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partbounds.c
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1 /*-------------------------------------------------------------------------
2  *
3  * partbounds.c
4  * Support routines for manipulating partition bounds
5  *
6  * Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
7  * Portions Copyright (c) 1994, Regents of the University of California
8  *
9  * IDENTIFICATION
10  * src/backend/partitioning/partbounds.c
11  *
12  *-------------------------------------------------------------------------
13  */
14 
15 #include "postgres.h"
16 
17 #include "access/relation.h"
18 #include "access/table.h"
19 #include "access/tableam.h"
20 #include "catalog/partition.h"
21 #include "catalog/pg_inherits.h"
22 #include "catalog/pg_type.h"
23 #include "commands/tablecmds.h"
24 #include "common/hashfn.h"
25 #include "executor/executor.h"
26 #include "miscadmin.h"
27 #include "nodes/makefuncs.h"
28 #include "nodes/nodeFuncs.h"
29 #include "nodes/pathnodes.h"
30 #include "parser/parse_coerce.h"
31 #include "partitioning/partbounds.h"
32 #include "partitioning/partdesc.h"
33 #include "partitioning/partprune.h"
34 #include "utils/array.h"
35 #include "utils/builtins.h"
36 #include "utils/datum.h"
37 #include "utils/fmgroids.h"
38 #include "utils/lsyscache.h"
39 #include "utils/partcache.h"
40 #include "utils/ruleutils.h"
41 #include "utils/snapmgr.h"
42 #include "utils/syscache.h"
43 
44 /*
45  * When qsort'ing partition bounds after reading from the catalog, each bound
46  * is represented with one of the following structs.
47  */
48 
49 /* One bound of a hash partition */
50 typedef struct PartitionHashBound
51 {
52  int modulus;
53  int remainder;
54  int index;
55 } PartitionHashBound;
56 
57 /* One value coming from some (index'th) list partition */
58 typedef struct PartitionListValue
59 {
60  int index;
61  Datum value;
62 } PartitionListValue;
63 
64 /* One bound of a range partition */
65 typedef struct PartitionRangeBound
66 {
67  int index;
68  Datum *datums; /* range bound datums */
69  PartitionRangeDatumKind *kind; /* the kind of each datum */
70  bool lower; /* this is the lower (vs upper) bound */
71 } PartitionRangeBound;
72 
73 /*
74  * Mapping from partitions of a joining relation to partitions of a join
75  * relation being computed (a.k.a merged partitions)
76  */
77 typedef struct PartitionMap
78 {
79  int nparts; /* number of partitions */
80  int *merged_indexes; /* indexes of merged partitions */
81  bool *merged; /* flags to indicate whether partitions are
82  * merged with non-dummy partitions */
83  bool did_remapping; /* did we re-map partitions? */
84  int *old_indexes; /* old indexes of merged partitions if
85  * did_remapping */
86 } PartitionMap;
87 
88 /* Macro for comparing two range bounds */
89 #define compare_range_bounds(partnatts, partsupfunc, partcollations, \
90  bound1, bound2) \
91  (partition_rbound_cmp(partnatts, partsupfunc, partcollations, \
92  (bound1)->datums, (bound1)->kind, (bound1)->lower, \
93  bound2))
94 
95 static int32 qsort_partition_hbound_cmp(const void *a, const void *b);
96 static int32 qsort_partition_list_value_cmp(const void *a, const void *b,
97  void *arg);
98 static int32 qsort_partition_rbound_cmp(const void *a, const void *b,
99  void *arg);
100 static PartitionBoundInfo create_hash_bounds(PartitionBoundSpec **boundspecs,
101  int nparts, PartitionKey key, int **mapping);
102 static PartitionBoundInfo create_list_bounds(PartitionBoundSpec **boundspecs,
103  int nparts, PartitionKey key, int **mapping);
104 static PartitionBoundInfo create_range_bounds(PartitionBoundSpec **boundspecs,
105  int nparts, PartitionKey key, int **mapping);
106 static PartitionBoundInfo merge_list_bounds(FmgrInfo *partsupfunc,
107  Oid *partcollation,
108  RelOptInfo *outer_rel,
109  RelOptInfo *inner_rel,
110  JoinType jointype,
111  List **outer_parts,
112  List **inner_parts);
113 static PartitionBoundInfo merge_range_bounds(int partnatts,
114  FmgrInfo *partsupfuncs,
115  Oid *partcollations,
116  RelOptInfo *outer_rel,
117  RelOptInfo *inner_rel,
118  JoinType jointype,
119  List **outer_parts,
120  List **inner_parts);
121 static void init_partition_map(RelOptInfo *rel, PartitionMap *map);
122 static void free_partition_map(PartitionMap *map);
123 static bool is_dummy_partition(RelOptInfo *rel, int part_index);
124 static int merge_matching_partitions(PartitionMap *outer_map,
125  PartitionMap *inner_map,
126  int outer_index,
127  int inner_index,
128  int *next_index);
129 static int process_outer_partition(PartitionMap *outer_map,
130  PartitionMap *inner_map,
131  bool outer_has_default,
132  bool inner_has_default,
133  int outer_index,
134  int inner_default,
135  JoinType jointype,
136  int *next_index,
137  int *default_index);
138 static int process_inner_partition(PartitionMap *outer_map,
139  PartitionMap *inner_map,
140  bool outer_has_default,
141  bool inner_has_default,
142  int inner_index,
143  int outer_default,
144  JoinType jointype,
145  int *next_index,
146  int *default_index);
147 static void merge_null_partitions(PartitionMap *outer_map,
148  PartitionMap *inner_map,
149  bool outer_has_null,
150  bool inner_has_null,
151  int outer_null,
152  int inner_null,
153  JoinType jointype,
154  int *next_index,
155  int *null_index);
156 static void merge_default_partitions(PartitionMap *outer_map,
157  PartitionMap *inner_map,
158  bool outer_has_default,
159  bool inner_has_default,
160  int outer_default,
161  int inner_default,
162  JoinType jointype,
163  int *next_index,
164  int *default_index);
165 static int merge_partition_with_dummy(PartitionMap *map, int index,
166  int *next_index);
167 static void fix_merged_indexes(PartitionMap *outer_map,
168  PartitionMap *inner_map,
169  int nmerged, List *merged_indexes);
170 static void generate_matching_part_pairs(RelOptInfo *outer_rel,
171  RelOptInfo *inner_rel,
172  PartitionMap *outer_map,
173  PartitionMap *inner_map,
174  int nmerged,
175  List **outer_parts,
176  List **inner_parts);
177 static PartitionBoundInfo build_merged_partition_bounds(char strategy,
178  List *merged_datums,
179  List *merged_kinds,
180  List *merged_indexes,
181  int null_index,
182  int default_index);
183 static int get_range_partition(RelOptInfo *rel,
184  PartitionBoundInfo bi,
185  int *lb_pos,
186  PartitionRangeBound *lb,
187  PartitionRangeBound *ub);
188 static int get_range_partition_internal(PartitionBoundInfo bi,
189  int *lb_pos,
190  PartitionRangeBound *lb,
191  PartitionRangeBound *ub);
192 static bool compare_range_partitions(int partnatts, FmgrInfo *partsupfuncs,
193  Oid *partcollations,
194  PartitionRangeBound *outer_lb,
195  PartitionRangeBound *outer_ub,
196  PartitionRangeBound *inner_lb,
197  PartitionRangeBound *inner_ub,
198  int *lb_cmpval, int *ub_cmpval);
199 static void get_merged_range_bounds(int partnatts, FmgrInfo *partsupfuncs,
200  Oid *partcollations, JoinType jointype,
201  PartitionRangeBound *outer_lb,
202  PartitionRangeBound *outer_ub,
203  PartitionRangeBound *inner_lb,
204  PartitionRangeBound *inner_ub,
205  int lb_cmpval, int ub_cmpval,
206  PartitionRangeBound *merged_lb,
207  PartitionRangeBound *merged_ub);
208 static void add_merged_range_bounds(int partnatts, FmgrInfo *partsupfuncs,
209  Oid *partcollations,
210  PartitionRangeBound *merged_lb,
211  PartitionRangeBound *merged_ub,
212  int merged_index,
213  List **merged_datums,
214  List **merged_kinds,
215  List **merged_indexes);
216 static PartitionRangeBound *make_one_partition_rbound(PartitionKey key, int index,
217  List *datums, bool lower);
218 static int32 partition_hbound_cmp(int modulus1, int remainder1, int modulus2,
219  int remainder2);
220 static int32 partition_rbound_cmp(int partnatts, FmgrInfo *partsupfunc,
221  Oid *partcollation, Datum *datums1,
222  PartitionRangeDatumKind *kind1, bool lower1,
223  PartitionRangeBound *b2);
224 static int partition_range_bsearch(int partnatts, FmgrInfo *partsupfunc,
225  Oid *partcollation,
226  PartitionBoundInfo boundinfo,
227  PartitionRangeBound *probe, int32 *cmpval);
228 static Expr *make_partition_op_expr(PartitionKey key, int keynum,
229  uint16 strategy, Expr *arg1, Expr *arg2);
230 static Oid get_partition_operator(PartitionKey key, int col,
231  StrategyNumber strategy, bool *need_relabel);
232 static List *get_qual_for_hash(Relation parent, PartitionBoundSpec *spec);
233 static List *get_qual_for_list(Relation parent, PartitionBoundSpec *spec);
234 static List *get_qual_for_range(Relation parent, PartitionBoundSpec *spec,
235  bool for_default);
236 static void get_range_key_properties(PartitionKey key, int keynum,
237  PartitionRangeDatum *ldatum,
238  PartitionRangeDatum *udatum,
239  ListCell **partexprs_item,
240  Expr **keyCol,
241  Const **lower_val, Const **upper_val);
242 static List *get_range_nulltest(PartitionKey key);
243 
244 /*
245  * get_qual_from_partbound
246  * Given a parser node for partition bound, return the list of executable
247  * expressions as partition constraint
248  */
249 List *
250 get_qual_from_partbound(Relation parent, PartitionBoundSpec *spec)
251 {
252  PartitionKey key = RelationGetPartitionKey(parent);
253  List *my_qual = NIL;
254 
255  Assert(key != NULL);
256 
257  switch (key->strategy)
258  {
259  case PARTITION_STRATEGY_HASH:
260  Assert(spec->strategy == PARTITION_STRATEGY_HASH);
261  my_qual = get_qual_for_hash(parent, spec);
262  break;
263 
264  case PARTITION_STRATEGY_LIST:
265  Assert(spec->strategy == PARTITION_STRATEGY_LIST);
266  my_qual = get_qual_for_list(parent, spec);
267  break;
268 
269  case PARTITION_STRATEGY_RANGE:
270  Assert(spec->strategy == PARTITION_STRATEGY_RANGE);
271  my_qual = get_qual_for_range(parent, spec, false);
272  break;
273  }
274 
275  return my_qual;
276 }
277 
278 /*
279  * partition_bounds_create
280  * Build a PartitionBoundInfo struct from a list of PartitionBoundSpec
281  * nodes
282  *
283  * This function creates a PartitionBoundInfo and fills the values of its
284  * various members based on the input list. Importantly, 'datums' array will
285  * contain Datum representation of individual bounds (possibly after
286  * de-duplication as in case of range bounds), sorted in a canonical order
287  * defined by qsort_partition_* functions of respective partitioning methods.
288  * 'indexes' array will contain as many elements as there are bounds (specific
289  * exceptions to this rule are listed in the function body), which represent
290  * the 0-based canonical positions of partitions.
291  *
292  * Upon return from this function, *mapping is set to an array of
293  * list_length(boundspecs) elements, each of which maps the original index of
294  * a partition to its canonical index.
295  *
296  * Note: The objects returned by this function are wholly allocated in the
297  * current memory context.
298  */
299 PartitionBoundInfo
300 partition_bounds_create(PartitionBoundSpec **boundspecs, int nparts,
301  PartitionKey key, int **mapping)
302 {
303  int i;
304 
305  Assert(nparts > 0);
306 
307  /*
308  * For each partitioning method, we first convert the partition bounds
309  * from their parser node representation to the internal representation,
310  * along with any additional preprocessing (such as de-duplicating range
311  * bounds). Resulting bound datums are then added to the 'datums' array
312  * in PartitionBoundInfo. For each datum added, an integer indicating the
313  * canonical partition index is added to the 'indexes' array.
314  *
315  * For each bound, we remember its partition's position (0-based) in the
316  * original list to later map it to the canonical index.
317  */
318 
319  /*
320  * Initialize mapping array with invalid values, this is filled within
321  * each sub-routine below depending on the bound type.
322  */
323  *mapping = (int *) palloc(sizeof(int) * nparts);
324  for (i = 0; i < nparts; i++)
325  (*mapping)[i] = -1;
326 
327  switch (key->strategy)
328  {
329  case PARTITION_STRATEGY_HASH:
330  return create_hash_bounds(boundspecs, nparts, key, mapping);
331 
332  case PARTITION_STRATEGY_LIST:
333  return create_list_bounds(boundspecs, nparts, key, mapping);
334 
335  case PARTITION_STRATEGY_RANGE:
336  return create_range_bounds(boundspecs, nparts, key, mapping);
337  }
338 
339  Assert(false);
340  return NULL; /* keep compiler quiet */
341 }
342 
343 /*
344  * create_hash_bounds
345  * Create a PartitionBoundInfo for a hash partitioned table
346  */
347 static PartitionBoundInfo
348 create_hash_bounds(PartitionBoundSpec **boundspecs, int nparts,
349  PartitionKey key, int **mapping)
350 {
351  PartitionBoundInfo boundinfo;
352  PartitionHashBound *hbounds;
353  int i;
354  int greatest_modulus;
355  Datum *boundDatums;
356 
357  boundinfo = (PartitionBoundInfoData *)
358  palloc0(sizeof(PartitionBoundInfoData));
359  boundinfo->strategy = key->strategy;
360  /* No special hash partitions. */
361  boundinfo->null_index = -1;
362  boundinfo->default_index = -1;
363 
364  hbounds = (PartitionHashBound *)
365  palloc(nparts * sizeof(PartitionHashBound));
366 
367  /* Convert from node to the internal representation */
368  for (i = 0; i < nparts; i++)
369  {
370  PartitionBoundSpec *spec = boundspecs[i];
371 
372  if (spec->strategy != PARTITION_STRATEGY_HASH)
373  elog(ERROR, "invalid strategy in partition bound spec");
374 
375  hbounds[i].modulus = spec->modulus;
376  hbounds[i].remainder = spec->remainder;
377  hbounds[i].index = i;
378  }
379 
380  /* Sort all the bounds in ascending order */
381  qsort(hbounds, nparts, sizeof(PartitionHashBound),
382  qsort_partition_hbound_cmp);
383 
384  /* After sorting, moduli are now stored in ascending order. */
385  greatest_modulus = hbounds[nparts - 1].modulus;
386 
387  boundinfo->ndatums = nparts;
388  boundinfo->datums = (Datum **) palloc0(nparts * sizeof(Datum *));
389  boundinfo->kind = NULL;
390  boundinfo->interleaved_parts = NULL;
391  boundinfo->nindexes = greatest_modulus;
392  boundinfo->indexes = (int *) palloc(greatest_modulus * sizeof(int));
393  for (i = 0; i < greatest_modulus; i++)
394  boundinfo->indexes[i] = -1;
395 
396  /*
397  * In the loop below, to save from allocating a series of small datum
398  * arrays, here we just allocate a single array and below we'll just
399  * assign a portion of this array per partition.
400  */
401  boundDatums = (Datum *) palloc(nparts * 2 * sizeof(Datum));
402 
403  /*
404  * For hash partitioning, there are as many datums (modulus and remainder
405  * pairs) as there are partitions. Indexes are simply values ranging from
406  * 0 to (nparts - 1).
407  */
408  for (i = 0; i < nparts; i++)
409  {
410  int modulus = hbounds[i].modulus;
411  int remainder = hbounds[i].remainder;
412 
413  boundinfo->datums[i] = &boundDatums[i * 2];
414  boundinfo->datums[i][0] = Int32GetDatum(modulus);
415  boundinfo->datums[i][1] = Int32GetDatum(remainder);
416 
417  while (remainder < greatest_modulus)
418  {
419  /* overlap? */
420  Assert(boundinfo->indexes[remainder] == -1);
421  boundinfo->indexes[remainder] = i;
422  remainder += modulus;
423  }
424 
425  (*mapping)[hbounds[i].index] = i;
426  }
427  pfree(hbounds);
428 
429  return boundinfo;
430 }
431 
432 /*
433  * get_non_null_list_datum_count
434  * Counts the number of non-null Datums in each partition.
435  */
436 static int
437 get_non_null_list_datum_count(PartitionBoundSpec **boundspecs, int nparts)
438 {
439  int i;
440  int count = 0;
441 
442  for (i = 0; i < nparts; i++)
443  {
444  ListCell *lc;
445 
446  foreach(lc, boundspecs[i]->listdatums)
447  {
448  Const *val = lfirst_node(Const, lc);
449 
450  if (!val->constisnull)
451  count++;
452  }
453  }
454 
455  return count;
456 }
457 
458 /*
459  * create_list_bounds
460  * Create a PartitionBoundInfo for a list partitioned table
461  */
462 static PartitionBoundInfo
463 create_list_bounds(PartitionBoundSpec **boundspecs, int nparts,
464  PartitionKey key, int **mapping)
465 {
466  PartitionBoundInfo boundinfo;
467  PartitionListValue *all_values;
468  int i;
469  int j;
470  int ndatums;
471  int next_index = 0;
472  int default_index = -1;
473  int null_index = -1;
474  Datum *boundDatums;
475 
476  boundinfo = (PartitionBoundInfoData *)
477  palloc0(sizeof(PartitionBoundInfoData));
478  boundinfo->strategy = key->strategy;
479  /* Will be set correctly below. */
480  boundinfo->null_index = -1;
481  boundinfo->default_index = -1;
482 
483  ndatums = get_non_null_list_datum_count(boundspecs, nparts);
484  all_values = (PartitionListValue *)
485  palloc(ndatums * sizeof(PartitionListValue));
486 
487  /* Create a unified list of non-null values across all partitions. */
488  for (j = 0, i = 0; i < nparts; i++)
489  {
490  PartitionBoundSpec *spec = boundspecs[i];
491  ListCell *c;
492 
493  if (spec->strategy != PARTITION_STRATEGY_LIST)
494  elog(ERROR, "invalid strategy in partition bound spec");
495 
496  /*
497  * Note the index of the partition bound spec for the default
498  * partition. There's no datum to add to the list on non-null datums
499  * for this partition.
500  */
501  if (spec->is_default)
502  {
503  default_index = i;
504  continue;
505  }
506 
507  foreach(c, spec->listdatums)
508  {
509  Const *val = lfirst_node(Const, c);
510 
511  if (!val->constisnull)
512  {
513  all_values[j].index = i;
514  all_values[j].value = val->constvalue;
515  j++;
516  }
517  else
518  {
519  /*
520  * Never put a null into the values array; save the index of
521  * the partition that stores nulls, instead.
522  */
523  if (null_index != -1)
524  elog(ERROR, "found null more than once");
525  null_index = i;
526  }
527  }
528  }
529 
530  /* ensure we found a Datum for every slot in the all_values array */
531  Assert(j == ndatums);
532 
533  qsort_arg(all_values, ndatums, sizeof(PartitionListValue),
534  qsort_partition_list_value_cmp, key);
535 
536  boundinfo->ndatums = ndatums;
537  boundinfo->datums = (Datum **) palloc0(ndatums * sizeof(Datum *));
538  boundinfo->kind = NULL;
539  boundinfo->interleaved_parts = NULL;
540  boundinfo->nindexes = ndatums;
541  boundinfo->indexes = (int *) palloc(ndatums * sizeof(int));
542 
543  /*
544  * In the loop below, to save from allocating a series of small datum
545  * arrays, here we just allocate a single array and below we'll just
546  * assign a portion of this array per datum.
547  */
548  boundDatums = (Datum *) palloc(ndatums * sizeof(Datum));
549 
550  /*
551  * Copy values. Canonical indexes are values ranging from 0 to (nparts -
552  * 1) assigned to each partition such that all datums of a given partition
553  * receive the same value. The value for a given partition is the index of
554  * that partition's smallest datum in the all_values[] array.
555  */
556  for (i = 0; i < ndatums; i++)
557  {
558  int orig_index = all_values[i].index;
559 
560  boundinfo->datums[i] = &boundDatums[i];
561  boundinfo->datums[i][0] = datumCopy(all_values[i].value,
562  key->parttypbyval[0],
563  key->parttyplen[0]);
564 
565  /* If the old index has no mapping, assign one */
566  if ((*mapping)[orig_index] == -1)
567  (*mapping)[orig_index] = next_index++;
568 
569  boundinfo->indexes[i] = (*mapping)[orig_index];
570  }
571 
572  pfree(all_values);
573 
574  /*
575  * Set the canonical value for null_index, if any.
576  *
577  * It is possible that the null-accepting partition has not been assigned
578  * an index yet, which could happen if such partition accepts only null
579  * and hence not handled in the above loop which only looked at non-null
580  * values.
581  */
582  if (null_index != -1)
583  {
584  Assert(null_index >= 0);
585  if ((*mapping)[null_index] == -1)
586  (*mapping)[null_index] = next_index++;
587  boundinfo->null_index = (*mapping)[null_index];
588  }
589 
590  /* Set the canonical value for default_index, if any. */
591  if (default_index != -1)
592  {
593  /*
594  * The default partition accepts any value not specified in the lists
595  * of other partitions, hence it should not get mapped index while
596  * assigning those for non-null datums.
597  */
598  Assert(default_index >= 0);
599  Assert((*mapping)[default_index] == -1);
600  (*mapping)[default_index] = next_index++;
601  boundinfo->default_index = (*mapping)[default_index];
602  }
603 
604  /*
605  * Calculate interleaved partitions. Here we look for partitions which
606  * might be interleaved with other partitions and set a bit in
607  * interleaved_parts for any partitions which may be interleaved with
608  * another partition.
609  */
610 
611  /*
612  * There must be multiple partitions to have any interleaved partitions,
613  * otherwise there's nothing to interleave with.
614  */
615  if (nparts > 1)
616  {
617  /*
618  * Short-circuit check to see if only 1 Datum is allowed per
619  * partition. When this is true there's no need to do the more
620  * expensive checks to look for interleaved values.
621  */
622  if (boundinfo->ndatums +
623  partition_bound_accepts_nulls(boundinfo) +
624  partition_bound_has_default(boundinfo) != nparts)
625  {
626  int last_index = -1;
627 
628  /*
629  * Since the indexes array is sorted in Datum order, if any
630  * partitions are interleaved then it will show up by the
631  * partition indexes not being in ascending order. Here we check
632  * for that and record all partitions that are out of order.
633  */
634  for (i = 0; i < boundinfo->nindexes; i++)
635  {
636  int index = boundinfo->indexes[i];
637 
638  if (index < last_index)
639  boundinfo->interleaved_parts = bms_add_member(boundinfo->interleaved_parts,
640  index);
641 
642  /*
643  * Otherwise, if the null_index exists in the indexes array,
644  * then the NULL partition must also allow some other Datum,
645  * therefore it's "interleaved".
646  */
647  else if (partition_bound_accepts_nulls(boundinfo) &&
648  index == boundinfo->null_index)
649  boundinfo->interleaved_parts = bms_add_member(boundinfo->interleaved_parts,
650  index);
651 
652  last_index = index;
653  }
654  }
655 
656  /*
657  * The DEFAULT partition is the "catch-all" partition that can contain
658  * anything that does not belong to any other partition. If there are
659  * any other partitions then the DEFAULT partition must be marked as
660  * interleaved.
661  */
662  if (partition_bound_has_default(boundinfo))
663  boundinfo->interleaved_parts = bms_add_member(boundinfo->interleaved_parts,
664  boundinfo->default_index);
665  }
666 
667 
668  /* All partitions must now have been assigned canonical indexes. */
669  Assert(next_index == nparts);
670  return boundinfo;
671 }
672 
673 /*
674  * create_range_bounds
675  * Create a PartitionBoundInfo for a range partitioned table
676  */
677 static PartitionBoundInfo
678 create_range_bounds(PartitionBoundSpec **boundspecs, int nparts,
679  PartitionKey key, int **mapping)
680 {
681  PartitionBoundInfo boundinfo;
682  PartitionRangeBound **rbounds = NULL;
683  PartitionRangeBound **all_bounds,
684  *prev;
685  int i,
686  k,
687  partnatts;
688  int ndatums = 0;
689  int default_index = -1;
690  int next_index = 0;
691  Datum *boundDatums;
692  PartitionRangeDatumKind *boundKinds;
693 
694  boundinfo = (PartitionBoundInfoData *)
695  palloc0(sizeof(PartitionBoundInfoData));
696  boundinfo->strategy = key->strategy;
697  /* There is no special null-accepting range partition. */
698  boundinfo->null_index = -1;
699  /* Will be set correctly below. */
700  boundinfo->default_index = -1;
701 
702  all_bounds = (PartitionRangeBound **)
703  palloc0(2 * nparts * sizeof(PartitionRangeBound *));
704 
705  /* Create a unified list of range bounds across all the partitions. */
706  ndatums = 0;
707  for (i = 0; i < nparts; i++)
708  {
709  PartitionBoundSpec *spec = boundspecs[i];
710  PartitionRangeBound *lower,
711  *upper;
712 
713  if (spec->strategy != PARTITION_STRATEGY_RANGE)
714  elog(ERROR, "invalid strategy in partition bound spec");
715 
716  /*
717  * Note the index of the partition bound spec for the default
718  * partition. There's no datum to add to the all_bounds array for
719  * this partition.
720  */
721  if (spec->is_default)
722  {
723  default_index = i;
724  continue;
725  }
726 
727  lower = make_one_partition_rbound(key, i, spec->lowerdatums, true);
728  upper = make_one_partition_rbound(key, i, spec->upperdatums, false);
729  all_bounds[ndatums++] = lower;
730  all_bounds[ndatums++] = upper;
731  }
732 
733  Assert(ndatums == nparts * 2 ||
734  (default_index != -1 && ndatums == (nparts - 1) * 2));
735 
736  /* Sort all the bounds in ascending order */
737  qsort_arg(all_bounds, ndatums,
738  sizeof(PartitionRangeBound *),
739  qsort_partition_rbound_cmp,
740  key);
741 
742  /* Save distinct bounds from all_bounds into rbounds. */
743  rbounds = (PartitionRangeBound **)
744  palloc(ndatums * sizeof(PartitionRangeBound *));
745  k = 0;
746  prev = NULL;
747  for (i = 0; i < ndatums; i++)
748  {
749  PartitionRangeBound *cur = all_bounds[i];
750  bool is_distinct = false;
751  int j;
752 
753  /* Is the current bound distinct from the previous one? */
754  for (j = 0; j < key->partnatts; j++)
755  {
756  Datum cmpval;
757 
758  if (prev == NULL || cur->kind[j] != prev->kind[j])
759  {
760  is_distinct = true;
761  break;
762  }
763 
764  /*
765  * If the bounds are both MINVALUE or MAXVALUE, stop now and treat
766  * them as equal, since any values after this point must be
767  * ignored.
768  */
769  if (cur->kind[j] != PARTITION_RANGE_DATUM_VALUE)
770  break;
771 
772  cmpval = FunctionCall2Coll(&key->partsupfunc[j],
773  key->partcollation[j],
774  cur->datums[j],
775  prev->datums[j]);
776  if (DatumGetInt32(cmpval) != 0)
777  {
778  is_distinct = true;
779  break;
780  }
781  }
782 
783  /*
784  * Only if the bound is distinct save it into a temporary array, i.e,
785  * rbounds which is later copied into boundinfo datums array.
786  */
787  if (is_distinct)
788  rbounds[k++] = all_bounds[i];
789 
790  prev = cur;
791  }
792 
793  pfree(all_bounds);
794 
795  /* Update ndatums to hold the count of distinct datums. */
796  ndatums = k;
797 
798  /*
799  * Add datums to boundinfo. Canonical indexes are values ranging from 0
800  * to nparts - 1, assigned in that order to each partition's upper bound.
801  * For 'datums' elements that are lower bounds, there is -1 in the
802  * 'indexes' array to signify that no partition exists for the values less
803  * than such a bound and greater than or equal to the previous upper
804  * bound.
805  */
806  boundinfo->ndatums = ndatums;
807  boundinfo->datums = (Datum **) palloc0(ndatums * sizeof(Datum *));
808  boundinfo->kind = (PartitionRangeDatumKind **)
809  palloc(ndatums *
810  sizeof(PartitionRangeDatumKind *));
811  boundinfo->interleaved_parts = NULL;
812 
813  /*
814  * For range partitioning, an additional value of -1 is stored as the last
815  * element of the indexes[] array.
816  */
817  boundinfo->nindexes = ndatums + 1;
818  boundinfo->indexes = (int *) palloc((ndatums + 1) * sizeof(int));
819 
820  /*
821  * In the loop below, to save from allocating a series of small arrays,
822  * here we just allocate a single array for Datums and another for
823  * PartitionRangeDatumKinds, below we'll just assign a portion of these
824  * arrays in each loop.
825  */
826  partnatts = key->partnatts;
827  boundDatums = (Datum *) palloc(ndatums * partnatts * sizeof(Datum));
828  boundKinds = (PartitionRangeDatumKind *) palloc(ndatums * partnatts *
829  sizeof(PartitionRangeDatumKind));
830 
831  for (i = 0; i < ndatums; i++)
832  {
833  int j;
834 
835  boundinfo->datums[i] = &boundDatums[i * partnatts];
836  boundinfo->kind[i] = &boundKinds[i * partnatts];
837  for (j = 0; j < partnatts; j++)
838  {
839  if (rbounds[i]->kind[j] == PARTITION_RANGE_DATUM_VALUE)
840  boundinfo->datums[i][j] =
841  datumCopy(rbounds[i]->datums[j],
842  key->parttypbyval[j],
843  key->parttyplen[j]);
844  boundinfo->kind[i][j] = rbounds[i]->kind[j];
845  }
846 
847  /*
848  * There is no mapping for invalid indexes.
849  *
850  * Any lower bounds in the rbounds array have invalid indexes
851  * assigned, because the values between the previous bound (if there
852  * is one) and this (lower) bound are not part of the range of any
853  * existing partition.
854  */
855  if (rbounds[i]->lower)
856  boundinfo->indexes[i] = -1;
857  else
858  {
859  int orig_index = rbounds[i]->index;
860 
861  /* If the old index has no mapping, assign one */
862  if ((*mapping)[orig_index] == -1)
863  (*mapping)[orig_index] = next_index++;
864 
865  boundinfo->indexes[i] = (*mapping)[orig_index];
866  }
867  }
868 
869  pfree(rbounds);
870 
871  /* Set the canonical value for default_index, if any. */
872  if (default_index != -1)
873  {
874  Assert(default_index >= 0 && (*mapping)[default_index] == -1);
875  (*mapping)[default_index] = next_index++;
876  boundinfo->default_index = (*mapping)[default_index];
877  }
878 
879  /* The extra -1 element. */
880  Assert(i == ndatums);
881  boundinfo->indexes[i] = -1;
882 
883  /* All partitions must now have been assigned canonical indexes. */
884  Assert(next_index == nparts);
885  return boundinfo;
886 }
887 
888 /*
889  * Are two partition bound collections logically equal?
890  *
891  * Used in the keep logic of relcache.c (ie, in RelationClearRelation()).
892  * This is also useful when b1 and b2 are bound collections of two separate
893  * relations, respectively, because PartitionBoundInfo is a canonical
894  * representation of partition bounds.
895  */
896 bool
897 partition_bounds_equal(int partnatts, int16 *parttyplen, bool *parttypbyval,
898  PartitionBoundInfo b1, PartitionBoundInfo b2)
899 {
900  int i;
901 
902  if (b1->strategy != b2->strategy)
903  return false;
904 
905  if (b1->ndatums != b2->ndatums)
906  return false;
907 
908  if (b1->nindexes != b2->nindexes)
909  return false;
910 
911  if (b1->null_index != b2->null_index)
912  return false;
913 
914  if (b1->default_index != b2->default_index)
915  return false;
916 
917  /* For all partition strategies, the indexes[] arrays have to match */
918  for (i = 0; i < b1->nindexes; i++)
919  {
920  if (b1->indexes[i] != b2->indexes[i])
921  return false;
922  }
923 
924  /* Finally, compare the datums[] arrays */
925  if (b1->strategy == PARTITION_STRATEGY_HASH)
926  {
927  /*
928  * We arrange the partitions in the ascending order of their moduli
929  * and remainders. Also every modulus is factor of next larger
930  * modulus. Therefore we can safely store index of a given partition
931  * in indexes array at remainder of that partition. Also entries at
932  * (remainder + N * modulus) positions in indexes array are all same
933  * for (modulus, remainder) specification for any partition. Thus the
934  * datums arrays from the given bounds are the same, if and only if
935  * their indexes arrays are the same. So, it suffices to compare the
936  * indexes arrays.
937  *
938  * Nonetheless make sure that the bounds are indeed the same when the
939  * indexes match. Hash partition bound stores modulus and remainder
940  * at b1->datums[i][0] and b1->datums[i][1] position respectively.
941  */
942 #ifdef USE_ASSERT_CHECKING
943  for (i = 0; i < b1->ndatums; i++)
944  Assert((b1->datums[i][0] == b2->datums[i][0] &&
945  b1->datums[i][1] == b2->datums[i][1]));
946 #endif
947  }
948  else
949  {
950  for (i = 0; i < b1->ndatums; i++)
951  {
952  int j;
953 
954  for (j = 0; j < partnatts; j++)
955  {
956  /* For range partitions, the bounds might not be finite. */
957  if (b1->kind != NULL)
958  {
959  /* The different kinds of bound all differ from each other */
960  if (b1->kind[i][j] != b2->kind[i][j])
961  return false;
962 
963  /*
964  * Non-finite bounds are equal without further
965  * examination.
966  */
967  if (b1->kind[i][j] != PARTITION_RANGE_DATUM_VALUE)
968  continue;
969  }
970 
971  /*
972  * Compare the actual values. Note that it would be both
973  * incorrect and unsafe to invoke the comparison operator
974  * derived from the partitioning specification here. It would
975  * be incorrect because we want the relcache entry to be
976  * updated for ANY change to the partition bounds, not just
977  * those that the partitioning operator thinks are
978  * significant. It would be unsafe because we might reach
979  * this code in the context of an aborted transaction, and an
980  * arbitrary partitioning operator might not be safe in that
981  * context. datumIsEqual() should be simple enough to be
982  * safe.
983  */
984  if (!datumIsEqual(b1->datums[i][j], b2->datums[i][j],
985  parttypbyval[j], parttyplen[j]))
986  return false;
987  }
988  }
989  }
990  return true;
991 }
992 
993 /*
994  * Return a copy of given PartitionBoundInfo structure. The data types of bounds
995  * are described by given partition key specification.
996  *
997  * Note: it's important that this function and its callees not do any catalog
998  * access, nor anything else that would result in allocating memory other than
999  * the returned data structure. Since this is called in a long-lived context,
1000  * that would result in unwanted memory leaks.
1001  */
1002 PartitionBoundInfo
1003 partition_bounds_copy(PartitionBoundInfo src,
1004  PartitionKey key)
1005 {
1006  PartitionBoundInfo dest;
1007  int i;
1008  int ndatums;
1009  int nindexes;
1010  int partnatts;
1011  bool hash_part;
1012  int natts;
1013  Datum *boundDatums;
1014 
1015  dest = (PartitionBoundInfo) palloc(sizeof(PartitionBoundInfoData));
1016 
1017  dest->strategy = src->strategy;
1018  ndatums = dest->ndatums = src->ndatums;
1019  nindexes = dest->nindexes = src->nindexes;
1020  partnatts = key->partnatts;
1021 
1022  /* List partitioned tables have only a single partition key. */
1023  Assert(key->strategy != PARTITION_STRATEGY_LIST || partnatts == 1);
1024 
1025  dest->datums = (Datum **) palloc(sizeof(Datum *) * ndatums);
1026 
1027  if (src->kind != NULL)
1028  {
1029  PartitionRangeDatumKind *boundKinds;
1030 
1031  /* only RANGE partition should have a non-NULL kind */
1032  Assert(key->strategy == PARTITION_STRATEGY_RANGE);
1033 
1034  dest->kind = (PartitionRangeDatumKind **) palloc(ndatums *
1035  sizeof(PartitionRangeDatumKind *));
1036 
1037  /*
1038  * In the loop below, to save from allocating a series of small arrays
1039  * for storing the PartitionRangeDatumKind, we allocate a single chunk
1040  * here and use a smaller portion of it for each datum.
1041  */
1042  boundKinds = (PartitionRangeDatumKind *) palloc(ndatums * partnatts *
1043  sizeof(PartitionRangeDatumKind));
1044 
1045  for (i = 0; i < ndatums; i++)
1046  {
1047  dest->kind[i] = &boundKinds[i * partnatts];
1048  memcpy(dest->kind[i], src->kind[i],
1049  sizeof(PartitionRangeDatumKind) * partnatts);
1050  }
1051  }
1052  else
1053  dest->kind = NULL;
1054 
1055  /* copy interleaved partitions for LIST partitioned tables */
1056  dest->interleaved_parts = bms_copy(src->interleaved_parts);
1057 
1058  /*
1059  * For hash partitioning, datums array will have two elements - modulus
1060  * and remainder.
1061  */
1062  hash_part = (key->strategy == PARTITION_STRATEGY_HASH);
1063  natts = hash_part ? 2 : partnatts;
1064  boundDatums = palloc(ndatums * natts * sizeof(Datum));
1065 
1066  for (i = 0; i < ndatums; i++)
1067  {
1068  int j;
1069 
1070  dest->datums[i] = &boundDatums[i * natts];
1071 
1072  for (j = 0; j < natts; j++)
1073  {
1074  bool byval;
1075  int typlen;
1076 
1077  if (hash_part)
1078  {
1079  typlen = sizeof(int32); /* Always int4 */
1080  byval = true; /* int4 is pass-by-value */
1081  }
1082  else
1083  {
1084  byval = key->parttypbyval[j];
1085  typlen = key->parttyplen[j];
1086  }
1087 
1088  if (dest->kind == NULL ||
1089  dest->kind[i][j] == PARTITION_RANGE_DATUM_VALUE)
1090  dest->datums[i][j] = datumCopy(src->datums[i][j],
1091  byval, typlen);
1092  }
1093  }
1094 
1095  dest->indexes = (int *) palloc(sizeof(int) * nindexes);
1096  memcpy(dest->indexes, src->indexes, sizeof(int) * nindexes);
1097 
1098  dest->null_index = src->null_index;
1099  dest->default_index = src->default_index;
1100 
1101  return dest;
1102 }
1103 
1104 /*
1105  * partition_bounds_merge
1106  * Check to see whether every partition of 'outer_rel' matches/overlaps
1107  * one partition of 'inner_rel' at most, and vice versa; and if so, build
1108  * and return the partition bounds for a join relation between the rels,
1109  * generating two lists of the matching/overlapping partitions, which are
1110  * returned to *outer_parts and *inner_parts respectively.
1111  *
1112  * The lists contain the same number of partitions, and the partitions at the
1113  * same positions in the lists indicate join pairs used for partitioned join.
1114  * If a partition on one side matches/overlaps multiple partitions on the other
1115  * side, this function returns NULL, setting *outer_parts and *inner_parts to
1116  * NIL.
1117  */
1118 PartitionBoundInfo
1119 partition_bounds_merge(int partnatts,
1120  FmgrInfo *partsupfunc, Oid *partcollation,
1121  RelOptInfo *outer_rel, RelOptInfo *inner_rel,
1122  JoinType jointype,
1123  List **outer_parts, List **inner_parts)
1124 {
1125  /*
1126  * Currently, this function is called only from try_partitionwise_join(),
1127  * so the join type should be INNER, LEFT, FULL, SEMI, or ANTI.
1128  */
1129  Assert(jointype == JOIN_INNER || jointype == JOIN_LEFT ||
1130  jointype == JOIN_FULL || jointype == JOIN_SEMI ||
1131  jointype == JOIN_ANTI);
1132 
1133  /* The partitioning strategies should be the same. */
1134  Assert(outer_rel->boundinfo->strategy == inner_rel->boundinfo->strategy);
1135 
1136  *outer_parts = *inner_parts = NIL;
1137  switch (outer_rel->boundinfo->strategy)
1138  {
1139  case PARTITION_STRATEGY_HASH:
1140 
1141  /*
1142  * For hash partitioned tables, we currently support partitioned
1143  * join only when they have exactly the same partition bounds.
1144  *
1145  * XXX: it might be possible to relax the restriction to support
1146  * cases where hash partitioned tables have missing partitions
1147  * and/or different moduli, but it's not clear if it would be
1148  * useful to support the former case since it's unusual to have
1149  * missing partitions. On the other hand, it would be useful to
1150  * support the latter case, but in that case, there is a high
1151  * probability that a partition on one side will match multiple
1152  * partitions on the other side, which is the scenario the current
1153  * implementation of partitioned join can't handle.
1154  */
1155  return NULL;
1156 
1157  case PARTITION_STRATEGY_LIST:
1158  return merge_list_bounds(partsupfunc,
1159  partcollation,
1160  outer_rel,
1161  inner_rel,
1162  jointype,
1163  outer_parts,
1164  inner_parts);
1165 
1166  case PARTITION_STRATEGY_RANGE:
1167  return merge_range_bounds(partnatts,
1168  partsupfunc,
1169  partcollation,
1170  outer_rel,
1171  inner_rel,
1172  jointype,
1173  outer_parts,
1174  inner_parts);
1175  }
1176 
1177  return NULL;
1178 }
1179 
1180 /*
1181  * merge_list_bounds
1182  * Create the partition bounds for a join relation between list
1183  * partitioned tables, if possible
1184  *
1185  * In this function we try to find sets of matching partitions from both sides
1186  * by comparing list values stored in their partition bounds. Since the list
1187  * values appear in the ascending order, an algorithm similar to merge join is
1188  * used for that. If a partition on one side doesn't have a matching
1189  * partition on the other side, the algorithm tries to match it with the
1190  * default partition on the other side if any; if not, the algorithm tries to
1191  * match it with a dummy partition on the other side if it's on the
1192  * non-nullable side of an outer join. Also, if both sides have the default
1193  * partitions, the algorithm tries to match them with each other. We give up
1194  * if the algorithm finds a partition matching multiple partitions on the
1195  * other side, which is the scenario the current implementation of partitioned
1196  * join can't handle.
1197  */
1198 static PartitionBoundInfo
1199 merge_list_bounds(FmgrInfo *partsupfunc, Oid *partcollation,
1200  RelOptInfo *outer_rel, RelOptInfo *inner_rel,
1201  JoinType jointype,
1202  List **outer_parts, List **inner_parts)
1203 {
1204  PartitionBoundInfo merged_bounds = NULL;
1205  PartitionBoundInfo outer_bi = outer_rel->boundinfo;
1206  PartitionBoundInfo inner_bi = inner_rel->boundinfo;
1207  bool outer_has_default = partition_bound_has_default(outer_bi);
1208  bool inner_has_default = partition_bound_has_default(inner_bi);
1209  int outer_default = outer_bi->default_index;
1210  int inner_default = inner_bi->default_index;
1211  bool outer_has_null = partition_bound_accepts_nulls(outer_bi);
1212  bool inner_has_null = partition_bound_accepts_nulls(inner_bi);
1213  PartitionMap outer_map;
1214  PartitionMap inner_map;
1215  int outer_pos;
1216  int inner_pos;
1217  int next_index = 0;
1218  int null_index = -1;
1219  int default_index = -1;
1220  List *merged_datums = NIL;
1221  List *merged_indexes = NIL;
1222 
1223  Assert(*outer_parts == NIL);
1224  Assert(*inner_parts == NIL);
1225  Assert(outer_bi->strategy == inner_bi->strategy &&
1226  outer_bi->strategy == PARTITION_STRATEGY_LIST);
1227  /* List partitioning doesn't require kinds. */
1228  Assert(!outer_bi->kind && !inner_bi->kind);
1229 
1230  init_partition_map(outer_rel, &outer_map);
1231  init_partition_map(inner_rel, &inner_map);
1232 
1233  /*
1234  * If the default partitions (if any) have been proven empty, deem them
1235  * non-existent.
1236  */
1237  if (outer_has_default && is_dummy_partition(outer_rel, outer_default))
1238  outer_has_default = false;
1239  if (inner_has_default && is_dummy_partition(inner_rel, inner_default))
1240  inner_has_default = false;
1241 
1242  /*
1243  * Merge partitions from both sides. In each iteration we compare a pair
1244  * of list values, one from each side, and decide whether the
1245  * corresponding partitions match or not. If the two values match
1246  * exactly, move to the next pair of list values, otherwise move to the
1247  * next list value on the side with a smaller list value.
1248  */
1249  outer_pos = inner_pos = 0;
1250  while (outer_pos < outer_bi->ndatums || inner_pos < inner_bi->ndatums)
1251  {
1252  int outer_index = -1;
1253  int inner_index = -1;
1254  Datum *outer_datums;
1255  Datum *inner_datums;
1256  int cmpval;
1257  Datum *merged_datum = NULL;
1258  int merged_index = -1;
1259 
1260  if (outer_pos < outer_bi->ndatums)
1261  {
1262  /*
1263  * If the partition on the outer side has been proven empty,
1264  * ignore it and move to the next datum on the outer side.
1265  */
1266  outer_index = outer_bi->indexes[outer_pos];
1267  if (is_dummy_partition(outer_rel, outer_index))
1268  {
1269  outer_pos++;
1270  continue;
1271  }
1272  }
1273  if (inner_pos < inner_bi->ndatums)
1274  {
1275  /*
1276  * If the partition on the inner side has been proven empty,
1277  * ignore it and move to the next datum on the inner side.
1278  */
1279  inner_index = inner_bi->indexes[inner_pos];
1280  if (is_dummy_partition(inner_rel, inner_index))
1281  {
1282  inner_pos++;
1283  continue;
1284  }
1285  }
1286 
1287  /* Get the list values. */
1288  outer_datums = outer_pos < outer_bi->ndatums ?
1289  outer_bi->datums[outer_pos] : NULL;
1290  inner_datums = inner_pos < inner_bi->ndatums ?
1291  inner_bi->datums[inner_pos] : NULL;
1292 
1293  /*
1294  * We run this loop till both sides finish. This allows us to avoid
1295  * duplicating code to handle the remaining values on the side which
1296  * finishes later. For that we set the comparison parameter cmpval in
1297  * such a way that it appears as if the side which finishes earlier
1298  * has an extra value higher than any other value on the unfinished
1299  * side. That way we advance the values on the unfinished side till
1300  * all of its values are exhausted.
1301  */
1302  if (outer_pos >= outer_bi->ndatums)
1303  cmpval = 1;
1304  else if (inner_pos >= inner_bi->ndatums)
1305  cmpval = -1;
1306  else
1307  {
1308  Assert(outer_datums != NULL && inner_datums != NULL);
1309  cmpval = DatumGetInt32(FunctionCall2Coll(&partsupfunc[0],
1310  partcollation[0],
1311  outer_datums[0],
1312  inner_datums[0]));
1313  }
1314 
1315  if (cmpval == 0)
1316  {
1317  /* Two list values match exactly. */
1318  Assert(outer_pos < outer_bi->ndatums);
1319  Assert(inner_pos < inner_bi->ndatums);
1320  Assert(outer_index >= 0);
1321  Assert(inner_index >= 0);
1322 
1323  /*
1324  * Try merging both partitions. If successful, add the list value
1325  * and index of the merged partition below.
1326  */
1327  merged_index = merge_matching_partitions(&outer_map, &inner_map,
1328  outer_index, inner_index,
1329  &next_index);
1330  if (merged_index == -1)
1331  goto cleanup;
1332 
1333  merged_datum = outer_datums;
1334 
1335  /* Move to the next pair of list values. */
1336  outer_pos++;
1337  inner_pos++;
1338  }
1339  else if (cmpval < 0)
1340  {
1341  /* A list value missing from the inner side. */
1342  Assert(outer_pos < outer_bi->ndatums);
1343 
1344  /*
1345  * If the inner side has the default partition, or this is an
1346  * outer join, try to assign a merged partition to the outer
1347  * partition (see process_outer_partition()). Otherwise, the
1348  * outer partition will not contribute to the result.
1349  */
1350  if (inner_has_default || IS_OUTER_JOIN(jointype))
1351  {
1352  /* Get the outer partition. */
1353  outer_index = outer_bi->indexes[outer_pos];
1354  Assert(outer_index >= 0);
1355  merged_index = process_outer_partition(&outer_map,
1356  &inner_map,
1357  outer_has_default,
1358  inner_has_default,
1359  outer_index,
1360  inner_default,
1361  jointype,
1362  &next_index,
1363  &default_index);
1364  if (merged_index == -1)
1365  goto cleanup;
1366  merged_datum = outer_datums;
1367  }
1368 
1369  /* Move to the next list value on the outer side. */
1370  outer_pos++;
1371  }
1372  else
1373  {
1374  /* A list value missing from the outer side. */
1375  Assert(cmpval > 0);
1376  Assert(inner_pos < inner_bi->ndatums);
1377 
1378  /*
1379  * If the outer side has the default partition, or this is a FULL
1380  * join, try to assign a merged partition to the inner partition
1381  * (see process_inner_partition()). Otherwise, the inner
1382  * partition will not contribute to the result.
1383  */
1384  if (outer_has_default || jointype == JOIN_FULL)
1385  {
1386  /* Get the inner partition. */
1387  inner_index = inner_bi->indexes[inner_pos];
1388  Assert(inner_index >= 0);
1389  merged_index = process_inner_partition(&outer_map,
1390  &inner_map,
1391  outer_has_default,
1392  inner_has_default,
1393  inner_index,
1394  outer_default,
1395  jointype,
1396  &next_index,
1397  &default_index);
1398  if (merged_index == -1)
1399  goto cleanup;
1400  merged_datum = inner_datums;
1401  }
1402 
1403  /* Move to the next list value on the inner side. */
1404  inner_pos++;
1405  }
1406 
1407  /*
1408  * If we assigned a merged partition, add the list value and index of
1409  * the merged partition if appropriate.
1410  */
1411  if (merged_index >= 0 && merged_index != default_index)
1412  {
1413  merged_datums = lappend(merged_datums, merged_datum);
1414  merged_indexes = lappend_int(merged_indexes, merged_index);
1415  }
1416  }
1417 
1418  /*
1419  * If the NULL partitions (if any) have been proven empty, deem them
1420  * non-existent.
1421  */
1422  if (outer_has_null &&
1423  is_dummy_partition(outer_rel, outer_bi->null_index))
1424  outer_has_null = false;
1425  if (inner_has_null &&
1426  is_dummy_partition(inner_rel, inner_bi->null_index))
1427  inner_has_null = false;
1428 
1429  /* Merge the NULL partitions if any. */
1430  if (outer_has_null || inner_has_null)
1431  merge_null_partitions(&outer_map, &inner_map,
1432  outer_has_null, inner_has_null,
1433  outer_bi->null_index, inner_bi->null_index,
1434  jointype, &next_index, &null_index);
1435  else
1436  Assert(null_index == -1);
1437 
1438  /* Merge the default partitions if any. */
1439  if (outer_has_default || inner_has_default)
1440  merge_default_partitions(&outer_map, &inner_map,
1441  outer_has_default, inner_has_default,
1442  outer_default, inner_default,
1443  jointype, &next_index, &default_index);
1444  else
1445  Assert(default_index == -1);
1446 
1447  /* If we have merged partitions, create the partition bounds. */
1448  if (next_index > 0)
1449  {
1450  /* Fix the merged_indexes list if necessary. */
1451  if (outer_map.did_remapping || inner_map.did_remapping)
1452  {
1453  Assert(jointype == JOIN_FULL);
1454  fix_merged_indexes(&outer_map, &inner_map,
1455  next_index, merged_indexes);
1456  }
1457 
1458  /* Use maps to match partitions from inputs. */
1459  generate_matching_part_pairs(outer_rel, inner_rel,
1460  &outer_map, &inner_map,
1461  next_index,
1462  outer_parts, inner_parts);
1463  Assert(*outer_parts != NIL);
1464  Assert(*inner_parts != NIL);
1465  Assert(list_length(*outer_parts) == list_length(*inner_parts));
1466  Assert(list_length(*outer_parts) <= next_index);
1467 
1468  /* Make a PartitionBoundInfo struct to return. */
1469  merged_bounds = build_merged_partition_bounds(outer_bi->strategy,
1470  merged_datums,
1471  NIL,
1472  merged_indexes,
1473  null_index,
1474  default_index);
1475  Assert(merged_bounds);
1476  }
1477 
1478 cleanup:
1479  /* Free local memory before returning. */
1480  list_free(merged_datums);
1481  list_free(merged_indexes);
1482  free_partition_map(&outer_map);
1483  free_partition_map(&inner_map);
1484 
1485  return merged_bounds;
1486 }
1487 
1488 /*
1489  * merge_range_bounds
1490  * Create the partition bounds for a join relation between range
1491  * partitioned tables, if possible
1492  *
1493  * In this function we try to find sets of overlapping partitions from both
1494  * sides by comparing ranges stored in their partition bounds. Since the
1495  * ranges appear in the ascending order, an algorithm similar to merge join is
1496  * used for that. If a partition on one side doesn't have an overlapping
1497  * partition on the other side, the algorithm tries to match it with the
1498  * default partition on the other side if any; if not, the algorithm tries to
1499  * match it with a dummy partition on the other side if it's on the
1500  * non-nullable side of an outer join. Also, if both sides have the default
1501  * partitions, the algorithm tries to match them with each other. We give up
1502  * if the algorithm finds a partition overlapping multiple partitions on the
1503  * other side, which is the scenario the current implementation of partitioned
1504  * join can't handle.
1505  */
1506 static PartitionBoundInfo
1507 merge_range_bounds(int partnatts, FmgrInfo *partsupfuncs,
1508  Oid *partcollations,
1509  RelOptInfo *outer_rel, RelOptInfo *inner_rel,
1510  JoinType jointype,
1511  List **outer_parts, List **inner_parts)
1512 {
1513  PartitionBoundInfo merged_bounds = NULL;
1514  PartitionBoundInfo outer_bi = outer_rel->boundinfo;
1515  PartitionBoundInfo inner_bi = inner_rel->boundinfo;
1516  bool outer_has_default = partition_bound_has_default(outer_bi);
1517  bool inner_has_default = partition_bound_has_default(inner_bi);
1518  int outer_default = outer_bi->default_index;
1519  int inner_default = inner_bi->default_index;
1520  PartitionMap outer_map;
1521  PartitionMap inner_map;
1522  int outer_index;
1523  int inner_index;
1524  int outer_lb_pos;
1525  int inner_lb_pos;
1526  PartitionRangeBound outer_lb;
1527  PartitionRangeBound outer_ub;
1528  PartitionRangeBound inner_lb;
1529  PartitionRangeBound inner_ub;
1530  int next_index = 0;
1531  int default_index = -1;
1532  List *merged_datums = NIL;
1533  List *merged_kinds = NIL;
1534  List *merged_indexes = NIL;
1535 
1536  Assert(*outer_parts == NIL);
1537  Assert(*inner_parts == NIL);
1538  Assert(outer_bi->strategy == inner_bi->strategy &&
1539  outer_bi->strategy == PARTITION_STRATEGY_RANGE);
1540 
1541  init_partition_map(outer_rel, &outer_map);
1542  init_partition_map(inner_rel, &inner_map);
1543 
1544  /*
1545  * If the default partitions (if any) have been proven empty, deem them
1546  * non-existent.
1547  */
1548  if (outer_has_default && is_dummy_partition(outer_rel, outer_default))
1549  outer_has_default = false;
1550  if (inner_has_default && is_dummy_partition(inner_rel, inner_default))
1551  inner_has_default = false;
1552 
1553  /*
1554  * Merge partitions from both sides. In each iteration we compare a pair
1555  * of ranges, one from each side, and decide whether the corresponding
1556  * partitions match or not. If the two ranges overlap, move to the next
1557  * pair of ranges, otherwise move to the next range on the side with a
1558  * lower range. outer_lb_pos/inner_lb_pos keep track of the positions of
1559  * lower bounds in the datums arrays in the outer/inner
1560  * PartitionBoundInfos respectively.
1561  */
1562  outer_lb_pos = inner_lb_pos = 0;
1563  outer_index = get_range_partition(outer_rel, outer_bi, &outer_lb_pos,
1564  &outer_lb, &outer_ub);
1565  inner_index = get_range_partition(inner_rel, inner_bi, &inner_lb_pos,
1566  &inner_lb, &inner_ub);
1567  while (outer_index >= 0 || inner_index >= 0)
1568  {
1569  bool overlap;
1570  int ub_cmpval;
1571  int lb_cmpval;
1572  PartitionRangeBound merged_lb = {-1, NULL, NULL, true};
1573  PartitionRangeBound merged_ub = {-1, NULL, NULL, false};
1574  int merged_index = -1;
1575 
1576  /*
1577  * We run this loop till both sides finish. This allows us to avoid
1578  * duplicating code to handle the remaining ranges on the side which
1579  * finishes later. For that we set the comparison parameter cmpval in
1580  * such a way that it appears as if the side which finishes earlier
1581  * has an extra range higher than any other range on the unfinished
1582  * side. That way we advance the ranges on the unfinished side till
1583  * all of its ranges are exhausted.
1584  */
1585  if (outer_index == -1)
1586  {
1587  overlap = false;
1588  lb_cmpval = 1;
1589  ub_cmpval = 1;
1590  }
1591  else if (inner_index == -1)
1592  {
1593  overlap = false;
1594  lb_cmpval = -1;
1595  ub_cmpval = -1;
1596  }
1597  else
1598  overlap = compare_range_partitions(partnatts, partsupfuncs,
1599  partcollations,
1600  &outer_lb, &outer_ub,
1601  &inner_lb, &inner_ub,
1602  &lb_cmpval, &ub_cmpval);
1603 
1604  if (overlap)
1605  {
1606  /* Two ranges overlap; form a join pair. */
1607 
1608  PartitionRangeBound save_outer_ub;
1609  PartitionRangeBound save_inner_ub;
1610 
1611  /* Both partitions should not have been merged yet. */
1612  Assert(outer_index >= 0);
1613  Assert(outer_map.merged_indexes[outer_index] == -1 &&
1614  outer_map.merged[outer_index] == false);
1615  Assert(inner_index >= 0);
1616  Assert(inner_map.merged_indexes[inner_index] == -1 &&
1617  inner_map.merged[inner_index] == false);
1618 
1619  /*
1620  * Get the index of the merged partition. Both partitions aren't
1621  * merged yet, so the partitions should be merged successfully.
1622  */
1623  merged_index = merge_matching_partitions(&outer_map, &inner_map,
1624  outer_index, inner_index,
1625  &next_index);
1626  Assert(merged_index >= 0);
1627 
1628  /* Get the range bounds of the merged partition. */
1629  get_merged_range_bounds(partnatts, partsupfuncs,
1630  partcollations, jointype,
1631  &outer_lb, &outer_ub,
1632  &inner_lb, &inner_ub,
1633  lb_cmpval, ub_cmpval,
1634  &merged_lb, &merged_ub);
1635 
1636  /* Save the upper bounds of both partitions for use below. */
1637  save_outer_ub = outer_ub;
1638  save_inner_ub = inner_ub;
1639 
1640  /* Move to the next pair of ranges. */
1641  outer_index = get_range_partition(outer_rel, outer_bi, &outer_lb_pos,
1642  &outer_lb, &outer_ub);
1643  inner_index = get_range_partition(inner_rel, inner_bi, &inner_lb_pos,
1644  &inner_lb, &inner_ub);
1645 
1646  /*
1647  * If the range of a partition on one side overlaps the range of
1648  * the next partition on the other side, that will cause the
1649  * partition on one side to match at least two partitions on the
1650  * other side, which is the case that we currently don't support
1651  * partitioned join for; give up.
1652  */
1653  if (ub_cmpval > 0 && inner_index >= 0 &&
1654  compare_range_bounds(partnatts, partsupfuncs, partcollations,
1655  &save_outer_ub, &inner_lb) > 0)
1656  goto cleanup;
1657  if (ub_cmpval < 0 && outer_index >= 0 &&
1658  compare_range_bounds(partnatts, partsupfuncs, partcollations,
1659  &outer_lb, &save_inner_ub) < 0)
1660  goto cleanup;
1661 
1662  /*
1663  * A row from a non-overlapping portion (if any) of a partition on
1664  * one side might find its join partner in the default partition
1665  * (if any) on the other side, causing the same situation as
1666  * above; give up in that case.
1667  */
1668  if ((outer_has_default && (lb_cmpval > 0 || ub_cmpval < 0)) ||
1669  (inner_has_default && (lb_cmpval < 0 || ub_cmpval > 0)))
1670  goto cleanup;
1671  }
1672  else if (ub_cmpval < 0)
1673  {
1674  /* A non-overlapping outer range. */
1675 
1676  /* The outer partition should not have been merged yet. */
1677  Assert(outer_index >= 0);
1678  Assert(outer_map.merged_indexes[outer_index] == -1 &&
1679  outer_map.merged[outer_index] == false);
1680 
1681  /*
1682  * If the inner side has the default partition, or this is an
1683  * outer join, try to assign a merged partition to the outer
1684  * partition (see process_outer_partition()). Otherwise, the
1685  * outer partition will not contribute to the result.
1686  */
1687  if (inner_has_default || IS_OUTER_JOIN(jointype))
1688  {
1689  merged_index = process_outer_partition(&outer_map,
1690  &inner_map,
1691  outer_has_default,
1692  inner_has_default,
1693  outer_index,
1694  inner_default,
1695  jointype,
1696  &next_index,
1697  &default_index);
1698  if (merged_index == -1)
1699  goto cleanup;
1700  merged_lb = outer_lb;
1701  merged_ub = outer_ub;
1702  }
1703 
1704  /* Move to the next range on the outer side. */
1705  outer_index = get_range_partition(outer_rel, outer_bi, &outer_lb_pos,
1706  &outer_lb, &outer_ub);
1707  }
1708  else
1709  {
1710  /* A non-overlapping inner range. */
1711  Assert(ub_cmpval > 0);
1712 
1713  /* The inner partition should not have been merged yet. */
1714  Assert(inner_index >= 0);
1715  Assert(inner_map.merged_indexes[inner_index] == -1 &&
1716  inner_map.merged[inner_index] == false);
1717 
1718  /*
1719  * If the outer side has the default partition, or this is a FULL
1720  * join, try to assign a merged partition to the inner partition
1721  * (see process_inner_partition()). Otherwise, the inner
1722  * partition will not contribute to the result.
1723  */
1724  if (outer_has_default || jointype == JOIN_FULL)
1725  {
1726  merged_index = process_inner_partition(&outer_map,
1727  &inner_map,
1728  outer_has_default,
1729  inner_has_default,
1730  inner_index,
1731  outer_default,
1732  jointype,
1733  &next_index,
1734  &default_index);
1735  if (merged_index == -1)
1736  goto cleanup;
1737  merged_lb = inner_lb;
1738  merged_ub = inner_ub;
1739  }
1740 
1741  /* Move to the next range on the inner side. */
1742  inner_index = get_range_partition(inner_rel, inner_bi, &inner_lb_pos,
1743  &inner_lb, &inner_ub);
1744  }
1745 
1746  /*
1747  * If we assigned a merged partition, add the range bounds and index
1748  * of the merged partition if appropriate.
1749  */
1750  if (merged_index >= 0 && merged_index != default_index)
1751  add_merged_range_bounds(partnatts, partsupfuncs, partcollations,
1752  &merged_lb, &merged_ub, merged_index,
1753  &merged_datums, &merged_kinds,
1754  &merged_indexes);
1755  }
1756 
1757  /* Merge the default partitions if any. */
1758  if (outer_has_default || inner_has_default)
1759  merge_default_partitions(&outer_map, &inner_map,
1760  outer_has_default, inner_has_default,
1761  outer_default, inner_default,
1762  jointype, &next_index, &default_index);
1763  else
1764  Assert(default_index == -1);
1765 
1766  /* If we have merged partitions, create the partition bounds. */
1767  if (next_index > 0)
1768  {
1769  /*
1770  * Unlike the case of list partitioning, we wouldn't have re-merged
1771  * partitions, so did_remapping should be left alone.
1772  */
1773  Assert(!outer_map.did_remapping);
1774  Assert(!inner_map.did_remapping);
1775 
1776  /* Use maps to match partitions from inputs. */
1777  generate_matching_part_pairs(outer_rel, inner_rel,
1778  &outer_map, &inner_map,
1779  next_index,
1780  outer_parts, inner_parts);
1781  Assert(*outer_parts != NIL);
1782  Assert(*inner_parts != NIL);
1783  Assert(list_length(*outer_parts) == list_length(*inner_parts));
1784  Assert(list_length(*outer_parts) == next_index);
1785 
1786  /* Make a PartitionBoundInfo struct to return. */
1787  merged_bounds = build_merged_partition_bounds(outer_bi->strategy,
1788  merged_datums,
1789  merged_kinds,
1790  merged_indexes,
1791  -1,
1792  default_index);
1793  Assert(merged_bounds);
1794  }
1795 
1796 cleanup:
1797  /* Free local memory before returning. */
1798  list_free(merged_datums);
1799  list_free(merged_kinds);
1800  list_free(merged_indexes);
1801  free_partition_map(&outer_map);
1802  free_partition_map(&inner_map);
1803 
1804  return merged_bounds;
1805 }
1806 
1807 /*
1808  * init_partition_map
1809  * Initialize a PartitionMap struct for given relation
1810  */
1811 static void
1812 init_partition_map(RelOptInfo *rel, PartitionMap *map)
1813 {
1814  int nparts = rel->nparts;
1815  int i;
1816 
1817  map->nparts = nparts;
1818  map->merged_indexes = (int *) palloc(sizeof(int) * nparts);
1819  map->merged = (bool *) palloc(sizeof(bool) * nparts);
1820  map->did_remapping = false;
1821  map->old_indexes = (int *) palloc(sizeof(int) * nparts);
1822  for (i = 0; i < nparts; i++)
1823  {
1824  map->merged_indexes[i] = map->old_indexes[i] = -1;
1825  map->merged[i] = false;
1826  }
1827 }
1828 
1829 /*
1830  * free_partition_map
1831  */
1832 static void
1833 free_partition_map(PartitionMap *map)
1834 {
1835  pfree(map->merged_indexes);
1836  pfree(map->merged);
1837  pfree(map->old_indexes);
1838 }
1839 
1840 /*
1841  * is_dummy_partition --- has partition been proven empty?
1842  */
1843 static bool
1844 is_dummy_partition(RelOptInfo *rel, int part_index)
1845 {
1846  RelOptInfo *part_rel;
1847 
1848  Assert(part_index >= 0);
1849  part_rel = rel->part_rels[part_index];
1850  if (part_rel == NULL || IS_DUMMY_REL(part_rel))
1851  return true;
1852  return false;
1853 }
1854 
1855 /*
1856  * merge_matching_partitions
1857  * Try to merge given outer/inner partitions, and return the index of a
1858  * merged partition produced from them if successful, -1 otherwise
1859  *
1860  * If the merged partition is newly created, *next_index is incremented.
1861  */
1862 static int
1863 merge_matching_partitions(PartitionMap *outer_map, PartitionMap *inner_map,
1864  int outer_index, int inner_index, int *next_index)
1865 {
1866  int outer_merged_index;
1867  int inner_merged_index;
1868  bool outer_merged;
1869  bool inner_merged;
1870 
1871  Assert(outer_index >= 0 && outer_index < outer_map->nparts);
1872  outer_merged_index = outer_map->merged_indexes[outer_index];
1873  outer_merged = outer_map->merged[outer_index];
1874  Assert(inner_index >= 0 && inner_index < inner_map->nparts);
1875  inner_merged_index = inner_map->merged_indexes[inner_index];
1876  inner_merged = inner_map->merged[inner_index];
1877 
1878  /*
1879  * Handle cases where we have already assigned a merged partition to each
1880  * of the given partitions.
1881  */
1882  if (outer_merged_index >= 0 && inner_merged_index >= 0)
1883  {
1884  /*
1885  * If the merged partitions are the same, no need to do anything;
1886  * return the index of the merged partitions. Otherwise, if each of
1887  * the given partitions has been merged with a dummy partition on the
1888  * other side, re-map them to either of the two merged partitions.
1889  * Otherwise, they can't be merged, so return -1.
1890  */
1891  if (outer_merged_index == inner_merged_index)
1892  {
1893  Assert(outer_merged);
1894  Assert(inner_merged);
1895  return outer_merged_index;
1896  }
1897  if (!outer_merged && !inner_merged)
1898  {
1899  /*
1900  * This can only happen for a list-partitioning case. We re-map
1901  * them to the merged partition with the smaller of the two merged
1902  * indexes to preserve the property that the canonical order of
1903  * list partitions is determined by the indexes assigned to the
1904  * smallest list value of each partition.
1905  */
1906  if (outer_merged_index < inner_merged_index)
1907  {
1908  outer_map->merged[outer_index] = true;
1909  inner_map->merged_indexes[inner_index] = outer_merged_index;
1910  inner_map->merged[inner_index] = true;
1911  inner_map->did_remapping = true;
1912  inner_map->old_indexes[inner_index] = inner_merged_index;
1913  return outer_merged_index;
1914  }
1915  else
1916  {
1917  inner_map->merged[inner_index] = true;
1918  outer_map->merged_indexes[outer_index] = inner_merged_index;
1919  outer_map->merged[outer_index] = true;
1920  outer_map->did_remapping = true;
1921  outer_map->old_indexes[outer_index] = outer_merged_index;
1922  return inner_merged_index;
1923  }
1924  }
1925  return -1;
1926  }
1927 
1928  /* At least one of the given partitions should not have yet been merged. */
1929  Assert(outer_merged_index == -1 || inner_merged_index == -1);
1930 
1931  /*
1932  * If neither of them has been merged, merge them. Otherwise, if one has
1933  * been merged with a dummy partition on the other side (and the other
1934  * hasn't yet been merged with anything), re-merge them. Otherwise, they
1935  * can't be merged, so return -1.
1936  */
1937  if (outer_merged_index == -1 && inner_merged_index == -1)
1938  {
1939  int merged_index = *next_index;
1940 
1941  Assert(!outer_merged);
1942  Assert(!inner_merged);
1943  outer_map->merged_indexes[outer_index] = merged_index;
1944  outer_map->merged[outer_index] = true;
1945  inner_map->merged_indexes[inner_index] = merged_index;
1946  inner_map->merged[inner_index] = true;
1947  *next_index = *next_index + 1;
1948  return merged_index;
1949  }
1950  if (outer_merged_index >= 0 && !outer_map->merged[outer_index])
1951  {
1952  Assert(inner_merged_index == -1);
1953  Assert(!inner_merged);
1954  inner_map->merged_indexes[inner_index] = outer_merged_index;
1955  inner_map->merged[inner_index] = true;
1956  outer_map->merged[outer_index] = true;
1957  return outer_merged_index;
1958  }
1959  if (inner_merged_index >= 0 && !inner_map->merged[inner_index])
1960  {
1961  Assert(outer_merged_index == -1);
1962  Assert(!outer_merged);
1963  outer_map->merged_indexes[outer_index] = inner_merged_index;
1964  outer_map->merged[outer_index] = true;
1965  inner_map->merged[inner_index] = true;
1966  return inner_merged_index;
1967  }
1968  return -1;
1969 }
1970 
1971 /*
1972  * process_outer_partition
1973  * Try to assign given outer partition a merged partition, and return the
1974  * index of the merged partition if successful, -1 otherwise
1975  *
1976  * If the partition is newly created, *next_index is incremented. Also, if it
1977  * is the default partition of the join relation, *default_index is set to the
1978  * index if not already done.
1979  */
1980 static int
1981 process_outer_partition(PartitionMap *outer_map,
1982  PartitionMap *inner_map,
1983  bool outer_has_default,
1984  bool inner_has_default,
1985  int outer_index,
1986  int inner_default,
1987  JoinType jointype,
1988  int *next_index,
1989  int *default_index)
1990 {
1991  int merged_index = -1;
1992 
1993  Assert(outer_index >= 0);
1994 
1995  /*
1996  * If the inner side has the default partition, a row from the outer
1997  * partition might find its join partner in the default partition; try
1998  * merging the outer partition with the default partition. Otherwise,
1999  * this should be an outer join, in which case the outer partition has to
2000  * be scanned all the way anyway; merge the outer partition with a dummy
2001  * partition on the other side.
2002  */
2003  if (inner_has_default)
2004  {
2005  Assert(inner_default >= 0);
2006 
2007  /*
2008  * If the outer side has the default partition as well, the default
2009  * partition on the inner side will have two matching partitions on
2010  * the other side: the outer partition and the default partition on
2011  * the outer side. Partitionwise join doesn't handle this scenario
2012  * yet.
2013  */
2014  if (outer_has_default)
2015  return -1;
2016 
2017  merged_index = merge_matching_partitions(outer_map, inner_map,
2018  outer_index, inner_default,
2019  next_index);
2020  if (merged_index == -1)
2021  return -1;
2022 
2023  /*
2024  * If this is a FULL join, the default partition on the inner side has
2025  * to be scanned all the way anyway, so the resulting partition will
2026  * contain all key values from the default partition, which any other
2027  * partition of the join relation will not contain. Thus the
2028  * resulting partition will act as the default partition of the join
2029  * relation; record the index in *default_index if not already done.
2030  */
2031  if (jointype == JOIN_FULL)
2032  {
2033  if (*default_index == -1)
2034  *default_index = merged_index;
2035  else
2036  Assert(*default_index == merged_index);
2037  }
2038  }
2039  else
2040  {
2041  Assert(IS_OUTER_JOIN(jointype));
2042  Assert(jointype != JOIN_RIGHT);
2043 
2044  /* If we have already assigned a partition, no need to do anything. */
2045  merged_index = outer_map->merged_indexes[outer_index];
2046  if (merged_index == -1)
2047  merged_index = merge_partition_with_dummy(outer_map, outer_index,
2048  next_index);
2049  }
2050  return merged_index;
2051 }
2052 
2053 /*
2054  * process_inner_partition
2055  * Try to assign given inner partition a merged partition, and return the
2056  * index of the merged partition if successful, -1 otherwise
2057  *
2058  * If the partition is newly created, *next_index is incremented. Also, if it
2059  * is the default partition of the join relation, *default_index is set to the
2060  * index if not already done.
2061  */
2062 static int
2063 process_inner_partition(PartitionMap *outer_map,
2064  PartitionMap *inner_map,
2065  bool outer_has_default,
2066  bool inner_has_default,
2067  int inner_index,
2068  int outer_default,
2069  JoinType jointype,
2070  int *next_index,
2071  int *default_index)
2072 {
2073  int merged_index = -1;
2074 
2075  Assert(inner_index >= 0);
2076 
2077  /*
2078  * If the outer side has the default partition, a row from the inner
2079  * partition might find its join partner in the default partition; try
2080  * merging the inner partition with the default partition. Otherwise,
2081  * this should be a FULL join, in which case the inner partition has to be
2082  * scanned all the way anyway; merge the inner partition with a dummy
2083  * partition on the other side.
2084  */
2085  if (outer_has_default)
2086  {
2087  Assert(outer_default >= 0);
2088 
2089  /*
2090  * If the inner side has the default partition as well, the default
2091  * partition on the outer side will have two matching partitions on
2092  * the other side: the inner partition and the default partition on
2093  * the inner side. Partitionwise join doesn't handle this scenario
2094  * yet.
2095  */
2096  if (inner_has_default)
2097  return -1;
2098 
2099  merged_index = merge_matching_partitions(outer_map, inner_map,
2100  outer_default, inner_index,
2101  next_index);
2102  if (merged_index == -1)
2103  return -1;
2104 
2105  /*
2106  * If this is an outer join, the default partition on the outer side
2107  * has to be scanned all the way anyway, so the resulting partition
2108  * will contain all key values from the default partition, which any
2109  * other partition of the join relation will not contain. Thus the
2110  * resulting partition will act as the default partition of the join
2111  * relation; record the index in *default_index if not already done.
2112  */
2113  if (IS_OUTER_JOIN(jointype))
2114  {
2115  Assert(jointype != JOIN_RIGHT);
2116  if (*default_index == -1)
2117  *default_index = merged_index;
2118  else
2119  Assert(*default_index == merged_index);
2120  }
2121  }
2122  else
2123  {
2124  Assert(jointype == JOIN_FULL);
2125 
2126  /* If we have already assigned a partition, no need to do anything. */
2127  merged_index = inner_map->merged_indexes[inner_index];
2128  if (merged_index == -1)
2129  merged_index = merge_partition_with_dummy(inner_map, inner_index,
2130  next_index);
2131  }
2132  return merged_index;
2133 }
2134 
2135 /*
2136  * merge_null_partitions
2137  * Merge the NULL partitions from a join's outer and inner sides.
2138  *
2139  * If the merged partition produced from them is the NULL partition of the join
2140  * relation, *null_index is set to the index of the merged partition.
2141  *
2142  * Note: We assume here that the join clause for a partitioned join is strict
2143  * because have_partkey_equi_join() requires that the corresponding operator
2144  * be mergejoinable, and we currently assume that mergejoinable operators are
2145  * strict (see MJEvalOuterValues()/MJEvalInnerValues()).
2146  */
2147 static void
2148 merge_null_partitions(PartitionMap *outer_map,
2149  PartitionMap *inner_map,
2150  bool outer_has_null,
2151  bool inner_has_null,
2152  int outer_null,
2153  int inner_null,
2154  JoinType jointype,
2155  int *next_index,
2156  int *null_index)
2157 {
2158  bool consider_outer_null = false;
2159  bool consider_inner_null = false;
2160 
2161  Assert(outer_has_null || inner_has_null);
2162  Assert(*null_index == -1);
2163 
2164  /*
2165  * Check whether the NULL partitions have already been merged and if so,
2166  * set the consider_outer_null/consider_inner_null flags.
2167  */
2168  if (outer_has_null)
2169  {
2170  Assert(outer_null >= 0 && outer_null < outer_map->nparts);
2171  if (outer_map->merged_indexes[outer_null] == -1)
2172  consider_outer_null = true;
2173  }
2174  if (inner_has_null)
2175  {
2176  Assert(inner_null >= 0 && inner_null < inner_map->nparts);
2177  if (inner_map->merged_indexes[inner_null] == -1)
2178  consider_inner_null = true;
2179  }
2180 
2181  /* If both flags are set false, we don't need to do anything. */
2182  if (!consider_outer_null && !consider_inner_null)
2183  return;
2184 
2185  if (consider_outer_null && !consider_inner_null)
2186  {
2187  Assert(outer_has_null);
2188 
2189  /*
2190  * If this is an outer join, the NULL partition on the outer side has
2191  * to be scanned all the way anyway; merge the NULL partition with a
2192  * dummy partition on the other side. In that case
2193  * consider_outer_null means that the NULL partition only contains
2194  * NULL values as the key values, so the merged partition will do so;
2195  * treat it as the NULL partition of the join relation.
2196  */
2197  if (IS_OUTER_JOIN(jointype))
2198  {
2199  Assert(jointype != JOIN_RIGHT);
2200  *null_index = merge_partition_with_dummy(outer_map, outer_null,
2201  next_index);
2202  }
2203  }
2204  else if (!consider_outer_null && consider_inner_null)
2205  {
2206  Assert(inner_has_null);
2207 
2208  /*
2209  * If this is a FULL join, the NULL partition on the inner side has to
2210  * be scanned all the way anyway; merge the NULL partition with a
2211  * dummy partition on the other side. In that case
2212  * consider_inner_null means that the NULL partition only contains
2213  * NULL values as the key values, so the merged partition will do so;
2214  * treat it as the NULL partition of the join relation.
2215  */
2216  if (jointype == JOIN_FULL)
2217  *null_index = merge_partition_with_dummy(inner_map, inner_null,
2218  next_index);
2219  }
2220  else
2221  {
2222  Assert(consider_outer_null && consider_inner_null);
2223  Assert(outer_has_null);
2224  Assert(inner_has_null);
2225 
2226  /*
2227  * If this is an outer join, the NULL partition on the outer side (and
2228  * that on the inner side if this is a FULL join) have to be scanned
2229  * all the way anyway, so merge them. Note that each of the NULL
2230  * partitions isn't merged yet, so they should be merged successfully.
2231  * Like the above, each of the NULL partitions only contains NULL
2232  * values as the key values, so the merged partition will do so; treat
2233  * it as the NULL partition of the join relation.
2234  *
2235  * Note: if this an INNER/SEMI join, the join clause will never be
2236  * satisfied by two NULL values (see comments above), so both the NULL
2237  * partitions can be eliminated.
2238  */
2239  if (IS_OUTER_JOIN(jointype))
2240  {
2241  Assert(jointype != JOIN_RIGHT);
2242  *null_index = merge_matching_partitions(outer_map, inner_map,
2243  outer_null, inner_null,
2244  next_index);
2245  Assert(*null_index >= 0);
2246  }
2247  }
2248 }
2249 
2250 /*
2251  * merge_default_partitions
2252  * Merge the default partitions from a join's outer and inner sides.
2253  *
2254  * If the merged partition produced from them is the default partition of the
2255  * join relation, *default_index is set to the index of the merged partition.
2256  */
2257 static void
2258 merge_default_partitions(PartitionMap *outer_map,
2259  PartitionMap *inner_map,
2260  bool outer_has_default,
2261  bool inner_has_default,
2262  int outer_default,
2263  int inner_default,
2264  JoinType jointype,
2265  int *next_index,
2266  int *default_index)
2267 {
2268  int outer_merged_index = -1;
2269  int inner_merged_index = -1;
2270 
2271  Assert(outer_has_default || inner_has_default);
2272 
2273  /* Get the merged partition indexes for the default partitions. */
2274  if (outer_has_default)
2275  {
2276  Assert(outer_default >= 0 && outer_default < outer_map->nparts);
2277  outer_merged_index = outer_map->merged_indexes[outer_default];
2278  }
2279  if (inner_has_default)
2280  {
2281  Assert(inner_default >= 0 && inner_default < inner_map->nparts);
2282  inner_merged_index = inner_map->merged_indexes[inner_default];
2283  }
2284 
2285  if (outer_has_default && !inner_has_default)
2286  {
2287  /*
2288  * If this is an outer join, the default partition on the outer side
2289  * has to be scanned all the way anyway; if we have not yet assigned a
2290  * partition, merge the default partition with a dummy partition on
2291  * the other side. The merged partition will act as the default
2292  * partition of the join relation (see comments in
2293  * process_inner_partition()).
2294  */
2295  if (IS_OUTER_JOIN(jointype))
2296  {
2297  Assert(jointype != JOIN_RIGHT);
2298  if (outer_merged_index == -1)
2299  {
2300  Assert(*default_index == -1);
2301  *default_index = merge_partition_with_dummy(outer_map,
2302  outer_default,
2303  next_index);
2304  }
2305  else
2306  Assert(*default_index == outer_merged_index);
2307  }
2308  else
2309  Assert(*default_index == -1);
2310  }
2311  else if (!outer_has_default && inner_has_default)
2312  {
2313  /*
2314  * If this is a FULL join, the default partition on the inner side has
2315  * to be scanned all the way anyway; if we have not yet assigned a
2316  * partition, merge the default partition with a dummy partition on
2317  * the other side. The merged partition will act as the default
2318  * partition of the join relation (see comments in
2319  * process_outer_partition()).
2320  */
2321  if (jointype == JOIN_FULL)
2322  {
2323  if (inner_merged_index == -1)
2324  {
2325  Assert(*default_index == -1);
2326  *default_index = merge_partition_with_dummy(inner_map,
2327  inner_default,
2328  next_index);
2329  }
2330  else
2331  Assert(*default_index == inner_merged_index);
2332  }
2333  else
2334  Assert(*default_index == -1);
2335  }
2336  else
2337  {
2338  Assert(outer_has_default && inner_has_default);
2339 
2340  /*
2341  * The default partitions have to be joined with each other, so merge
2342  * them. Note that each of the default partitions isn't merged yet
2343  * (see, process_outer_partition()/process_inner_partition()), so they
2344  * should be merged successfully. The merged partition will act as
2345  * the default partition of the join relation.
2346  */
2347  Assert(outer_merged_index == -1);
2348  Assert(inner_merged_index == -1);
2349  Assert(*default_index == -1);
2350  *default_index = merge_matching_partitions(outer_map,
2351  inner_map,
2352  outer_default,
2353  inner_default,
2354  next_index);
2355  Assert(*default_index >= 0);
2356  }
2357 }
2358 
2359 /*
2360  * merge_partition_with_dummy
2361  * Assign given partition a new partition of a join relation
2362  *
2363  * Note: The caller assumes that the given partition doesn't have a non-dummy
2364  * matching partition on the other side, but if the given partition finds the
2365  * matching partition later, we will adjust the assignment.
2366  */
2367 static int
2368 merge_partition_with_dummy(PartitionMap *map, int index, int *next_index)
2369 {
2370  int merged_index = *next_index;
2371 
2372  Assert(index >= 0 && index < map->nparts);
2373  Assert(map->merged_indexes[index] == -1);
2374  Assert(!map->merged[index]);
2375  map->merged_indexes[index] = merged_index;
2376  /* Leave the merged flag alone! */
2377  *next_index = *next_index + 1;
2378  return merged_index;
2379 }
2380 
2381 /*
2382  * fix_merged_indexes
2383  * Adjust merged indexes of re-merged partitions
2384  */
2385 static void
2386 fix_merged_indexes(PartitionMap *outer_map, PartitionMap *inner_map,
2387  int nmerged, List *merged_indexes)
2388 {
2389  int *new_indexes;
2390  int merged_index;
2391  int i;
2392  ListCell *lc;
2393 
2394  Assert(nmerged > 0);
2395 
2396  new_indexes = (int *) palloc(sizeof(int) * nmerged);
2397  for (i = 0; i < nmerged; i++)
2398  new_indexes[i] = -1;
2399 
2400  /* Build the mapping of old merged indexes to new merged indexes. */
2401  if (outer_map->did_remapping)
2402  {
2403  for (i = 0; i < outer_map->nparts; i++)
2404  {
2405  merged_index = outer_map->old_indexes[i];
2406  if (merged_index >= 0)
2407  new_indexes[merged_index] = outer_map->merged_indexes[i];
2408  }
2409  }
2410  if (inner_map->did_remapping)
2411  {
2412  for (i = 0; i < inner_map->nparts; i++)
2413  {
2414  merged_index = inner_map->old_indexes[i];
2415  if (merged_index >= 0)
2416  new_indexes[merged_index] = inner_map->merged_indexes[i];
2417  }
2418  }
2419 
2420  /* Fix the merged_indexes list using the mapping. */
2421  foreach(lc, merged_indexes)
2422  {
2423  merged_index = lfirst_int(lc);
2424  Assert(merged_index >= 0);
2425  if (new_indexes[merged_index] >= 0)
2426  lfirst_int(lc) = new_indexes[merged_index];
2427  }
2428 
2429  pfree(new_indexes);
2430 }
2431 
2432 /*
2433  * generate_matching_part_pairs
2434  * Generate a pair of lists of partitions that produce merged partitions
2435  *
2436  * The lists of partitions are built in the order of merged partition indexes,
2437  * and returned in *outer_parts and *inner_parts.
2438  */
2439 static void
2440 generate_matching_part_pairs(RelOptInfo *outer_rel, RelOptInfo *inner_rel,
2441  PartitionMap *outer_map, PartitionMap *inner_map,
2442  int nmerged,
2443  List **outer_parts, List **inner_parts)
2444 {
2445  int outer_nparts = outer_map->nparts;
2446  int inner_nparts = inner_map->nparts;
2447  int *outer_indexes;
2448  int *inner_indexes;
2449  int max_nparts;
2450  int i;
2451 
2452  Assert(nmerged > 0);
2453  Assert(*outer_parts == NIL);
2454  Assert(*inner_parts == NIL);
2455 
2456  outer_indexes = (int *) palloc(sizeof(int) * nmerged);
2457  inner_indexes = (int *) palloc(sizeof(int) * nmerged);
2458  for (i = 0; i < nmerged; i++)
2459  outer_indexes[i] = inner_indexes[i] = -1;
2460 
2461  /* Set pairs of matching partitions. */
2462  Assert(outer_nparts == outer_rel->nparts);
2463  Assert(inner_nparts == inner_rel->nparts);
2464  max_nparts = Max(outer_nparts, inner_nparts);
2465  for (i = 0; i < max_nparts; i++)
2466  {
2467  if (i < outer_nparts)
2468  {
2469  int merged_index = outer_map->merged_indexes[i];
2470 
2471  if (merged_index >= 0)
2472  {
2473  Assert(merged_index < nmerged);
2474  outer_indexes[merged_index] = i;
2475  }
2476  }
2477  if (i < inner_nparts)
2478  {
2479  int merged_index = inner_map->merged_indexes[i];
2480 
2481  if (merged_index >= 0)
2482  {
2483  Assert(merged_index < nmerged);
2484  inner_indexes[merged_index] = i;
2485  }
2486  }
2487  }
2488 
2489  /* Build the list pairs. */
2490  for (i = 0; i < nmerged; i++)
2491  {
2492  int outer_index = outer_indexes[i];
2493  int inner_index = inner_indexes[i];
2494 
2495  /*
2496  * If both partitions are dummy, it means the merged partition that
2497  * had been assigned to the outer/inner partition was removed when
2498  * re-merging the outer/inner partition in
2499  * merge_matching_partitions(); ignore the merged partition.
2500  */
2501  if (outer_index == -1 && inner_index == -1)
2502  continue;
2503 
2504  *outer_parts = lappend(*outer_parts, outer_index >= 0 ?
2505  outer_rel->part_rels[outer_index] : NULL);
2506  *inner_parts = lappend(*inner_parts, inner_index >= 0 ?
2507  inner_rel->part_rels[inner_index] : NULL);
2508  }
2509 
2510  pfree(outer_indexes);
2511  pfree(inner_indexes);
2512 }
2513 
2514 /*
2515  * build_merged_partition_bounds
2516  * Create a PartitionBoundInfo struct from merged partition bounds
2517  */
2518 static PartitionBoundInfo
2519 build_merged_partition_bounds(char strategy, List *merged_datums,
2520  List *merged_kinds, List *merged_indexes,
2521  int null_index, int default_index)
2522 {
2523  PartitionBoundInfo merged_bounds;
2524  int ndatums = list_length(merged_datums);
2525  int pos;
2526  ListCell *lc;
2527 
2528  merged_bounds = (PartitionBoundInfo) palloc(sizeof(PartitionBoundInfoData));
2529  merged_bounds->strategy = strategy;
2530  merged_bounds->ndatums = ndatums;
2531 
2532  merged_bounds->datums = (Datum **) palloc(sizeof(Datum *) * ndatums);
2533  pos = 0;
2534  foreach(lc, merged_datums)
2535  merged_bounds->datums[pos++] = (Datum *) lfirst(lc);
2536 
2537  if (strategy == PARTITION_STRATEGY_RANGE)
2538  {
2539  Assert(list_length(merged_kinds) == ndatums);
2540  merged_bounds->kind = (PartitionRangeDatumKind **)
2541  palloc(sizeof(PartitionRangeDatumKind *) * ndatums);
2542  pos = 0;
2543  foreach(lc, merged_kinds)
2544  merged_bounds->kind[pos++] = (PartitionRangeDatumKind *) lfirst(lc);
2545 
2546  /* There are ndatums+1 indexes in the case of range partitioning. */
2547  merged_indexes = lappend_int(merged_indexes, -1);
2548  ndatums++;
2549  }
2550  else
2551  {
2552  Assert(strategy == PARTITION_STRATEGY_LIST);
2553  Assert(merged_kinds == NIL);
2554  merged_bounds->kind = NULL;
2555  }
2556 
2557  /* interleaved_parts is always NULL for join relations. */
2558  merged_bounds->interleaved_parts = NULL;
2559 
2560  Assert(list_length(merged_indexes) == ndatums);
2561  merged_bounds->nindexes = ndatums;
2562  merged_bounds->indexes = (int *) palloc(sizeof(int) * ndatums);
2563  pos = 0;
2564  foreach(lc, merged_indexes)
2565  merged_bounds->indexes[pos++] = lfirst_int(lc);
2566 
2567  merged_bounds->null_index = null_index;
2568  merged_bounds->default_index = default_index;
2569 
2570  return merged_bounds;
2571 }
2572 
2573 /*
2574  * get_range_partition
2575  * Get the next non-dummy partition of a range-partitioned relation,
2576  * returning the index of that partition
2577  *
2578  * *lb and *ub are set to the lower and upper bounds of that partition
2579  * respectively, and *lb_pos is advanced to the next lower bound, if any.
2580  */
2581 static int
2582 get_range_partition(RelOptInfo *rel,
2583  PartitionBoundInfo bi,
2584  int *lb_pos,
2585  PartitionRangeBound *lb,
2586  PartitionRangeBound *ub)
2587 {
2588  int part_index;
2589 
2590  Assert(bi->strategy == PARTITION_STRATEGY_RANGE);
2591 
2592  do
2593  {
2594  part_index = get_range_partition_internal(bi, lb_pos, lb, ub);
2595  if (part_index == -1)
2596  return -1;
2597  } while (is_dummy_partition(rel, part_index));
2598 
2599  return part_index;
2600 }
2601 
2602 static int
2603 get_range_partition_internal(PartitionBoundInfo bi,
2604  int *lb_pos,
2605  PartitionRangeBound *lb,
2606  PartitionRangeBound *ub)
2607 {
2608  /* Return the index as -1 if we've exhausted all lower bounds. */
2609  if (*lb_pos >= bi->ndatums)
2610  return -1;
2611 
2612  /* A lower bound should have at least one more bound after it. */
2613  Assert(*lb_pos + 1 < bi->ndatums);
2614 
2615  /* Set the lower bound. */
2616  lb->index = bi->indexes[*lb_pos];
2617  lb->datums = bi->datums[*lb_pos];
2618  lb->kind = bi->kind[*lb_pos];
2619  lb->lower = true;
2620  /* Set the upper bound. */
2621  ub->index = bi->indexes[*lb_pos + 1];
2622  ub->datums = bi->datums[*lb_pos + 1];
2623  ub->kind = bi->kind[*lb_pos + 1];
2624  ub->lower = false;
2625 
2626  /* The index assigned to an upper bound should be valid. */
2627  Assert(ub->index >= 0);
2628 
2629  /*
2630  * Advance the position to the next lower bound. If there are no bounds
2631  * left beyond the upper bound, we have reached the last lower bound.
2632  */
2633  if (*lb_pos + 2 >= bi->ndatums)
2634  *lb_pos = bi->ndatums;
2635  else
2636  {
2637  /*
2638  * If the index assigned to the bound next to the upper bound isn't
2639  * valid, that is the next lower bound; else, the upper bound is also
2640  * the lower bound of the next range partition.
2641  */
2642  if (bi->indexes[*lb_pos + 2] < 0)
2643  *lb_pos = *lb_pos + 2;
2644  else
2645  *lb_pos = *lb_pos + 1;
2646  }
2647 
2648  return ub->index;
2649 }
2650 
2651 /*
2652  * compare_range_partitions
2653  * Compare the bounds of two range partitions, and return true if the
2654  * two partitions overlap, false otherwise
2655  *
2656  * *lb_cmpval is set to -1, 0, or 1 if the outer partition's lower bound is
2657  * lower than, equal to, or higher than the inner partition's lower bound
2658  * respectively. Likewise, *ub_cmpval is set to -1, 0, or 1 if the outer
2659  * partition's upper bound is lower than, equal to, or higher than the inner
2660  * partition's upper bound respectively.
2661  */
2662 static bool
2663 compare_range_partitions(int partnatts, FmgrInfo *partsupfuncs,
2664  Oid *partcollations,
2665  PartitionRangeBound *outer_lb,
2666  PartitionRangeBound *outer_ub,
2667  PartitionRangeBound *inner_lb,
2668  PartitionRangeBound *inner_ub,
2669  int *lb_cmpval, int *ub_cmpval)
2670 {
2671  /*
2672  * Check if the outer partition's upper bound is lower than the inner
2673  * partition's lower bound; if so the partitions aren't overlapping.
2674  */
2675  if (compare_range_bounds(partnatts, partsupfuncs, partcollations,
2676  outer_ub, inner_lb) < 0)
2677  {
2678  *lb_cmpval = -1;
2679  *ub_cmpval = -1;
2680  return false;
2681  }
2682 
2683  /*
2684  * Check if the outer partition's lower bound is higher than the inner
2685  * partition's upper bound; if so the partitions aren't overlapping.
2686  */
2687  if (compare_range_bounds(partnatts, partsupfuncs, partcollations,
2688  outer_lb, inner_ub) > 0)
2689  {
2690  *lb_cmpval = 1;
2691  *ub_cmpval = 1;
2692  return false;
2693  }
2694 
2695  /* All other cases indicate overlapping partitions. */
2696  *lb_cmpval = compare_range_bounds(partnatts, partsupfuncs, partcollations,
2697  outer_lb, inner_lb);
2698  *ub_cmpval = compare_range_bounds(partnatts, partsupfuncs, partcollations,
2699  outer_ub, inner_ub);
2700  return true;
2701 }
2702 
2703 /*
2704  * get_merged_range_bounds
2705  * Given the bounds of range partitions to be joined, determine the bounds
2706  * of a merged partition produced from the range partitions
2707  *
2708  * *merged_lb and *merged_ub are set to the lower and upper bounds of the
2709  * merged partition.
2710  */
2711 static void
2712 get_merged_range_bounds(int partnatts, FmgrInfo *partsupfuncs,
2713  Oid *partcollations, JoinType jointype,
2714  PartitionRangeBound *outer_lb,
2715  PartitionRangeBound *outer_ub,
2716  PartitionRangeBound *inner_lb,
2717  PartitionRangeBound *inner_ub,
2718  int lb_cmpval, int ub_cmpval,
2719  PartitionRangeBound *merged_lb,
2720  PartitionRangeBound *merged_ub)
2721 {
2722  Assert(compare_range_bounds(partnatts, partsupfuncs, partcollations,
2723  outer_lb, inner_lb) == lb_cmpval);
2724  Assert(compare_range_bounds(partnatts, partsupfuncs, partcollations,
2725  outer_ub, inner_ub) == ub_cmpval);
2726 
2727  switch (jointype)
2728  {
2729  case JOIN_INNER:
2730  case JOIN_SEMI:
2731 
2732  /*
2733  * An INNER/SEMI join will have the rows that fit both sides, so
2734  * the lower bound of the merged partition will be the higher of
2735  * the two lower bounds, and the upper bound of the merged
2736  * partition will be the lower of the two upper bounds.
2737  */
2738  *merged_lb = (lb_cmpval > 0) ? *outer_lb : *inner_lb;
2739  *merged_ub = (ub_cmpval < 0) ? *outer_ub : *inner_ub;
2740  break;
2741 
2742  case JOIN_LEFT:
2743  case JOIN_ANTI:
2744 
2745  /*
2746  * A LEFT/ANTI join will have all the rows from the outer side, so
2747  * the bounds of the merged partition will be the same as the
2748  * outer bounds.
2749  */
2750  *merged_lb = *outer_lb;
2751  *merged_ub = *outer_ub;
2752  break;
2753 
2754  case JOIN_FULL:
2755 
2756  /*
2757  * A FULL join will have all the rows from both sides, so the
2758  * lower bound of the merged partition will be the lower of the
2759  * two lower bounds, and the upper bound of the merged partition
2760  * will be the higher of the two upper bounds.
2761  */
2762  *merged_lb = (lb_cmpval < 0) ? *outer_lb : *inner_lb;
2763  *merged_ub = (ub_cmpval > 0) ? *outer_ub : *inner_ub;
2764  break;
2765 
2766  default:
2767  elog(ERROR, "unrecognized join type: %d", (int) jointype);
2768  }
2769 }
2770 
2771 /*
2772  * add_merged_range_bounds
2773  * Add the bounds of a merged partition to the lists of range bounds
2774  */
2775 static void
2776 add_merged_range_bounds(int partnatts, FmgrInfo *partsupfuncs,
2777  Oid *partcollations,
2778  PartitionRangeBound *merged_lb,
2779  PartitionRangeBound *merged_ub,
2780  int merged_index,
2781  List **merged_datums,
2782  List **merged_kinds,
2783  List **merged_indexes)
2784 {
2785  int cmpval;
2786 
2787  if (!*merged_datums)
2788  {
2789  /* First merged partition */
2790  Assert(!*merged_kinds);
2791  Assert(!*merged_indexes);
2792  cmpval = 1;
2793  }
2794  else
2795  {
2796  PartitionRangeBound prev_ub;
2797 
2798  Assert(*merged_datums);
2799  Assert(*merged_kinds);
2800  Assert(*merged_indexes);
2801 
2802  /* Get the last upper bound. */
2803  prev_ub.index = llast_int(*merged_indexes);
2804  prev_ub.datums = (Datum *) llast(*merged_datums);
2805  prev_ub.kind = (PartitionRangeDatumKind *) llast(*merged_kinds);
2806  prev_ub.lower = false;
2807 
2808  /*
2809  * We pass lower1 = false to partition_rbound_cmp() to prevent it from
2810  * considering the last upper bound to be smaller than the lower bound
2811  * of the merged partition when the values of the two range bounds
2812  * compare equal.
2813  */
2814  cmpval = partition_rbound_cmp(partnatts, partsupfuncs, partcollations,
2815  merged_lb->datums, merged_lb->kind,
2816  false, &prev_ub);
2817  Assert(cmpval >= 0);
2818  }
2819 
2820  /*
2821  * If the lower bound is higher than the last upper bound, add the lower
2822  * bound with the index as -1 indicating that that is a lower bound; else,
2823  * the last upper bound will be reused as the lower bound of the merged
2824  * partition, so skip this.
2825  */
2826  if (cmpval > 0)
2827  {
2828  *merged_datums = lappend(*merged_datums, merged_lb->datums);
2829  *merged_kinds = lappend(*merged_kinds, merged_lb->kind);
2830  *merged_indexes = lappend_int(*merged_indexes, -1);
2831  }
2832 
2833  /* Add the upper bound and index of the merged partition. */
2834  *merged_datums = lappend(*merged_datums, merged_ub->datums);
2835  *merged_kinds = lappend(*merged_kinds, merged_ub->kind);
2836  *merged_indexes = lappend_int(*merged_indexes, merged_index);
2837 }
2838 
2839 /*
2840  * partitions_are_ordered
2841  * Determine whether the partitions described by 'boundinfo' are ordered,
2842  * that is partitions appearing earlier in the PartitionDesc sequence
2843  * contain partition keys strictly less than those appearing later.
2844  * Also, if NULL values are possible, they must come in the last
2845  * partition defined in the PartitionDesc. 'live_parts' marks which
2846  * partitions we should include when checking the ordering. Partitions
2847  * that do not appear in 'live_parts' are ignored.
2848  *
2849  * If out of order, or there is insufficient info to know the order,
2850  * then we return false.
2851  */
2852 bool
2853 partitions_are_ordered(PartitionBoundInfo boundinfo, Bitmapset *live_parts)
2854 {
2855  Assert(boundinfo != NULL);
2856 
2857  switch (boundinfo->strategy)
2858  {
2859  case PARTITION_STRATEGY_RANGE:
2860 
2861  /*
2862  * RANGE-type partitioning guarantees that the partitions can be
2863  * scanned in the order that they're defined in the PartitionDesc
2864  * to provide sequential, non-overlapping ranges of tuples.
2865  * However, if a DEFAULT partition exists and it's contained
2866  * within live_parts, then the partitions are not ordered.
2867  */
2868  if (!partition_bound_has_default(boundinfo) ||
2869  !bms_is_member(boundinfo->default_index, live_parts))
2870  return true;
2871  break;
2872 
2873  case PARTITION_STRATEGY_LIST:
2874 
2875  /*
2876  * LIST partitioned are ordered providing none of live_parts
2877  * overlap with the partitioned table's interleaved partitions.
2878  */
2879  if (!bms_overlap(live_parts, boundinfo->interleaved_parts))
2880  return true;
2881 
2882  break;
2883  case PARTITION_STRATEGY_HASH:
2884  break;
2885  }
2886 
2887  return false;
2888 }
2889 
2890 /*
2891  * check_new_partition_bound
2892  *
2893  * Checks if the new partition's bound overlaps any of the existing partitions
2894  * of parent. Also performs additional checks as necessary per strategy.
2895  */
2896 void
2897 check_new_partition_bound(char *relname, Relation parent,
2898  PartitionBoundSpec *spec, ParseState *pstate)
2899 {
2900  PartitionKey key = RelationGetPartitionKey(parent);
2901  PartitionDesc partdesc = RelationGetPartitionDesc(parent, false);
2902  PartitionBoundInfo boundinfo = partdesc->boundinfo;
2903  int with = -1;
2904  bool overlap = false;
2905  int overlap_location = -1;
2906 
2907  if (spec->is_default)
2908  {
2909  /*
2910  * The default partition bound never conflicts with any other
2911  * partition's; if that's what we're attaching, the only possible
2912  * problem is that one already exists, so check for that and we're
2913  * done.
2914  */
2915  if (boundinfo == NULL || !partition_bound_has_default(boundinfo))
2916  return;
2917 
2918  /* Default partition already exists, error out. */
2919  ereport(ERROR,
2920  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
2921  errmsg("partition \"%s\" conflicts with existing default partition \"%s\"",
2922  relname, get_rel_name(partdesc->oids[boundinfo->default_index])),
2923  parser_errposition(pstate, spec->location)));
2924  }
2925 
2926  switch (key->strategy)
2927  {
2928  case PARTITION_STRATEGY_HASH:
2929  {
2930  Assert(spec->strategy == PARTITION_STRATEGY_HASH);
2931  Assert(spec->remainder >= 0 && spec->remainder < spec->modulus);
2932 
2933  if (partdesc->nparts > 0)
2934  {
2935  int greatest_modulus;
2936  int remainder;
2937  int offset;
2938 
2939  /*
2940  * Check rule that every modulus must be a factor of the
2941  * next larger modulus. (For example, if you have a bunch
2942  * of partitions that all have modulus 5, you can add a
2943  * new partition with modulus 10 or a new partition with
2944  * modulus 15, but you cannot add both a partition with
2945  * modulus 10 and a partition with modulus 15, because 10
2946  * is not a factor of 15.) We need only check the next
2947  * smaller and next larger existing moduli, relying on
2948  * previous enforcement of this rule to be sure that the
2949  * rest are in line.
2950  */
2951 
2952  /*
2953  * Get the greatest (modulus, remainder) pair contained in
2954  * boundinfo->datums that is less than or equal to the
2955  * (spec->modulus, spec->remainder) pair.
2956  */
2957  offset = partition_hash_bsearch(boundinfo,
2958  spec->modulus,
2959  spec->remainder);
2960  if (offset < 0)
2961  {
2962  int next_modulus;
2963 
2964  /*
2965  * All existing moduli are greater or equal, so the
2966  * new one must be a factor of the smallest one, which
2967  * is first in the boundinfo.
2968  */
2969  next_modulus = DatumGetInt32(boundinfo->datums[0][0]);
2970  if (next_modulus % spec->modulus != 0)
2971  ereport(ERROR,
2972  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
2973  errmsg("every hash partition modulus must be a factor of the next larger modulus"),
2974  errdetail("The new modulus %d is not a factor of %d, the modulus of existing partition \"%s\".",
2975  spec->modulus, next_modulus,
2976  get_rel_name(partdesc->oids[0]))));
2977  }
2978  else
2979  {
2980  int prev_modulus;
2981 
2982  /*
2983  * We found the largest (modulus, remainder) pair less
2984  * than or equal to the new one. That modulus must be
2985  * a divisor of, or equal to, the new modulus.
2986  */
2987  prev_modulus = DatumGetInt32(boundinfo->datums[offset][0]);
2988 
2989  if (spec->modulus % prev_modulus != 0)
2990  ereport(ERROR,
2991  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
2992  errmsg("every hash partition modulus must be a factor of the next larger modulus"),
2993  errdetail("The new modulus %d is not divisible by %d, the modulus of existing partition \"%s\".",
2994  spec->modulus,
2995  prev_modulus,
2996  get_rel_name(partdesc->oids[offset]))));
2997 
2998  if (offset + 1 < boundinfo->ndatums)
2999  {
3000  int next_modulus;
3001 
3002  /*
3003  * Look at the next higher (modulus, remainder)
3004  * pair. That could have the same modulus and a
3005  * larger remainder than the new pair, in which
3006  * case we're good. If it has a larger modulus,
3007  * the new modulus must divide that one.
3008  */
3009  next_modulus = DatumGetInt32(boundinfo->datums[offset + 1][0]);
3010 
3011  if (next_modulus % spec->modulus != 0)
3012  ereport(ERROR,
3013  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3014  errmsg("every hash partition modulus must be a factor of the next larger modulus"),
3015  errdetail("The new modulus %d is not a factor of %d, the modulus of existing partition \"%s\".",
3016  spec->modulus, next_modulus,
3017  get_rel_name(partdesc->oids[offset + 1]))));
3018  }
3019  }
3020 
3021  greatest_modulus = boundinfo->nindexes;
3022  remainder = spec->remainder;
3023 
3024  /*
3025  * Normally, the lowest remainder that could conflict with
3026  * the new partition is equal to the remainder specified
3027  * for the new partition, but when the new partition has a
3028  * modulus higher than any used so far, we need to adjust.
3029  */
3030  if (remainder >= greatest_modulus)
3031  remainder = remainder % greatest_modulus;
3032 
3033  /* Check every potentially-conflicting remainder. */
3034  do
3035  {
3036  if (boundinfo->indexes[remainder] != -1)
3037  {
3038  overlap = true;
3039  overlap_location = spec->location;
3040  with = boundinfo->indexes[remainder];
3041  break;
3042  }
3043  remainder += spec->modulus;
3044  } while (remainder < greatest_modulus);
3045  }
3046 
3047  break;
3048  }
3049 
3050  case PARTITION_STRATEGY_LIST:
3051  {
3052  Assert(spec->strategy == PARTITION_STRATEGY_LIST);
3053 
3054  if (partdesc->nparts > 0)
3055  {
3056  ListCell *cell;
3057 
3058  Assert(boundinfo &&
3059  boundinfo->strategy == PARTITION_STRATEGY_LIST &&
3060  (boundinfo->ndatums > 0 ||
3061  partition_bound_accepts_nulls(boundinfo) ||
3062  partition_bound_has_default(boundinfo)));
3063 
3064  foreach(cell, spec->listdatums)
3065  {
3066  Const *val = lfirst_node(Const, cell);
3067 
3068  overlap_location = val->location;
3069  if (!val->constisnull)
3070  {
3071  int offset;
3072  bool equal;
3073 
3074  offset = partition_list_bsearch(&key->partsupfunc[0],
3075  key->partcollation,
3076  boundinfo,
3077  val->constvalue,
3078  &equal);
3079  if (offset >= 0 && equal)
3080  {
3081  overlap = true;
3082  with = boundinfo->indexes[offset];
3083  break;
3084  }
3085  }
3086  else if (partition_bound_accepts_nulls(boundinfo))
3087  {
3088  overlap = true;
3089  with = boundinfo->null_index;
3090  break;
3091  }
3092  }
3093  }
3094 
3095  break;
3096  }
3097 
3098  case PARTITION_STRATEGY_RANGE:
3099  {
3100  PartitionRangeBound *lower,
3101  *upper;
3102  int cmpval;
3103 
3104  Assert(spec->strategy == PARTITION_STRATEGY_RANGE);
3105  lower = make_one_partition_rbound(key, -1, spec->lowerdatums, true);
3106  upper = make_one_partition_rbound(key, -1, spec->upperdatums, false);
3107 
3108  /*
3109  * First check if the resulting range would be empty with
3110  * specified lower and upper bounds. partition_rbound_cmp
3111  * cannot return zero here, since the lower-bound flags are
3112  * different.
3113  */
3114  cmpval = partition_rbound_cmp(key->partnatts,
3115  key->partsupfunc,
3116  key->partcollation,
3117  lower->datums, lower->kind,
3118  true, upper);
3119  Assert(cmpval != 0);
3120  if (cmpval > 0)
3121  {
3122  /* Point to problematic key in the lower datums list. */
3123  PartitionRangeDatum *datum = list_nth(spec->lowerdatums,
3124  cmpval - 1);
3125 
3126  ereport(ERROR,
3127  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3128  errmsg("empty range bound specified for partition \"%s\"",
3129  relname),
3130  errdetail("Specified lower bound %s is greater than or equal to upper bound %s.",
3131  get_range_partbound_string(spec->lowerdatums),
3132  get_range_partbound_string(spec->upperdatums)),
3133  parser_errposition(pstate, datum->location)));
3134  }
3135 
3136  if (partdesc->nparts > 0)
3137  {
3138  int offset;
3139 
3140  Assert(boundinfo &&
3141  boundinfo->strategy == PARTITION_STRATEGY_RANGE &&
3142  (boundinfo->ndatums > 0 ||
3143  partition_bound_has_default(boundinfo)));
3144 
3145  /*
3146  * Test whether the new lower bound (which is treated
3147  * inclusively as part of the new partition) lies inside
3148  * an existing partition, or in a gap.
3149  *
3150  * If it's inside an existing partition, the bound at
3151  * offset + 1 will be the upper bound of that partition,
3152  * and its index will be >= 0.
3153  *
3154  * If it's in a gap, the bound at offset + 1 will be the
3155  * lower bound of the next partition, and its index will
3156  * be -1. This is also true if there is no next partition,
3157  * since the index array is initialised with an extra -1
3158  * at the end.
3159  */
3160  offset = partition_range_bsearch(key->partnatts,
3161  key->partsupfunc,
3162  key->partcollation,
3163  boundinfo, lower,
3164  &cmpval);
3165 
3166  if (boundinfo->indexes[offset + 1] < 0)
3167  {
3168  /*
3169  * Check that the new partition will fit in the gap.
3170  * For it to fit, the new upper bound must be less
3171  * than or equal to the lower bound of the next
3172  * partition, if there is one.
3173  */
3174  if (offset + 1 < boundinfo->ndatums)
3175  {
3176  Datum *datums;
3177  PartitionRangeDatumKind *kind;
3178  bool is_lower;
3179 
3180  datums = boundinfo->datums[offset + 1];
3181  kind = boundinfo->kind[offset + 1];
3182  is_lower = (boundinfo->indexes[offset + 1] == -1);
3183 
3184  cmpval = partition_rbound_cmp(key->partnatts,
3185  key->partsupfunc,
3186  key->partcollation,
3187  datums, kind,
3188  is_lower, upper);
3189  if (cmpval < 0)
3190  {
3191  /*
3192  * Point to problematic key in the upper
3193  * datums list.
3194  */
3195  PartitionRangeDatum *datum =
3196  list_nth(spec->upperdatums, abs(cmpval) - 1);
3197 
3198  /*
3199  * The new partition overlaps with the
3200  * existing partition between offset + 1 and
3201  * offset + 2.
3202  */
3203  overlap = true;
3204  overlap_location = datum->location;
3205  with = boundinfo->indexes[offset + 2];
3206  }
3207  }
3208  }
3209  else
3210  {
3211  /*
3212  * The new partition overlaps with the existing
3213  * partition between offset and offset + 1.
3214  */
3215  PartitionRangeDatum *datum;
3216 
3217  /*
3218  * Point to problematic key in the lower datums list;
3219  * if we have equality, point to the first one.
3220  */
3221  datum = cmpval == 0 ? linitial(spec->lowerdatums) :
3222  list_nth(spec->lowerdatums, abs(cmpval) - 1);
3223  overlap = true;
3224  overlap_location = datum->location;
3225  with = boundinfo->indexes[offset + 1];
3226  }
3227  }
3228 
3229  break;
3230  }
3231  }
3232 
3233  if (overlap)
3234  {
3235  Assert(with >= 0);
3236  ereport(ERROR,
3237  (errcode(ERRCODE_INVALID_OBJECT_DEFINITION),
3238  errmsg("partition \"%s\" would overlap partition \"%s\"",
3239  relname, get_rel_name(partdesc->oids[with])),
3240  parser_errposition(pstate, overlap_location)));
3241  }
3242 }
3243 
3244 /*
3245  * check_default_partition_contents
3246  *
3247  * This function checks if there exists a row in the default partition that
3248  * would properly belong to the new partition being added. If it finds one,
3249  * it throws an error.
3250  */
3251 void
3252 check_default_partition_contents(Relation parent, Relation default_rel,
3253  PartitionBoundSpec *new_spec)
3254 {
3255  List *new_part_constraints;
3256  List *def_part_constraints;
3257  List *all_parts;
3258  ListCell *lc;
3259 
3260  new_part_constraints = (new_spec->strategy == PARTITION_STRATEGY_LIST)
3261  ? get_qual_for_list(parent, new_spec)
3262  : get_qual_for_range(parent, new_spec, false);
3263  def_part_constraints =
3264  get_proposed_default_constraint(new_part_constraints);
3265 
3266  /*
3267  * Map the Vars in the constraint expression from parent's attnos to
3268  * default_rel's.
3269  */
3270  def_part_constraints =
3271  map_partition_varattnos(def_part_constraints, 1, default_rel,
3272  parent);
3273 
3274  /*
3275  * If the existing constraints on the default partition imply that it will
3276  * not contain any row that would belong to the new partition, we can
3277  * avoid scanning the default partition.
3278  */
3279  if (PartConstraintImpliedByRelConstraint(default_rel, def_part_constraints))
3280  {
3281  ereport(DEBUG1,
3282  (errmsg_internal("updated partition constraint for default partition \"%s\" is implied by existing constraints",
3283  RelationGetRelationName(default_rel))));
3284  return;
3285  }
3286 
3287  /*
3288  * Scan the default partition and its subpartitions, and check for rows
3289  * that do not satisfy the revised partition constraints.
3290  */
3291  if (default_rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
3292  all_parts = find_all_inheritors(RelationGetRelid(default_rel),
3293  AccessExclusiveLock, NULL);
3294  else
3295  all_parts = list_make1_oid(RelationGetRelid(default_rel));
3296 
3297  foreach(lc, all_parts)
3298  {
3299  Oid part_relid = lfirst_oid(lc);
3300  Relation part_rel;
3301  Expr *partition_constraint;
3302  EState *estate;
3303  ExprState *partqualstate = NULL;
3304  Snapshot snapshot;
3305  ExprContext *econtext;
3306  TableScanDesc scan;
3307  MemoryContext oldCxt;
3308  TupleTableSlot *tupslot;
3309 
3310  /* Lock already taken above. */
3311  if (part_relid != RelationGetRelid(default_rel))
3312  {
3313  part_rel = table_open(part_relid, NoLock);
3314 
3315  /*
3316  * Map the Vars in the constraint expression from default_rel's
3317  * the sub-partition's.
3318  */
3319  partition_constraint = make_ands_explicit(def_part_constraints);
3320  partition_constraint = (Expr *)
3321  map_partition_varattnos((List *) partition_constraint, 1,
3322  part_rel, default_rel);
3323 
3324  /*
3325  * If the partition constraints on default partition child imply
3326  * that it will not contain any row that would belong to the new
3327  * partition, we can avoid scanning the child table.
3328  */
3329  if (PartConstraintImpliedByRelConstraint(part_rel,
3330  def_part_constraints))
3331  {
3332  ereport(DEBUG1,
3333  (errmsg_internal("updated partition constraint for default partition \"%s\" is implied by existing constraints",
3334  RelationGetRelationName(part_rel))));
3335 
3336  table_close(part_rel, NoLock);
3337  continue;
3338  }
3339  }
3340  else
3341  {
3342  part_rel = default_rel;
3343  partition_constraint = make_ands_explicit(def_part_constraints);
3344  }
3345 
3346  /*
3347  * Only RELKIND_RELATION relations (i.e. leaf partitions) need to be
3348  * scanned.
3349  */
3350  if (part_rel->rd_rel->relkind != RELKIND_RELATION)
3351  {
3352  if (part_rel->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
3353  ereport(WARNING,
3354  (errcode(ERRCODE_CHECK_VIOLATION),
3355  errmsg("skipped scanning foreign table \"%s\" which is a partition of default partition \"%s\"",
3356  RelationGetRelationName(part_rel),
3357  RelationGetRelationName(default_rel))));
3358 
3359  if (RelationGetRelid(default_rel) != RelationGetRelid(part_rel))
3360  table_close(part_rel, NoLock);
3361 
3362  continue;
3363  }
3364 
3365  estate = CreateExecutorState();
3366 
3367  /* Build expression execution states for partition check quals */
3368  partqualstate = ExecPrepareExpr(partition_constraint, estate);
3369 
3370  econtext = GetPerTupleExprContext(estate);
3371  snapshot = RegisterSnapshot(GetLatestSnapshot());
3372  tupslot = table_slot_create(part_rel, &estate->es_tupleTable);
3373  scan = table_beginscan(part_rel, snapshot, 0, NULL);
3374 
3375  /*
3376  * Switch to per-tuple memory context and reset it for each tuple
3377  * produced, so we don't leak memory.
3378  */
3379  oldCxt = MemoryContextSwitchTo(GetPerTupleMemoryContext(estate));
3380 
3381  while (table_scan_getnextslot(scan, ForwardScanDirection, tupslot))
3382  {
3383  econtext->ecxt_scantuple = tupslot;
3384 
3385  if (!ExecCheck(partqualstate, econtext))
3386  ereport(ERROR,
3387  (errcode(ERRCODE_CHECK_VIOLATION),
3388  errmsg("updated partition constraint for default partition \"%s\" would be violated by some row",
3389  RelationGetRelationName(default_rel)),
3390  errtable(default_rel)));
3391 
3392  ResetExprContext(econtext);
3393  CHECK_FOR_INTERRUPTS();
3394  }
3395 
3396  MemoryContextSwitchTo(oldCxt);
3397  table_endscan(scan);
3398  UnregisterSnapshot(snapshot);
3399  ExecDropSingleTupleTableSlot(tupslot);
3400  FreeExecutorState(estate);
3401 
3402  if (RelationGetRelid(default_rel) != RelationGetRelid(part_rel))
3403  table_close(part_rel, NoLock); /* keep the lock until commit */
3404  }
3405 }
3406 
3407 /*
3408  * get_hash_partition_greatest_modulus
3409  *
3410  * Returns the greatest modulus of the hash partition bound.
3411  * This is no longer used in the core code, but we keep it around
3412  * in case external modules are using it.
3413  */
3414 int
3415 get_hash_partition_greatest_modulus(PartitionBoundInfo bound)
3416 {
3417  Assert(bound && bound->strategy == PARTITION_STRATEGY_HASH);
3418  return bound->nindexes;
3419 }
3420 
3421 /*
3422  * make_one_partition_rbound
3423  *
3424  * Return a PartitionRangeBound given a list of PartitionRangeDatum elements
3425  * and a flag telling whether the bound is lower or not. Made into a function
3426  * because there are multiple sites that want to use this facility.
3427  */
3428 static PartitionRangeBound *
3429 make_one_partition_rbound(PartitionKey key, int index, List *datums, bool lower)
3430 {
3431  PartitionRangeBound *bound;
3432  ListCell *lc;
3433  int i;
3434 
3435  Assert(datums != NIL);
3436 
3437  bound = (PartitionRangeBound *) palloc0(sizeof(PartitionRangeBound));
3438  bound->index = index;
3439  bound->datums = (Datum *) palloc0(key->partnatts * sizeof(Datum));
3440  bound->kind = (PartitionRangeDatumKind *) palloc0(key->partnatts *
3441  sizeof(PartitionRangeDatumKind));
3442  bound->lower = lower;
3443 
3444  i = 0;
3445  foreach(lc, datums)
3446  {
3447  PartitionRangeDatum *datum = lfirst_node(PartitionRangeDatum, lc);
3448 
3449  /* What's contained in this range datum? */
3450  bound->kind[i] = datum->kind;
3451 
3452  if (datum->kind == PARTITION_RANGE_DATUM_VALUE)
3453  {
3454  Const *val = castNode(Const, datum->value);
3455 
3456  if (val->constisnull)
3457  elog(ERROR, "invalid range bound datum");
3458  bound->datums[i] = val->constvalue;
3459  }
3460 
3461  i++;
3462  }
3463 
3464  return bound;
3465 }
3466 
3467 /*
3468  * partition_rbound_cmp
3469  *
3470  * For two range bounds this decides whether the 1st one (specified by
3471  * datums1, kind1, and lower1) is <, =, or > the bound specified in *b2.
3472  *
3473  * 0 is returned if they are equal, otherwise a non-zero integer whose sign
3474  * indicates the ordering, and whose absolute value gives the 1-based
3475  * partition key number of the first mismatching column.
3476  *
3477  * partnatts, partsupfunc and partcollation give the number of attributes in the
3478  * bounds to be compared, comparison function to be used and the collations of
3479  * attributes, respectively.
3480  *
3481  * Note that if the values of the two range bounds compare equal, then we take
3482  * into account whether they are upper or lower bounds, and an upper bound is
3483  * considered to be smaller than a lower bound. This is important to the way
3484  * that RelationBuildPartitionDesc() builds the PartitionBoundInfoData
3485  * structure, which only stores the upper bound of a common boundary between
3486  * two contiguous partitions.
3487  */
3488 static int32
3489 partition_rbound_cmp(int partnatts, FmgrInfo *partsupfunc,
3490  Oid *partcollation,
3491  Datum *datums1, PartitionRangeDatumKind *kind1,
3492  bool lower1, PartitionRangeBound *b2)
3493 {
3494  int32 colnum = 0;
3495  int32 cmpval = 0; /* placate compiler */
3496  int i;
3497  Datum *datums2 = b2->datums;
3498  PartitionRangeDatumKind *kind2 = b2->kind;
3499  bool lower2 = b2->lower;
3500 
3501  for (i = 0; i < partnatts; i++)
3502  {
3503  /* Track column number in case we need it for result */
3504  colnum++;
3505 
3506  /*
3507  * First, handle cases where the column is unbounded, which should not
3508  * invoke the comparison procedure, and should not consider any later
3509  * columns. Note that the PartitionRangeDatumKind enum elements
3510  * compare the same way as the values they represent.
3511  */
3512  if (kind1[i] < kind2[i])
3513  return -colnum;
3514  else if (kind1[i] > kind2[i])
3515  return colnum;
3516  else if (kind1[i] != PARTITION_RANGE_DATUM_VALUE)
3517  {
3518  /*
3519  * The column bounds are both MINVALUE or both MAXVALUE. No later
3520  * columns should be considered, but we still need to compare
3521  * whether they are upper or lower bounds.
3522  */
3523  break;
3524  }
3525 
3526  cmpval = DatumGetInt32(FunctionCall2Coll(&partsupfunc[i],
3527  partcollation[i],
3528  datums1[i],
3529  datums2[i]));
3530  if (cmpval != 0)
3531  break;
3532  }
3533 
3534  /*
3535  * If the comparison is anything other than equal, we're done. If they
3536  * compare equal though, we still have to consider whether the boundaries
3537  * are inclusive or exclusive. Exclusive one is considered smaller of the
3538  * two.
3539  */
3540  if (cmpval == 0 && lower1 != lower2)
3541  cmpval = lower1 ? 1 : -1;
3542 
3543  return cmpval == 0 ? 0 : (cmpval < 0 ? -colnum : colnum);
3544 }
3545 
3546 /*
3547  * partition_rbound_datum_cmp
3548  *
3549  * Return whether range bound (specified in rb_datums and rb_kind)
3550  * is <, =, or > partition key of tuple (tuple_datums)
3551  *
3552  * n_tuple_datums, partsupfunc and partcollation give number of attributes in
3553  * the bounds to be compared, comparison function to be used and the collations
3554  * of attributes resp.
3555  */
3556 int32
3557 partition_rbound_datum_cmp(FmgrInfo *partsupfunc, Oid *partcollation,
3558  Datum *rb_datums, PartitionRangeDatumKind *rb_kind,
3559  Datum *tuple_datums, int n_tuple_datums)
3560 {
3561  int i;
3562  int32 cmpval = -1;
3563 
3564  for (i = 0; i < n_tuple_datums; i++)
3565  {
3566  if (rb_kind[i] == PARTITION_RANGE_DATUM_MINVALUE)
3567  return -1;
3568  else if (rb_kind[i] == PARTITION_RANGE_DATUM_MAXVALUE)
3569  return 1;
3570 
3571  cmpval = DatumGetInt32(FunctionCall2Coll(&partsupfunc[i],
3572  partcollation[i],
3573  rb_datums[i],
3574  tuple_datums[i]));
3575  if (cmpval != 0)
3576  break;
3577  }
3578 
3579  return cmpval;
3580 }
3581 
3582 /*
3583  * partition_hbound_cmp
3584  *
3585  * Compares modulus first, then remainder if modulus is equal.
3586  */
3587 static int32
3588 partition_hbound_cmp(int modulus1, int remainder1, int modulus2, int remainder2)
3589 {
3590  if (modulus1 < modulus2)
3591  return -1;
3592  if (modulus1 > modulus2)
3593  return 1;
3594  if (modulus1 == modulus2 && remainder1 != remainder2)
3595  return (remainder1 > remainder2) ? 1 : -1;
3596  return 0;
3597 }
3598 
3599 /*
3600  * partition_list_bsearch
3601  * Returns the index of the greatest bound datum that is less than equal
3602  * to the given value or -1 if all of the bound datums are greater
3603  *
3604  * *is_equal is set to true if the bound datum at the returned index is equal
3605  * to the input value.
3606  */
3607 int
3608 partition_list_bsearch(FmgrInfo *partsupfunc, Oid *partcollation,
3609  PartitionBoundInfo boundinfo,
3610  Datum value, bool *is_equal)
3611 {
3612  int lo,
3613  hi,
3614  mid;
3615 
3616  lo = -1;
3617  hi = boundinfo->ndatums - 1;
3618  while (lo < hi)
3619  {
3620  int32 cmpval;
3621 
3622  mid = (lo + hi + 1) / 2;
3623  cmpval = DatumGetInt32(FunctionCall2Coll(&partsupfunc[0],
3624  partcollation[0],
3625  boundinfo->datums[mid][0],
3626  value));
3627  if (cmpval <= 0)
3628  {
3629  lo = mid;
3630  *is_equal = (cmpval == 0);
3631  if (*is_equal)
3632  break;
3633  }
3634  else
3635  hi = mid - 1;
3636  }
3637 
3638  return lo;
3639 }
3640 
3641 /*
3642  * partition_range_bsearch
3643  * Returns the index of the greatest range bound that is less than or
3644  * equal to the given range bound or -1 if all of the range bounds are
3645  * greater
3646  *
3647  * Upon return from this function, *cmpval is set to 0 if the bound at the
3648  * returned index matches the input range bound exactly, otherwise a
3649  * non-zero integer whose sign indicates the ordering, and whose absolute
3650  * value gives the 1-based partition key number of the first mismatching
3651  * column.
3652  */
3653 static int
3654 partition_range_bsearch(int partnatts, FmgrInfo *partsupfunc,
3655  Oid *partcollation,
3656  PartitionBoundInfo boundinfo,
3657  PartitionRangeBound *probe, int32 *cmpval)
3658 {
3659  int lo,
3660  hi,
3661  mid;
3662 
3663  lo = -1;
3664  hi = boundinfo->ndatums - 1;
3665  while (lo < hi)
3666  {
3667  mid = (lo + hi + 1) / 2;
3668  *cmpval = partition_rbound_cmp(partnatts, partsupfunc,
3669  partcollation,
3670  boundinfo->datums[mid],
3671  boundinfo->kind[mid],
3672  (boundinfo->indexes[mid] == -1),
3673  probe);
3674  if (*cmpval <= 0)
3675  {
3676  lo = mid;
3677  if (*cmpval == 0)
3678  break;
3679  }
3680  else
3681  hi = mid - 1;
3682  }
3683 
3684  return lo;
3685 }
3686 
3687 /*
3688  * partition_range_datum_bsearch
3689  * Returns the index of the greatest range bound that is less than or
3690  * equal to the given tuple or -1 if all of the range bounds are greater
3691  *
3692  * *is_equal is set to true if the range bound at the returned index is equal
3693  * to the input tuple.
3694  */
3695 int
3696 partition_range_datum_bsearch(FmgrInfo *partsupfunc, Oid *partcollation,
3697  PartitionBoundInfo boundinfo,
3698  int nvalues, Datum *values, bool *is_equal)
3699 {
3700  int lo,
3701  hi,
3702  mid;
3703 
3704  lo = -1;
3705  hi = boundinfo->ndatums - 1;
3706  while (lo < hi)
3707  {
3708  int32 cmpval;
3709 
3710  mid = (lo + hi + 1) / 2;
3711  cmpval = partition_rbound_datum_cmp(partsupfunc,
3712  partcollation,
3713  boundinfo->datums[mid],
3714  boundinfo->kind[mid],
3715  values,
3716  nvalues);
3717  if (cmpval <= 0)
3718  {
3719  lo = mid;
3720  *is_equal = (cmpval == 0);
3721 
3722  if (*is_equal)
3723  break;
3724  }
3725  else
3726  hi = mid - 1;
3727  }
3728 
3729  return lo;
3730 }
3731 
3732 /*
3733  * partition_hash_bsearch
3734  * Returns the index of the greatest (modulus, remainder) pair that is
3735  * less than or equal to the given (modulus, remainder) pair or -1 if
3736  * all of them are greater
3737  */
3738 int
3739 partition_hash_bsearch(PartitionBoundInfo boundinfo,
3740  int modulus, int remainder)
3741 {
3742  int lo,
3743  hi,
3744  mid;
3745 
3746  lo = -1;
3747  hi = boundinfo->ndatums - 1;
3748  while (lo < hi)
3749  {
3750  int32 cmpval,
3751  bound_modulus,
3752  bound_remainder;
3753 
3754  mid = (lo + hi + 1) / 2;
3755  bound_modulus = DatumGetInt32(boundinfo->datums[mid][0]);
3756  bound_remainder = DatumGetInt32(boundinfo->datums[mid][1]);
3757  cmpval = partition_hbound_cmp(bound_modulus, bound_remainder,
3758  modulus, remainder);
3759  if (cmpval <= 0)
3760  {
3761  lo = mid;
3762 
3763  if (cmpval == 0)
3764  break;
3765  }
3766  else
3767  hi = mid - 1;
3768  }
3769 
3770  return lo;
3771 }
3772 
3773 /*
3774  * qsort_partition_hbound_cmp
3775  *
3776  * Hash bounds are sorted by modulus, then by remainder.
3777  */
3778 static int32
3779 qsort_partition_hbound_cmp(const void *a, const void *b)
3780 {
3781  const PartitionHashBound *h1 = (const PartitionHashBound *) a;
3782  const PartitionHashBound *h2 = (const PartitionHashBound *) b;
3783 
3784  return partition_hbound_cmp(h1->modulus, h1->remainder,
3785  h2->modulus, h2->remainder);
3786 }
3787 
3788 /*
3789  * qsort_partition_list_value_cmp
3790  *
3791  * Compare two list partition bound datums.
3792  */
3793 static int32
3794 qsort_partition_list_value_cmp(const void *a, const void *b, void *arg)
3795 {
3796  Datum val1 = ((const PartitionListValue *) a)->value,
3797  val2 = ((const PartitionListValue *) b)->value;
3798  PartitionKey key = (PartitionKey) arg;
3799 
3800  return DatumGetInt32(FunctionCall2Coll(&key->partsupfunc[0],
3801  key->partcollation[0],
3802  val1, val2));
3803 }
3804 
3805 /*
3806  * qsort_partition_rbound_cmp
3807  *
3808  * Used when sorting range bounds across all range partitions.
3809  */
3810 static int32
3811 qsort_partition_rbound_cmp(const void *a, const void *b, void *arg)
3812 {
3813  PartitionRangeBound *b1 = (*(PartitionRangeBound *const *) a);
3814  PartitionRangeBound *b2 = (*(PartitionRangeBound *const *) b);
3815  PartitionKey key = (PartitionKey) arg;
3816 
3817  return compare_range_bounds(key->partnatts, key->partsupfunc,
3818  key->partcollation,
3819  b1, b2);
3820 }
3821 
3822 /*
3823  * get_partition_operator
3824  *
3825  * Return oid of the operator of the given strategy for the given partition
3826  * key column. It is assumed that the partitioning key is of the same type as
3827  * the chosen partitioning opclass, or at least binary-compatible. In the
3828  * latter case, *need_relabel is set to true if the opclass is not of a
3829  * polymorphic type (indicating a RelabelType node needed on top), otherwise
3830  * false.
3831  */
3832 static Oid
3833 get_partition_operator(PartitionKey key, int col, StrategyNumber strategy,
3834  bool *need_relabel)
3835 {
3836  Oid operoid;
3837 
3838  /*
3839  * Get the operator in the partitioning opfamily using the opclass'
3840  * declared input type as both left- and righttype.
3841  */
3842  operoid = get_opfamily_member(key->partopfamily[col],
3843  key->partopcintype[col],
3844  key->partopcintype[col],
3845  strategy);
3846  if (!OidIsValid(operoid))
3847  elog(ERROR, "missing operator %d(%u,%u) in partition opfamily %u",
3848  strategy, key->partopcintype[col], key->partopcintype[col],
3849  key->partopfamily[col]);
3850 
3851  /*
3852  * If the partition key column is not of the same type as the operator
3853  * class and not polymorphic, tell caller to wrap the non-Const expression
3854  * in a RelabelType. This matches what parse_coerce.c does.
3855  */
3856  *need_relabel = (key->parttypid[col] != key->partopcintype[col] &&
3857  key->partopcintype[col] != RECORDOID &&
3858  !IsPolymorphicType(key->partopcintype[col]));
3859 
3860  return operoid;
3861 }
3862 
3863 /*
3864  * make_partition_op_expr
3865  * Returns an Expr for the given partition key column with arg1 and
3866  * arg2 as its leftop and rightop, respectively
3867  */
3868 static Expr *
3869 make_partition_op_expr(PartitionKey key, int keynum,
3870  uint16 strategy, Expr *arg1, Expr *arg2)
3871 {
3872  Oid operoid;
3873  bool need_relabel = false;
3874  Expr *result = NULL;
3875 
3876  /* Get the correct btree operator for this partitioning column */
3877  operoid = get_partition_operator(key, keynum, strategy, &need_relabel);
3878 
3879  /*
3880  * Chosen operator may be such that the non-Const operand needs to be
3881  * coerced, so apply the same; see the comment in
3882  * get_partition_operator().
3883  */
3884  if (!IsA(arg1, Const) &&
3885  (need_relabel ||
3886  key->partcollation[keynum] != key->parttypcoll[keynum]))
3887  arg1 = (Expr *) makeRelabelType(arg1,
3888  key->partopcintype[keynum],
3889  -1,
3890  key->partcollation[keynum],
3891  COERCE_EXPLICIT_CAST);
3892 
3893  /* Generate the actual expression */
3894  switch (key->strategy)
3895  {
3896  case PARTITION_STRATEGY_LIST:
3897  {
3898  List *elems = (List *) arg2;
3899  int nelems = list_length(elems);
3900 
3901  Assert(nelems >= 1);
3902  Assert(keynum == 0);
3903 
3904  if (nelems > 1 &&
3905  !type_is_array(key->parttypid[keynum]))
3906  {
3907  ArrayExpr *arrexpr;
3908  ScalarArrayOpExpr *saopexpr;
3909 
3910  /* Construct an ArrayExpr for the right-hand inputs */
3911  arrexpr = makeNode(ArrayExpr);
3912  arrexpr->array_typeid =
3913  get_array_type(key->parttypid[keynum]);
3914  arrexpr->array_collid = key->parttypcoll[keynum];
3915  arrexpr->element_typeid = key->parttypid[keynum];
3916  arrexpr->elements = elems;
3917  arrexpr->multidims = false;
3918  arrexpr->location = -1;
3919 
3920  /* Build leftop = ANY (rightop) */
3921  saopexpr = makeNode(ScalarArrayOpExpr);
3922  saopexpr->opno = operoid;
3923  saopexpr->opfuncid = get_opcode(operoid);
3924  saopexpr->hashfuncid = InvalidOid;
3925  saopexpr->negfuncid = InvalidOid;
3926  saopexpr->useOr = true;
3927  saopexpr->inputcollid = key->partcollation[keynum];
3928  saopexpr->args = list_make2(arg1, arrexpr);
3929  saopexpr->location = -1;
3930 
3931  result = (Expr *) saopexpr;
3932  }
3933  else
3934  {
3935  List *elemops = NIL;
3936  ListCell *lc;
3937 
3938  foreach(lc, elems)
3939  {
3940  Expr *elem = lfirst(lc),
3941  *elemop;
3942 
3943  elemop = make_opclause(operoid,
3944  BOOLOID,
3945  false,
3946  arg1, elem,
3947  InvalidOid,
3948  key->partcollation[keynum]);
3949  elemops = lappend(elemops, elemop);
3950  }
3951 
3952  result = nelems > 1 ? makeBoolExpr(OR_EXPR, elemops, -1) : linitial(elemops);
3953  }
3954  break;
3955  }
3956 
3957  case PARTITION_STRATEGY_RANGE:
3958  result = make_opclause(operoid,
3959  BOOLOID,
3960  false,
3961  arg1, arg2,
3962  InvalidOid,
3963  key->partcollation[keynum]);
3964  break;
3965 
3966  case PARTITION_STRATEGY_HASH:
3967  Assert(false);
3968  break;
3969  }
3970 
3971  return result;
3972 }
3973 
3974 /*
3975  * get_qual_for_hash
3976  *
3977  * Returns a CHECK constraint expression to use as a hash partition's
3978  * constraint, given the parent relation and partition bound structure.
3979  *
3980  * The partition constraint for a hash partition is always a call to the
3981  * built-in function satisfies_hash_partition().
3982  */
3983 static List *
3984 get_qual_for_hash(Relation parent, PartitionBoundSpec *spec)
3985 {
3986  PartitionKey key = RelationGetPartitionKey(parent);
3987  FuncExpr *fexpr;
3988  Node *relidConst;
3989  Node *modulusConst;
3990  Node *remainderConst;
3991  List *args;
3992  ListCell *partexprs_item;
3993  int i;
3994 
3995  /* Fixed arguments. */
3996  relidConst = (Node *) makeConst(OIDOID,
3997  -1,
3998  InvalidOid,
3999  sizeof(Oid),
4000  ObjectIdGetDatum(RelationGetRelid(parent)),
4001  false,
4002  true);
4003 
4004  modulusConst = (Node *) makeConst(INT4OID,
4005  -1,
4006  InvalidOid,
4007  sizeof(int32),
4008  Int32GetDatum(spec->modulus),
4009  false,
4010  true);
4011 
4012  remainderConst = (Node *) makeConst(INT4OID,
4013  -1,
4014  InvalidOid,
4015  sizeof(int32),
4016  Int32GetDatum(spec->remainder),
4017  false,
4018  true);
4019 
4020  args = list_make3(relidConst, modulusConst, remainderConst);
4021  partexprs_item = list_head(key->partexprs);
4022 
4023  /* Add an argument for each key column. */
4024  for (i = 0; i < key->partnatts; i++)
4025  {
4026  Node *keyCol;
4027 
4028  /* Left operand */
4029  if (key->partattrs[i] != 0)
4030  {
4031  keyCol = (Node *) makeVar(1,
4032  key->partattrs[i],
4033  key->parttypid[i],
4034  key->parttypmod[i],
4035  key->parttypcoll[i],
4036  0);
4037  }
4038  else
4039  {
4040  keyCol = (Node *) copyObject(lfirst(partexprs_item));
4041  partexprs_item = lnext(key->partexprs, partexprs_item);
4042  }
4043 
4044  args = lappend(args, keyCol);
4045  }
4046 
4047  fexpr = makeFuncExpr(F_SATISFIES_HASH_PARTITION,
4048  BOOLOID,
4049  args,
4050  InvalidOid,
4051  InvalidOid,
4052  COERCE_EXPLICIT_CALL);
4053 
4054  return list_make1(fexpr);
4055 }
4056 
4057 /*
4058  * get_qual_for_list
4059  *
4060  * Returns an implicit-AND list of expressions to use as a list partition's
4061  * constraint, given the parent relation and partition bound structure.
4062  *
4063  * The function returns NIL for a default partition when it's the only
4064  * partition since in that case there is no constraint.
4065  */
4066 static List *
4067 get_qual_for_list(Relation parent, PartitionBoundSpec *spec)
4068 {
4069  PartitionKey key = RelationGetPartitionKey(parent);
4070  List *result;
4071  Expr *keyCol;
4072  Expr *opexpr;
4073  NullTest *nulltest;
4074  ListCell *cell;
4075  List *elems = NIL;
4076  bool list_has_null = false;
4077 
4078  /*
4079  * Only single-column list partitioning is supported, so we are worried
4080  * only about the partition key with index 0.
4081  */
4082  Assert(key->partnatts == 1);
4083 
4084  /* Construct Var or expression representing the partition column */
4085  if (key->partattrs[0] != 0)
4086  keyCol = (Expr *) makeVar(1,
4087  key->partattrs[0],
4088  key->parttypid[0],
4089  key->parttypmod[0],
4090  key->parttypcoll[0],
4091  0);
4092  else
4093  keyCol = (Expr *) copyObject(linitial(key->partexprs));
4094 
4095  /*
4096  * For default list partition, collect datums for all the partitions. The
4097  * default partition constraint should check that the partition key is
4098  * equal to none of those.
4099  */
4100  if (spec->is_default)
4101  {
4102  int i;
4103  int ndatums = 0;
4104  PartitionDesc pdesc = RelationGetPartitionDesc(parent, false);
4105  PartitionBoundInfo boundinfo = pdesc->boundinfo;
4106 
4107  if (boundinfo)
4108  {
4109  ndatums = boundinfo->ndatums;
4110 
4111  if (partition_bound_accepts_nulls(boundinfo))
4112  list_has_null = true;
4113  }
4114 
4115  /*
4116  * If default is the only partition, there need not be any partition
4117  * constraint on it.
4118  */
4119  if (ndatums == 0 && !list_has_null)
4120  return NIL;
4121 
4122  for (i = 0; i < ndatums; i++)
4123  {
4124  Const *val;
4125 
4126  /*
4127  * Construct Const from known-not-null datum. We must be careful
4128  * to copy the value, because our result has to be able to outlive
4129  * the relcache entry we're copying from.
4130  */
4131  val = makeConst(key->parttypid[0],
4132  key->parttypmod[0],
4133  key->parttypcoll[0],
4134  key->parttyplen[0],
4135  datumCopy(*boundinfo->datums[i],
4136  key->parttypbyval[0],
4137  key->parttyplen[0]),
4138  false, /* isnull */
4139  key->parttypbyval[0]);
4140 
4141  elems = lappend(elems, val);
4142  }
4143  }
4144  else
4145  {
4146  /*
4147  * Create list of Consts for the allowed values, excluding any nulls.
4148  */
4149  foreach(cell, spec->listdatums)
4150  {
4151  Const *val = lfirst_node(Const, cell);
4152 
4153  if (val->constisnull)
4154  list_has_null = true;
4155  else
4156  elems = lappend(elems, copyObject(val));
4157  }
4158  }
4159 
4160  if (elems)
4161  {
4162  /*
4163  * Generate the operator expression from the non-null partition
4164  * values.
4165  */
4166  opexpr = make_partition_op_expr(key, 0, BTEqualStrategyNumber,
4167  keyCol, (Expr *) elems);
4168  }
4169  else
4170  {
4171  /*
4172  * If there are no partition values, we don't need an operator
4173  * expression.
4174  */
4175  opexpr = NULL;
4176  }
4177 
4178  if (!list_has_null)
4179  {
4180  /*
4181  * Gin up a "col IS NOT NULL" test that will be ANDed with the main
4182  * expression. This might seem redundant, but the partition routing
4183  * machinery needs it.
4184  */
4185  nulltest = makeNode(NullTest);
4186  nulltest->arg = keyCol;
4187  nulltest->nulltesttype = IS_NOT_NULL;
4188  nulltest->argisrow = false;
4189  nulltest->location = -1;
4190 
4191  result = opexpr ? list_make2(nulltest, opexpr) : list_make1(nulltest);
4192  }
4193  else
4194  {
4195  /*
4196  * Gin up a "col IS NULL" test that will be OR'd with the main
4197  * expression.
4198  */
4199  nulltest = makeNode(NullTest);
4200  nulltest->arg = keyCol;
4201  nulltest->nulltesttype = IS_NULL;
4202  nulltest->argisrow = false;
4203  nulltest->location = -1;
4204 
4205  if (opexpr)
4206  {
4207  Expr *or;
4208 
4209  or = makeBoolExpr(OR_EXPR, list_make2(nulltest, opexpr), -1);
4210  result = list_make1(or);
4211  }
4212  else
4213  result = list_make1(nulltest);
4214  }
4215 
4216  /*
4217  * Note that, in general, applying NOT to a constraint expression doesn't
4218  * necessarily invert the set of rows it accepts, because NOT (NULL) is
4219  * NULL. However, the partition constraints we construct here never
4220  * evaluate to NULL, so applying NOT works as intended.
4221  */
4222  if (spec->is_default)
4223  {
4224  result = list_make1(make_ands_explicit(result));
4225  result = list_make1(makeBoolExpr(NOT_EXPR, result, -1));
4226  }
4227 
4228  return result;
4229 }
4230 
4231 /*
4232  * get_qual_for_range
4233  *
4234  * Returns an implicit-AND list of expressions to use as a range partition's
4235  * constraint, given the parent relation and partition bound structure.
4236  *
4237  * For a multi-column range partition key, say (a, b, c), with (al, bl, cl)
4238  * as the lower bound tuple and (au, bu, cu) as the upper bound tuple, we
4239  * generate an expression tree of the following form:
4240  *
4241  * (a IS NOT NULL) and (b IS NOT NULL) and (c IS NOT NULL)
4242  * AND
4243  * (a > al OR (a = al AND b > bl) OR (a = al AND b = bl AND c >= cl))
4244  * AND
4245  * (a < au OR (a = au AND b < bu) OR (a = au AND b = bu AND c < cu))
4246  *
4247  * It is often the case that a prefix of lower and upper bound tuples contains
4248  * the same values, for example, (al = au), in which case, we will emit an
4249  * expression tree of the following form:
4250  *
4251  * (a IS NOT NULL) and (b IS NOT NULL) and (c IS NOT NULL)
4252  * AND
4253  * (a = al)
4254  * AND
4255  * (b > bl OR (b = bl AND c >= cl))
4256  * AND
4257  * (b < bu OR (b = bu AND c < cu))
4258  *
4259  * If a bound datum is either MINVALUE or MAXVALUE, these expressions are
4260  * simplified using the fact that any value is greater than MINVALUE and less
4261  * than MAXVALUE. So, for example, if cu = MAXVALUE, c < cu is automatically
4262  * true, and we need not emit any expression for it, and the last line becomes
4263  *
4264  * (b < bu) OR (b = bu), which is simplified to (b <= bu)
4265  *
4266  * In most common cases with only one partition column, say a, the following
4267  * expression tree will be generated: a IS NOT NULL AND a >= al AND a < au
4268  *
4269  * For default partition, it returns the negation of the constraints of all
4270  * the other partitions.
4271  *
4272  * External callers should pass for_default as false; we set it to true only
4273  * when recursing.
4274  */
4275 static List *
4276 get_qual_for_range(Relation parent, PartitionBoundSpec *spec,
4277  bool for_default)
4278 {
4279  List *result = NIL;
4280  ListCell *cell1,
4281  *cell2,
4282  *partexprs_item,
4283  *partexprs_item_saved;
4284  int i,
4285  j;
4286  PartitionRangeDatum *ldatum,
4287  *udatum;
4288  PartitionKey key = RelationGetPartitionKey(parent);
4289  Expr *keyCol;
4290  Const *lower_val,
4291  *upper_val;
4292  List *lower_or_arms,
4293  *upper_or_arms;
4294  int num_or_arms,
4295  current_or_arm;
4296  ListCell *lower_or_start_datum,
4297  *upper_or_start_datum;
4298  bool need_next_lower_arm,
4299  need_next_upper_arm;
4300 
4301  if (spec->is_default)
4302  {
4303  List *or_expr_args = NIL;
4304  PartitionDesc pdesc = RelationGetPartitionDesc(parent, false);
4305  Oid *inhoids = pdesc->oids;
4306  int nparts = pdesc->nparts,
4307  k;
4308 
4309  for (k = 0; k < nparts; k++)
4310  {
4311  Oid inhrelid = inhoids[k];
4312  HeapTuple tuple;
4313  Datum datum;
4314  PartitionBoundSpec *bspec;
4315 
4316  tuple = SearchSysCache1(RELOID, ObjectIdGetDatum(inhrelid));
4317  if (!HeapTupleIsValid(tuple))
4318  elog(ERROR, "cache lookup failed for relation %u", inhrelid);
4319 
4320  datum = SysCacheGetAttrNotNull(RELOID, tuple,
4321  Anum_pg_class_relpartbound);
4322  bspec = (PartitionBoundSpec *)
4323  stringToNode(TextDatumGetCString(datum));
4324  if (!IsA(bspec, PartitionBoundSpec))
4325  elog(ERROR, "expected PartitionBoundSpec");
4326 
4327  if (!bspec->is_default)
4328  {
4329  List *part_qual;
4330 
4331  part_qual = get_qual_for_range(parent, bspec, true);
4332 
4333  /*
4334  * AND the constraints of the partition and add to
4335  * or_expr_args
4336  */
4337  or_expr_args = lappend(or_expr_args, list_length(part_qual) > 1
4338  ? makeBoolExpr(AND_EXPR, part_qual, -1)
4339  : linitial(part_qual));
4340  }
4341  ReleaseSysCache(tuple);
4342  }
4343 
4344  if (or_expr_args != NIL)
4345  {
4346  Expr *other_parts_constr;
4347 
4348  /*
4349  * Combine the constraints obtained for non-default partitions
4350  * using OR. As requested, each of the OR's args doesn't include
4351  * the NOT NULL test for partition keys (which is to avoid its
4352  * useless repetition). Add the same now.
4353  */
4354  other_parts_constr =
4355  makeBoolExpr(AND_EXPR,
4356  lappend(get_range_nulltest(key),
4357  list_length(or_expr_args) > 1
4358  ? makeBoolExpr(OR_EXPR, or_expr_args,
4359  -1)
4360  : linitial(or_expr_args)),
4361  -1);
4362 
4363  /*
4364  * Finally, the default partition contains everything *NOT*
4365  * contained in the non-default partitions.
4366  */
4367  result = list_make1(makeBoolExpr(NOT_EXPR,
4368  list_make1(other_parts_constr), -1));
4369  }
4370 
4371  return result;
4372  }
4373 
4374  /*
4375  * If it is the recursive call for default, we skip the get_range_nulltest
4376  * to avoid accumulating the NullTest on the same keys for each partition.
4377  */
4378  if (!for_default)
4379  result = get_range_nulltest(key);
4380 
4381  /*
4382  * Iterate over the key columns and check if the corresponding lower and
4383  * upper datums are equal using the btree equality operator for the
4384  * column's type. If equal, we emit single keyCol = common_value
4385  * expression. Starting from the first column for which the corresponding
4386  * lower and upper bound datums are not equal, we generate OR expressions
4387  * as shown in the function's header comment.
4388  */
4389  i = 0;
4390  partexprs_item = list_head(key->partexprs);
4391  partexprs_item_saved = partexprs_item; /* placate compiler */
4392  forboth(cell1, spec->lowerdatums, cell2, spec->upperdatums)
4393  {
4394  EState *estate;
4395  MemoryContext oldcxt;
4396  Expr *test_expr;
4397  ExprState *test_exprstate;
4398  Datum test_result;
4399  bool isNull;
4400 
4401  ldatum = lfirst_node(PartitionRangeDatum, cell1);
4402  udatum = lfirst_node(PartitionRangeDatum, cell2);
4403 
4404  /*
4405  * Since get_range_key_properties() modifies partexprs_item, and we
4406  * might need to start over from the previous expression in the later
4407  * part of this function, save away the current value.
4408  */
4409  partexprs_item_saved = partexprs_item;
4410 
4411  get_range_key_properties(key, i, ldatum, udatum,
4412  &partexprs_item,
4413  &keyCol,
4414  &lower_val, &upper_val);
4415 
4416  /*
4417  * If either value is NULL, the corresponding partition bound is
4418  * either MINVALUE or MAXVALUE, and we treat them as unequal, because
4419  * even if they're the same, there is no common value to equate the
4420  * key column with.
4421  */
4422  if (!lower_val || !upper_val)
4423  break;
4424 
4425  /* Create the test expression */
4426  estate = CreateExecutorState();
4427  oldcxt = MemoryContextSwitchTo(estate->es_query_cxt);
4428  test_expr = make_partition_op_expr(key, i, BTEqualStrategyNumber,
4429  (Expr *) lower_val,
4430  (Expr *) upper_val);
4431  fix_opfuncids((Node *) test_expr);
4432  test_exprstate = ExecInitExpr(test_expr, NULL);
4433  test_result = ExecEvalExprSwitchContext(test_exprstate,
4434  GetPerTupleExprContext(estate),
4435  &isNull);
4436  MemoryContextSwitchTo(oldcxt);
4437  FreeExecutorState(estate);
4438 
4439  /* If not equal, go generate the OR expressions */
4440  if (!DatumGetBool(test_result))
4441  break;
4442 
4443  /*
4444  * The bounds for the last key column can't be equal, because such a
4445  * range partition would never be allowed to be defined (it would have
4446  * an empty range otherwise).
4447  */
4448  if (i == key->partnatts - 1)
4449  elog(ERROR, "invalid range bound specification");
4450 
4451  /* Equal, so generate keyCol = lower_val expression */
4452  result = lappend(result,
4453  make_partition_op_expr(key, i, BTEqualStrategyNumber,
4454  keyCol, (Expr *) lower_val));
4455 
4456  i++;
4457  }
4458 
4459  /* First pair of lower_val and upper_val that are not equal. */
4460  lower_or_start_datum = cell1;
4461  upper_or_start_datum = cell2;
4462 
4463  /* OR will have as many arms as there are key columns left. */
4464  num_or_arms = key->partnatts - i;
4465  current_or_arm = 0;
4466  lower_or_arms = upper_or_arms = NIL;
4467  need_next_lower_arm = need_next_upper_arm = true;
4468  while (current_or_arm < num_or_arms)
4469  {
4470  List *lower_or_arm_args = NIL,
4471  *upper_or_arm_args = NIL;
4472 
4473  /* Restart scan of columns from the i'th one */
4474  j = i;
4475  partexprs_item = partexprs_item_saved;
4476 
4477  for_both_cell(cell1, spec->lowerdatums, lower_or_start_datum,
4478  cell2, spec->upperdatums, upper_or_start_datum)
4479  {
4480  PartitionRangeDatum *ldatum_next = NULL,
4481  *udatum_next = NULL;
4482 
4483  ldatum = lfirst_node(PartitionRangeDatum, cell1);
4484  if (lnext(spec->lowerdatums, cell1))
4485  ldatum_next = castNode(PartitionRangeDatum,
4486  lfirst(lnext(spec->lowerdatums, cell1)));
4487  udatum = lfirst_node(PartitionRangeDatum, cell2);
4488  if (lnext(spec->upperdatums, cell2))
4489  udatum_next = castNode(PartitionRangeDatum,
4490  lfirst(lnext(spec->upperdatums, cell2)));
4491  get_range_key_properties(key, j, ldatum, udatum,
4492  &partexprs_item,
4493  &keyCol,
4494  &lower_val, &upper_val);
4495 
4496  if (need_next_lower_arm && lower_val)
4497  {
4498  uint16 strategy;
4499 
4500  /*
4501  * For the non-last columns of this arm, use the EQ operator.
4502  * For the last column of this arm, use GT, unless this is the
4503  * last column of the whole bound check, or the next bound
4504  * datum is MINVALUE, in which case use GE.
4505  */
4506  if (j - i < current_or_arm)
4507  strategy = BTEqualStrategyNumber;
4508  else if (j == key->partnatts - 1 ||
4509  (ldatum_next &&
4510  ldatum_next->kind == PARTITION_RANGE_DATUM_MINVALUE))
4511  strategy = BTGreaterEqualStrategyNumber;
4512  else
4513  strategy = BTGreaterStrategyNumber;
4514 
4515  lower_or_arm_args = lappend(lower_or_arm_args,
4516  make_partition_op_expr(key, j,
4517  strategy,
4518  keyCol,
4519  (Expr *) lower_val));
4520  }
4521 
4522  if (need_next_upper_arm && upper_val)
4523  {
4524  uint16 strategy;
4525 
4526  /*
4527  * For the non-last columns of this arm, use the EQ operator.
4528  * For the last column of this arm, use LT, unless the next
4529  * bound datum is MAXVALUE, in which case use LE.
4530  */
4531  if (j - i < current_or_arm)
4532  strategy = BTEqualStrategyNumber;
4533  else if (udatum_next &&
4534  udatum_next->kind == PARTITION_RANGE_DATUM_MAXVALUE)
4535  strategy = BTLessEqualStrategyNumber;
4536  else
4537  strategy = BTLessStrategyNumber;
4538 
4539  upper_or_arm_args = lappend(upper_or_arm_args,
4540  make_partition_op_expr(key, j,
4541  strategy,
4542  keyCol,
4543  (Expr *) upper_val));
4544  }
4545 
4546  /*
4547  * Did we generate enough of OR's arguments? First arm considers
4548  * the first of the remaining columns, second arm considers first
4549  * two of the remaining columns, and so on.
4550  */
4551  ++j;
4552  if (j - i > current_or_arm)
4553  {
4554  /*
4555  * We must not emit any more arms if the new column that will
4556  * be considered is unbounded, or this one was.
4557  */
4558  if (!lower_val || !ldatum_next ||
4559  ldatum_next->kind != PARTITION_RANGE_DATUM_VALUE)
4560  need_next_lower_arm = false;
4561  if (!upper_val || !udatum_next ||
4562  udatum_next->kind != PARTITION_RANGE_DATUM_VALUE)
4563  need_next_upper_arm = false;
4564  break;
4565  }
4566  }
4567 
4568  if (lower_or_arm_args != NIL)
4569  lower_or_arms = lappend(lower_or_arms,
4570  list_length(lower_or_arm_args) > 1
4571  ? makeBoolExpr(AND_EXPR, lower_or_arm_args, -1)
4572  : linitial(lower_or_arm_args));
4573 
4574  if (upper_or_arm_args != NIL)
4575  upper_or_arms = lappend(upper_or_arms,
4576  list_length(upper_or_arm_args) > 1
4577  ? makeBoolExpr(AND_EXPR, upper_or_arm_args, -1)
4578  : linitial(upper_or_arm_args));
4579 
4580  /* If no work to do in the next iteration, break away. */
4581  if (!need_next_lower_arm && !need_next_upper_arm)
4582  break;
4583 
4584  ++current_or_arm;
4585  }
4586 
4587  /*
4588  * Generate the OR expressions for each of lower and upper bounds (if
4589  * required), and append to the list of implicitly ANDed list of
4590  * expressions.
4591  */
4592  if (lower_or_arms != NIL)
4593  result = lappend(result,
4594  list_length(lower_or_arms) > 1
4595  ? makeBoolExpr(OR_EXPR, lower_or_arms, -1)
4596  : linitial(lower_or_arms));
4597  if (upper_or_arms != NIL)
4598  result = lappend(result,
4599  list_length(upper_or_arms) > 1
4600  ? makeBoolExpr(OR_EXPR, upper_or_arms, -1)
4601  : linitial(upper_or_arms));
4602 
4603  /*
4604  * As noted above, for non-default, we return list with constant TRUE. If
4605  * the result is NIL during the recursive call for default, it implies
4606  * this is the only other partition which can hold every value of the key
4607  * except NULL. Hence we return the NullTest result skipped earlier.
4608  */
4609  if (result == NIL)
4610  result = for_default
4611  ? get_range_nulltest(key)
4612  : list_make1(makeBoolConst(true, false));
4613 
4614  return result;
4615 }
4616 
4617 /*
4618  * get_range_key_properties
4619  * Returns range partition key information for a given column
4620  *
4621  * This is a subroutine for get_qual_for_range, and its API is pretty
4622  * specialized to that caller.
4623  *
4624  * Constructs an Expr for the key column (returned in *keyCol) and Consts
4625  * for the lower and upper range limits (returned in *lower_val and
4626  * *upper_val). For MINVALUE/MAXVALUE limits, NULL is returned instead of
4627  * a Const. All of these structures are freshly palloc'd.
4628  *
4629  * *partexprs_item points to the cell containing the next expression in
4630  * the key->partexprs list, or NULL. It may be advanced upon return.
4631  */
4632 static void
4633 get_range_key_properties(PartitionKey key, int keynum,
4634  PartitionRangeDatum *ldatum,
4635  PartitionRangeDatum *udatum,
4636  ListCell **partexprs_item,
4637  Expr **keyCol,
4638  Const **lower_val, Const **upper_val)
4639 {
4640  /* Get partition key expression for this column */
4641  if (key->partattrs[keynum] != 0)
4642  {
4643  *keyCol = (Expr *) makeVar(1,
4644  key->partattrs[keynum],
4645  key->parttypid[keynum],
4646  key->parttypmod[keynum],
4647  key->parttypcoll[keynum],
4648  0);
4649  }
4650  else
4651  {
4652  if (*partexprs_item == NULL)
4653  elog(ERROR, "wrong number of partition key expressions");
4654  *keyCol = copyObject(lfirst(*partexprs_item));
4655  *partexprs_item = lnext(key->partexprs, *partexprs_item);
4656  }
4657 
4658  /* Get appropriate Const nodes for the bounds */
4659  if (ldatum->kind == PARTITION_RANGE_DATUM_VALUE)
4660  *lower_val = castNode(Const, copyObject(ldatum->value));
4661  else
4662  *lower_val = NULL;
4663 
4664  if (udatum->kind == PARTITION_RANGE_DATUM_VALUE)
4665  *upper_val = castNode(Const, copyObject(udatum->value));
4666  else
4667  *upper_val = NULL;
4668 }
4669 
4670 /*
4671  * get_range_nulltest
4672  *
4673  * A non-default range partition table does not currently allow partition
4674  * keys to be null, so emit an IS NOT NULL expression for each key column.
4675  */
4676 static List *
4677 get_range_nulltest(PartitionKey key)
4678 {
4679  List *result = NIL;
4680  NullTest *nulltest;
4681  ListCell *partexprs_item;
4682  int i;
4683 
4684  partexprs_item = list_head(key->partexprs);
4685  for (i = 0; i < key->partnatts; i++)
4686  {
4687  Expr *keyCol;
4688 
4689  if (key->partattrs[i] != 0)
4690  {
4691  keyCol = (Expr *) makeVar(1,
4692  key->partattrs[i],
4693  key->parttypid[i],
4694  key->parttypmod[i],
4695  key->parttypcoll[i],
4696  0);
4697  }
4698  else
4699  {
4700  if (partexprs_item == NULL)
4701  elog(ERROR, "wrong number of partition key expressions");
4702  keyCol = copyObject(lfirst(partexprs_item));
4703  partexprs_item = lnext(key->partexprs, partexprs_item);
4704  }
4705 
4706  nulltest = makeNode(NullTest);
4707  nulltest->arg = keyCol;
4708  nulltest->nulltesttype = IS_NOT_NULL;
4709  nulltest->argisrow = false;
4710  nulltest->location = -1;
4711  result = lappend(result, nulltest);
4712  }
4713 
4714  return result;
4715 }
4716 
4717 /*
4718  * compute_partition_hash_value
4719  *
4720  * Compute the hash value for given partition key values.
4721  */
4722 uint64
4723 compute_partition_hash_value(int partnatts, FmgrInfo *partsupfunc, Oid *partcollation,
4724  Datum *values, bool *isnull)
4725 {
4726  int i;
4727  uint64 rowHash = 0;
4728  Datum seed = UInt64GetDatum(HASH_PARTITION_SEED);
4729 
4730  for (i = 0; i < partnatts; i++)
4731  {
4732  /* Nulls are just ignored */
4733  if (!isnull[i])
4734  {
4735  Datum hash;
4736 
4737  Assert(OidIsValid(partsupfunc[i].fn_oid));
4738 
4739  /*
4740  * Compute hash for each datum value by calling respective
4741  * datatype-specific hash functions of each partition key
4742  * attribute.
4743  */
4744  hash = FunctionCall2Coll(&partsupfunc[i], partcollation[i],
4745  values[i], seed);
4746 
4747  /* Form a single 64-bit hash value */
4748  rowHash = hash_combine64(rowHash, DatumGetUInt64(hash));
4749  }
4750  }
4751 
4752  return rowHash;
4753 }
4754 
4755 /*
4756  * satisfies_hash_partition
4757  *
4758  * This is an SQL-callable function for use in hash partition constraints.
4759  * The first three arguments are the parent table OID, modulus, and remainder.
4760  * The remaining arguments are the value of the partitioning columns (or
4761  * expressions); these are hashed and the results are combined into a single
4762  * hash value by calling hash_combine64.
4763  *
4764  * Returns true if remainder produced when this computed single hash value is
4765  * divided by the given modulus is equal to given remainder, otherwise false.
4766  * NB: it's important that this never return null, as the constraint machinery
4767  * would consider that to be a "pass".
4768  *
4769  * See get_qual_for_hash() for usage.
4770  */
4771 Datum
4772 satisfies_hash_partition(PG_FUNCTION_ARGS)
4773 {
4774  typedef struct ColumnsHashData
4775  {
4776  Oid relid;
4777  int nkeys;
4778  Oid variadic_type;
4779  int16 variadic_typlen;
4780  bool variadic_typbyval;
4781  char variadic_typalign;
4782  Oid partcollid[PARTITION_MAX_KEYS];
4783  FmgrInfo partsupfunc[FLEXIBLE_ARRAY_MEMBER];
4784  } ColumnsHashData;
4785  Oid parentId;
4786  int modulus;
4787  int remainder;
4788  Datum seed = UInt64GetDatum(HASH_PARTITION_SEED);
4789  ColumnsHashData *my_extra;
4790  uint64 rowHash = 0;
4791 
4792  /* Return false if the parent OID, modulus, or remainder is NULL. */
4793  if (PG_ARGISNULL(0) || PG_ARGISNULL(1) || PG_ARGISNULL(2))
4794  PG_RETURN_BOOL(false);
4795  parentId = PG_GETARG_OID(0);
4796  modulus = PG_GETARG_INT32(1);
4797  remainder = PG_GETARG_INT32(2);
4798 
4799  /* Sanity check modulus and remainder. */
4800  if (modulus <= 0)
4801  ereport(ERROR,
4802  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4803  errmsg("modulus for hash partition must be an integer value greater than zero")));
4804  if (remainder < 0)
4805  ereport(ERROR,
4806  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4807  errmsg("remainder for hash partition must be an integer value greater than or equal to zero")));
4808  if (remainder >= modulus)
4809  ereport(ERROR,
4810  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4811  errmsg("remainder for hash partition must be less than modulus")));
4812 
4813  /*
4814  * Cache hash function information.
4815  */
4816  my_extra = (ColumnsHashData *) fcinfo->flinfo->fn_extra;
4817  if (my_extra == NULL || my_extra->relid != parentId)
4818  {
4819  Relation parent;
4820  PartitionKey key;
4821  int j;
4822 
4823  /* Open parent relation and fetch partition key info */
4824  parent = relation_open(parentId, AccessShareLock);
4825  key = RelationGetPartitionKey(parent);
4826 
4827  /* Reject parent table that is not hash-partitioned. */
4828  if (key == NULL || key->strategy != PARTITION_STRATEGY_HASH)
4829  ereport(ERROR,
4830  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4831  errmsg("\"%s\" is not a hash partitioned table",
4832  get_rel_name(parentId))));
4833 
4834  if (!get_fn_expr_variadic(fcinfo->flinfo))
4835  {
4836  int nargs = PG_NARGS() - 3;
4837 
4838  /* complain if wrong number of column values */
4839  if (key->partnatts != nargs)
4840  ereport(ERROR,
4841  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4842  errmsg("number of partitioning columns (%d) does not match number of partition keys provided (%d)",
4843  key->partnatts, nargs)));
4844 
4845  /* allocate space for our cache */
4846  fcinfo->flinfo->fn_extra =
4847  MemoryContextAllocZero(fcinfo->flinfo->fn_mcxt,
4848  offsetof(ColumnsHashData, partsupfunc) +
4849  sizeof(FmgrInfo) * nargs);
4850  my_extra = (ColumnsHashData *) fcinfo->flinfo->fn_extra;
4851  my_extra->relid = parentId;
4852  my_extra->nkeys = key->partnatts;
4853  memcpy(my_extra->partcollid, key->partcollation,
4854  key->partnatts * sizeof(Oid));
4855 
4856  /* check argument types and save fmgr_infos */
4857  for (j = 0; j < key->partnatts; ++j)
4858  {
4859  Oid argtype = get_fn_expr_argtype(fcinfo->flinfo, j + 3);
4860 
4861  if (argtype != key->parttypid[j] && !IsBinaryCoercible(argtype, key->parttypid[j]))
4862  ereport(ERROR,
4863  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4864  errmsg("column %d of the partition key has type %s, but supplied value is of type %s",
4865  j + 1, format_type_be(key->parttypid[j]), format_type_be(argtype))));
4866 
4867  fmgr_info_copy(&my_extra->partsupfunc[j],
4868  &key->partsupfunc[j],
4869  fcinfo->flinfo->fn_mcxt);
4870  }
4871  }
4872  else
4873  {
4874  ArrayType *variadic_array = PG_GETARG_ARRAYTYPE_P(3);
4875 
4876  /* allocate space for our cache -- just one FmgrInfo in this case */
4877  fcinfo->flinfo->fn_extra =
4878  MemoryContextAllocZero(fcinfo->flinfo->fn_mcxt,
4879  offsetof(ColumnsHashData, partsupfunc) +
4880  sizeof(FmgrInfo));
4881  my_extra = (ColumnsHashData *) fcinfo->flinfo->fn_extra;
4882  my_extra->relid = parentId;
4883  my_extra->nkeys = key->partnatts;
4884  my_extra->variadic_type = ARR_ELEMTYPE(variadic_array);
4885  get_typlenbyvalalign(my_extra->variadic_type,
4886  &my_extra->variadic_typlen,
4887  &my_extra->variadic_typbyval,
4888  &my_extra->variadic_typalign);
4889  my_extra->partcollid[0] = key->partcollation[0];
4890 
4891  /* check argument types */
4892  for (j = 0; j < key->partnatts; ++j)
4893  if (key->parttypid[j] != my_extra->variadic_type)
4894  ereport(ERROR,
4895  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4896  errmsg("column %d of the partition key has type \"%s\", but supplied value is of type \"%s\"",
4897  j + 1,
4898  format_type_be(key->parttypid[j]),
4899  format_type_be(my_extra->variadic_type))));
4900 
4901  fmgr_info_copy(&my_extra->partsupfunc[0],
4902  &key->partsupfunc[0],
4903  fcinfo->flinfo->fn_mcxt);
4904  }
4905 
4906  /* Hold lock until commit */
4907  relation_close(parent, NoLock);
4908  }
4909 
4910  if (!OidIsValid(my_extra->variadic_type))
4911  {
4912  int nkeys = my_extra->nkeys;
4913  int i;
4914 
4915  /*
4916  * For a non-variadic call, neither the number of arguments nor their
4917  * types can change across calls, so avoid the expense of rechecking
4918  * here.
4919  */
4920 
4921  for (i = 0; i < nkeys; i++)
4922  {
4923  Datum hash;
4924 
4925  /* keys start from fourth argument of function. */
4926  int argno = i + 3;
4927 
4928  if (PG_ARGISNULL(argno))
4929  continue;
4930 
4931  hash = FunctionCall2Coll(&my_extra->partsupfunc[i],
4932  my_extra->partcollid[i],
4933  PG_GETARG_DATUM(argno),
4934  seed);
4935 
4936  /* Form a single 64-bit hash value */
4937  rowHash = hash_combine64(rowHash, DatumGetUInt64(hash));
4938  }
4939  }
4940  else
4941  {
4942  ArrayType *variadic_array = PG_GETARG_ARRAYTYPE_P(3);
4943  int i;
4944  int nelems;
4945  Datum *datum;
4946  bool *isnull;
4947 
4948  deconstruct_array(variadic_array,
4949  my_extra->variadic_type,
4950  my_extra->variadic_typlen,
4951  my_extra->variadic_typbyval,
4952  my_extra->variadic_typalign,
4953  &datum, &isnull, &nelems);
4954 
4955  /* complain if wrong number of column values */
4956  if (nelems != my_extra->nkeys)
4957  ereport(ERROR,
4958  (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
4959  errmsg("number of partitioning columns (%d) does not match number of partition keys provided (%d)",
4960  my_extra->nkeys, nelems)));
4961 
4962  for (i = 0; i < nelems; i++)
4963  {
4964  Datum hash;
4965 
4966  if (isnull[i])
4967  continue;
4968 
4969  hash = FunctionCall2Coll(&my_extra->partsupfunc[0],
4970  my_extra->partcollid[0],
4971  datum[i],
4972  seed);
4973 
4974  /* Form a single 64-bit hash value */
4975  rowHash = hash_combine64(rowHash, DatumGetUInt64(hash));
4976  }
4977  }
4978 
4979  PG_RETURN_BOOL(rowHash % modulus == remainder);
4980 }
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Definition: array.h:256
ARR_ELEMTYPE
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generate_unaccent_rules.args
args
Definition: generate_unaccent_rules.py:283
fix_opfuncids
void fix_opfuncids(Node *node)
Definition: nodeFuncs.c:1748
IsA
#define IsA(nodeptr, _type_)
Definition: nodes.h:179
copyObject
#define copyObject(obj)
Definition: nodes.h:244
IS_OUTER_JOIN
#define IS_OUTER_JOIN(jointype)
Definition: nodes.h:348
makeNode
#define makeNode(_type_)
Definition: nodes.h:176
castNode
#define castNode(_type_, nodeptr)
Definition: nodes.h:197
JoinType
JoinType
Definition: nodes.h:299
JOIN_SEMI
@ JOIN_SEMI
Definition: nodes.h:318
JOIN_FULL
@ JOIN_FULL
Definition: nodes.h:306
JOIN_INNER
@ JOIN_INNER
Definition: nodes.h:304
JOIN_RIGHT
@ JOIN_RIGHT
Definition: nodes.h:307
JOIN_LEFT
@ JOIN_LEFT
Definition: nodes.h:305
JOIN_ANTI
@ JOIN_ANTI
Definition: nodes.h:319
lower
Datum lower(PG_FUNCTION_ARGS)
Definition: oracle_compat.c:49
upper
Datum upper(PG_FUNCTION_ARGS)
Definition: oracle_compat.c:80
MemoryContextSwitchTo
static MemoryContext MemoryContextSwitchTo(MemoryContext context)
Definition: palloc.h:138
IsBinaryCoercible
bool IsBinaryCoercible(Oid srctype, Oid targettype)
Definition: parse_coerce.c:2995
parse_coerce.h
parser_errposition
int parser_errposition(ParseState *pstate, int location)
Definition: parse_node.c:111
PARTITION_STRATEGY_HASH
@ PARTITION_STRATEGY_HASH
Definition: parsenodes.h:868
PARTITION_STRATEGY_LIST
@ PARTITION_STRATEGY_LIST
Definition: parsenodes.h:866
PARTITION_STRATEGY_RANGE
@ PARTITION_STRATEGY_RANGE
Definition: parsenodes.h:867
PartitionRangeDatumKind
PartitionRangeDatumKind
Definition: parsenodes.h:917
PARTITION_RANGE_DATUM_MAXVALUE
@ PARTITION_RANGE_DATUM_MAXVALUE
Definition: parsenodes.h:920
PARTITION_RANGE_DATUM_VALUE
@ PARTITION_RANGE_DATUM_VALUE
Definition: parsenodes.h:919
PARTITION_RANGE_DATUM_MINVALUE
@ PARTITION_RANGE_DATUM_MINVALUE
Definition: parsenodes.h:918
partition_range_bsearch
static int partition_range_bsearch(int partnatts, FmgrInfo *partsupfunc, Oid *partcollation, PartitionBoundInfo boundinfo, PartitionRangeBound *probe, int32 *cmpval)
Definition: partbounds.c:3654
process_inner_partition
static int process_inner_partition(PartitionMap *outer_map, PartitionMap *inner_map, bool outer_has_default, bool inner_has_default, int inner_index, int outer_default, JoinType jointype, int *next_index, int *default_index)
Definition: partbounds.c:2063
merge_default_partitions
static void merge_default_partitions(PartitionMap *outer_map, PartitionMap *inner_map, bool outer_has_default, bool inner_has_default, int outer_default, int inner_default, JoinType jointype, int *next_index, int *default_index)
Definition: partbounds.c:2258
init_partition_map
static void init_partition_map(RelOptInfo *rel, PartitionMap *map)
Definition: partbounds.c:1812
get_qual_for_list
static List * get_qual_for_list(Relation parent, PartitionBoundSpec *spec)
Definition: partbounds.c:4067
partition_rbound_datum_cmp
int32 partition_rbound_datum_cmp(FmgrInfo *partsupfunc, Oid *partcollation, Datum *rb_datums, PartitionRangeDatumKind *rb_kind, Datum *tuple_datums, int n_tuple_datums)
Definition: partbounds.c:3557
qsort_partition_rbound_cmp
static int32 qsort_partition_rbound_cmp(const void *a, const void *b, void *arg)
Definition: partbounds.c:3811
partition_rbound_cmp
static int32 partition_rbound_cmp(int partnatts, FmgrInfo *partsupfunc, Oid *partcollation, Datum *datums1, PartitionRangeDatumKind *kind1, bool lower1, PartitionRangeBound *b2)
Definition: partbounds.c:3489
PartitionListValue
struct PartitionListValue PartitionListValue
create_list_bounds
static PartitionBoundInfo create_list_bounds(PartitionBoundSpec **boundspecs, int nparts, PartitionKey key, int **mapping)
Definition: partbounds.c:463
is_dummy_partition
static bool is_dummy_partition(RelOptInfo *rel, int part_index)
Definition: partbounds.c:1844
merge_range_bounds
static PartitionBoundInfo merge_range_bounds(int partnatts, FmgrInfo *partsupfuncs, Oid *partcollations, RelOptInfo *outer_rel, RelOptInfo *inner_rel, JoinType jointype, List **outer_parts, List **inner_parts)
Definition: partbounds.c:1507
PartitionMap
struct PartitionMap PartitionMap
partition_bounds_equal
bool partition_bounds_equal(int partnatts, int16 *parttyplen, bool *parttypbyval, PartitionBoundInfo b1, PartitionBoundInfo b2)
Definition: partbounds.c:897
partition_bounds_merge
PartitionBoundInfo partition_bounds_merge(int partnatts, FmgrInfo *partsupfunc, Oid *partcollation, RelOptInfo *outer_rel, RelOptInfo *inner_rel, JoinType jointype, List **outer_parts, List **inner_parts)
Definition: partbounds.c:1119
merge_matching_partitions
static int merge_matching_partitions(PartitionMap *outer_map, PartitionMap *inner_map, int outer_index, int inner_index, int *next_index)
Definition: partbounds.c:1863
get_qual_for_hash
static List * get_qual_for_hash(Relation parent, PartitionBoundSpec *spec)
Definition: partbounds.c:3984
get_merged_range_bounds
static void get_merged_range_bounds(int partnatts, FmgrInfo *partsupfuncs, Oid *partcollations, JoinType jointype, PartitionRangeBound *outer_lb, PartitionRangeBound *outer_ub, PartitionRangeBound *inner_lb, PartitionRangeBound *inner_ub, int lb_cmpval, int ub_cmpval, PartitionRangeBound *merged_lb, PartitionRangeBound *merged_ub)
Definition: partbounds.c:2712
compare_range_bounds
#define compare_range_bounds(partnatts, partsupfunc, partcollations, bound1, bound2)
Definition: partbounds.c:89
qsort_partition_hbound_cmp
static int32 qsort_partition_hbound_cmp(const void *a, const void *b)
Definition: partbounds.c:3779
free_partition_map
static void free_partition_map(PartitionMap *map)
Definition: partbounds.c:1833
get_non_null_list_datum_count
static int get_non_null_list_datum_count(PartitionBoundSpec **boundspecs, int nparts)
Definition: partbounds.c:437
check_new_partition_bound
void check_new_partition_bound(char *relname, Relation parent, PartitionBoundSpec *spec, ParseState *pstate)
Definition: partbounds.c:2897
fix_merged_indexes
static void fix_merged_indexes(PartitionMap *outer_map, PartitionMap *inner_map, int nmerged, List *merged_indexes)
Definition: partbounds.c:2386
get_qual_from_partbound
List * get_qual_from_partbound(Relation parent, PartitionBoundSpec *spec)
Definition: partbounds.c:250
merge_partition_with_dummy
static int merge_partition_with_dummy(PartitionMap *map, int index, int *next_index)
Definition: partbounds.c:2368
make_partition_op_expr
static Expr * make_partition_op_expr(PartitionKey key, int keynum, uint16 strategy, Expr *arg1, Expr *arg2)
Definition: partbounds.c:3869
partition_bounds_create
PartitionBoundInfo partition_bounds_create(PartitionBoundSpec **boundspecs, int nparts, PartitionKey key, int **mapping)
Definition: partbounds.c:300
PartitionRangeBound
struct PartitionRangeBound PartitionRangeBound
create_hash_bounds
static PartitionBoundInfo create_hash_bounds(PartitionBoundSpec **boundspecs, int nparts, PartitionKey key, int **mapping)
Definition: partbounds.c:348
partitions_are_ordered
bool partitions_are_ordered(PartitionBoundInfo boundinfo, Bitmapset *live_parts)
Definition: partbounds.c:2853
get_qual_for_range
static List * get_qual_for_range(Relation parent, PartitionBoundSpec *spec, bool for_default)
Definition: partbounds.c:4276
merge_list_bounds
static PartitionBoundInfo merge_list_bounds(FmgrInfo *partsupfunc, Oid *partcollation, RelOptInfo *outer_rel, RelOptInfo *inner_rel, JoinType jointype, List **outer_parts, List **inner_parts)
Definition: partbounds.c:1199
generate_matching_part_pairs
static void generate_matching_part_pairs(RelOptInfo *outer_rel, RelOptInfo *inner_rel, PartitionMap *outer_map, PartitionMap *inner_map, int nmerged, List **outer_parts, List **inner_parts)
Definition: partbounds.c:2440
add_merged_range_bounds
static void add_merged_range_bounds(int partnatts, FmgrInfo *partsupfuncs, Oid *partcollations, PartitionRangeBound *merged_lb, PartitionRangeBound *merged_ub, int merged_index, List **merged_datums, List **merged_kinds, List **merged_indexes)
Definition: partbounds.c:2776
compute_partition_hash_value
uint64 compute_partition_hash_value(int partnatts, FmgrInfo *partsupfunc, Oid *partcollation, Datum *values, bool *isnull)
Definition: partbounds.c:4723
partition_range_datum_bsearch
int partition_range_datum_bsearch(FmgrInfo *partsupfunc, Oid *partcollation, PartitionBoundInfo boundinfo, int nvalues, Datum *values, bool *is_equal)
Definition: partbounds.c:3696
satisfies_hash_partition
Datum satisfies_hash_partition(PG_FUNCTION_ARGS)
Definition: partbounds.c:4772
make_one_partition_rbound
static PartitionRangeBound * make_one_partition_rbound(PartitionKey key, int index, List *datums, bool lower)
Definition: partbounds.c:3429
partition_hash_bsearch
int partition_hash_bsearch(PartitionBoundInfo boundinfo, int modulus, int remainder)
Definition: partbounds.c:3739
get_range_key_properties
static void get_range_key_properties(PartitionKey key, int keynum, PartitionRangeDatum *ldatum, PartitionRangeDatum *udatum, ListCell **partexprs_item, Expr **keyCol, Const **lower_val, Const **upper_val)
Definition: partbounds.c:4633
partition_hbound_cmp
static int32 partition_hbound_cmp(int modulus1, int remainder1, int modulus2, int remainder2)
Definition: partbounds.c:3588
create_range_bounds
static PartitionBoundInfo create_range_bounds(PartitionBoundSpec **boundspecs, int nparts, PartitionKey key, int **mapping)
Definition: partbounds.c:678
qsort_partition_list_value_cmp
static int32 qsort_partition_list_value_cmp(const void *a, const void *b, void *arg)
Definition: partbounds.c:3794
build_merged_partition_bounds
static PartitionBoundInfo build_merged_partition_bounds(char strategy, List *merged_datums, List *merged_kinds, List *merged_indexes, int null_index, int default_index)
Definition: partbounds.c:2519
get_hash_partition_greatest_modulus
int get_hash_partition_greatest_modulus(PartitionBoundInfo bound)
Definition: partbounds.c:3415
get_partition_operator
static Oid get_partition_operator(PartitionKey key, int col, StrategyNumber strategy, bool *need_relabel)
Definition: partbounds.c:3833
PartitionHashBound
struct PartitionHashBound PartitionHashBound
compare_range_partitions
static bool compare_range_partitions(int partnatts, FmgrInfo *partsupfuncs, Oid *partcollations, PartitionRangeBound *outer_lb, PartitionRangeBound *outer_ub, PartitionRangeBound *inner_lb, PartitionRangeBound *inner_ub, int *lb_cmpval, int *ub_cmpval)
Definition: partbounds.c:2663
get_range_partition
static int get_range_partition(RelOptInfo *rel, PartitionBoundInfo bi, int *lb_pos, PartitionRangeBound *lb, PartitionRangeBound *ub)
Definition: partbounds.c:2582
merge_null_partitions
static void merge_null_partitions(PartitionMap *outer_map, PartitionMap *inner_map, bool outer_has_null, bool inner_has_null, int outer_null, int inner_null, JoinType jointype, int *next_index, int *null_index)
Definition: partbounds.c:2148
check_default_partition_contents
void check_default_partition_contents(Relation parent, Relation default_rel, PartitionBoundSpec *new_spec)
Definition: partbounds.c:3252
get_range_partition_internal
static int get_range_partition_internal(PartitionBoundInfo bi, int *lb_pos, PartitionRangeBound *lb, PartitionRangeBound *ub)
Definition: partbounds.c:2603
get_range_nulltest
static List * get_range_nulltest(PartitionKey key)
Definition: partbounds.c:4677
process_outer_partition
static int process_outer_partition(PartitionMap *outer_map, PartitionMap *inner_map, bool outer_has_default, bool inner_has_default, int outer_index, int inner_default, JoinType jointype, int *next_index, int *default_index)
Definition: partbounds.c:1981
partition_list_bsearch
int partition_list_bsearch(FmgrInfo *partsupfunc, Oid *partcollation, PartitionBoundInfo boundinfo, Datum value, bool *is_equal)
Definition: partbounds.c:3608
partition_bounds_copy
PartitionBoundInfo partition_bounds_copy(PartitionBoundInfo src, PartitionKey key)
Definition: partbounds.c:1003
partition_bound_has_default
#define partition_bound_has_default(bi)
Definition: partbounds.h:99
partition_bound_accepts_nulls
#define partition_bound_accepts_nulls(bi)
Definition: partbounds.h:98
RelationGetPartitionKey
PartitionKey RelationGetPartitionKey(Relation rel)
Definition: partcache.c:54
PartitionKey
struct PartitionKeyData * PartitionKey
Definition: partdefs.h:18
PartitionBoundInfo
struct PartitionBoundInfoData * PartitionBoundInfo
Definition: partdefs.h:16
RelationGetPartitionDesc
PartitionDesc RelationGetPartitionDesc(Relation rel, bool omit_detached)
Definition: partdesc.c:72
map_partition_varattnos
List * map_partition_varattnos(List *expr, int fromrel_varno, Relation to_rel, Relation from_rel)
Definition: partition.c:221
get_proposed_default_constraint
List * get_proposed_default_constraint(List *new_part_constraints)
Definition: partition.c:369
HASH_PARTITION_SEED
#define HASH_PARTITION_SEED
Definition: partition.h:20
IS_DUMMY_REL
#define IS_DUMMY_REL(r)
Definition: pathnodes.h:1914
arg
void * arg
Definition: pg_backup_utils.c:27
relname
NameData relname
Definition: pg_class.h:38
PARTITION_MAX_KEYS
#define PARTITION_MAX_KEYS
Definition: pg_config_manual.h:74
find_all_inheritors
List * find_all_inheritors(Oid parentrelId, LOCKMODE lockmode, List **numparents)
Definition: pg_inherits.c:256
pg_inherits.h
lfirst
#define lfirst(lc)
Definition: pg_list.h:172
llast_int
#define llast_int(l)
Definition: pg_list.h:199
llast
#define llast(l)
Definition: pg_list.h:198
lfirst_node
#define lfirst_node(type, lc)
Definition: pg_list.h:176
list_length
static int list_length(const List *l)
Definition: pg_list.h:152
NIL
#define NIL
Definition: pg_list.h:68
forboth
#define forboth(cell1, list1, cell2, list2)
Definition: pg_list.h:467
lfirst_int
#define lfirst_int(lc)
Definition: pg_list.h:173
list_make1_oid
#define list_make1_oid(x1)
Definition: pg_list.h:242
list_make1
#define list_make1(x1)
Definition: pg_list.h:212
list_head
static ListCell * list_head(const List *l)
Definition: pg_list.h:128
linitial
#define linitial(l)
Definition: pg_list.h:178
list_make3
#define list_make3(x1, x2, x3)
Definition: pg_list.h:216
for_both_cell
#define for_both_cell(cell1, list1, initcell1, cell2, list2, initcell2)
Definition: pg_list.h:489
list_nth
static void * list_nth(const List *list, int n)
Definition: pg_list.h:299
lnext
static ListCell * lnext(const List *l, const ListCell *c)
Definition: pg_list.h:343
lfirst_oid
#define lfirst_oid(lc)
Definition: pg_list.h:174
list_make2
#define list_make2(x1, x2)
Definition: pg_list.h:214
pg_type.h
qsort_arg
void qsort_arg(void *base, size_t nel, size_t elsize, qsort_arg_comparator cmp, void *arg)
qsort
#define qsort(a, b, c, d)
Definition: port.h:445
DatumGetUInt64
static uint64 DatumGetUInt64(Datum X)
Definition: postgres.h:419
DatumGetBool
static bool DatumGetBool(Datum X)
Definition: postgres.h:90
Datum
uintptr_t Datum
Definition: postgres.h:64
UInt64GetDatum
static Datum UInt64GetDatum(uint64 X)
Definition: postgres.h:436
ObjectIdGetDatum
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:252
Int32GetDatum
static Datum Int32GetDatum(int32 X)
Definition: postgres.h:212
DatumGetInt32
static int32 DatumGetInt32(Datum X)
Definition: postgres.h:202
InvalidOid
#define InvalidOid
Definition: postgres_ext.h:36
Oid
unsigned int Oid
Definition: postgres_ext.h:31
c
char * c
Definition: preproc-cursor.c:31
AND_EXPR
@ AND_EXPR
Definition: primnodes.h:858
OR_EXPR
@ OR_EXPR
Definition: primnodes.h:858
NOT_EXPR
@ NOT_EXPR
Definition: primnodes.h:858
COERCE_EXPLICIT_CAST
@ COERCE_EXPLICIT_CAST
Definition: primnodes.h:662
COERCE_EXPLICIT_CALL
@ COERCE_EXPLICIT_CALL
Definition: primnodes.h:661
IS_NULL
@ IS_NULL
Definition: primnodes.h:1686
IS_NOT_NULL
@ IS_NOT_NULL
Definition: primnodes.h:1686
stringToNode
void * stringToNode(const char *str)
Definition: read.c:90
hash
static unsigned hash(unsigned *uv, int n)
Definition: rege_dfa.c:715
RelationGetRelid
#define RelationGetRelid(relation)
Definition: rel.h:504
RelationGetRelationName
#define RelationGetRelationName(relation)
Definition: rel.h:538
errtable
int errtable(Relation rel)
Definition: relcache.c:5935
get_range_partbound_string
char * get_range_partbound_string(List *bound_datums)
Definition: ruleutils.c:12610
ForwardScanDirection
@ ForwardScanDirection
Definition: sdir.h:28
GetLatestSnapshot
Snapshot GetLatestSnapshot(void)
Definition: snapmgr.c:272
UnregisterSnapshot
void UnregisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:817
RegisterSnapshot
Snapshot RegisterSnapshot(Snapshot snapshot)
Definition: snapmgr.c:775
relation_close
void relation_close(Relation relation, LOCKMODE lockmode)
Definition: relation.c:206
relation_open
Relation relation_open(Oid relationId, LOCKMODE lockmode)
Definition: relation.c:48
StrategyNumber
uint16 StrategyNumber
Definition: stratnum.h:22
BTGreaterStrategyNumber
#define BTGreaterStrategyNumber
Definition: stratnum.h:33
BTLessStrategyNumber
#define BTLessStrategyNumber
Definition: stratnum.h:29
BTEqualStrategyNumber
#define BTEqualStrategyNumber
Definition: stratnum.h:31
BTLessEqualStrategyNumber
#define BTLessEqualStrategyNumber
Definition: stratnum.h:30
BTGreaterEqualStrategyNumber
#define BTGreaterEqualStrategyNumber
Definition: stratnum.h:32
ArrayExpr::location
int location
Definition: primnodes.h:1311
ArrayExpr::elements
List * elements
Definition: primnodes.h:1307
EState::es_query_cxt
MemoryContext es_query_cxt
Definition: execnodes.h:659
EState::es_tupleTable
List * es_tupleTable
Definition: execnodes.h:661
ExprContext::ecxt_scantuple
TupleTableSlot * ecxt_scantuple
Definition: execnodes.h:249
FmgrInfo
Definition: fmgr.h:57
List
Definition: pg_list.h:54
Node
Definition: nodes.h:129
NullTest::nulltesttype
NullTestType nulltesttype
Definition: primnodes.h:1693
NullTest::location
int location
Definition: primnodes.h:1696
NullTest::arg
Expr * arg
Definition: primnodes.h:1692
PartitionBoundInfoData::kind
PartitionRangeDatumKind ** kind
Definition: partbounds.h:84
PartitionBoundInfoData::strategy
PartitionStrategy strategy
Definition: partbounds.h:81
PartitionBoundInfoData::interleaved_parts
Bitmapset * interleaved_parts
Definition: partbounds.h:87
PartitionDescData::boundinfo
PartitionBoundInfo boundinfo
Definition: partdesc.h:38
PartitionMap::did_remapping
bool did_remapping
Definition: partbounds.c:83
PartitionMap::merged
bool * merged
Definition: partbounds.c:81
PartitionMap::old_indexes
int * old_indexes
Definition: partbounds.c:84
PartitionMap::merged_indexes
int * merged_indexes
Definition: partbounds.c:80
PartitionRangeBound::kind
PartitionRangeDatumKind * kind
Definition: partbounds.c:69
PartitionRangeDatum::kind
PartitionRangeDatumKind kind
Definition: parsenodes.h:927
RelationData::rd_rel
Form_pg_class rd_rel
Definition: rel.h:111
index
Definition: type.h:95
ReleaseSysCache
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:868
SearchSysCache1
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:820
SysCacheGetAttrNotNull
Datum SysCacheGetAttrNotNull(int cacheId, HeapTuple tup, AttrNumber attributeNumber)
Definition: syscache.c:1112
RELOID
@ RELOID
Definition: syscache.h:89
table_close
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:126
table_open
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:40
table_slot_create
TupleTableSlot * table_slot_create(Relation relation, List **reglist)
Definition: tableam.c:91
table_beginscan
static TableScanDesc table_beginscan(Relation rel, Snapshot snapshot, int nkeys, struct ScanKeyData *key)
Definition: tableam.h:901
table_endscan
static void table_endscan(TableScanDesc scan)
Definition: tableam.h:1009
table_scan_getnextslot
static bool table_scan_getnextslot(TableScanDesc sscan, ScanDirection direction, TupleTableSlot *slot)
Definition: tableam.h:1050
PartConstraintImpliedByRelConstraint
bool PartConstraintImpliedByRelConstraint(Relation scanrel, List *partConstraint)
Definition: tablecmds.c:18189