass/collation) are used for inference.
799 : : *
800 : : * If a named constraint was specified, none of that matching happens: the
801 : : * constraint's index is used, along with any index that is an exact
802 : : * structural equivalent of it. Such equivalents exist transiently while
803 : : * REINDEX CONCURRENTLY processes the constraint's index, and they must all
804 : : * arbitrate together so that every concurrent session resolves conflicts
805 : : * against the same set of indexes.
806 : : */
807 : : List *
4153 andres@anarazel.de 808 : 1880 : infer_arbiter_indexes(PlannerInfo *root)
809 : : {
810 : 1880 : OnConflictExpr *onconflict = root->parse->onConflict;
811 : :
812 : : /* Iteration state */
813 : : Index varno;
814 : : RangeTblEntry *rte;
815 : : Relation relation,
2 alvherre@kurilemu.de 816 : 1880 : indexRelFromConstraint = NULL;
4153 andres@anarazel.de 817 : 1880 : Oid indexOidFromConstraint = InvalidOid;
818 : : List *indexList;
293 alvherre@kurilemu.de 819 : 1880 : List *indexRelList = NIL;
820 : :
821 : : /* Normalized inference attributes and inference expressions: */
4153 andres@anarazel.de 822 : 1880 : Bitmapset *inferAttrs = NULL;
823 : 1880 : List *inferElems = NIL;
824 : :
825 : : /* Results */
4142 826 : 1880 : List *results = NIL;
300 alvherre@kurilemu.de 827 : 1880 : bool foundValid = false;
828 : :
829 : : /*
830 : : * Quickly return NIL for ON CONFLICT DO NOTHING without an inference
831 : : * specification or named constraint. ON CONFLICT DO SELECT/UPDATE
832 : : * statements must always provide one or the other (but parser ought to
833 : : * have caught that already).
834 : : */
4153 andres@anarazel.de 835 [ + + ]: 1880 : if (onconflict->arbiterElems == NIL &&
836 [ + + ]: 385 : onconflict->constraint == InvalidOid)
837 : 163 : return NIL;
838 : :
839 : : /*
840 : : * We need not lock the relation since it was already locked, either by
841 : : * the rewriter or when expand_inherited_rtentry() added it to the query's
842 : : * rangetable.
843 : : */
831 tgl@sss.pgh.pa.us 844 : 1717 : varno = root->parse->resultRelation;
845 : 1717 : rte = rt_fetch(varno, root->parse->rtable);
846 : :
2726 847 : 1717 : relation = table_open(rte->relid, NoLock);
848 : :
849 : : /*
850 : : * Build normalized/BMS representation of plain indexed attributes, as
851 : : * well as a separate list of expression items. This simplifies matching
852 : : * the cataloged definition of indexes.
853 : : */
293 alvherre@kurilemu.de 854 [ + + + + : 5267 : foreach_ptr(InferenceElem, elem, onconflict->arbiterElems)
+ + ]
855 : : {
856 : : Var *var;
857 : : int attno;
858 : :
859 : : /* we cannot also have a constraint name, per grammar */
860 [ - + ]: 1833 : Assert(!OidIsValid(onconflict->constraint));
861 : :
4153 andres@anarazel.de 862 [ + + ]: 1833 : if (!IsA(elem->expr, Var))
863 : : {
864 : : /* If not a plain Var, just shove it in inferElems for now */
865 : 130 : inferElems = lappend(inferElems, elem->expr);
866 : 130 : continue;
867 : : }
868 : :
869 : 1703 : var = (Var *) elem->expr;
870 : 1703 : attno = var->varattno;
871 : :
3784 tgl@sss.pgh.pa.us 872 [ - + ]: 1703 : if (attno == 0)
4153 andres@anarazel.de 873 [ # # ]:UBC 0 : ereport(ERROR,
874 : : (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
875 : : errmsg("whole row unique index inference specifications are not supported")));
876 : :
3784 tgl@sss.pgh.pa.us 877 :CBC 1703 : inferAttrs = bms_add_member(inferAttrs,
878 : : attno - FirstLowInvalidHeapAttributeNumber);
879 : : }
880 : :
881 : : /*
882 : : * Next, open all the indexes. We need this list for two things: first,
883 : : * if an ON CONSTRAINT clause was given, and that constraint's index is
884 : : * undergoing REINDEX CONCURRENTLY, then we need to consider all matches
885 : : * for that index. Second, if an attribute list was specified in the ON
886 : : * CONFLICT clause, we use the list to find the indexes whose attributes
887 : : * match that list.
888 : : */
293 alvherre@kurilemu.de 889 : 1717 : indexList = RelationGetIndexList(relation);
890 [ + + + + : 5710 : foreach_oid(indexoid, indexList)
+ + ]
891 : : {
892 : : Relation idxRel;
893 : :
894 : : /* obtain the same lock type that the executor will ultimately use */
895 : 2276 : idxRel = index_open(indexoid, rte->rellockmode);
896 : 2276 : indexRelList = lappend(indexRelList, idxRel);
897 : : }
898 : :
899 : : /*
900 : : * If a constraint was named in the command, look up its index. We don't
901 : : * return it immediately because we need some additional sanity checks,
902 : : * and also because we need to include other indexes as arbiters to
903 : : * account for REINDEX CONCURRENTLY processing it.
904 : : */
4153 andres@anarazel.de 905 [ + + ]: 1717 : if (onconflict->constraint != InvalidOid)
906 : : {
907 : : /* we cannot also have an explicit list of elements, per grammar */
293 alvherre@kurilemu.de 908 [ - + ]: 222 : Assert(onconflict->arbiterElems == NIL);
909 : :
910 : 222 : indexOidFromConstraint = get_constraint_index(onconflict->constraint);
4153 andres@anarazel.de 911 [ - + ]: 222 : if (indexOidFromConstraint == InvalidOid)
4153 andres@anarazel.de 912 [ # # ]:UBC 0 : ereport(ERROR,
913 : : (errcode(ERRCODE_WRONG_OBJECT_TYPE),
914 : : errmsg("constraint in ON CONFLICT clause has no associated index")));
915 : :
916 : : /*
917 : : * Find that index in the list, so that candidate indexes can be
918 : : * compared against it below.
919 : : */
293 alvherre@kurilemu.de 920 [ + - + - :CBC 533 : foreach_ptr(RelationData, idxRel, indexRelList)
+ + ]
921 : : {
2 922 [ + + ]: 311 : if (indexOidFromConstraint == RelationGetRelid(idxRel))
923 : : {
924 [ - + ]: 222 : Assert(idxRel->rd_index->indisready);
925 : 222 : indexRelFromConstraint = idxRel;
293 926 : 222 : break;
927 : : }
928 : : }
2 929 [ - + ]: 222 : if (indexRelFromConstraint == NULL)
2 alvherre@kurilemu.de 930 [ # # ]:UBC 0 : elog(ERROR, "could not find index %u of ON CONFLICT constraint",
931 : : indexOidFromConstraint);
932 : : }
933 : :
934 : : /*
935 : : * Using that representation, iterate through the list of indexes on the
936 : : * target relation to find matches.
937 : : */
293 alvherre@kurilemu.de 938 [ + + + + :CBC 5598 : foreach_ptr(RelationData, idxRel, indexRelList)
+ + ]
939 : : {
940 : : Form_pg_index idxForm;
941 : : Bitmapset *indexedAttrs;
942 : : List *idxExprs;
943 : : List *predExprs;
944 : : AttrNumber natt;
945 : : bool match;
946 : :
947 : : /*
948 : : * Extract info from the relation descriptor for the index.
949 : : *
950 : : * Let executor complain about !indimmediate case directly, because
951 : : * enforcement needs to occur there anyway when an inference clause is
952 : : * omitted.
953 : : */
4153 andres@anarazel.de 954 : 2276 : idxForm = idxRel->rd_index;
955 : :
956 : : /*
957 : : * Ignore indexes that aren't indisready, because we cannot trust
958 : : * their catalog structure yet. However, if any indexes are marked
959 : : * indisready but not yet indisvalid, we still consider them, because
960 : : * they might turn valid while we're running. Doing it this way
961 : : * allows a concurrent transaction with a slightly later catalog
962 : : * snapshot infer the same set of indexes, which is critical to
963 : : * prevent spurious 'duplicate key' errors.
964 : : *
965 : : * However, another critical aspect is that a unique index that isn't
966 : : * yet marked indisvalid=true might not be complete yet, meaning it
967 : : * wouldn't detect possible duplicate rows. In order to prevent false
968 : : * negatives, we require that we include in the set of inferred
969 : : * indexes at least one index that is marked valid.
970 : : */
300 alvherre@kurilemu.de 971 [ - + ]: 2276 : if (!idxForm->indisready)
293 alvherre@kurilemu.de 972 :UBC 0 : continue;
973 : :
974 : : /*
975 : : * Ignore invalid indexes for partitioned tables. It's possible that
976 : : * some partitions don't have the index (yet), and then we would not
977 : : * find a match during ExecInitPartitionInfo.
978 : : */
283 alvherre@kurilemu.de 979 [ + + ]:CBC 2276 : if (relation->rd_rel->relkind == RELKIND_PARTITIONED_TABLE &&
980 [ + + ]: 224 : !idxForm->indisvalid)
981 : 9 : continue;
982 : :
983 : : /*
984 : : * Note that we do not perform a check against indcheckxmin (like e.g.
985 : : * get_relation_info()) here to eliminate candidates, because
986 : : * uniqueness checking only cares about the most recently committed
987 : : * tuple versions.
988 : : */
989 : :
990 : : /*
991 : : * Look for match for "ON constraint_name" variant, which may not be a
992 : : * unique constraint. This can only be a constraint name.
993 : : */
4153 andres@anarazel.de 994 [ + + ]: 2267 : if (indexOidFromConstraint == idxForm->indexrelid)
995 : : {
996 : : /*
997 : : * ON CONFLICT DO UPDATE and ON CONFLICT DO SELECT are not
998 : : * supported with exclusion constraints.
999 : : */
220 dean.a.rasheed@gmail 1000 [ + + ]: 222 : if (idxForm->indisexclusion &&
1001 [ + + ]: 131 : (onconflict->action == ONCONFLICT_UPDATE ||
1002 [ + + ]: 79 : onconflict->action == ONCONFLICT_SELECT))
4153 andres@anarazel.de 1003 [ + - + + ]: 56 : ereport(ERROR,
1004 : : errcode(ERRCODE_WRONG_OBJECT_TYPE),
1005 : : /* translator: %s is an ON CONFLICT clause */
1006 : : errmsg("%s not supported with exclusion constraints",
1007 : : onconflict->action == ONCONFLICT_UPDATE ?
1008 : : "ON CONFLICT DO UPDATE" : "ON CONFLICT DO SELECT"));
1009 : :
1010 : : /* Consider this one a match already */
4142 1011 : 166 : results = lappend_oid(results, idxForm->indexrelid);
300 alvherre@kurilemu.de 1012 : 166 : foundValid |= idxForm->indisvalid;
293 1013 : 166 : continue;
1014 : : }
4153 andres@anarazel.de 1015 [ + + ]: 2045 : else if (indexOidFromConstraint != InvalidOid)
1016 : : {
1017 : : /*
1018 : : * When a constraint is named, the only other index that may
1019 : : * arbitrate is an exact structural equivalents of its index,
1020 : : * which exists while REINDEX CONCURRENTLY is processing it.
1021 : : */
2 alvherre@kurilemu.de 1022 [ + + ]: 191 : if (IsIndexCompatibleAsArbiter(indexRelFromConstraint, idxRel))
1023 : : {
1024 : 6 : results = lappend_oid(results, idxForm->indexrelid);
1025 : 6 : foundValid |= idxForm->indisvalid;
1026 : : }
1027 : 191 : continue;
1028 : : }
1029 : : else
1030 : : {
1031 : : /*
1032 : : * Only considering conventional inference at this point (not
1033 : : * named constraints), so index under consideration can be
1034 : : * immediately skipped if it's not unique.
1035 : : */
293 1036 [ + + ]: 1854 : if (!idxForm->indisunique)
1037 : 2 : continue;
1038 : : }
1039 : :
1040 : : /*
1041 : : * So-called unique constraints with WITHOUT OVERLAPS are really
1042 : : * exclusion constraints, so skip those too.
1043 : : */
733 peter@eisentraut.org 1044 [ + + ]: 1852 : if (idxForm->indisexclusion)
293 alvherre@kurilemu.de 1045 : 96 : continue;
1046 : :
1047 : : /* Build BMS representation of plain (non expression) index attrs */
3784 tgl@sss.pgh.pa.us 1048 : 1756 : indexedAttrs = NULL;
3088 teodor@sigaev.ru 1049 [ + + ]: 3948 : for (natt = 0; natt < idxForm->indnkeyatts; natt++)
1050 : : {
4153 andres@anarazel.de 1051 : 2192 : int attno = idxRel->rd_index->indkey.values[natt];
1052 : :
1053 [ + + ]: 2192 : if (attno != 0)
3784 tgl@sss.pgh.pa.us 1054 : 1957 : indexedAttrs = bms_add_member(indexedAttrs,
1055 : : attno - FirstLowInvalidHeapAttributeNumber);
1056 : : }
1057 : :
1058 : : /* Non-expression attributes (if any) must match */
4153 andres@anarazel.de 1059 [ + + ]: 1756 : if (!bms_equal(indexedAttrs, inferAttrs))
293 alvherre@kurilemu.de 1060 : 318 : continue;
1061 : :
1062 : : /* Expression attributes (if any) must match */
4153 andres@anarazel.de 1063 : 1438 : idxExprs = RelationGetIndexExpressions(idxRel);
285 rguo@postgresql.org 1064 [ + + ]: 1438 : if (idxExprs)
1065 : : {
1066 [ + + ]: 130 : if (varno != 1)
1067 : 5 : ChangeVarNodes((Node *) idxExprs, 1, varno, 0);
1068 : :
1069 : 130 : idxExprs = (List *) eval_const_expressions(root, (Node *) idxExprs);
1070 : : }
1071 : :
1072 : : /* Check the arbiterElems against this index. */
293 alvherre@kurilemu.de 1073 : 1438 : match = true;
1074 [ + - + + : 4609 : foreach_ptr(InferenceElem, elem, onconflict->arbiterElems)
+ + ]
1075 : : {
1076 : : /*
1077 : : * Ensure that collation/opclass aspects of inference expression
1078 : : * element match. Even though this loop is primarily concerned
1079 : : * with matching expressions, it is a convenient point to check
1080 : : * this for both expressions and ordinary (non-expression)
1081 : : * attributes appearing as inference elements.
1082 : : */
4074 andres@anarazel.de 1083 [ + + ]: 1770 : if (!infer_collation_opclass_match(elem, idxRel, idxExprs))
1084 : : {
293 alvherre@kurilemu.de 1085 : 29 : match = false;
1086 : 29 : break;
1087 : : }
1088 : :
1089 : : /*
1090 : : * Plain Vars don't factor into count of expression elements, and
1091 : : * the question of whether or not they satisfy the index
1092 : : * definition has already been considered (they must).
1093 : : */
4153 andres@anarazel.de 1094 [ + + ]: 1741 : if (IsA(elem->expr, Var))
1095 : 1605 : continue;
1096 : :
1097 : : /*
1098 : : * Might as well avoid redundant check in the rare cases where
1099 : : * infer_collation_opclass_match() is required to do real work.
1100 : : * Otherwise, check that element expression appears in cataloged
1101 : : * index definition.
1102 : : */
1103 [ + + ]: 136 : if (elem->infercollid != InvalidOid ||
4142 1104 [ + + + + ]: 237 : elem->inferopclass != InvalidOid ||
4153 1105 : 116 : list_member(idxExprs, elem->expr))
1106 : 128 : continue;
1107 : :
293 alvherre@kurilemu.de 1108 : 8 : match = false;
1109 : 8 : break;
1110 : : }
1111 [ + + ]: 1438 : if (!match)
1112 : 37 : continue;
1113 : :
1114 : : /*
1115 : : * Now that all inference elements were matched, ensure that the
1116 : : * expression elements from inference clause are not missing any
1117 : : * cataloged expressions. This does the right thing when unique
1118 : : * indexes redundantly repeat the same attribute, or if attributes
1119 : : * redundantly appear multiple times within an inference clause.
1120 : : */
4153 andres@anarazel.de 1121 [ + + ]: 1401 : if (list_difference(idxExprs, inferElems) != NIL)
293 alvherre@kurilemu.de 1122 : 39 : continue;
1123 : :
4153 andres@anarazel.de 1124 : 1362 : predExprs = RelationGetIndexPredicate(idxRel);
285 rguo@postgresql.org 1125 [ + + ]: 1362 : if (predExprs)
1126 : : {
1127 [ + + ]: 53 : if (varno != 1)
1128 : 5 : ChangeVarNodes((Node *) predExprs, 1, varno, 0);
1129 : :
1130 : : predExprs = (List *)
1131 : 53 : eval_const_expressions(root,
1132 : 53 : (Node *) make_ands_explicit(predExprs));
1133 : 53 : predExprs = make_ands_implicit((Expr *) predExprs);
1134 : : }
1135 : :
1136 : : /*
1137 : : * If it's a partial index, its predicate must be implied by the ON
1138 : : * CONFLICT's WHERE clause.
1139 : : */
2 alvherre@kurilemu.de 1140 [ + + ]: 1362 : if (!predicate_implied_by(predExprs,
1141 : 1362 : (List *) onconflict->arbiterWhere, false))
1142 : 24 : continue;
1143 : :
1144 : : /* All good -- consider this index a match */
4142 andres@anarazel.de 1145 : 1338 : results = lappend_oid(results, idxForm->indexrelid);
300 alvherre@kurilemu.de 1146 : 1338 : foundValid |= idxForm->indisvalid;
1147 : : }
1148 : :
1149 : : /* Close all indexes */
293 1150 [ + + + + : 5542 : foreach_ptr(RelationData, idxRel, indexRelList)
+ + ]
1151 : : {
4153 andres@anarazel.de 1152 : 2220 : index_close(idxRel, NoLock);
1153 : : }
1154 : :
1155 : 1661 : list_free(indexList);
293 alvherre@kurilemu.de 1156 : 1661 : list_free(indexRelList);
2799 andres@anarazel.de 1157 : 1661 : table_close(relation, NoLock);
1158 : :
1159 : : /* We require at least one indisvalid index */
300 alvherre@kurilemu.de 1160 [ + + - + ]: 1661 : if (results == NIL || !foundValid)
4153 andres@anarazel.de 1161 [ + - ]: 212 : ereport(ERROR,
1162 : : (errcode(ERRCODE_INVALID_COLUMN_REFERENCE),
1163 : : errmsg("there is no unique or exclusion constraint matching the ON CONFLICT specification")));
1164 : :
4142 1165 : 1449 : return results;
1166 : : }
1167 : :
1168 : : /*
1169 : : * infer_collation_opclass_match - ensure infer element opclass/collation match
1170 : : *
1171 : : * Given unique index inference element from inference specification, if
1172 : : * collation was specified, or if opclass was specified, verify that there is
1173 : : * at least one matching indexed attribute (occasionally, there may be more).
1174 : : * Skip this in the common case where inference specification does not include
1175 : : * collation or opclass (instead matching everything, regardless of cataloged
1176 : : * collation/opclass of indexed attribute).
1177 : : *
1178 : : * At least historically, Postgres has not offered collations or opclasses
1179 : : * with alternative-to-default notions of equality, so these additional
1180 : : * criteria should only be required infrequently. XXX That is no longer
1181 : : * true: nondeterministic collations, supported since PostgreSQL 12, do
1182 : : * equate values that the default notion of equality keeps distinct.
1183 : : *
1184 : : * Don't give up immediately when an inference element matches some attribute
1185 : : * cataloged as indexed but not matching additional opclass/collation
1186 : : * criteria. This is done so that the implementation is as forgiving as
1187 : : * possible of redundancy within cataloged index attributes (or, less
1188 : : * usefully, within inference specification elements). If collations actually
1189 : : * differ between apparently redundantly indexed attributes (redundant within
1190 : : * or across indexes), then there really is no redundancy as such.
1191 : : *
1192 : : * Note that if an inference element specifies an opclass and a collation at
1193 : : * once, both must match in at least one particular attribute within index
1194 : : * catalog definition in order for that inference element to be considered
1195 : : * inferred/satisfied.
1196 : : */
1197 : : static bool
4153 1198 : 1770 : infer_collation_opclass_match(InferenceElem *elem, Relation idxRel,
1199 : : List *idxExprs)
1200 : : {
1201 : : AttrNumber natt;
3378 tgl@sss.pgh.pa.us 1202 : 1770 : Oid inferopfamily = InvalidOid; /* OID of opclass opfamily */
4074 andres@anarazel.de 1203 : 1770 : Oid inferopcinputtype = InvalidOid; /* OID of opclass input type */
3755 rhaas@postgresql.org 1204 : 1770 : int nplain = 0; /* # plain attrs observed */
1205 : :
1206 : : /*
1207 : : * If inference specification element lacks collation/opclass, then no
1208 : : * need to check for exact match.
1209 : : */
4142 andres@anarazel.de 1210 [ + + + + ]: 1770 : if (elem->infercollid == InvalidOid && elem->inferopclass == InvalidOid)
4153 1211 : 1676 : return true;
1212 : :
1213 : : /*
1214 : : * Lookup opfamily and input type, for matching indexes
1215 : : */
4142 1216 [ + + ]: 94 : if (elem->inferopclass)
1217 : : {
1218 : 69 : inferopfamily = get_opclass_family(elem->inferopclass);
1219 : 69 : inferopcinputtype = get_opclass_input_type(elem->inferopclass);
1220 : : }
1221 : :
4153 1222 [ + + ]: 202 : for (natt = 1; natt <= idxRel->rd_att->natts; natt++)
1223 : : {
4138 bruce@momjian.us 1224 : 173 : Oid opfamily = idxRel->rd_opfamily[natt - 1];
1225 : 173 : Oid opcinputtype = idxRel->rd_opcintype[natt - 1];
1226 : 173 : Oid collation = idxRel->rd_indcollation[natt - 1];
4074 andres@anarazel.de 1227 : 173 : int attno = idxRel->rd_index->indkey.values[natt - 1];
1228 : :
1229 [ + + ]: 173 : if (attno != 0)
1230 : 140 : nplain++;
1231 : :
4142 1232 [ + + + + ]: 173 : if (elem->inferopclass != InvalidOid &&
1233 [ - + ]: 54 : (inferopfamily != opfamily || inferopcinputtype != opcinputtype))
1234 : : {
1235 : : /* Attribute needed to match opclass, but didn't */
4153 1236 : 74 : continue;
1237 : : }
1238 : :
1239 [ + + ]: 99 : if (elem->infercollid != InvalidOid &&
1240 [ + + ]: 70 : elem->infercollid != collation)
1241 : : {
1242 : : /* Attribute needed to match collation, but didn't */
1243 : 30 : continue;
1244 : : }
1245 : :
1246 : : /* If one matching index att found, good enough -- return true */
4074 1247 [ + + ]: 69 : if (IsA(elem->expr, Var))
1248 : : {
1249 [ + - ]: 45 : if (((Var *) elem->expr)->varattno == attno)
1250 : 45 : return true;
1251 : : }
1252 [ + - ]: 24 : else if (attno == 0)
1253 : : {
1254 : 24 : Node *nattExpr = list_nth(idxExprs, (natt - 1) - nplain);
1255 : :
1256 : : /*
1257 : : * Note that unlike routines like match_index_to_operand() we
1258 : : * don't need to care about RelabelType. Neither the index
1259 : : * definition nor the inference clause should contain them.
1260 : : */
1261 [ + + ]: 24 : if (equal(elem->expr, nattExpr))
1262 : 20 : return true;
1263 : : }
1264 : : }
1265 : :
4153 1266 : 29 : return false;
1267 : : }
1268 : :
1269 : : /*
1270 : : * estimate_rel_size - estimate # pages and # tuples in a table or index
1271 : : *
1272 : : * We also estimate the fraction of the pages that are marked all-visible in
1273 : : * the visibility map, for use in estimation of index-only scans.
1274 : : *
1275 : : * If attr_widths isn't NULL, it points to the zero-index entry of the
1276 : : * relation's attr_widths[] cache; we fill this in if we have need to compute
1277 : : * the attribute widths for estimation purposes.
1278 : : */
1279 : : void
7963 tgl@sss.pgh.pa.us 1280 : 355233 : estimate_rel_size(Relation rel, int32 *attr_widths,
1281 : : BlockNumber *pages, double *tuples, double *allvisfrac)
1282 : : {
1283 : : BlockNumber curpages;
1284 : : BlockNumber relpages;
1285 : : double reltuples;
1286 : : BlockNumber relallvisible;
1287 : : double density;
1288 : :
1752 peter@eisentraut.org 1289 [ + + + + : 355233 : if (RELKIND_HAS_TABLE_AM(rel->rd_rel->relkind))
+ + ]
1290 : : {
1592 tgl@sss.pgh.pa.us 1291 : 352995 : table_relation_estimate_size(rel, attr_widths, pages, tuples,
1292 : : allvisfrac);
1293 : : }
1752 peter@eisentraut.org 1294 [ + + ]: 2238 : else if (rel->rd_rel->relkind == RELKIND_INDEX)
1295 : : {
1296 : : /*
1297 : : * XXX: It'd probably be good to move this into a callback, individual
1298 : : * index types e.g. know if they have a metapage.
1299 : : */
1300 : :
1301 : : /* it has storage, ok to call the smgr */
1592 tgl@sss.pgh.pa.us 1302 : 825 : curpages = RelationGetNumberOfBlocks(rel);
1303 : :
1304 : : /* report estimated # pages */
1305 : 825 : *pages = curpages;
1306 : : /* quick exit if rel is clearly empty */
1307 [ - + ]: 825 : if (curpages == 0)
1308 : : {
1592 tgl@sss.pgh.pa.us 1309 :UBC 0 : *tuples = 0;
1310 : 0 : *allvisfrac = 0;
1311 : 0 : return;
1312 : : }
1313 : :
1314 : : /* coerce values in pg_class to more desirable types */
1592 tgl@sss.pgh.pa.us 1315 :CBC 825 : relpages = (BlockNumber) rel->rd_rel->relpages;
1316 : 825 : reltuples = (double) rel->rd_rel->reltuples;
1317 : 825 : relallvisible = (BlockNumber) rel->rd_rel->relallvisible;
1318 : :
1319 : : /*
1320 : : * Discount the metapage while estimating the number of tuples. This
1321 : : * is a kluge because it assumes more than it ought to about index
1322 : : * structure. Currently it's OK for btree, hash, and GIN indexes but
1323 : : * suspect for GiST indexes.
1324 : : */
1325 [ + + ]: 825 : if (relpages > 0)
1326 : : {
1327 : 810 : curpages--;
1328 : 810 : relpages--;
1329 : : }
1330 : :
1331 : : /* estimate number of tuples from previous tuple density */
1332 [ + + + + ]: 825 : if (reltuples >= 0 && relpages > 0)
1333 : 610 : density = reltuples / (double) relpages;
1334 : : else
1335 : : {
1336 : : /*
1337 : : * If we have no data because the relation was never vacuumed,
1338 : : * estimate tuple width from attribute datatypes. We assume here
1339 : : * that the pages are completely full, which is OK for tables
1340 : : * (since they've presumably not been VACUUMed yet) but is
1341 : : * probably an overestimate for indexes. Fortunately
1342 : : * get_relation_info() can clamp the overestimate to the parent
1343 : : * table's size.
1344 : : *
1345 : : * Note: this code intentionally disregards alignment
1346 : : * considerations, because (a) that would be gilding the lily
1347 : : * considering how crude the estimate is, and (b) it creates
1348 : : * platform dependencies in the default plans which are kind of a
1349 : : * headache for regression testing.
1350 : : *
1351 : : * XXX: Should this logic be more index specific?
1352 : : */
1353 : : int32 tuple_width;
1354 : :
1355 : 215 : tuple_width = get_rel_data_width(rel, attr_widths);
1356 : 215 : tuple_width += MAXALIGN(SizeofHeapTupleHeader);
1357 : 215 : tuple_width += sizeof(ItemIdData);
1358 : : /* note: integer division is intentional here */
1359 : 215 : density = (BLCKSZ - SizeOfPageHeaderData) / tuple_width;
1360 : : }
1361 : 825 : *tuples = rint(density * (double) curpages);
1362 : :
1363 : : /*
1364 : : * We use relallvisible as-is, rather than scaling it up like we do
1365 : : * for the pages and tuples counts, on the theory that any pages added
1366 : : * since the last VACUUM are most likely not marked all-visible. But
1367 : : * costsize.c wants it converted to a fraction.
1368 : : */
1369 [ - + - - ]: 825 : if (relallvisible == 0 || curpages <= 0)
1370 : 825 : *allvisfrac = 0;
1592 tgl@sss.pgh.pa.us 1371 [ # # ]:UBC 0 : else if ((double) relallvisible >= curpages)
1372 : 0 : *allvisfrac = 1;
1373 : : else
1374 : 0 : *allvisfrac = (double) relallvisible / curpages;
1375 : : }
1376 : : else
1377 : : {
1378 : : /*
1379 : : * Just use whatever's in pg_class. This covers foreign tables,
1380 : : * sequences, and also relkinds without storage (shouldn't get here?);
1381 : : * see initializations in AddNewRelationTuple(). Note that FDW must
1382 : : * cope if reltuples is -1!
1383 : : */
1592 tgl@sss.pgh.pa.us 1384 :CBC 1413 : *pages = rel->rd_rel->relpages;
1385 : 1413 : *tuples = rel->rd_rel->reltuples;
1386 : 1413 : *allvisfrac = 0;
1387 : : }
1388 : : }
1389 : :
1390 : :
1391 : : /*
1392 : : * get_rel_data_width
1393 : : *
1394 : : * Estimate the average width of (the data part of) the relation's tuples.
1395 : : *
1396 : : * If attr_widths isn't NULL, it points to the zero-index entry of the
1397 : : * relation's attr_widths[] cache; use and update that cache as appropriate.
1398 : : *
1399 : : * Currently we ignore dropped columns. Ideally those should be included
1400 : : * in the result, but we haven't got any way to get info about them; and
1401 : : * since they might be mostly NULLs, treating them as zero-width is not
1402 : : * necessarily the wrong thing anyway.
1403 : : */
1404 : : int32
5827 1405 : 121073 : get_rel_data_width(Relation rel, int32 *attr_widths)
1406 : : {
1006 1407 : 121073 : int64 tuple_width = 0;
1408 : : int i;
1409 : :
5827 1410 [ + + ]: 673579 : for (i = 1; i <= RelationGetNumberOfAttributes(rel); i++)
1411 : : {
3318 andres@anarazel.de 1412 : 552506 : Form_pg_attribute att = TupleDescAttr(rel->rd_att, i - 1);
1413 : : int32 item_width;
1414 : :
5827 tgl@sss.pgh.pa.us 1415 [ + + ]: 552506 : if (att->attisdropped)
1416 : 2074 : continue;
1417 : :
1418 : : /* use previously cached data, if any */
5784 1419 [ + + + + ]: 550432 : if (attr_widths != NULL && attr_widths[i] > 0)
1420 : : {
1421 : 3554 : tuple_width += attr_widths[i];
1422 : 3554 : continue;
1423 : : }
1424 : :
1425 : : /* This should match set_rel_width() in costsize.c */
5827 1426 : 546878 : item_width = get_attavgwidth(RelationGetRelid(rel), i);
1427 [ + + ]: 546878 : if (item_width <= 0)
1428 : : {
1429 : 545722 : item_width = get_typavgwidth(att->atttypid, att->atttypmod);
1430 [ - + ]: 545722 : Assert(item_width > 0);
1431 : : }
1432 [ + + ]: 546878 : if (attr_widths != NULL)
1433 : 499145 : attr_widths[i] = item_width;
1434 : 546878 : tuple_width += item_width;
1435 : : }
1436 : :
1006 1437 : 121073 : return clamp_width_est(tuple_width);
1438 : : }
1439 : :
1440 : : /*
1441 : : * get_relation_data_width
1442 : : *
1443 : : * External API for get_rel_data_width: same behavior except we have to
1444 : : * open the relcache entry.
1445 : : */
1446 : : int32
5784 1447 : 1753 : get_relation_data_width(Oid relid, int32 *attr_widths)
1448 : : {
1449 : : int32 result;
1450 : : Relation relation;
1451 : :
1452 : : /* As above, assume relation is already locked */
2799 andres@anarazel.de 1453 : 1753 : relation = table_open(relid, NoLock);
1454 : :
5784 tgl@sss.pgh.pa.us 1455 : 1753 : result = get_rel_data_width(relation, attr_widths);
1456 : :
2799 andres@anarazel.de 1457 : 1753 : table_close(relation, NoLock);
1458 : :
5827 tgl@sss.pgh.pa.us 1459 : 1753 : return result;
1460 : : }
1461 : :
1462 : :
1463 : : /*
1464 : : * get_relation_constraints
1465 : : *
1466 : : * Retrieve the applicable constraint expressions of the given relation.
1467 : : * Only constraints that have been validated are considered.
1468 : : *
1469 : : * Returns a List (possibly empty) of constraint expressions. Each one
1470 : : * has been canonicalized, and its Vars are changed to have the varno
1471 : : * indicated by rel->relid. This allows the expressions to be easily
1472 : : * compared to expressions taken from WHERE.
1473 : : *
1474 : : * If include_noinherit is true, it's okay to include constraints that
1475 : : * are marked NO INHERIT.
1476 : : *
1477 : : * If include_notnull is true, "col IS NOT NULL" expressions are generated
1478 : : * and added to the result for each column that's marked attnotnull.
1479 : : *
1480 : : * If include_partition is true, and the relation is a partition,
1481 : : * also include the partitioning constraints.
1482 : : *
1483 : : * Note: at present this is invoked at most once per relation per planner
1484 : : * run, and in many cases it won't be invoked at all, so there seems no
1485 : : * point in caching the data in RelOptInfo.
1486 : : */
1487 : : static List *
6746 1488 : 16946 : get_relation_constraints(PlannerInfo *root,
1489 : : Oid relationObjectId, RelOptInfo *rel,
1490 : : bool include_noinherit,
1491 : : bool include_notnull,
1492 : : bool include_partition)
1493 : : {
7729 1494 : 16946 : List *result = NIL;
1495 : 16946 : Index varno = rel->relid;
1496 : : Relation relation;
1497 : : TupleConstr *constr;
1498 : :
1499 : : /*
1500 : : * We assume the relation has already been safely locked.
1501 : : */
2799 andres@anarazel.de 1502 : 16946 : relation = table_open(relationObjectId, NoLock);
1503 : :
7729 tgl@sss.pgh.pa.us 1504 : 16946 : constr = relation->rd_att->constr;
1505 [ + + ]: 16946 : if (constr != NULL)
1506 : : {
7645 bruce@momjian.us 1507 : 5820 : int num_check = constr->num_check;
1508 : : int i;
1509 : :
7729 tgl@sss.pgh.pa.us 1510 [ + + ]: 6389 : for (i = 0; i < num_check; i++)
1511 : : {
1512 : : Node *cexpr;
1513 : :
1514 : : /*
1515 : : * If this constraint hasn't been fully validated yet, we must
1516 : : * ignore it here.
1517 : : */
5590 alvherre@alvh.no-ip. 1518 [ + + ]: 569 : if (!constr->check[i].ccvalid)
1519 : 110 : continue;
1520 : :
1521 : : /*
1522 : : * NOT ENFORCED constraints are always marked as invalid, which
1523 : : * should have been ignored.
1524 : : */
617 peter@eisentraut.org 1525 [ - + ]: 459 : Assert(constr->check[i].ccenforced);
1526 : :
1527 : : /*
1528 : : * Also ignore if NO INHERIT and we weren't told that that's safe.
1529 : : */
2700 tgl@sss.pgh.pa.us 1530 [ + + - + ]: 459 : if (constr->check[i].ccnoinherit && !include_noinherit)
2700 tgl@sss.pgh.pa.us 1531 :UBC 0 : continue;
1532 : :
7729 tgl@sss.pgh.pa.us 1533 :CBC 459 : cexpr = stringToNode(constr->check[i].ccbin);
1534 : :
1535 : : /*
1536 : : * Fix Vars to have the desired varno. This must be done before
1537 : : * const-simplification because eval_const_expressions reduces
1538 : : * NullTest for Vars based on varno.
1539 : : */
385 rguo@postgresql.org 1540 [ + + ]: 459 : if (varno != 1)
1541 : 443 : ChangeVarNodes(cexpr, 1, varno, 0);
1542 : :
1543 : : /*
1544 : : * Run each expression through const-simplification and
1545 : : * canonicalization. This is not just an optimization, but is
1546 : : * necessary, because we will be comparing it to
1547 : : * similarly-processed qual clauses, and may fail to detect valid
1548 : : * matches without this. This must match the processing done to
1549 : : * qual clauses in preprocess_expression()! (We can skip the
1550 : : * stuff involving subqueries, however, since we don't allow any
1551 : : * in check constraints.)
1552 : : */
6746 tgl@sss.pgh.pa.us 1553 : 459 : cexpr = eval_const_expressions(root, cexpr);
1554 : :
3115 1555 : 459 : cexpr = (Node *) canonicalize_qual((Expr *) cexpr, true);
1556 : :
1557 : : /*
1558 : : * Finally, convert to implicit-AND format (that is, a List) and
1559 : : * append the resulting item(s) to our output list.
1560 : : */
7729 1561 : 459 : result = list_concat(result,
1562 : 459 : make_ands_implicit((Expr *) cexpr));
1563 : : }
1564 : :
1565 : : /* Add NOT NULL constraints in expression form, if requested */
6826 1566 [ + + + + ]: 5820 : if (include_notnull && constr->has_not_null)
1567 : : {
6310 bruce@momjian.us 1568 : 5431 : int natts = relation->rd_att->natts;
1569 : :
6826 tgl@sss.pgh.pa.us 1570 [ + + ]: 21294 : for (i = 1; i <= natts; i++)
1571 : : {
531 alvherre@alvh.no-ip. 1572 : 15863 : CompactAttribute *att = TupleDescCompactAttr(relation->rd_att, i - 1);
1573 : :
1574 [ + + + - ]: 15863 : if (att->attnullability == ATTNULLABLE_VALID && !att->attisdropped)
1575 : : {
1576 : 6882 : Form_pg_attribute wholeatt = TupleDescAttr(relation->rd_att, i - 1);
6310 bruce@momjian.us 1577 : 6882 : NullTest *ntest = makeNode(NullTest);
1578 : :
6826 tgl@sss.pgh.pa.us 1579 : 6882 : ntest->arg = (Expr *) makeVar(varno,
1580 : : i,
1581 : : wholeatt->atttypid,
1582 : : wholeatt->atttypmod,
1583 : : wholeatt->attcollation,
1584 : : 0);
1585 : 6882 : ntest->nulltesttype = IS_NOT_NULL;
1586 : :
1587 : : /*
1588 : : * argisrow=false is correct even for a composite column,
1589 : : * because attnotnull does not represent a SQL-spec IS NOT
1590 : : * NULL test in such a case, just IS DISTINCT FROM NULL.
1591 : : */
3706 1592 : 6882 : ntest->argisrow = false;
4228 1593 : 6882 : ntest->location = -1;
6826 1594 : 6882 : result = lappend(result, ntest);
1595 : : }
1596 : : }
1597 : : }
1598 : : }
1599 : :
1600 : : /*
1601 : : * Add partitioning constraints, if requested.
1602 : : */
2700 1603 [ + + + + ]: 16946 : if (include_partition && relation->rd_rel->relispartition)
1604 : : {
1605 : : /* make sure rel->partition_qual is set */
2595 alvherre@alvh.no-ip. 1606 : 10 : set_baserel_partition_constraint(relation, rel);
1607 : 10 : result = list_concat(result, rel->partition_qual);
1608 : : }
1609 : :
1610 : : /*
1611 : : * Expand virtual generated columns in the constraint expressions.
1612 : : */
370 peter@eisentraut.org 1613 [ + + ]: 16946 : if (result)
1614 : 5601 : result = (List *) expand_generated_columns_in_expr((Node *) result,
1615 : : relation,
1616 : : varno);
1617 : :
2799 andres@anarazel.de 1618 : 16946 : table_close(relation, NoLock);
1619 : :
7729 tgl@sss.pgh.pa.us 1620 : 16946 : return result;
1621 : : }
1622 : :
1623 : : /*
1624 : : * Try loading data for the statistics object.
1625 : : *
1626 : : * We don't know if the data (specified by statOid and inh value) exist.
1627 : : * The result is stored in stainfos list.
1628 : : */
1629 : : static void
1708 tomas.vondra@postgre 1630 : 3418 : get_relation_statistics_worker(List **stainfos, RelOptInfo *rel,
1631 : : Oid statOid, bool inh,
1632 : : Bitmapset *keys, List *exprs)
1633 : : {
1634 : : Form_pg_statistic_ext_data dataForm;
1635 : : HeapTuple dtup;
1636 : :
1637 : 3418 : dtup = SearchSysCache2(STATEXTDATASTXOID,
1638 : : ObjectIdGetDatum(statOid), BoolGetDatum(inh));
1639 [ + + ]: 3418 : if (!HeapTupleIsValid(dtup))
1640 : 1709 : return;
1641 : :
1642 : 1709 : dataForm = (Form_pg_statistic_ext_data) GETSTRUCT(dtup);
1643 : :
1644 : : /* add one StatisticExtInfo for each kind built */
1645 [ + + ]: 1709 : if (statext_is_kind_built(dtup, STATS_EXT_NDISTINCT))
1646 : : {
1647 : 608 : StatisticExtInfo *info = makeNode(StatisticExtInfo);
1648 : :
1649 : 608 : info->statOid = statOid;
1650 : 608 : info->inherit = dataForm->stxdinherit;
1651 : 608 : info->rel = rel;
1652 : 608 : info->kind = STATS_EXT_NDISTINCT;
1653 : 608 : info->keys = bms_copy(keys);
1654 : 608 : info->exprs = exprs;
1655 : :
1656 : 608 : *stainfos = lappend(*stainfos, info);
1657 : : }
1658 : :
1659 [ + + ]: 1709 : if (statext_is_kind_built(dtup, STATS_EXT_DEPENDENCIES))
1660 : : {
1661 : 453 : StatisticExtInfo *info = makeNode(StatisticExtInfo);
1662 : :
1663 : 453 : info->statOid = statOid;
1664 : 453 : info->inherit = dataForm->stxdinherit;
1665 : 453 : info->rel = rel;
1666 : 453 : info->kind = STATS_EXT_DEPENDENCIES;
1667 : 453 : info->keys = bms_copy(keys);
1668 : 453 : info->exprs = exprs;
1669 : :
1670 : 453 : *stainfos = lappend(*stainfos, info);
1671 : : }
1672 : :
1673 [ + + ]: 1709 : if (statext_is_kind_built(dtup, STATS_EXT_MCV))
1674 : : {
1675 : 758 : StatisticExtInfo *info = makeNode(StatisticExtInfo);
1676 : :
1677 : 758 : info->statOid = statOid;
1678 : 758 : info->inherit = dataForm->stxdinherit;
1679 : 758 : info->rel = rel;
1680 : 758 : info->kind = STATS_EXT_MCV;
1681 : 758 : info->keys = bms_copy(keys);
1682 : 758 : info->exprs = exprs;
1683 : :
1684 : 758 : *stainfos = lappend(*stainfos, info);
1685 : : }
1686 : :
1687 [ + + ]: 1709 : if (statext_is_kind_built(dtup, STATS_EXT_EXPRESSIONS))
1688 : : {
1689 : 716 : StatisticExtInfo *info = makeNode(StatisticExtInfo);
1690 : :
1691 : 716 : info->statOid = statOid;
1692 : 716 : info->inherit = dataForm->stxdinherit;
1693 : 716 : info->rel = rel;
1694 : 716 : info->kind = STATS_EXT_EXPRESSIONS;
1695 : 716 : info->keys = bms_copy(keys);
1696 : 716 : info->exprs = exprs;
1697 : :
1698 : 716 : *stainfos = lappend(*stainfos, info);
1699 : : }
1700 : :
1701 : 1709 : ReleaseSysCache(dtup);
1702 : : }
1703 : :
1704 : : /*
1705 : : * get_relation_statistics
1706 : : * Retrieve extended statistics defined on the table.
1707 : : *
1708 : : * Returns a List (possibly empty) of StatisticExtInfo objects describing
1709 : : * the statistics. Note that this doesn't load the actual statistics data,
1710 : : * just the identifying metadata. Only stats actually built are considered.
1711 : : */
1712 : : static List *
385 rguo@postgresql.org 1713 : 371836 : get_relation_statistics(PlannerInfo *root, RelOptInfo *rel,
1714 : : Relation relation)
1715 : : {
2004 tomas.vondra@postgre 1716 : 371836 : Index varno = rel->relid;
1717 : : List *statoidlist;
3467 alvherre@alvh.no-ip. 1718 : 371836 : List *stainfos = NIL;
1719 : : ListCell *l;
1720 : :
1721 : 371836 : statoidlist = RelationGetStatExtList(relation);
1722 : :
1723 [ + + + + : 373545 : foreach(l, statoidlist)
+ + ]
1724 : : {
1725 : 1709 : Oid statOid = lfirst_oid(l);
1726 : : Form_pg_statistic_ext staForm;
1727 : : HeapTuple htup;
1728 : 1709 : Bitmapset *keys = NULL;
2004 tomas.vondra@postgre 1729 : 1709 : List *exprs = NIL;
1730 : : int i;
1731 : :
3467 alvherre@alvh.no-ip. 1732 : 1709 : htup = SearchSysCache1(STATEXTOID, ObjectIdGetDatum(statOid));
2695 tgl@sss.pgh.pa.us 1733 [ - + ]: 1709 : if (!HeapTupleIsValid(htup))
3416 tgl@sss.pgh.pa.us 1734 [ # # ]:UBC 0 : elog(ERROR, "cache lookup failed for statistics object %u", statOid);
3467 alvherre@alvh.no-ip. 1735 :CBC 1709 : staForm = (Form_pg_statistic_ext) GETSTRUCT(htup);
1736 : :
1737 : : /*
1738 : : * First, build the array of columns covered. This is ultimately
1739 : : * wasted if no stats within the object have actually been built, but
1740 : : * it doesn't seem worth troubling over that case.
1741 : : */
3443 1742 [ + + ]: 4785 : for (i = 0; i < staForm->stxkeys.dim1; i++)
1743 : 3076 : keys = bms_add_member(keys, staForm->stxkeys.values[i]);
1744 : :
1745 : : /*
1746 : : * Preprocess expressions (if any). We read the expressions, fix the
1747 : : * varnos, and run them through eval_const_expressions.
1748 : : *
1749 : : * XXX We don't know yet if there are any data for this stats object,
1750 : : * with either stxdinherit value. But it's reasonable to assume there
1751 : : * is at least one of those, possibly both. So it's better to process
1752 : : * keys and expressions here.
1753 : : */
1754 : : {
1755 : : bool isnull;
1756 : : Datum datum;
1757 : :
1758 : : /* decode expression (if any) */
2004 tomas.vondra@postgre 1759 : 1709 : datum = SysCacheGetAttr(STATEXTOID, htup,
1760 : : Anum_pg_statistic_ext_stxexprs, &isnull);
1761 : :
1762 [ + + ]: 1709 : if (!isnull)
1763 : : {
1764 : : char *exprsString;
1765 : :
1766 : 723 : exprsString = TextDatumGetCString(datum);
1767 : 723 : exprs = (List *) stringToNode(exprsString);
1768 : 723 : pfree(exprsString);
1769 : :
1770 : : /* Expand virtual generated columns in the expressions */
172 dean.a.rasheed@gmail 1771 : 723 : exprs = (List *) expand_generated_columns_in_expr((Node *) exprs, relation, 1);
1772 : :
1773 : : /*
1774 : : * Modify the copies we obtain from the relcache to have the
1775 : : * correct varno for the parent relation, so that they match
1776 : : * up correctly against qual clauses.
1777 : : *
1778 : : * This must be done before const-simplification because
1779 : : * eval_const_expressions reduces NullTest for Vars based on
1780 : : * varno.
1781 : : */
385 rguo@postgresql.org 1782 [ - + ]: 723 : if (varno != 1)
385 rguo@postgresql.org 1783 :UBC 0 : ChangeVarNodes((Node *) exprs, 1, varno, 0);
1784 : :
1785 : : /*
1786 : : * Run the expressions through eval_const_expressions. This is
1787 : : * not just an optimization, but is necessary, because the
1788 : : * planner will be comparing them to similarly-processed qual
1789 : : * clauses, and may fail to detect valid matches without this.
1790 : : * We must not use canonicalize_qual, however, since these
1791 : : * aren't qual expressions.
1792 : : */
385 rguo@postgresql.org 1793 :CBC 723 : exprs = (List *) eval_const_expressions(root, (Node *) exprs);
1794 : :
1795 : : /* May as well fix opfuncids too */
2004 tomas.vondra@postgre 1796 : 723 : fix_opfuncids((Node *) exprs);
1797 : : }
1798 : : }
1799 : :
1800 : : /* extract statistics for possible values of stxdinherit flag */
1801 : :
1708 1802 : 1709 : get_relation_statistics_worker(&stainfos, rel, statOid, true, keys, exprs);
1803 : :
1804 : 1709 : get_relation_statistics_worker(&stainfos, rel, statOid, false, keys, exprs);
1805 : :
3467 alvherre@alvh.no-ip. 1806 : 1709 : ReleaseSysCache(htup);
1807 : 1709 : bms_free(keys);
1808 : : }
1809 : :
1810 : 371836 : list_free(statoidlist);
1811 : :
1812 : 371836 : return stainfos;
1813 : : }
1814 : :
1815 : : /*
1816 : : * relation_excluded_by_constraints
1817 : : *
1818 : : * Detect whether the relation need not be scanned because it has either
1819 : : * self-inconsistent restrictions, or restrictions inconsistent with the
1820 : : * relation's applicable constraints.
1821 : : *
1822 : : * Note: this examines only rel->relid, rel->reloptkind, and
1823 : : * rel->baserestrictinfo; therefore it can be called before filling in
1824 : : * other fields of the RelOptInfo.
1825 : : */
1826 : : bool
6746 tgl@sss.pgh.pa.us 1827 : 397915 : relation_excluded_by_constraints(PlannerInfo *root,
1828 : : RelOptInfo *rel, RangeTblEntry *rte)
1829 : : {
1830 : : bool include_noinherit;
1831 : : bool include_notnull;
2700 1832 : 397915 : bool include_partition = false;
1833 : : List *safe_restrictions;
1834 : : List *constraint_pred;
1835 : : List *safe_constraints;
1836 : : ListCell *lc;
1837 : :
1838 : : /* As of now, constraint exclusion works only with simple relations. */
3457 rhaas@postgresql.org 1839 [ + + - + ]: 397915 : Assert(IS_SIMPLE_REL(rel));
1840 : :
1841 : : /*
1842 : : * If there are no base restriction clauses, we have no hope of proving
1843 : : * anything below, so fall out quickly.
1844 : : */
2700 tgl@sss.pgh.pa.us 1845 [ + + ]: 397915 : if (rel->baserestrictinfo == NIL)
1846 : 186614 : return false;
1847 : :
1848 : : /*
1849 : : * Regardless of the setting of constraint_exclusion, detect
1850 : : * constant-FALSE-or-NULL restriction clauses. Although const-folding
1851 : : * will reduce "anything AND FALSE" to just "FALSE", the baserestrictinfo
1852 : : * list can still have other members besides the FALSE constant, due to
1853 : : * qual pushdown and other mechanisms; so check them all. This doesn't
1854 : : * fire very often, but it seems cheap enough to be worth doing anyway.
1855 : : * (Without this, we'd miss some optimizations that 9.5 and earlier found
1856 : : * via much more roundabout methods.)
1857 : : */
1075 1858 [ + - + + : 524223 : foreach(lc, rel->baserestrictinfo)
+ + ]
1859 : : {
1860 : 313478 : RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
3849 1861 : 313478 : Expr *clause = rinfo->clause;
1862 : :
1863 [ + - + + ]: 313478 : if (clause && IsA(clause, Const) &&
1864 [ + + ]: 556 : (((Const *) clause)->constisnull ||
1865 [ + - ]: 551 : !DatumGetBool(((Const *) clause)->constvalue)))
1866 : 556 : return true;
1867 : : }
1868 : :
1869 : : /*
1870 : : * Skip further tests, depending on constraint_exclusion.
1871 : : */
3072 alvherre@alvh.no-ip. 1872 [ + + + - ]: 210745 : switch (constraint_exclusion)
1873 : : {
1874 : 45 : case CONSTRAINT_EXCLUSION_OFF:
1875 : : /* In 'off' mode, never make any further tests */
1876 : 45 : return false;
1877 : :
1878 : 210584 : case CONSTRAINT_EXCLUSION_PARTITION:
1879 : :
1880 : : /*
1881 : : * When constraint_exclusion is set to 'partition' we only handle
1882 : : * appendrel members. Partition pruning has already been applied,
1883 : : * so there is no need to consider the rel's partition constraints
1884 : : * here.
1885 : : */
1999 tgl@sss.pgh.pa.us 1886 [ + + ]: 210584 : if (rel->reloptkind == RELOPT_OTHER_MEMBER_REL)
2700 1887 : 17147 : break; /* appendrel member, so process it */
1888 : 193437 : return false;
1889 : :
3072 alvherre@alvh.no-ip. 1890 : 116 : case CONSTRAINT_EXCLUSION_ON:
1891 : :
1892 : : /*
1893 : : * In 'on' mode, always apply constraint exclusion. If we are
1894 : : * considering a baserel that is a partition (i.e., it was
1895 : : * directly named rather than expanded from a parent table), then
1896 : : * its partition constraints haven't been considered yet, so
1897 : : * include them in the processing here.
1898 : : */
1999 tgl@sss.pgh.pa.us 1899 [ + + ]: 116 : if (rel->reloptkind == RELOPT_BASEREL)
2700 1900 : 91 : include_partition = true;
3069 1901 : 116 : break; /* always try to exclude */
1902 : : }
1903 : :
1904 : : /*
1905 : : * Check for self-contradictory restriction clauses. We dare not make
1906 : : * deductions with non-immutable functions, but any immutable clauses that
1907 : : * are self-contradictory allow us to conclude the scan is unnecessary.
1908 : : *
1909 : : * Note: strip off RestrictInfo because predicate_refuted_by() isn't
1910 : : * expecting to see any in its predicate argument.
1911 : : */
7351 1912 : 17263 : safe_restrictions = NIL;
1913 [ + - + + : 41083 : foreach(lc, rel->baserestrictinfo)
+ + ]
1914 : : {
1915 : 23820 : RestrictInfo *rinfo = (RestrictInfo *) lfirst(lc);
1916 : :
1917 [ + + ]: 23820 : if (!contain_mutable_functions((Node *) rinfo->clause))
1918 : 22525 : safe_restrictions = lappend(safe_restrictions, rinfo->clause);
1919 : : }
1920 : :
1921 : : /*
1922 : : * We can use weak refutation here, since we're comparing restriction
1923 : : * clauses with restriction clauses.
1924 : : */
3117 1925 [ + + ]: 17263 : if (predicate_refuted_by(safe_restrictions, safe_restrictions, true))
7351 1926 : 60 : return true;
1927 : :
1928 : : /*
1929 : : * Only plain relations have constraints, so stop here for other rtekinds.
1930 : : */
2700 1931 [ + + ]: 17203 : if (rte->rtekind != RTE_RELATION)
7533 1932 : 257 : return false;
1933 : :
1934 : : /*
1935 : : * If we are scanning just this table, we can use NO INHERIT constraints,
1936 : : * but not if we're scanning its children too. (Note that partitioned
1937 : : * tables should never have NO INHERIT constraints; but it's not necessary
1938 : : * for us to assume that here.)
1939 : : */
2700 1940 : 16946 : include_noinherit = !rte->inh;
1941 : :
1942 : : /*
1943 : : * Currently, attnotnull constraints must be treated as NO INHERIT unless
1944 : : * this is a partitioned table. In future we might track their
1945 : : * inheritance status more accurately, allowing this to be refined.
1946 : : *
1947 : : * XXX do we need/want to change this?
1948 : : */
1949 [ + + + + ]: 16946 : include_notnull = (!rte->inh || rte->relkind == RELKIND_PARTITIONED_TABLE);
1950 : :
1951 : : /*
1952 : : * Fetch the appropriate set of constraint expressions.
1953 : : */
1954 : 16946 : constraint_pred = get_relation_constraints(root, rte->relid, rel,
1955 : : include_noinherit,
1956 : : include_notnull,
1957 : : include_partition);
1958 : :
1959 : : /*
1960 : : * We do not currently enforce that CHECK constraints contain only
1961 : : * immutable functions, so it's necessary to check here. We daren't draw
1962 : : * conclusions from plan-time evaluation of non-immutable functions. Since
1963 : : * they're ANDed, we can just ignore any mutable constraints in the list,
1964 : : * and reason about the rest.
1965 : : */
7351 1966 : 16946 : safe_constraints = NIL;
1967 [ + + + + : 24437 : foreach(lc, constraint_pred)
+ + ]
1968 : : {
7291 bruce@momjian.us 1969 : 7491 : Node *pred = (Node *) lfirst(lc);
1970 : :
7351 tgl@sss.pgh.pa.us 1971 [ + - ]: 7491 : if (!contain_mutable_functions(pred))
1972 : 7491 : safe_constraints = lappend(safe_constraints, pred);
1973 : : }
1974 : :
1975 : : /*
1976 : : * The constraints are effectively ANDed together, so we can just try to
1977 : : * refute the entire collection at once. This may allow us to make proofs
1978 : : * that would fail if we took them individually.
1979 : : *
1980 : : * Note: we use rel->baserestrictinfo, not safe_restrictions as might seem
1981 : : * an obvious optimization. Some of the clauses might be OR clauses that
1982 : : * have volatile and nonvolatile subclauses, and it's OK to make
1983 : : * deductions with the nonvolatile parts.
1984 : : *
1985 : : * We need strong refutation because we have to prove that the constraints
1986 : : * would yield false, not just NULL.
1987 : : */
3385 rhaas@postgresql.org 1988 [ + + ]: 16946 : if (predicate_refuted_by(safe_constraints, rel->baserestrictinfo, false))
7533 tgl@sss.pgh.pa.us 1989 : 161 : return true;
1990 : :
1991 : 16785 : return false;
1992 : : }
1993 : :
1994 : :
1995 : : /*
1996 : : * build_physical_tlist
1997 : : *
1998 : : * Build a targetlist consisting of exactly the relation's user attributes,
1999 : : * in order. The executor can special-case such tlists to avoid a projection
2000 : : * step at runtime, so we use such tlists preferentially for scan nodes.
2001 : : *
2002 : : * Exception: if there are any dropped or missing columns, we punt and return
2003 : : * NIL. Ideally we would like to handle these cases too. However this
2004 : : * creates problems for ExecTypeFromTL, which may be asked to build a tupdesc
2005 : : * for a tlist that includes vars of no-longer-existent types. In theory we
2006 : : * could dig out the required info from the pg_attribute entries of the
2007 : : * relation, but that data is not readily available to ExecTypeFromTL.
2008 : : * For now, we don't apply the physical-tlist optimization when there are
2009 : : * dropped cols.
2010 : : *
2011 : : * We also support building a "physical" tlist for subqueries, functions,
2012 : : * values lists, table expressions, and CTEs, since the same optimization can
2013 : : * occur in SubqueryScan, FunctionScan, ValuesScan, CteScan, TableFunc,
2014 : : * NamedTuplestoreScan, and WorkTableScan nodes.
2015 : : */
2016 : : List *
7777 2017 : 144302 : build_physical_tlist(PlannerInfo *root, RelOptInfo *rel)
2018 : : {
7791 2019 : 144302 : List *tlist = NIL;
8484 2020 : 144302 : Index varno = rel->relid;
7092 2021 [ + - ]: 144302 : RangeTblEntry *rte = planner_rt_fetch(varno, root);
2022 : : Relation relation;
2023 : : Query *subquery;
2024 : : Var *var;
2025 : : ListCell *l;
2026 : : int attrno,
2027 : : numattrs;
2028 : : List *colvars;
2029 : :
7791 2030 [ + + + - ]: 144302 : switch (rte->rtekind)
2031 : : {
2032 : 123729 : case RTE_RELATION:
2033 : : /* Assume we already have adequate lock */
2799 andres@anarazel.de 2034 : 123729 : relation = table_open(rte->relid, NoLock);
2035 : :
7791 tgl@sss.pgh.pa.us 2036 : 123729 : numattrs = RelationGetNumberOfAttributes(relation);
2037 [ + + ]: 2114851 : for (attrno = 1; attrno <= numattrs; attrno++)
2038 : : {
3318 andres@anarazel.de 2039 : 1991208 : Form_pg_attribute att_tup = TupleDescAttr(relation->rd_att,
2040 : : attrno - 1);
2041 : :
3098 andrew@dunslane.net 2042 [ + + + + ]: 1991208 : if (att_tup->attisdropped || att_tup->atthasmissing)
2043 : : {
2044 : : /* found a dropped or missing col, so punt */
7791 tgl@sss.pgh.pa.us 2045 : 86 : tlist = NIL;
2046 : 86 : break;
2047 : : }
2048 : :
2049 : 1991122 : var = makeVar(varno,
2050 : : attrno,
2051 : : att_tup->atttypid,
2052 : : att_tup->atttypmod,
2053 : : att_tup->attcollation,
2054 : : 0);
2055 : :
2056 : 1991122 : tlist = lappend(tlist,
2057 : 1991122 : makeTargetEntry((Expr *) var,
2058 : : attrno,
2059 : : NULL,
2060 : : false));
2061 : : }
2062 : :
2799 andres@anarazel.de 2063 : 123729 : table_close(relation, NoLock);
8484 tgl@sss.pgh.pa.us 2064 : 123729 : break;
2065 : :
7791 2066 : 5264 : case RTE_SUBQUERY:
2067 : 5264 : subquery = rte->subquery;
2068 [ + - + + : 20896 : foreach(l, subquery->targetList)
+ + ]
2069 : : {
2070 : 15632 : TargetEntry *tle = (TargetEntry *) lfirst(l);
2071 : :
2072 : : /*
2073 : : * A resjunk column of the subquery can be reflected as
2074 : : * resjunk in the physical tlist; we need not punt.
2075 : : */
5868 peter_e@gmx.net 2076 : 15632 : var = makeVarFromTargetEntry(varno, tle);
2077 : :
7791 tgl@sss.pgh.pa.us 2078 : 15632 : tlist = lappend(tlist,
2079 : 15632 : makeTargetEntry((Expr *) var,
2080 : 15632 : tle->resno,
2081 : : NULL,
2082 : 15632 : tle->resjunk));
2083 : : }
2084 : 5264 : break;
2085 : :
7783 2086 : 15309 : case RTE_FUNCTION:
2087 : : case RTE_TABLEFUNC:
2088 : : case RTE_VALUES:
2089 : : case RTE_CTE:
2090 : : case RTE_NAMEDTUPLESTORE:
2091 : : case RTE_RESULT:
2092 : : /* Not all of these can have dropped cols, but share code anyway */
612 dean.a.rasheed@gmail 2093 : 15309 : expandRTE(rte, varno, 0, VAR_RETURNING_DEFAULT, -1,
2094 : : true /* include dropped */ , NULL, &colvars);
7783 tgl@sss.pgh.pa.us 2095 [ + - + + : 72999 : foreach(l, colvars)
+ + ]
2096 : : {
2097 : 57690 : var = (Var *) lfirst(l);
2098 : :
2099 : : /*
2100 : : * A non-Var in expandRTE's output means a dropped column;
2101 : : * must punt.
2102 : : */
2103 [ - + ]: 57690 : if (!IsA(var, Var))
2104 : : {
7783 tgl@sss.pgh.pa.us 2105 :UBC 0 : tlist = NIL;
2106 : 0 : break;
2107 : : }
2108 : :
7783 tgl@sss.pgh.pa.us 2109 :CBC 57690 : tlist = lappend(tlist,
2110 : 57690 : makeTargetEntry((Expr *) var,
2111 : 57690 : var->varattno,
2112 : : NULL,
2113 : : false));
2114 : : }
2115 : 15309 : break;
2116 : :
7791 tgl@sss.pgh.pa.us 2117 :UBC 0 : default:
2118 : : /* caller error */
2119 [ # # ]: 0 : elog(ERROR, "unsupported RTE kind %d in build_physical_tlist",
2120 : : (int) rte->rtekind);
2121 : : break;
2122 : : }
2123 : :
8146 tgl@sss.pgh.pa.us 2124 :CBC 144302 : return tlist;
2125 : : }
2126 : :
2127 : : /*
2128 : : * build_index_tlist
2129 : : *
2130 : : * Build a targetlist representing the columns of the specified index.
2131 : : * Each column is represented by a Var for the corresponding base-relation
2132 : : * column, or an expression in base-relation Vars, as appropriate.
2133 : : *
2134 : : * There are never any dropped columns in indexes, so unlike
2135 : : * build_physical_tlist, we need no failure case.
2136 : : */
2137 : : static List *
5458 2138 : 589897 : build_index_tlist(PlannerInfo *root, IndexOptInfo *index,
2139 : : Relation heapRelation)
2140 : : {
2141 : 589897 : List *tlist = NIL;
2142 : 589897 : Index varno = index->rel->relid;
2143 : : ListCell *indexpr_item;
2144 : : int i;
2145 : :
2146 : 589897 : indexpr_item = list_head(index->indexprs);
2147 [ + + ]: 1684835 : for (i = 0; i < index->ncolumns; i++)
2148 : : {
2149 : 1094938 : int indexkey = index->indexkeys[i];
2150 : : Expr *indexvar;
2151 : :
2152 [ + + ]: 1094938 : if (indexkey != 0)
2153 : : {
2154 : : /* simple column */
2155 : : const FormData_pg_attribute *att_tup;
2156 : :
2157 [ - + ]: 1092235 : if (indexkey < 0)
2861 andres@anarazel.de 2158 :UBC 0 : att_tup = SystemAttributeDefinition(indexkey);
2159 : : else
3318 andres@anarazel.de 2160 :CBC 1092235 : att_tup = TupleDescAttr(heapRelation->rd_att, indexkey - 1);
2161 : :
5458 tgl@sss.pgh.pa.us 2162 : 1092235 : indexvar = (Expr *) makeVar(varno,
2163 : : indexkey,
2164 : 1092235 : att_tup->atttypid,
2165 : 1092235 : att_tup->atttypmod,
2166 : 1092235 : att_tup->attcollation,
2167 : : 0);
2168 : : }
2169 : : else
2170 : : {
2171 : : /* expression column */
2172 [ - + ]: 2703 : if (indexpr_item == NULL)
5458 tgl@sss.pgh.pa.us 2173 [ # # ]:UBC 0 : elog(ERROR, "wrong number of index expressions");
5458 tgl@sss.pgh.pa.us 2174 :CBC 2703 : indexvar = (Expr *) lfirst(indexpr_item);
2624 2175 : 2703 : indexpr_item = lnext(index->indexprs, indexpr_item);
2176 : : }
2177 : :
5458 2178 : 1094938 : tlist = lappend(tlist,
2179 : 1094938 : makeTargetEntry(indexvar,
2180 : 1094938 : i + 1,
2181 : : NULL,
2182 : : false));
2183 : : }
2184 [ - + ]: 589897 : if (indexpr_item != NULL)
5458 tgl@sss.pgh.pa.us 2185 [ # # ]:UBC 0 : elog(ERROR, "wrong number of index expressions");
2186 : :
5458 tgl@sss.pgh.pa.us 2187 :CBC 589897 : return tlist;
2188 : : }
2189 : :
2190 : : /*
2191 : : * restriction_selectivity
2192 : : *
2193 : : * Returns the selectivity of a specified restriction operator clause.
2194 : : * This code executes registered procedures stored in the
2195 : : * operator relation, by calling the function manager.
2196 : : *
2197 : : * See clause_selectivity() for the meaning of the additional parameters.
2198 : : */
2199 : : Selectivity
7777 2200 : 594371 : restriction_selectivity(PlannerInfo *root,
2201 : : Oid operatorid,
2202 : : List *args,
2203 : : Oid inputcollid,
2204 : : int varRelid)
2205 : : {
6275 peter_e@gmx.net 2206 : 594371 : RegProcedure oprrest = get_oprrest(operatorid);
2207 : : float8 result;
2208 : :
2209 : : /*
2210 : : * if the oprrest procedure is missing for whatever reason, use a
2211 : : * selectivity of 0.5
2212 : : */
9254 tgl@sss.pgh.pa.us 2213 [ + + ]: 594371 : if (!oprrest)
2214 : 96 : return (Selectivity) 0.5;
2215 : :
5187 2216 : 594275 : result = DatumGetFloat8(OidFunctionCall4Coll(oprrest,
2217 : : inputcollid,
2218 : : PointerGetDatum(root),
2219 : : ObjectIdGetDatum(operatorid),
2220 : : PointerGetDatum(args),
2221 : : Int32GetDatum(varRelid)));
2222 : :
9609 2223 [ + - - + ]: 594255 : if (result < 0.0 || result > 1.0)
8458 tgl@sss.pgh.pa.us 2224 [ # # ]:UBC 0 : elog(ERROR, "invalid restriction selectivity: %f", result);
2225 : :
9609 tgl@sss.pgh.pa.us 2226 :CBC 594255 : return (Selectivity) result;
2227 : : }
2228 : :
2229 : : /*
2230 : : * join_selectivity
2231 : : *
2232 : : * Returns the selectivity of a specified join operator clause.
2233 : : * This code executes registered procedures stored in the
2234 : : * operator relation, by calling the function manager.
2235 : : *
2236 : : * See clause_selectivity() for the meaning of the additional parameters.
2237 : : */
2238 : : Selectivity
7777 2239 : 215367 : join_selectivity(PlannerInfo *root,
2240 : : Oid operatorid,
2241 : : List *args,
2242 : : Oid inputcollid,
2243 : : JoinType jointype,
2244 : : SpecialJoinInfo *sjinfo)
2245 : : {
6275 peter_e@gmx.net 2246 : 215367 : RegProcedure oprjoin = get_oprjoin(operatorid);
2247 : : float8 result;
2248 : :
2249 : : /*
2250 : : * if the oprjoin procedure is missing for whatever reason, use a
2251 : : * selectivity of 0.5
2252 : : */
9254 tgl@sss.pgh.pa.us 2253 [ + + ]: 215367 : if (!oprjoin)
2254 : 119 : return (Selectivity) 0.5;
2255 : :
5187 2256 : 215248 : result = DatumGetFloat8(OidFunctionCall5Coll(oprjoin,
2257 : : inputcollid,
2258 : : PointerGetDatum(root),
2259 : : ObjectIdGetDatum(operatorid),
2260 : : PointerGetDatum(args),
2261 : : Int16GetDatum(jointype),
2262 : : PointerGetDatum(sjinfo)));
2263 : :
9609 2264 [ + - - + ]: 215248 : if (result < 0.0 || result > 1.0)
8458 tgl@sss.pgh.pa.us 2265 [ # # ]:UBC 0 : elog(ERROR, "invalid join selectivity: %f", result);
2266 : :
9609 tgl@sss.pgh.pa.us 2267 :CBC 215248 : return (Selectivity) result;
2268 : : }
2269 : :
2270 : : /*
2271 : : * function_selectivity
2272 : : *
2273 : : * Attempt to estimate the selectivity of a specified boolean function clause
2274 : : * by asking its support function. If the function lacks support, return -1.
2275 : : *
2276 : : * See clause_selectivity() for the meaning of the additional parameters.
2277 : : */
2278 : : Selectivity
2780 2279 : 11098 : function_selectivity(PlannerInfo *root,
2280 : : Oid funcid,
2281 : : List *args,
2282 : : Oid inputcollid,
2283 : : bool is_join,
2284 : : int varRelid,
2285 : : JoinType jointype,
2286 : : SpecialJoinInfo *sjinfo)
2287 : : {
2288 : 11098 : RegProcedure prosupport = get_func_support(funcid);
2289 : : SupportRequestSelectivity req;
2290 : : SupportRequestSelectivity *sresult;
2291 : :
2292 [ + + ]: 11098 : if (!prosupport)
365 2293 : 11073 : return (Selectivity) -1; /* no support function */
2294 : :
2780 2295 : 25 : req.type = T_SupportRequestSelectivity;
2296 : 25 : req.root = root;
2297 : 25 : req.funcid = funcid;
2298 : 25 : req.args = args;
2299 : 25 : req.inputcollid = inputcollid;
2300 : 25 : req.is_join = is_join;
2301 : 25 : req.varRelid = varRelid;
2302 : 25 : req.jointype = jointype;
2303 : 25 : req.sjinfo = sjinfo;
2304 : 25 : req.selectivity = -1; /* to catch failure to set the value */
2305 : :
2306 : : sresult = (SupportRequestSelectivity *)
2307 : 25 : DatumGetPointer(OidFunctionCall1(prosupport,
2308 : : PointerGetDatum(&req)));
2309 : :
2310 [ - + ]: 25 : if (sresult != &req)
365 tgl@sss.pgh.pa.us 2311 :UBC 0 : return (Selectivity) -1; /* function did not honor request */
2312 : :
2780 tgl@sss.pgh.pa.us 2313 [ + - - + ]:CBC 25 : if (req.selectivity < 0.0 || req.selectivity > 1.0)
2780 tgl@sss.pgh.pa.us 2314 [ # # ]:UBC 0 : elog(ERROR, "invalid function selectivity: %f", req.selectivity);
2315 : :
2780 tgl@sss.pgh.pa.us 2316 :CBC 25 : return (Selectivity) req.selectivity;
2317 : : }
2318 : :
2319 : : /*
2320 : : * add_function_cost
2321 : : *
2322 : : * Get an estimate of the execution cost of a function, and *add* it to
2323 : : * the contents of *cost. The estimate may include both one-time and
2324 : : * per-tuple components, since QualCost does.
2325 : : *
2326 : : * The funcid must always be supplied. If it is being called as the
2327 : : * implementation of a specific parsetree node (FuncExpr, OpExpr,
2328 : : * WindowFunc, etc), pass that as "node", else pass NULL.
2329 : : *
2330 : : * In some usages root might be NULL, too.
2331 : : */
2332 : : void
2333 : 899840 : add_function_cost(PlannerInfo *root, Oid funcid, Node *node,
2334 : : QualCost *cost)
2335 : : {
2336 : : HeapTuple proctup;
2337 : : Form_pg_proc procform;
2338 : :
2339 : 899840 : proctup = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcid));
2340 [ - + ]: 899840 : if (!HeapTupleIsValid(proctup))
2780 tgl@sss.pgh.pa.us 2341 [ # # ]:UBC 0 : elog(ERROR, "cache lookup failed for function %u", funcid);
2780 tgl@sss.pgh.pa.us 2342 :CBC 899840 : procform = (Form_pg_proc) GETSTRUCT(proctup);
2343 : :
2344 [ + + ]: 899840 : if (OidIsValid(procform->prosupport))
2345 : : {
2346 : : SupportRequestCost req;
2347 : : SupportRequestCost *sresult;
2348 : :
2349 : 27551 : req.type = T_SupportRequestCost;
2350 : 27551 : req.root = root;
2351 : 27551 : req.funcid = funcid;
2352 : 27551 : req.node = node;
2353 : :
2354 : : /* Initialize cost fields so that support function doesn't have to */
2355 : 27551 : req.startup = 0;
2356 : 27551 : req.per_tuple = 0;
2357 : :
2358 : : sresult = (SupportRequestCost *)
2359 : 27551 : DatumGetPointer(OidFunctionCall1(procform->prosupport,
2360 : : PointerGetDatum(&req)));
2361 : :
2362 [ + + ]: 27551 : if (sresult == &req)
2363 : : {
2364 : : /* Success, so accumulate support function's estimate into *cost */
2365 : 15 : cost->startup += req.startup;
2366 : 15 : cost->per_tuple += req.per_tuple;
2367 : 15 : ReleaseSysCache(proctup);
2368 : 15 : return;
2369 : : }
2370 : : }
2371 : :
2372 : : /* No support function, or it failed, so rely on procost */
2373 : 899825 : cost->per_tuple += procform->procost * cpu_operator_cost;
2374 : :
2375 : 899825 : ReleaseSysCache(proctup);
2376 : : }
2377 : :
2378 : : /*
2379 : : * get_function_rows
2380 : : *
2381 : : * Get an estimate of the number of rows returned by a set-returning function.
2382 : : *
2383 : : * The funcid must always be supplied. In current usage, the calling node
2384 : : * will always be supplied, and will be either a FuncExpr or OpExpr.
2385 : : * But it's a good idea to not fail if it's NULL.
2386 : : *
2387 : : * In some usages root might be NULL, too.
2388 : : *
2389 : : * Note: this returns the unfiltered result of the support function, if any.
2390 : : * It's usually a good idea to apply clamp_row_est() to the result, but we
2391 : : * leave it to the caller to do so.
2392 : : */
2393 : : double
2394 : 40182 : get_function_rows(PlannerInfo *root, Oid funcid, Node *node)
2395 : : {
2396 : : HeapTuple proctup;
2397 : : Form_pg_proc procform;
2398 : : double result;
2399 : :
2400 : 40182 : proctup = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcid));
2401 [ - + ]: 40182 : if (!HeapTupleIsValid(proctup))
2780 tgl@sss.pgh.pa.us 2402 [ # # ]:UBC 0 : elog(ERROR, "cache lookup failed for function %u", funcid);
2780 tgl@sss.pgh.pa.us 2403 :CBC 40182 : procform = (Form_pg_proc) GETSTRUCT(proctup);
2404 : :
2405 [ - + ]: 40182 : Assert(procform->proretset); /* else caller error */
2406 : :
2407 [ + + ]: 40182 : if (OidIsValid(procform->prosupport))
2408 : : {
2409 : : SupportRequestRows req;
2410 : : SupportRequestRows *sresult;
2411 : :
2412 : 15787 : req.type = T_SupportRequestRows;
2413 : 15787 : req.root = root;
2414 : 15787 : req.funcid = funcid;
2415 : 15787 : req.node = node;
2416 : :
2417 : 15787 : req.rows = 0; /* just for sanity */
2418 : :
2419 : : sresult = (SupportRequestRows *)
2420 : 15787 : DatumGetPointer(OidFunctionCall1(procform->prosupport,
2421 : : PointerGetDatum(&req)));
2422 : :
2423 [ + + ]: 15787 : if (sresult == &req)
2424 : : {
2425 : : /* Success */
2426 : 12431 : ReleaseSysCache(proctup);
2427 : 12431 : return req.rows;
2428 : : }
2429 : : }
2430 : :
2431 : : /* No support function, or it failed, so rely on prorows */
2432 : 27751 : result = procform->prorows;
2433 : :
2434 : 27751 : ReleaseSysCache(proctup);
2435 : :
2436 : 27751 : return result;
2437 : : }
2438 : :
2439 : : /*
2440 : : * has_unique_index
2441 : : *
2442 : : * Detect whether there is a unique index on the specified attribute
2443 : : * of the specified relation, thus allowing us to conclude that all
2444 : : * the (non-null) values of the attribute are distinct.
2445 : : *
2446 : : * This function does not check the index's indimmediate property, which
2447 : : * means that uniqueness may transiently fail to hold intra-transaction.
2448 : : * That's appropriate when we are making statistical estimates, but beware
2449 : : * of using this for any correctness proofs.
2450 : : */
2451 : : bool
9254 2452 : 1786355 : has_unique_index(RelOptInfo *rel, AttrNumber attno)
2453 : : {
2454 : : ListCell *ilist;
2455 : :
2456 [ + + + + : 4498657 : foreach(ilist, rel->indexlist)
+ + ]
2457 : : {
2458 : 3241561 : IndexOptInfo *index = (IndexOptInfo *) lfirst(ilist);
2459 : :
2460 : : /*
2461 : : * Note: ignore partial indexes, since they don't allow us to conclude
2462 : : * that all attr values are distinct, *unless* they are marked predOK
2463 : : * which means we know the index's predicate is satisfied by the
2464 : : * query. We don't take any interest in expressional indexes either.
2465 : : * Also, a multicolumn unique index doesn't allow us to conclude that
2466 : : * just the specified attr is unique.
2467 : : */
2468 [ + + ]: 3241561 : if (index->unique &&
3088 teodor@sigaev.ru 2469 [ + + ]: 2296443 : index->nkeycolumns == 1 &&
9254 tgl@sss.pgh.pa.us 2470 [ + + ]: 1259216 : index->indexkeys[0] == attno &&
6426 2471 [ + + + + ]: 529319 : (index->indpred == NIL || index->predOK))
9254 2472 : 529259 : return true;
2473 : : }
2474 : 1257096 : return false;
2475 : : }
2476 : :
2477 : :
2478 : : /*
2479 : : * has_row_triggers
2480 : : *
2481 : : * Detect whether the specified relation has any row-level triggers for event.
2482 : : */
2483 : : bool
3838 rhaas@postgresql.org 2484 : 263 : has_row_triggers(PlannerInfo *root, Index rti, CmdType event)
2485 : : {
2486 [ + - ]: 263 : RangeTblEntry *rte = planner_rt_fetch(rti, root);
2487 : : Relation relation;
2488 : : TriggerDesc *trigDesc;
2489 : 263 : bool result = false;
2490 : :
2491 : : /* Assume we already have adequate lock */
2799 andres@anarazel.de 2492 : 263 : relation = table_open(rte->relid, NoLock);
2493 : :
3838 rhaas@postgresql.org 2494 : 263 : trigDesc = relation->trigdesc;
2495 [ + + + - : 263 : switch (event)
- ]
2496 : : {
2497 : 82 : case CMD_INSERT:
2498 [ + + ]: 82 : if (trigDesc &&
2499 [ + + ]: 13 : (trigDesc->trig_insert_after_row ||
2500 [ + - ]: 7 : trigDesc->trig_insert_before_row))
2501 : 13 : result = true;
2502 : 82 : break;
2503 : 100 : case CMD_UPDATE:
2504 [ + + ]: 100 : if (trigDesc &&
2505 [ + + ]: 24 : (trigDesc->trig_update_after_row ||
2506 [ + + ]: 14 : trigDesc->trig_update_before_row))
2507 : 18 : result = true;
2508 : 100 : break;
2509 : 81 : case CMD_DELETE:
2510 [ + + ]: 81 : if (trigDesc &&
2511 [ + + ]: 15 : (trigDesc->trig_delete_after_row ||
2512 [ + + ]: 9 : trigDesc->trig_delete_before_row))
2513 : 8 : result = true;
2514 : 81 : break;
2515 : : /* There is no separate event for MERGE, only INSERT/UPDATE/DELETE */
1637 alvherre@alvh.no-ip. 2516 :UBC 0 : case CMD_MERGE:
2517 : 0 : result = false;
408 efujita@postgresql.o 2518 : 0 : break;
2519 : 0 : default:
2520 [ # # ]: 0 : elog(ERROR, "unrecognized CmdType: %d", (int) event);
2521 : : break;
2522 : : }
2523 : :
408 efujita@postgresql.o 2524 :CBC 263 : table_close(relation, NoLock);
2525 : 263 : return result;
2526 : : }
2527 : :
2528 : : /*
2529 : : * has_transition_tables
2530 : : *
2531 : : * Detect whether the specified relation has any transition tables for event.
2532 : : */
2533 : : bool
2534 : 200 : has_transition_tables(PlannerInfo *root, Index rti, CmdType event)
2535 : : {
2536 [ + - ]: 200 : RangeTblEntry *rte = planner_rt_fetch(rti, root);
2537 : : Relation relation;
2538 : : TriggerDesc *trigDesc;
2539 : 200 : bool result = false;
2540 : :
2541 [ - + ]: 200 : Assert(rte->rtekind == RTE_RELATION);
2542 : :
2543 : : /* Currently foreign tables cannot have transition tables */
2544 [ + + ]: 200 : if (rte->relkind == RELKIND_FOREIGN_TABLE)
2545 : 148 : return result;
2546 : :
2547 : : /* Assume we already have adequate lock */
2548 : 52 : relation = table_open(rte->relid, NoLock);
2549 : :
2550 : 52 : trigDesc = relation->trigdesc;
2551 [ - + + - : 52 : switch (event)
- ]
2552 : : {
408 efujita@postgresql.o 2553 :UBC 0 : case CMD_INSERT:
2554 [ # # ]: 0 : if (trigDesc &&
2555 [ # # ]: 0 : trigDesc->trig_insert_new_table)
2556 : 0 : result = true;
2557 : 0 : break;
408 efujita@postgresql.o 2558 :CBC 32 : case CMD_UPDATE:
2559 [ + + ]: 32 : if (trigDesc &&
2560 [ - + ]: 4 : (trigDesc->trig_update_old_table ||
408 efujita@postgresql.o 2561 [ # # ]:UBC 0 : trigDesc->trig_update_new_table))
408 efujita@postgresql.o 2562 :CBC 4 : result = true;
2563 : 32 : break;
2564 : 20 : case CMD_DELETE:
2565 [ + + ]: 20 : if (trigDesc &&
2566 [ + - ]: 4 : trigDesc->trig_delete_old_table)
2567 : 4 : result = true;
2568 : 20 : break;
2569 : : /* There is no separate event for MERGE, only INSERT/UPDATE/DELETE */
408 efujita@postgresql.o 2570 :UBC 0 : case CMD_MERGE:
2571 : 0 : result = false;
1637 alvherre@alvh.no-ip. 2572 : 0 : break;
3838 rhaas@postgresql.org 2573 : 0 : default:
2574 [ # # ]: 0 : elog(ERROR, "unrecognized CmdType: %d", (int) event);
2575 : : break;
2576 : : }
2577 : :
2799 andres@anarazel.de 2578 :CBC 52 : table_close(relation, NoLock);
3838 rhaas@postgresql.org 2579 : 52 : return result;
2580 : : }
2581 : :
2582 : : /*
2583 : : * has_stored_generated_columns
2584 : : *
2585 : : * Does table identified by RTI have any STORED GENERATED columns?
2586 : : */
2587 : : bool
2731 peter@eisentraut.org 2588 : 224 : has_stored_generated_columns(PlannerInfo *root, Index rti)
2589 : : {
2590 [ + - ]: 224 : RangeTblEntry *rte = planner_rt_fetch(rti, root);
2591 : : Relation relation;
2592 : : TupleDesc tupdesc;
andres@anarazel.de 2593 : 224 : bool result = false;
2594 : :
2595 : : /* Assume we already have adequate lock */
2528 michael@paquier.xyz 2596 : 224 : relation = table_open(rte->relid, NoLock);
2597 : :
2731 peter@eisentraut.org 2598 : 224 : tupdesc = RelationGetDescr(relation);
2599 [ + + + + ]: 224 : result = tupdesc->constr && tupdesc->constr->has_generated_stored;
2600 : :
2528 michael@paquier.xyz 2601 : 224 : table_close(relation, NoLock);
2602 : :
2731 peter@eisentraut.org 2603 : 224 : return result;
2604 : : }
2605 : :
2606 : : /*
2607 : : * get_dependent_generated_columns
2608 : : *
2609 : : * Get the column numbers of any STORED GENERATED columns of the relation
2610 : : * that depend on any column listed in target_cols. Both the input and
2611 : : * result bitmapsets contain column numbers offset by
2612 : : * FirstLowInvalidHeapAttributeNumber.
2613 : : */
2614 : : Bitmapset *
1354 tgl@sss.pgh.pa.us 2615 : 47 : get_dependent_generated_columns(PlannerInfo *root, Index rti,
2616 : : Bitmapset *target_cols)
2617 : : {
2618 : 47 : Bitmapset *dependentCols = NULL;
2619 [ + - ]: 47 : RangeTblEntry *rte = planner_rt_fetch(rti, root);
2620 : : Relation relation;
2621 : : TupleDesc tupdesc;
2622 : : TupleConstr *constr;
2623 : :
2624 : : /* Assume we already have adequate lock */
2625 : 47 : relation = table_open(rte->relid, NoLock);
2626 : :
2627 : 47 : tupdesc = RelationGetDescr(relation);
2628 : 47 : constr = tupdesc->constr;
2629 : :
2630 [ + + + + ]: 47 : if (constr && constr->has_generated_stored)
2631 : : {
2632 [ + + ]: 6 : for (int i = 0; i < constr->num_defval; i++)
2633 : : {
2634 : 4 : AttrDefault *defval = &constr->defval[i];
2635 : : Node *expr;
2636 : 4 : Bitmapset *attrs_used = NULL;
2637 : :
2638 : : /* skip if not generated column */
333 drowley@postgresql.o 2639 [ - + ]: 4 : if (!TupleDescCompactAttr(tupdesc, defval->adnum - 1)->attgenerated)
1354 tgl@sss.pgh.pa.us 2640 :UBC 0 : continue;
2641 : :
2642 : : /* identify columns this generated column depends on */
1354 tgl@sss.pgh.pa.us 2643 :CBC 4 : expr = stringToNode(defval->adbin);
2644 : 4 : pull_varattnos(expr, 1, &attrs_used);
2645 : :
2646 [ + - ]: 4 : if (bms_overlap(target_cols, attrs_used))
2647 : 4 : dependentCols = bms_add_member(dependentCols,
2648 : 4 : defval->adnum - FirstLowInvalidHeapAttributeNumber);
2649 : : }
2650 : : }
2651 : :
2652 : 47 : table_close(relation, NoLock);
2653 : :
2654 : 47 : return dependentCols;
2655 : : }
2656 : :
2657 : : /*
2658 : : * set_relation_partition_info
2659 : : *
2660 : : * Set partitioning scheme and related information for a partitioned table.
2661 : : */
2662 : : static void
3287 rhaas@postgresql.org 2663 : 13769 : set_relation_partition_info(PlannerInfo *root, RelOptInfo *rel,
2664 : : Relation relation)
2665 : : {
2666 : : PartitionDesc partdesc;
2667 : :
2668 : : /*
2669 : : * Create the PartitionDirectory infrastructure if we didn't already.
2670 : : */
2731 tgl@sss.pgh.pa.us 2671 [ + + ]: 13769 : if (root->glob->partition_directory == NULL)
2672 : : {
2673 : 8799 : root->glob->partition_directory =
1977 alvherre@alvh.no-ip. 2674 : 8799 : CreatePartitionDirectory(CurrentMemoryContext, true);
2675 : : }
2676 : :
2754 rhaas@postgresql.org 2677 : 13769 : partdesc = PartitionDirectoryLookup(root->glob->partition_directory,
2678 : : relation);
3287 2679 : 13769 : rel->part_scheme = find_partition_scheme(root, relation);
2680 [ + - - + ]: 13769 : Assert(partdesc != NULL && rel->part_scheme != NULL);
2739 tgl@sss.pgh.pa.us 2681 : 13769 : rel->boundinfo = partdesc->boundinfo;
3287 rhaas@postgresql.org 2682 : 13769 : rel->nparts = partdesc->nparts;
3271 2683 : 13769 : set_baserel_partition_key_exprs(relation, rel);
2595 alvherre@alvh.no-ip. 2684 : 13769 : set_baserel_partition_constraint(relation, rel);
3287 rhaas@postgresql.org 2685 : 13769 : }
2686 : :
2687 : : /*
2688 : : * find_partition_scheme
2689 : : *
2690 : : * Find or create a PartitionScheme for this Relation.
2691 : : */
2692 : : static PartitionScheme
2693 : 13769 : find_partition_scheme(PlannerInfo *root, Relation relation)
2694 : : {
2695 : 13769 : PartitionKey partkey = RelationGetPartitionKey(relation);
2696 : : ListCell *lc;
2697 : : int partnatts,
2698 : : i;
2699 : : PartitionScheme part_scheme;
2700 : :
2701 : : /* A partitioned table should have a partition key. */
2702 [ - + ]: 13769 : Assert(partkey != NULL);
2703 : :
2704 : 13769 : partnatts = partkey->partnatts;
2705 : :
2706 : : /* Search for a matching partition scheme and return if found one. */
2707 [ + + + + : 15357 : foreach(lc, root->part_schemes)
+ + ]
2708 : : {
2709 : 5466 : part_scheme = lfirst(lc);
2710 : :
2711 : : /* Match partitioning strategy and number of keys. */
2712 [ + + ]: 5466 : if (partkey->strategy != part_scheme->strategy ||
2713 [ + + ]: 4628 : partnatts != part_scheme->partnatts)
2714 : 1213 : continue;
2715 : :
2716 : : /* Match partition key type properties. */
2717 [ + + ]: 4253 : if (memcmp(partkey->partopfamily, part_scheme->partopfamily,
2718 : 3878 : sizeof(Oid) * partnatts) != 0 ||
2719 [ + - ]: 3878 : memcmp(partkey->partopcintype, part_scheme->partopcintype,
2720 : 3878 : sizeof(Oid) * partnatts) != 0 ||
3126 2721 [ - + ]: 3878 : memcmp(partkey->partcollation, part_scheme->partcollation,
2722 : : sizeof(Oid) * partnatts) != 0)
3287 2723 : 375 : continue;
2724 : :
2725 : : /*
2726 : : * Length and byval information should match when partopcintype
2727 : : * matches.
2728 : : */
2729 [ - + ]: 3878 : Assert(memcmp(partkey->parttyplen, part_scheme->parttyplen,
2730 : : sizeof(int16) * partnatts) == 0);
2731 [ - + ]: 3878 : Assert(memcmp(partkey->parttypbyval, part_scheme->parttypbyval,
2732 : : sizeof(bool) * partnatts) == 0);
2733 : :
2734 : : /*
2735 : : * If partopfamily and partopcintype matched, must have the same
2736 : : * partition comparison functions. Note that we cannot reliably
2737 : : * Assert the equality of function structs themselves for they might
2738 : : * be different across PartitionKey's, so just Assert for the function
2739 : : * OIDs.
2740 : : */
2741 : : #ifdef USE_ASSERT_CHECKING
3089 alvherre@alvh.no-ip. 2742 [ + + ]: 7781 : for (i = 0; i < partkey->partnatts; i++)
2743 [ - + ]: 3903 : Assert(partkey->partsupfunc[i].fn_oid ==
2744 : : part_scheme->partsupfunc[i].fn_oid);
2745 : : #endif
2746 : :
2747 : : /* Found matching partition scheme. */
3287 rhaas@postgresql.org 2748 : 3878 : return part_scheme;
2749 : : }
2750 : :
2751 : : /*
2752 : : * Did not find matching partition scheme. Create one copying relevant
2753 : : * information from the relcache. We need to copy the contents of the
2754 : : * array since the relcache entry may not survive after we have closed the
2755 : : * relation.
2756 : : */
284 michael@paquier.xyz 2757 : 9891 : part_scheme = palloc0_object(PartitionSchemeData);
3287 rhaas@postgresql.org 2758 : 9891 : part_scheme->strategy = partkey->strategy;
2759 : 9891 : part_scheme->partnatts = partkey->partnatts;
2760 : :
284 michael@paquier.xyz 2761 : 9891 : part_scheme->partopfamily = palloc_array(Oid, partnatts);
3271 rhaas@postgresql.org 2762 : 9891 : memcpy(part_scheme->partopfamily, partkey->partopfamily,
2763 : : sizeof(Oid) * partnatts);
2764 : :
284 michael@paquier.xyz 2765 : 9891 : part_scheme->partopcintype = palloc_array(Oid, partnatts);
3271 rhaas@postgresql.org 2766 : 9891 : memcpy(part_scheme->partopcintype, partkey->partopcintype,
2767 : : sizeof(Oid) * partnatts);
2768 : :
284 michael@paquier.xyz 2769 : 9891 : part_scheme->partcollation = palloc_array(Oid, partnatts);
3126 rhaas@postgresql.org 2770 : 9891 : memcpy(part_scheme->partcollation, partkey->partcollation,
2771 : : sizeof(Oid) * partnatts);
2772 : :
284 michael@paquier.xyz 2773 : 9891 : part_scheme->parttyplen = palloc_array(int16, partnatts);
3271 rhaas@postgresql.org 2774 : 9891 : memcpy(part_scheme->parttyplen, partkey->parttyplen,
2775 : : sizeof(int16) * partnatts);
2776 : :
284 michael@paquier.xyz 2777 : 9891 : part_scheme->parttypbyval = palloc_array(bool, partnatts);
3271 rhaas@postgresql.org 2778 : 9891 : memcpy(part_scheme->parttypbyval, partkey->parttypbyval,
2779 : : sizeof(bool) * partnatts);
2780 : :
284 michael@paquier.xyz 2781 : 9891 : part_scheme->partsupfunc = palloc_array(FmgrInfo, partnatts);
3089 alvherre@alvh.no-ip. 2782 [ + + ]: 21377 : for (i = 0; i < partnatts; i++)
2783 : 11486 : fmgr_info_copy(&part_scheme->partsupfunc[i], &partkey->partsupfunc[i],
2784 : : CurrentMemoryContext);
2785 : :
2786 : : /* Add the partitioning scheme to PlannerInfo. */
3287 rhaas@postgresql.org 2787 : 9891 : root->part_schemes = lappend(root->part_schemes, part_scheme);
2788 : :
2789 : 9891 : return part_scheme;
2790 : : }
2791 : :
2792 : : /*
2793 : : * set_baserel_partition_key_exprs
2794 : : *
2795 : : * Builds partition key expressions for the given base relation and fills
2796 : : * rel->partexprs.
2797 : : */
2798 : : static void
3271 2799 : 13769 : set_baserel_partition_key_exprs(Relation relation,
2800 : : RelOptInfo *rel)
2801 : : {
3287 2802 : 13769 : PartitionKey partkey = RelationGetPartitionKey(relation);
2803 : : int partnatts;
2804 : : int cnt;
2805 : : List **partexprs;
2806 : : ListCell *lc;
3271 2807 : 13769 : Index varno = rel->relid;
2808 : :
2809 [ + + + - : 13769 : Assert(IS_SIMPLE_REL(rel) && rel->relid > 0);
- + ]
2810 : :
2811 : : /* A partitioned table should have a partition key. */
3287 2812 [ - + ]: 13769 : Assert(partkey != NULL);
2813 : :
2814 : 13769 : partnatts = partkey->partnatts;
284 michael@paquier.xyz 2815 : 13769 : partexprs = palloc_array(List *, partnatts);
3287 rhaas@postgresql.org 2816 : 13769 : lc = list_head(partkey->partexprs);
2817 : :
2818 [ + + ]: 29158 : for (cnt = 0; cnt < partnatts; cnt++)
2819 : : {
2820 : : Expr *partexpr;
2821 : 15389 : AttrNumber attno = partkey->partattrs[cnt];
2822 : :
2823 [ + + ]: 15389 : if (attno != InvalidAttrNumber)
2824 : : {
2825 : : /* Single column partition key is stored as a Var node. */
2826 [ - + ]: 14614 : Assert(attno > 0);
2827 : :
2828 : 14614 : partexpr = (Expr *) makeVar(varno, attno,
2829 : 14614 : partkey->parttypid[cnt],
2830 : 14614 : partkey->parttypmod[cnt],
2831 : 14614 : partkey->parttypcoll[cnt], 0);
2832 : : }
2833 : : else
2834 : : {
2835 [ - + ]: 775 : if (lc == NULL)
3287 rhaas@postgresql.org 2836 [ # # ]:UBC 0 : elog(ERROR, "wrong number of partition key expressions");
2837 : :
2838 : : /* Re-stamp the expression with given varno. */
3287 rhaas@postgresql.org 2839 :CBC 775 : partexpr = (Expr *) copyObject(lfirst(lc));
2840 : 775 : ChangeVarNodes((Node *) partexpr, 1, varno, 0);
2624 tgl@sss.pgh.pa.us 2841 : 775 : lc = lnext(partkey->partexprs, lc);
2842 : : }
2843 : :
2844 : : /* Base relations have a single expression per key. */
3287 rhaas@postgresql.org 2845 : 15389 : partexprs[cnt] = list_make1(partexpr);
2846 : : }
2847 : :
3271 2848 : 13769 : rel->partexprs = partexprs;
2849 : :
2850 : : /*
2851 : : * A base relation does not have nullable partition key expressions, since
2852 : : * no outer join is involved. We still allocate an array of empty
2853 : : * expression lists to keep partition key expression handling code simple.
2854 : : * See build_joinrel_partition_info() and match_expr_to_partition_keys().
2855 : : */
284 michael@paquier.xyz 2856 : 13769 : rel->nullable_partexprs = palloc0_array(List *, partnatts);
3287 rhaas@postgresql.org 2857 : 13769 : }
2858 : :
2859 : : /*
2860 : : * set_baserel_partition_constraint
2861 : : *
2862 : : * Builds the partition constraint for the given base relation and sets it
2863 : : * in the given RelOptInfo. All Var nodes are restamped with the relid of the
2864 : : * given relation.
2865 : : */
2866 : : static void
2595 alvherre@alvh.no-ip. 2867 : 13779 : set_baserel_partition_constraint(Relation relation, RelOptInfo *rel)
2868 : : {
2869 : : List *partconstr;
2870 : :
2871 [ - + ]: 13779 : if (rel->partition_qual) /* already done */
2595 alvherre@alvh.no-ip. 2872 :UBC 0 : return;
2873 : :
2874 : : /*
2875 : : * Run the partition quals through const-simplification similar to check
2876 : : * constraints. We skip canonicalize_qual, though, because partition
2877 : : * quals should be in canonical form already; also, since the qual is in
2878 : : * implicit-AND format, we'd have to explicitly convert it to explicit-AND
2879 : : * format and back again.
2880 : : */
2595 alvherre@alvh.no-ip. 2881 :CBC 13779 : partconstr = RelationGetPartitionQual(relation);
2882 [ + + ]: 13779 : if (partconstr)
2883 : : {
2884 : 3109 : partconstr = (List *) expression_planner((Expr *) partconstr);
2885 [ + + ]: 3109 : if (rel->relid != 1)
2886 : 3044 : ChangeVarNodes((Node *) partconstr, 1, rel->relid, 0);
2887 : 3109 : rel->partition_qual = partconstr;
2888 : : }
2889 : : }
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