PostgreSQL Source Code  git master
partition.c File Reference
#include "postgres.h"
#include "access/attmap.h"
#include "access/genam.h"
#include "access/htup_details.h"
#include "access/sysattr.h"
#include "access/table.h"
#include "catalog/indexing.h"
#include "catalog/partition.h"
#include "catalog/pg_inherits.h"
#include "catalog/pg_partitioned_table.h"
#include "nodes/makefuncs.h"
#include "optimizer/optimizer.h"
#include "partitioning/partbounds.h"
#include "rewrite/rewriteManip.h"
#include "utils/fmgroids.h"
#include "utils/partcache.h"
#include "utils/rel.h"
#include "utils/syscache.h"
Include dependency graph for partition.c:

Go to the source code of this file.

Functions

static Oid get_partition_parent_worker (Relation inhRel, Oid relid, bool *detach_pending)
 
static void get_partition_ancestors_worker (Relation inhRel, Oid relid, List **ancestors)
 
Oid get_partition_parent (Oid relid, bool even_if_detached)
 
Listget_partition_ancestors (Oid relid)
 
Oid index_get_partition (Relation partition, Oid indexId)
 
Listmap_partition_varattnos (List *expr, int fromrel_varno, Relation to_rel, Relation from_rel)
 
bool has_partition_attrs (Relation rel, Bitmapset *attnums, bool *used_in_expr)
 
Oid get_default_partition_oid (Oid parentId)
 
void update_default_partition_oid (Oid parentId, Oid defaultPartId)
 
Listget_proposed_default_constraint (List *new_part_constraints)
 

Function Documentation

◆ get_default_partition_oid()

Oid get_default_partition_oid ( Oid  parentId)

Definition at line 313 of file partition.c.

References GETSTRUCT, HeapTupleIsValid, InvalidOid, ObjectIdGetDatum, PARTRELID, ReleaseSysCache(), and SearchSysCache1().

Referenced by heap_drop_with_catalog(), and RelationBuildPartitionDesc().

314 {
315  HeapTuple tuple;
316  Oid defaultPartId = InvalidOid;
317 
318  tuple = SearchSysCache1(PARTRELID, ObjectIdGetDatum(parentId));
319 
320  if (HeapTupleIsValid(tuple))
321  {
322  Form_pg_partitioned_table part_table_form;
323 
324  part_table_form = (Form_pg_partitioned_table) GETSTRUCT(tuple);
325  defaultPartId = part_table_form->partdefid;
326  ReleaseSysCache(tuple);
327  }
328 
329  return defaultPartId;
330 }
#define GETSTRUCT(TUP)
Definition: htup_details.h:654
unsigned int Oid
Definition: postgres_ext.h:31
FormData_pg_partitioned_table * Form_pg_partitioned_table
#define ObjectIdGetDatum(X)
Definition: postgres.h:551
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1127
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1175
#define InvalidOid
Definition: postgres_ext.h:36
#define HeapTupleIsValid(tuple)
Definition: htup.h:78

◆ get_partition_ancestors()

List* get_partition_ancestors ( Oid  relid)

Definition at line 133 of file partition.c.

References AccessShareLock, get_partition_ancestors_worker(), NIL, table_close(), and table_open().

Referenced by ExecInitPartitionInfo(), get_rel_sync_entry(), GetRelationPublicationActions(), index_concurrently_swap(), pg_partition_ancestors(), pg_partition_root(), pg_partition_tree(), and pgstat_report_anl_ancestors().

134 {
135  List *result = NIL;
136  Relation inhRel;
137 
138  inhRel = table_open(InheritsRelationId, AccessShareLock);
139 
140  get_partition_ancestors_worker(inhRel, relid, &result);
141 
142  table_close(inhRel, AccessShareLock);
143 
144  return result;
145 }
#define NIL
Definition: pg_list.h:65
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:167
#define AccessShareLock
Definition: lockdefs.h:36
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39
Definition: pg_list.h:50
static void get_partition_ancestors_worker(Relation inhRel, Oid relid, List **ancestors)
Definition: partition.c:152

◆ get_partition_ancestors_worker()

static void get_partition_ancestors_worker ( Relation  inhRel,
Oid  relid,
List **  ancestors 
)
static

Definition at line 152 of file partition.c.

References get_partition_parent_worker(), InvalidOid, and lappend_oid().

Referenced by get_partition_ancestors().

153 {
154  Oid parentOid;
155  bool detach_pending;
156 
157  /*
158  * Recursion ends at the topmost level, ie., when there's no parent; also
159  * when the partition is being detached.
160  */
161  parentOid = get_partition_parent_worker(inhRel, relid, &detach_pending);
162  if (parentOid == InvalidOid || detach_pending)
163  return;
164 
165  *ancestors = lappend_oid(*ancestors, parentOid);
166  get_partition_ancestors_worker(inhRel, parentOid, ancestors);
167 }
static Oid get_partition_parent_worker(Relation inhRel, Oid relid, bool *detach_pending)
Definition: partition.c:86
unsigned int Oid
Definition: postgres_ext.h:31
List * lappend_oid(List *list, Oid datum)
Definition: list.c:372
#define InvalidOid
Definition: postgres_ext.h:36
static void get_partition_ancestors_worker(Relation inhRel, Oid relid, List **ancestors)
Definition: partition.c:152

◆ get_partition_parent()

Oid get_partition_parent ( Oid  relid,
bool  even_if_detached 
)

Definition at line 54 of file partition.c.

References AccessShareLock, elog, ERROR, get_partition_parent_worker(), OidIsValid, table_close(), and table_open().

Referenced by ATExecAttachPartitionIdx(), ATExecDropNotNull(), DetachPartitionFinalize(), generate_partition_qual(), heap_drop_with_catalog(), index_get_partition(), RangeVarCallbackForDropRelation(), and validatePartitionedIndex().

55 {
56  Relation catalogRelation;
57  Oid result;
58  bool detach_pending;
59 
60  catalogRelation = table_open(InheritsRelationId, AccessShareLock);
61 
62  result = get_partition_parent_worker(catalogRelation, relid,
63  &detach_pending);
64 
65  if (!OidIsValid(result))
66  elog(ERROR, "could not find tuple for parent of relation %u", relid);
67 
68  if (detach_pending && !even_if_detached)
69  elog(ERROR, "relation %u has no parent because it's being detached",
70  relid);
71 
72  table_close(catalogRelation, AccessShareLock);
73 
74  return result;
75 }
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:167
#define AccessShareLock
Definition: lockdefs.h:36
static Oid get_partition_parent_worker(Relation inhRel, Oid relid, bool *detach_pending)
Definition: partition.c:86
unsigned int Oid
Definition: postgres_ext.h:31
#define OidIsValid(objectId)
Definition: c.h:710
#define ERROR
Definition: elog.h:46
#define elog(elevel,...)
Definition: elog.h:232
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39

◆ get_partition_parent_worker()

static Oid get_partition_parent_worker ( Relation  inhRel,
Oid  relid,
bool detach_pending 
)
static

Definition at line 86 of file partition.c.

References BTEqualStrategyNumber, GETSTRUCT, HeapTupleIsValid, InheritsRelidSeqnoIndexId, Int32GetDatum, InvalidOid, sort-test::key, ObjectIdGetDatum, ScanKeyInit(), systable_beginscan(), systable_endscan(), and systable_getnext().

Referenced by get_partition_ancestors_worker(), and get_partition_parent().

87 {
88  SysScanDesc scan;
89  ScanKeyData key[2];
90  Oid result = InvalidOid;
91  HeapTuple tuple;
92 
93  *detach_pending = false;
94 
95  ScanKeyInit(&key[0],
96  Anum_pg_inherits_inhrelid,
97  BTEqualStrategyNumber, F_OIDEQ,
98  ObjectIdGetDatum(relid));
99  ScanKeyInit(&key[1],
100  Anum_pg_inherits_inhseqno,
101  BTEqualStrategyNumber, F_INT4EQ,
102  Int32GetDatum(1));
103 
104  scan = systable_beginscan(inhRel, InheritsRelidSeqnoIndexId, true,
105  NULL, 2, key);
106  tuple = systable_getnext(scan);
107  if (HeapTupleIsValid(tuple))
108  {
110 
111  /* Let caller know of partition being detached */
112  if (form->inhdetachpending)
113  *detach_pending = true;
114  result = form->inhparent;
115  }
116 
117  systable_endscan(scan);
118 
119  return result;
120 }
void systable_endscan(SysScanDesc sysscan)
Definition: genam.c:595
#define GETSTRUCT(TUP)
Definition: htup_details.h:654
#define InheritsRelidSeqnoIndexId
Definition: pg_inherits.h:48
unsigned int Oid
Definition: postgres_ext.h:31
SysScanDesc systable_beginscan(Relation heapRelation, Oid indexId, bool indexOK, Snapshot snapshot, int nkeys, ScanKey key)
Definition: genam.c:383
HeapTuple systable_getnext(SysScanDesc sysscan)
Definition: genam.c:502
#define ObjectIdGetDatum(X)
Definition: postgres.h:551
#define InvalidOid
Definition: postgres_ext.h:36
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
FormData_pg_inherits * Form_pg_inherits
Definition: pg_inherits.h:45
#define Int32GetDatum(X)
Definition: postgres.h:523
void ScanKeyInit(ScanKey entry, AttrNumber attributeNumber, StrategyNumber strategy, RegProcedure procedure, Datum argument)
Definition: scankey.c:76
#define BTEqualStrategyNumber
Definition: stratnum.h:31

◆ get_proposed_default_constraint()

List* get_proposed_default_constraint ( List new_part_constraints)

Definition at line 368 of file partition.c.

References canonicalize_qual(), eval_const_expressions(), list_make1, make_ands_explicit(), make_ands_implicit(), makeBoolExpr(), and NOT_EXPR.

Referenced by ATExecAttachPartition(), and check_default_partition_contents().

369 {
370  Expr *defPartConstraint;
371 
372  defPartConstraint = make_ands_explicit(new_part_constraints);
373 
374  /*
375  * Derive the partition constraints of default partition by negating the
376  * given partition constraints. The partition constraint never evaluates
377  * to NULL, so negating it like this is safe.
378  */
379  defPartConstraint = makeBoolExpr(NOT_EXPR,
380  list_make1(defPartConstraint),
381  -1);
382 
383  /* Simplify, to put the negated expression into canonical form */
384  defPartConstraint =
385  (Expr *) eval_const_expressions(NULL,
386  (Node *) defPartConstraint);
387  defPartConstraint = canonicalize_qual(defPartConstraint, true);
388 
389  return make_ands_implicit(defPartConstraint);
390 }
Definition: nodes.h:539
Node * eval_const_expressions(PlannerInfo *root, Node *node)
Definition: clauses.c:2090
Expr * makeBoolExpr(BoolExprType boolop, List *args, int location)
Definition: makefuncs.c:369
#define list_make1(x1)
Definition: pg_list.h:206
Expr * canonicalize_qual(Expr *qual, bool is_check)
Definition: prepqual.c:293
Expr * make_ands_explicit(List *andclauses)
Definition: makefuncs.c:708
List * make_ands_implicit(Expr *clause)
Definition: makefuncs.c:719

◆ has_partition_attrs()

bool has_partition_attrs ( Relation  rel,
Bitmapset attnums,
bool used_in_expr 
)

Definition at line 253 of file partition.c.

References bms_is_member(), bms_overlap(), FirstLowInvalidHeapAttributeNumber, get_partition_col_attnum(), get_partition_exprs(), get_partition_natts(), i, sort-test::key, lfirst, list_head(), lnext(), pull_varattnos(), RelationData::rd_rel, and RelationGetPartitionKey().

Referenced by ATExecDropColumn(), ATPrepAlterColumnType(), and expand_partitioned_rtentry().

254 {
256  int partnatts;
257  List *partexprs;
258  ListCell *partexprs_item;
259  int i;
260 
261  if (attnums == NULL || rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
262  return false;
263 
264  key = RelationGetPartitionKey(rel);
265  partnatts = get_partition_natts(key);
266  partexprs = get_partition_exprs(key);
267 
268  partexprs_item = list_head(partexprs);
269  for (i = 0; i < partnatts; i++)
270  {
271  AttrNumber partattno = get_partition_col_attnum(key, i);
272 
273  if (partattno != 0)
274  {
276  attnums))
277  {
278  if (used_in_expr)
279  *used_in_expr = false;
280  return true;
281  }
282  }
283  else
284  {
285  /* Arbitrary expression */
286  Node *expr = (Node *) lfirst(partexprs_item);
287  Bitmapset *expr_attrs = NULL;
288 
289  /* Find all attributes referenced */
290  pull_varattnos(expr, 1, &expr_attrs);
291  partexprs_item = lnext(partexprs, partexprs_item);
292 
293  if (bms_overlap(attnums, expr_attrs))
294  {
295  if (used_in_expr)
296  *used_in_expr = true;
297  return true;
298  }
299  }
300  }
301 
302  return false;
303 }
static ListCell * lnext(const List *l, const ListCell *c)
Definition: pg_list.h:322
Definition: nodes.h:539
static int get_partition_natts(PartitionKey key)
Definition: partcache.h:64
#define FirstLowInvalidHeapAttributeNumber
Definition: sysattr.h:27
PartitionKey RelationGetPartitionKey(Relation rel)
Definition: partcache.c:54
Form_pg_class rd_rel
Definition: rel.h:109
void pull_varattnos(Node *node, Index varno, Bitmapset **varattnos)
Definition: var.c:246
static List * get_partition_exprs(PartitionKey key)
Definition: partcache.h:70
static ListCell * list_head(const List *l)
Definition: pg_list.h:125
static int16 get_partition_col_attnum(PartitionKey key, int col)
Definition: partcache.h:79
#define lfirst(lc)
Definition: pg_list.h:169
bool bms_overlap(const Bitmapset *a, const Bitmapset *b)
Definition: bitmapset.c:494
int i
Definition: pg_list.h:50
bool bms_is_member(int x, const Bitmapset *a)
Definition: bitmapset.c:427
int16 AttrNumber
Definition: attnum.h:21

◆ index_get_partition()

Oid index_get_partition ( Relation  partition,
Oid  indexId 
)

Definition at line 175 of file partition.c.

References elog, ERROR, get_partition_parent(), GETSTRUCT, HeapTupleIsValid, InvalidOid, lfirst_oid, list_free(), ObjectIdGetDatum, RelationGetIndexList(), ReleaseSysCache(), RELOID, and SearchSysCache1().

Referenced by addFkRecurseReferenced(), CloneFkReferenced(), and refuseDupeIndexAttach().

176 {
177  List *idxlist = RelationGetIndexList(partition);
178  ListCell *l;
179 
180  foreach(l, idxlist)
181  {
182  Oid partIdx = lfirst_oid(l);
183  HeapTuple tup;
184  Form_pg_class classForm;
185  bool ispartition;
186 
187  tup = SearchSysCache1(RELOID, ObjectIdGetDatum(partIdx));
188  if (!HeapTupleIsValid(tup))
189  elog(ERROR, "cache lookup failed for relation %u", partIdx);
190  classForm = (Form_pg_class) GETSTRUCT(tup);
191  ispartition = classForm->relispartition;
192  ReleaseSysCache(tup);
193  if (!ispartition)
194  continue;
195  if (get_partition_parent(partIdx, false) == indexId)
196  {
197  list_free(idxlist);
198  return partIdx;
199  }
200  }
201 
202  list_free(idxlist);
203  return InvalidOid;
204 }
#define GETSTRUCT(TUP)
Definition: htup_details.h:654
Oid get_partition_parent(Oid relid, bool even_if_detached)
Definition: partition.c:54
unsigned int Oid
Definition: postgres_ext.h:31
#define ObjectIdGetDatum(X)
Definition: postgres.h:551
#define ERROR
Definition: elog.h:46
HeapTuple SearchSysCache1(int cacheId, Datum key1)
Definition: syscache.c:1127
void ReleaseSysCache(HeapTuple tuple)
Definition: syscache.c:1175
#define InvalidOid
Definition: postgres_ext.h:36
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
List * RelationGetIndexList(Relation relation)
Definition: relcache.c:4570
FormData_pg_class * Form_pg_class
Definition: pg_class.h:153
void list_free(List *list)
Definition: list.c:1391
#define elog(elevel,...)
Definition: elog.h:232
Definition: pg_list.h:50
#define lfirst_oid(lc)
Definition: pg_list.h:171

◆ map_partition_varattnos()

List* map_partition_varattnos ( List expr,
int  fromrel_varno,
Relation  to_rel,
Relation  from_rel 
)

Definition at line 221 of file partition.c.

References build_attrmap_by_name(), map_variable_attnos(), NIL, RelationGetDescr, and RelationGetForm.

Referenced by ATExecAttachPartition(), check_default_partition_contents(), CloneRowTriggersToPartition(), CreateTrigger(), generate_partition_qual(), and QueuePartitionConstraintValidation().

223 {
224  if (expr != NIL)
225  {
226  AttrMap *part_attmap;
227  bool found_whole_row;
228 
229  part_attmap = build_attrmap_by_name(RelationGetDescr(to_rel),
230  RelationGetDescr(from_rel));
231  expr = (List *) map_variable_attnos((Node *) expr,
232  fromrel_varno, 0,
233  part_attmap,
234  RelationGetForm(to_rel)->reltype,
235  &found_whole_row);
236  /* Since we provided a to_rowtype, we may ignore found_whole_row. */
237  }
238 
239  return expr;
240 }
#define NIL
Definition: pg_list.h:65
#define RelationGetDescr(relation)
Definition: rel.h:495
#define RelationGetForm(relation)
Definition: rel.h:463
Definition: nodes.h:539
Node * map_variable_attnos(Node *node, int target_varno, int sublevels_up, const AttrMap *attno_map, Oid to_rowtype, bool *found_whole_row)
Definition: attmap.h:34
AttrMap * build_attrmap_by_name(TupleDesc indesc, TupleDesc outdesc)
Definition: attmap.c:174
Definition: pg_list.h:50

◆ update_default_partition_oid()

void update_default_partition_oid ( Oid  parentId,
Oid  defaultPartId 
)

Definition at line 338 of file partition.c.

References CatalogTupleUpdate(), elog, ERROR, GETSTRUCT, heap_freetuple(), HeapTupleIsValid, ObjectIdGetDatum, PARTRELID, RowExclusiveLock, SearchSysCacheCopy1, HeapTupleData::t_self, table_close(), and table_open().

Referenced by DetachPartitionFinalize(), heap_drop_with_catalog(), and StorePartitionBound().

339 {
340  HeapTuple tuple;
341  Relation pg_partitioned_table;
342  Form_pg_partitioned_table part_table_form;
343 
344  pg_partitioned_table = table_open(PartitionedRelationId, RowExclusiveLock);
345 
346  tuple = SearchSysCacheCopy1(PARTRELID, ObjectIdGetDatum(parentId));
347 
348  if (!HeapTupleIsValid(tuple))
349  elog(ERROR, "cache lookup failed for partition key of relation %u",
350  parentId);
351 
352  part_table_form = (Form_pg_partitioned_table) GETSTRUCT(tuple);
353  part_table_form->partdefid = defaultPartId;
354  CatalogTupleUpdate(pg_partitioned_table, &tuple->t_self, tuple);
355 
356  heap_freetuple(tuple);
357  table_close(pg_partitioned_table, RowExclusiveLock);
358 }
void table_close(Relation relation, LOCKMODE lockmode)
Definition: table.c:167
#define GETSTRUCT(TUP)
Definition: htup_details.h:654
void heap_freetuple(HeapTuple htup)
Definition: heaptuple.c:1338
FormData_pg_partitioned_table * Form_pg_partitioned_table
#define ObjectIdGetDatum(X)
Definition: postgres.h:551
#define ERROR
Definition: elog.h:46
ItemPointerData t_self
Definition: htup.h:65
#define RowExclusiveLock
Definition: lockdefs.h:38
#define HeapTupleIsValid(tuple)
Definition: htup.h:78
void CatalogTupleUpdate(Relation heapRel, ItemPointer otid, HeapTuple tup)
Definition: indexing.c:301
#define SearchSysCacheCopy1(cacheId, key1)
Definition: syscache.h:175
#define elog(elevel,...)
Definition: elog.h:232
Relation table_open(Oid relationId, LOCKMODE lockmode)
Definition: table.c:39