specified check constraints). But the
database will not assume that the constraint holds for all rows in
the table, until it is validated by using the <literal>VALIDATE
- CONSTRAINT</literal> option.
+ CONSTRAINT</literal> option. Foreign key constraints on partitioned
+ tables may not be declared <literal>NOT VALID</literal> at present.
</para>
<para>
</para>
<para>
- Partitioned tables do not support <literal>EXCLUDE</literal> or
- <literal>FOREIGN KEY</literal> constraints; however, you can define
- these constraints on individual partitions.
+ Partitioned tables do not support <literal>EXCLUDE</literal> constraints;
+ however, you can define these constraints on individual partitions.
+ Also, while it's possible to define <literal>PRIMARY KEY</literal>
+ constraints on partitioned tables, it is not supported to create foreign
+ keys cannot that reference them. This restriction will be lifted in a
+ future release.
</para>
</listitem>
must have <literal>REFERENCES</literal> permission on the referenced table
(either the whole table, or the specific referenced columns).
Note that foreign key constraints cannot be defined between temporary
- tables and permanent tables.
+ tables and permanent tables. Also note that while it is possible to
+ define a foreign key on a partitioned table, it is not possible to
+ declare a foreign key that references a partitioned table.
</para>
<para>
#include "catalog/pg_operator.h"
#include "catalog/pg_type.h"
#include "commands/defrem.h"
+#include "commands/tablecmds.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/fmgroids.h"
return conOid;
}
+/*
+ * CloneForeignKeyConstraints
+ * Clone foreign keys from a partitioned table to a newly acquired
+ * partition.
+ *
+ * relationId is a partition of parentId, so we can be certain that it has the
+ * same columns with the same datatypes. The columns may be in different
+ * order, though.
+ *
+ * The *cloned list is appended ClonedConstraint elements describing what was
+ * created.
+ */
+void
+CloneForeignKeyConstraints(Oid parentId, Oid relationId, List **cloned)
+{
+ Relation pg_constraint;
+ Relation parentRel;
+ Relation rel;
+ ScanKeyData key;
+ SysScanDesc scan;
+ TupleDesc tupdesc;
+ HeapTuple tuple;
+ AttrNumber *attmap;
+
+ parentRel = heap_open(parentId, NoLock); /* already got lock */
+ /* see ATAddForeignKeyConstraint about lock level */
+ rel = heap_open(relationId, AccessExclusiveLock);
+
+ pg_constraint = heap_open(ConstraintRelationId, RowShareLock);
+ tupdesc = RelationGetDescr(pg_constraint);
+
+ /*
+ * The constraint key may differ, if the columns in the partition are
+ * different. This map is used to convert them.
+ */
+ attmap = convert_tuples_by_name_map(RelationGetDescr(rel),
+ RelationGetDescr(parentRel),
+ gettext_noop("could not convert row type"));
+
+ ScanKeyInit(&key,
+ Anum_pg_constraint_conrelid, BTEqualStrategyNumber,
+ F_OIDEQ, ObjectIdGetDatum(parentId));
+ scan = systable_beginscan(pg_constraint, ConstraintRelidIndexId, true,
+ NULL, 1, &key);
+
+ while ((tuple = systable_getnext(scan)) != NULL)
+ {
+ Form_pg_constraint constrForm = (Form_pg_constraint) GETSTRUCT(tuple);
+ AttrNumber conkey[INDEX_MAX_KEYS];
+ AttrNumber mapped_conkey[INDEX_MAX_KEYS];
+ AttrNumber confkey[INDEX_MAX_KEYS];
+ Oid conpfeqop[INDEX_MAX_KEYS];
+ Oid conppeqop[INDEX_MAX_KEYS];
+ Oid conffeqop[INDEX_MAX_KEYS];
+ Constraint *fkconstraint;
+ ClonedConstraint *newc;
+ Oid constrOid;
+ ObjectAddress parentAddr,
+ childAddr;
+ int nelem;
+ int i;
+ ArrayType *arr;
+ Datum datum;
+ bool isnull;
+
+ /* only foreign keys */
+ if (constrForm->contype != CONSTRAINT_FOREIGN)
+ continue;
+
+ ObjectAddressSet(parentAddr, ConstraintRelationId,
+ HeapTupleGetOid(tuple));
+
+ datum = fastgetattr(tuple, Anum_pg_constraint_conkey,
+ tupdesc, &isnull);
+ if (isnull)
+ elog(ERROR, "null conkey");
+ arr = DatumGetArrayTypeP(datum);
+ nelem = ARR_DIMS(arr)[0];
+ if (ARR_NDIM(arr) != 1 ||
+ nelem < 1 ||
+ nelem > INDEX_MAX_KEYS ||
+ ARR_HASNULL(arr) ||
+ ARR_ELEMTYPE(arr) != INT2OID)
+ elog(ERROR, "conkey is not a 1-D smallint array");
+ memcpy(conkey, ARR_DATA_PTR(arr), nelem * sizeof(AttrNumber));
+
+ for (i = 0; i < nelem; i++)
+ mapped_conkey[i] = attmap[conkey[i] - 1];
+
+ datum = fastgetattr(tuple, Anum_pg_constraint_confkey,
+ tupdesc, &isnull);
+ if (isnull)
+ elog(ERROR, "null confkey");
+ arr = DatumGetArrayTypeP(datum);
+ nelem = ARR_DIMS(arr)[0];
+ if (ARR_NDIM(arr) != 1 ||
+ nelem < 1 ||
+ nelem > INDEX_MAX_KEYS ||
+ ARR_HASNULL(arr) ||
+ ARR_ELEMTYPE(arr) != INT2OID)
+ elog(ERROR, "confkey is not a 1-D smallint array");
+ memcpy(confkey, ARR_DATA_PTR(arr), nelem * sizeof(AttrNumber));
+
+ datum = fastgetattr(tuple, Anum_pg_constraint_conpfeqop,
+ tupdesc, &isnull);
+ if (isnull)
+ elog(ERROR, "null conpfeqop");
+ arr = DatumGetArrayTypeP(datum);
+ nelem = ARR_DIMS(arr)[0];
+ if (ARR_NDIM(arr) != 1 ||
+ nelem < 1 ||
+ nelem > INDEX_MAX_KEYS ||
+ ARR_HASNULL(arr) ||
+ ARR_ELEMTYPE(arr) != OIDOID)
+ elog(ERROR, "conpfeqop is not a 1-D OID array");
+ memcpy(conpfeqop, ARR_DATA_PTR(arr), nelem * sizeof(Oid));
+
+ datum = fastgetattr(tuple, Anum_pg_constraint_conpfeqop,
+ tupdesc, &isnull);
+ if (isnull)
+ elog(ERROR, "null conpfeqop");
+ arr = DatumGetArrayTypeP(datum);
+ nelem = ARR_DIMS(arr)[0];
+ if (ARR_NDIM(arr) != 1 ||
+ nelem < 1 ||
+ nelem > INDEX_MAX_KEYS ||
+ ARR_HASNULL(arr) ||
+ ARR_ELEMTYPE(arr) != OIDOID)
+ elog(ERROR, "conpfeqop is not a 1-D OID array");
+ memcpy(conpfeqop, ARR_DATA_PTR(arr), nelem * sizeof(Oid));
+
+ datum = fastgetattr(tuple, Anum_pg_constraint_conppeqop,
+ tupdesc, &isnull);
+ if (isnull)
+ elog(ERROR, "null conppeqop");
+ arr = DatumGetArrayTypeP(datum);
+ nelem = ARR_DIMS(arr)[0];
+ if (ARR_NDIM(arr) != 1 ||
+ nelem < 1 ||
+ nelem > INDEX_MAX_KEYS ||
+ ARR_HASNULL(arr) ||
+ ARR_ELEMTYPE(arr) != OIDOID)
+ elog(ERROR, "conppeqop is not a 1-D OID array");
+ memcpy(conppeqop, ARR_DATA_PTR(arr), nelem * sizeof(Oid));
+
+ datum = fastgetattr(tuple, Anum_pg_constraint_conffeqop,
+ tupdesc, &isnull);
+ if (isnull)
+ elog(ERROR, "null conffeqop");
+ arr = DatumGetArrayTypeP(datum);
+ nelem = ARR_DIMS(arr)[0];
+ if (ARR_NDIM(arr) != 1 ||
+ nelem < 1 ||
+ nelem > INDEX_MAX_KEYS ||
+ ARR_HASNULL(arr) ||
+ ARR_ELEMTYPE(arr) != OIDOID)
+ elog(ERROR, "conffeqop is not a 1-D OID array");
+ memcpy(conffeqop, ARR_DATA_PTR(arr), nelem * sizeof(Oid));
+
+ constrOid =
+ CreateConstraintEntry(NameStr(constrForm->conname),
+ constrForm->connamespace,
+ CONSTRAINT_FOREIGN,
+ constrForm->condeferrable,
+ constrForm->condeferred,
+ constrForm->convalidated,
+ HeapTupleGetOid(tuple),
+ relationId,
+ mapped_conkey,
+ nelem,
+ InvalidOid, /* not a domain constraint */
+ constrForm->conindid, /* same index */
+ constrForm->confrelid, /* same foreign rel */
+ confkey,
+ conpfeqop,
+ conppeqop,
+ conffeqop,
+ nelem,
+ constrForm->confupdtype,
+ constrForm->confdeltype,
+ constrForm->confmatchtype,
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ false,
+ 1, false, true);
+
+ ObjectAddressSet(childAddr, ConstraintRelationId, constrOid);
+ recordDependencyOn(&childAddr, &parentAddr, DEPENDENCY_INTERNAL_AUTO);
+
+ fkconstraint = makeNode(Constraint);
+ /* for now this is all we need */
+ fkconstraint->fk_upd_action = constrForm->confupdtype;
+ fkconstraint->fk_del_action = constrForm->confdeltype;
+ fkconstraint->deferrable = constrForm->condeferrable;
+ fkconstraint->initdeferred = constrForm->condeferred;
+
+ createForeignKeyTriggers(rel, constrForm->confrelid, fkconstraint,
+ constrOid, constrForm->conindid, false);
+
+ if (cloned)
+ {
+ /*
+ * Feed back caller about the constraints we created, so that they can
+ * set up constraint verification.
+ */
+ newc = palloc(sizeof(ClonedConstraint));
+ newc->relid = relationId;
+ newc->refrelid = constrForm->confrelid;
+ newc->conindid = constrForm->conindid;
+ newc->conid = constrOid;
+ newc->constraint = fkconstraint;
+
+ *cloned = lappend(*cloned, newc);
+ }
+ }
+ systable_endscan(scan);
+
+ pfree(attmap);
+
+ if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
+ {
+ PartitionDesc partdesc = RelationGetPartitionDesc(rel);
+ int i;
+
+ for (i = 0; i < partdesc->nparts; i++)
+ CloneForeignKeyConstraints(RelationGetRelid(rel),
+ partdesc->oids[i],
+ cloned);
+ }
+
+ heap_close(rel, NoLock); /* keep lock till commit */
+ heap_close(parentRel, NoLock);
+ heap_close(pg_constraint, RowShareLock);
+}
/*
* Test whether given name is currently used as a constraint name
static void validateForeignKeyConstraint(char *conname,
Relation rel, Relation pkrel,
Oid pkindOid, Oid constraintOid);
-static void createForeignKeyTriggers(Relation rel, Oid refRelOid,
- Constraint *fkconstraint,
- Oid constraintOid, Oid indexOid);
static void ATController(AlterTableStmt *parsetree,
Relation rel, List *cmds, bool recurse, LOCKMODE lockmode);
static void ATPrepCmd(List **wqueue, Relation rel, AlterTableCmd *cmd,
Constraint *constr,
bool recurse, bool recursing, bool is_readd,
LOCKMODE lockmode);
-static ObjectAddress ATAddForeignKeyConstraint(AlteredTableInfo *tab, Relation rel,
- Constraint *fkconstraint, LOCKMODE lockmode);
+static ObjectAddress ATAddForeignKeyConstraint(List **wqueue, AlteredTableInfo *tab,
+ Relation rel, Constraint *fkconstraint, Oid parentConstr,
+ bool recurse, bool recursing,
+ LOCKMODE lockmode);
static void ATExecDropConstraint(Relation rel, const char *constrName,
DropBehavior behavior,
bool recurse, bool recursing,
* relkind: relkind to assign to the new relation
* ownerId: if not InvalidOid, use this as the new relation's owner.
* typaddress: if not null, it's set to the pg_type entry's address.
+ * queryString: for error reporting
*
* Note that permissions checks are done against current user regardless of
* ownerId. A nonzero ownerId is used when someone is creating a relation
}
/*
- * If we're creating a partition, create now all the indexes and triggers
- * defined in the parent.
+ * If we're creating a partition, create now all the indexes, triggers,
+ * FKs defined in the parent.
*
* We can't do it earlier, because DefineIndex wants to know the partition
* key which we just stored.
if (parent->trigdesc != NULL)
CloneRowTriggersToPartition(parent, rel);
+ /*
+ * And foreign keys too. Note that because we're freshly creating the
+ * table, there is no need to verify these new constraints.
+ */
+ CloneForeignKeyConstraints(parentId, relationId, NULL);
+
heap_close(parent, NoLock);
}
RelationGetNamespace(rel),
NIL);
- address = ATAddForeignKeyConstraint(tab, rel, newConstraint,
+ address = ATAddForeignKeyConstraint(wqueue, tab, rel,
+ newConstraint, InvalidOid,
+ recurse, false,
lockmode);
break;
* We do permissions checks here, however.
*/
static ObjectAddress
-ATAddForeignKeyConstraint(AlteredTableInfo *tab, Relation rel,
- Constraint *fkconstraint, LOCKMODE lockmode)
+ATAddForeignKeyConstraint(List **wqueue, AlteredTableInfo *tab, Relation rel,
+ Constraint *fkconstraint, Oid parentConstr,
+ bool recurse, bool recursing, LOCKMODE lockmode)
{
Relation pkrel;
int16 pkattnum[INDEX_MAX_KEYS];
errmsg("cannot reference partitioned table \"%s\"",
RelationGetRelationName(pkrel))));
+ if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
+ {
+ if (!recurse)
+ ereport(ERROR,
+ (errcode(ERRCODE_WRONG_OBJECT_TYPE),
+ errmsg("foreign key referencing partitioned table \"%s\" must not be ONLY",
+ RelationGetRelationName(pkrel))));
+ if (fkconstraint->skip_validation && !fkconstraint->initially_valid)
+ ereport(ERROR,
+ (errcode(ERRCODE_WRONG_OBJECT_TYPE),
+ errmsg("cannot add NOT VALID foreign key to relation \"%s\"",
+ RelationGetRelationName(pkrel)),
+ errdetail("This feature is not yet supported on partitioned tables.")));
+ }
+
if (pkrel->rd_rel->relkind != RELKIND_RELATION)
ereport(ERROR,
(errcode(ERRCODE_WRONG_OBJECT_TYPE),
fkconstraint->deferrable,
fkconstraint->initdeferred,
fkconstraint->initially_valid,
- InvalidOid, /* no parent constraint */
+ parentConstr,
RelationGetRelid(rel),
fkattnum,
numfks,
ObjectAddressSet(address, ConstraintRelationId, constrOid);
/*
- * Create the triggers that will enforce the constraint.
+ * Create the triggers that will enforce the constraint. We only want
+ * the action triggers to appear for the parent partitioned relation,
+ * even though the constraints also exist below.
*/
createForeignKeyTriggers(rel, RelationGetRelid(pkrel), fkconstraint,
- constrOid, indexOid);
+ constrOid, indexOid, !recursing);
/*
* Tell Phase 3 to check that the constraint is satisfied by existing
tab->constraints = lappend(tab->constraints, newcon);
}
+ /*
+ * When called on a partitioned table, recurse to create the constraint on
+ * the partitions also.
+ */
+ if (recurse && rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
+ {
+ PartitionDesc partdesc;
+
+ partdesc = RelationGetPartitionDesc(rel);
+
+ for (i = 0; i < partdesc->nparts; i++)
+ {
+ Oid partitionId = partdesc->oids[i];
+ Relation partition = heap_open(partitionId, lockmode);
+ AlteredTableInfo *childtab;
+ ObjectAddress childAddr;
+
+ CheckTableNotInUse(partition, "ALTER TABLE");
+
+ /* Find or create work queue entry for this table */
+ childtab = ATGetQueueEntry(wqueue, partition);
+
+ childAddr =
+ ATAddForeignKeyConstraint(wqueue, childtab, partition,
+ fkconstraint, constrOid,
+ recurse, true, lockmode);
+
+ /* Record this constraint as dependent on the parent one */
+ recordDependencyOn(&childAddr, &address, DEPENDENCY_INTERNAL_AUTO);
+
+ heap_close(partition, NoLock);
+ }
+ }
+
/*
* Close pk table, but keep lock until we've committed.
*/
heap_close(refrel, NoLock);
/*
- * Foreign keys do not inherit, so we purposely ignore the
- * recursion bit here
+ * We disallow creating invalid foreign keys to or from
+ * partitioned tables, so ignoring the recursion bit is okay.
*/
}
else if (con->contype == CONSTRAINT_CHECK)
}
/*
- * Create the triggers that implement an FK constraint.
- *
- * NB: if you change any trigger properties here, see also
- * ATExecAlterConstraint.
+ * createForeignKeyActionTriggers
+ * Create the referenced-side "action" triggers that implement a foreign
+ * key.
*/
static void
-createForeignKeyTriggers(Relation rel, Oid refRelOid, Constraint *fkconstraint,
- Oid constraintOid, Oid indexOid)
+createForeignKeyActionTriggers(Relation rel, Oid refRelOid, Constraint *fkconstraint,
+ Oid constraintOid, Oid indexOid)
{
- Oid myRelOid;
CreateTrigStmt *fk_trigger;
- myRelOid = RelationGetRelid(rel);
-
- /* Make changes-so-far visible */
- CommandCounterIncrement();
-
/*
* Build and execute a CREATE CONSTRAINT TRIGGER statement for the ON
* DELETE action on the referenced table.
}
fk_trigger->args = NIL;
- (void) CreateTrigger(fk_trigger, NULL, refRelOid, myRelOid, constraintOid,
+ (void) CreateTrigger(fk_trigger, NULL, refRelOid, RelationGetRelid(rel),
+ constraintOid,
indexOid, InvalidOid, InvalidOid, NULL, true, false);
/* Make changes-so-far visible */
}
fk_trigger->args = NIL;
- (void) CreateTrigger(fk_trigger, NULL, refRelOid, myRelOid, constraintOid,
+ (void) CreateTrigger(fk_trigger, NULL, refRelOid, RelationGetRelid(rel),
+ constraintOid,
indexOid, InvalidOid, InvalidOid, NULL, true, false);
+}
- /* Make changes-so-far visible */
- CommandCounterIncrement();
-
- /*
- * Build and execute CREATE CONSTRAINT TRIGGER statements for the CHECK
- * action for both INSERTs and UPDATEs on the referencing table.
- */
+/*
+ * createForeignKeyCheckTriggers
+ * Create the referencing-side "check" triggers that implement a foreign
+ * key.
+ */
+static void
+createForeignKeyCheckTriggers(Oid myRelOid, Oid refRelOid,
+ Constraint *fkconstraint, Oid constraintOid,
+ Oid indexOid)
+{
CreateFKCheckTrigger(myRelOid, refRelOid, fkconstraint, constraintOid,
indexOid, true);
CreateFKCheckTrigger(myRelOid, refRelOid, fkconstraint, constraintOid,
indexOid, false);
}
+/*
+ * Create the triggers that implement an FK constraint.
+ *
+ * NB: if you change any trigger properties here, see also
+ * ATExecAlterConstraint.
+ */
+void
+createForeignKeyTriggers(Relation rel, Oid refRelOid, Constraint *fkconstraint,
+ Oid constraintOid, Oid indexOid, bool create_action)
+{
+ /*
+ * For the referenced side, create action triggers, if requested. (If the
+ * referencing side is partitioned, there is still only one trigger, which
+ * runs on the referenced side and points to the top of the referencing
+ * hierarchy.)
+ */
+ if (create_action)
+ createForeignKeyActionTriggers(rel, refRelOid, fkconstraint, constraintOid,
+ indexOid);
+
+ /*
+ * For the referencing side, create the check triggers. We only need these
+ * on the partitions.
+ */
+ if (rel->rd_rel->relkind != RELKIND_PARTITIONED_TABLE)
+ createForeignKeyCheckTriggers(RelationGetRelid(rel), refRelOid,
+ fkconstraint, constraintOid, indexOid);
+
+ CommandCounterIncrement();
+}
+
/*
* ALTER TABLE DROP CONSTRAINT
*
bool found_whole_row;
Oid defaultPartOid;
List *partBoundConstraint;
+ List *cloned;
+ ListCell *l;
/*
* We must lock the default partition, because attaching a new partition
/* and triggers */
CloneRowTriggersToPartition(rel, attachrel);
+ /*
+ * Clone foreign key constraints, and setup for Phase 3 to verify them.
+ */
+ cloned = NIL;
+ CloneForeignKeyConstraints(RelationGetRelid(rel),
+ RelationGetRelid(attachrel), &cloned);
+ foreach(l, cloned)
+ {
+ ClonedConstraint *cloned = lfirst(l);
+ NewConstraint *newcon;
+ Relation clonedrel;
+ AlteredTableInfo *parttab;
+
+ clonedrel = relation_open(cloned->relid, NoLock);
+ parttab = ATGetQueueEntry(wqueue, clonedrel);
+
+ newcon = (NewConstraint *) palloc0(sizeof(NewConstraint));
+ newcon->name = cloned->constraint->conname;
+ newcon->contype = CONSTR_FOREIGN;
+ newcon->refrelid = cloned->refrelid;
+ newcon->refindid = cloned->conindid;
+ newcon->conid = cloned->conid;
+ newcon->qual = (Node *) cloned->constraint;
+
+ parttab->constraints = lappend(parttab->constraints, newcon);
+
+ relation_close(clonedrel, NoLock);
+ }
+
/*
* Generate partition constraint from the partition bound specification.
* If the parent itself is a partition, make sure to include its
errmsg("foreign key constraints are not supported on foreign tables"),
parser_errposition(cxt->pstate,
constraint->location)));
- if (cxt->ispartitioned)
- ereport(ERROR,
- (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
- errmsg("foreign key constraints are not supported on partitioned tables"),
- parser_errposition(cxt->pstate,
- constraint->location)));
/*
* Fill in the current attribute's name and throw it into the
errmsg("foreign key constraints are not supported on foreign tables"),
parser_errposition(cxt->pstate,
constraint->location)));
- if (cxt->ispartitioned)
- ereport(ERROR,
- (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
- errmsg("foreign key constraints are not supported on partitioned tables"),
- parser_errposition(cxt->pstate,
- constraint->location)));
cxt->fkconstraints = lappend(cxt->fkconstraints, constraint);
break;
char paramname[16];
const char *querysep;
Oid queryoids[RI_MAX_NUMKEYS];
+ const char *fk_only;
int i;
/* ----------
* The query string built is
- * SELECT 1 FROM ONLY <fktable> x WHERE $1 = fkatt1 [AND ...]
+ * SELECT 1 FROM [ONLY] <fktable> x WHERE $1 = fkatt1 [AND ...]
* FOR KEY SHARE OF x
* The type id's for the $ parameters are those of the
* corresponding PK attributes.
* ----------
*/
initStringInfo(&querybuf);
+ fk_only = fk_rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE ?
+ "" : "ONLY ";
quoteRelationName(fkrelname, fk_rel);
- appendStringInfo(&querybuf, "SELECT 1 FROM ONLY %s x",
- fkrelname);
+ appendStringInfo(&querybuf, "SELECT 1 FROM %s%s x",
+ fk_only, fkrelname);
querysep = "WHERE";
for (i = 0; i < riinfo->nkeys; i++)
{
char paramname[16];
const char *querysep;
Oid queryoids[RI_MAX_NUMKEYS];
+ const char *fk_only;
/* ----------
* The query string built is
- * DELETE FROM ONLY <fktable> WHERE $1 = fkatt1 [AND ...]
+ * DELETE FROM [ONLY] <fktable> WHERE $1 = fkatt1 [AND ...]
* The type id's for the $ parameters are those of the
* corresponding PK attributes.
* ----------
*/
initStringInfo(&querybuf);
+ fk_only = fk_rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE ?
+ "" : "ONLY ";
quoteRelationName(fkrelname, fk_rel);
- appendStringInfo(&querybuf, "DELETE FROM ONLY %s", fkrelname);
+ appendStringInfo(&querybuf, "DELETE FROM %s%s",
+ fk_only, fkrelname);
querysep = "WHERE";
for (i = 0; i < riinfo->nkeys; i++)
{
const char *querysep;
const char *qualsep;
Oid queryoids[RI_MAX_NUMKEYS * 2];
+ const char *fk_only;
/* ----------
* The query string built is
- * UPDATE ONLY <fktable> SET fkatt1 = $1 [, ...]
+ * UPDATE [ONLY] <fktable> SET fkatt1 = $1 [, ...]
* WHERE $n = fkatt1 [AND ...]
* The type id's for the $ parameters are those of the
* corresponding PK attributes. Note that we are assuming
*/
initStringInfo(&querybuf);
initStringInfo(&qualbuf);
+ fk_only = fk_rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE ?
+ "" : "ONLY ";
quoteRelationName(fkrelname, fk_rel);
- appendStringInfo(&querybuf, "UPDATE ONLY %s SET", fkrelname);
+ appendStringInfo(&querybuf, "UPDATE %s%s SET",
+ fk_only, fkrelname);
querysep = "";
qualsep = "WHERE";
for (i = 0, j = riinfo->nkeys; i < riinfo->nkeys; i++, j++)
char paramname[16];
const char *querysep;
const char *qualsep;
+ const char *fk_only;
Oid queryoids[RI_MAX_NUMKEYS];
/* ----------
* The query string built is
- * UPDATE ONLY <fktable> SET fkatt1 = NULL [, ...]
+ * UPDATE [ONLY] <fktable> SET fkatt1 = NULL [, ...]
* WHERE $1 = fkatt1 [AND ...]
* The type id's for the $ parameters are those of the
* corresponding PK attributes.
*/
initStringInfo(&querybuf);
initStringInfo(&qualbuf);
+ fk_only = fk_rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE ?
+ "" : "ONLY ";
quoteRelationName(fkrelname, fk_rel);
- appendStringInfo(&querybuf, "UPDATE ONLY %s SET", fkrelname);
+ appendStringInfo(&querybuf, "UPDATE %s%s SET",
+ fk_only, fkrelname);
querysep = "";
qualsep = "WHERE";
for (i = 0; i < riinfo->nkeys; i++)
const char *querysep;
const char *qualsep;
Oid queryoids[RI_MAX_NUMKEYS];
+ const char *fk_only;
int i;
/* ----------
* The query string built is
- * UPDATE ONLY <fktable> SET fkatt1 = DEFAULT [, ...]
+ * UPDATE [ONLY] <fktable> SET fkatt1 = DEFAULT [, ...]
* WHERE $1 = fkatt1 [AND ...]
* The type id's for the $ parameters are those of the
* corresponding PK attributes.
initStringInfo(&querybuf);
initStringInfo(&qualbuf);
quoteRelationName(fkrelname, fk_rel);
- appendStringInfo(&querybuf, "UPDATE ONLY %s SET", fkrelname);
+ fk_only = fk_rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE ?
+ "" : "ONLY ";
+ appendStringInfo(&querybuf, "UPDATE %s%s SET",
+ fk_only, fkrelname);
querysep = "";
qualsep = "WHERE";
for (i = 0; i < riinfo->nkeys; i++)
RangeTblEntry *pkrte;
RangeTblEntry *fkrte;
const char *sep;
+ const char *fk_only;
int i;
int save_nestlevel;
char workmembuf[32];
/*----------
* The query string built is:
- * SELECT fk.keycols FROM ONLY relname fk
- * LEFT OUTER JOIN ONLY pkrelname pk
+ * SELECT fk.keycols FROM [ONLY] relname fk
+ * LEFT OUTER JOIN pkrelname pk
* ON (pk.pkkeycol1=fk.keycol1 [AND ...])
* WHERE pk.pkkeycol1 IS NULL AND
* For MATCH SIMPLE:
quoteRelationName(pkrelname, pk_rel);
quoteRelationName(fkrelname, fk_rel);
+ fk_only = fk_rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE ?
+ "" : "ONLY ";
appendStringInfo(&querybuf,
- " FROM ONLY %s fk LEFT OUTER JOIN ONLY %s pk ON",
- fkrelname, pkrelname);
+ " FROM %s%s fk LEFT OUTER JOIN %s pk ON",
+ fk_only, fkrelname, pkrelname);
strcpy(pkattname, "pk.");
strcpy(fkattname, "fk.");
elog(ERROR, "wrong pg_constraint entry for trigger \"%s\" on table \"%s\"",
trigger->tgname, RelationGetRelationName(trig_rel));
}
- else
- {
- if (riinfo->fk_relid != RelationGetRelid(trig_rel) ||
- riinfo->pk_relid != trigger->tgconstrrelid)
- elog(ERROR, "wrong pg_constraint entry for trigger \"%s\" on table \"%s\"",
- trigger->tgname, RelationGetRelationName(trig_rel));
- }
return riinfo;
}
tbinfo->dobj.name);
resetPQExpBuffer(query);
- appendPQExpBuffer(query,
- "SELECT tableoid, oid, conname, confrelid, "
- "pg_catalog.pg_get_constraintdef(oid) AS condef "
- "FROM pg_catalog.pg_constraint "
- "WHERE conrelid = '%u'::pg_catalog.oid "
- "AND contype = 'f'",
- tbinfo->dobj.catId.oid);
+ if (fout->remoteVersion >= 110000)
+ appendPQExpBuffer(query,
+ "SELECT tableoid, oid, conname, confrelid, "
+ "pg_catalog.pg_get_constraintdef(oid) AS condef "
+ "FROM pg_catalog.pg_constraint "
+ "WHERE conrelid = '%u'::pg_catalog.oid "
+ "AND conparentid = 0 "
+ "AND contype = 'f'",
+ tbinfo->dobj.catId.oid);
+ else
+ appendPQExpBuffer(query,
+ "SELECT tableoid, oid, conname, confrelid, "
+ "pg_catalog.pg_get_constraintdef(oid) AS condef "
+ "FROM pg_catalog.pg_constraint "
+ "WHERE conrelid = '%u'::pg_catalog.oid "
+ "AND contype = 'f'",
+ tbinfo->dobj.catId.oid);
res = ExecuteSqlQuery(fout, query->data, PGRES_TUPLES_OK);
ntups = PQntuples(res);
}
else if (coninfo->contype == 'f')
{
+ char *only;
+
+ /*
+ * Foreign keys on partitioned tables are always declared as inheriting
+ * to partitions; for all other cases, emit them as applying ONLY
+ * directly to the named table, because that's how they work for
+ * regular inherited tables.
+ */
+ only = tbinfo->relkind == RELKIND_PARTITIONED_TABLE ? "" : "ONLY ";
+
/*
* XXX Potentially wrap in a 'SET CONSTRAINTS OFF' block so that the
* current table data is not processed
*/
- appendPQExpBuffer(q, "ALTER TABLE ONLY %s\n",
- fmtQualifiedDumpable(tbinfo));
+ appendPQExpBuffer(q, "ALTER TABLE %s%s\n",
+ only, fmtQualifiedDumpable(tbinfo));
appendPQExpBuffer(q, " ADD CONSTRAINT %s %s;\n",
fmtId(coninfo->dobj.name),
coninfo->condef);
- appendPQExpBuffer(delq, "ALTER TABLE ONLY %s ",
- fmtQualifiedDumpable(tbinfo));
+ appendPQExpBuffer(delq, "ALTER TABLE %s%s ",
+ only, fmtQualifiedDumpable(tbinfo));
appendPQExpBuffer(delq, "DROP CONSTRAINT %s;\n",
fmtId(coninfo->dobj.name));
CONSTRAINT_ASSERTION /* for future expansion */
} ConstraintCategory;
+/*
+ * Used when cloning a foreign key constraint to a partition, so that the
+ * caller can optionally set up a verification pass for it.
+ */
+typedef struct ClonedConstraint
+{
+ Oid relid;
+ Oid refrelid;
+ Oid conindid;
+ Oid conid;
+ Constraint *constraint;
+} ClonedConstraint;
+
extern Oid CreateConstraintEntry(const char *constraintName,
Oid constraintNamespace,
char constraintType,
bool conNoInherit,
bool is_internal);
+extern void CloneForeignKeyConstraints(Oid parentId, Oid relationId,
+ List **cloned);
+
extern void RemoveConstraintById(Oid conId);
extern void RenameConstraintById(Oid conId, const char *newname);
extern void check_of_type(HeapTuple typetuple);
+extern void createForeignKeyTriggers(Relation rel, Oid refRelOid,
+ Constraint *fkconstraint, Oid constraintOid,
+ Oid indexOid, bool create_action);
+
extern void register_on_commit_action(Oid relid, OnCommitAction action);
extern void remove_on_commit_action(Oid relid);
a int,
b int
) PARTITION BY RANGE (a, (a+b+1));
-ALTER TABLE partitioned ADD FOREIGN KEY (a) REFERENCES blah;
-ERROR: foreign key constraints are not supported on partitioned tables
-LINE 1: ALTER TABLE partitioned ADD FOREIGN KEY (a) REFERENCES blah;
- ^
ALTER TABLE partitioned ADD EXCLUDE USING gist (a WITH &&);
ERROR: exclusion constraints are not supported on partitioned tables
LINE 1: ALTER TABLE partitioned ADD EXCLUDE USING gist (a WITH &&);
) PARTITION BY LIST (a1, a2); -- fail
ERROR: cannot use "list" partition strategy with more than one column
-- unsupported constraint type for partitioned tables
-CREATE TABLE pkrel (
- a int PRIMARY KEY
-);
-CREATE TABLE partitioned (
- a int REFERENCES pkrel(a)
-) PARTITION BY RANGE (a);
-ERROR: foreign key constraints are not supported on partitioned tables
-LINE 2: a int REFERENCES pkrel(a)
- ^
-DROP TABLE pkrel;
CREATE TABLE partitioned (
a int,
EXCLUDE USING gist (a WITH &&)
ERROR: cannot ALTER TABLE "pktable2" because it has pending trigger events
commit;
drop table pktable2, fktable2;
+--
+-- Foreign keys and partitioned tables
+--
+-- partitioned table in the referenced side are not allowed
+CREATE TABLE fk_partitioned_pk (a int, b int, primary key (a, b))
+ PARTITION BY RANGE (a, b);
+-- verify with create table first ...
+CREATE TABLE fk_notpartitioned_fk (a int, b int,
+ FOREIGN KEY (a, b) REFERENCES fk_partitioned_pk);
+ERROR: cannot reference partitioned table "fk_partitioned_pk"
+-- and then with alter table.
+CREATE TABLE fk_notpartitioned_fk_2 (a int, b int);
+ALTER TABLE fk_notpartitioned_fk_2 ADD FOREIGN KEY (a, b)
+ REFERENCES fk_partitioned_pk;
+ERROR: cannot reference partitioned table "fk_partitioned_pk"
+DROP TABLE fk_partitioned_pk, fk_notpartitioned_fk_2;
+-- Creation of a partitioned hierarchy with irregular definitions
+CREATE TABLE fk_notpartitioned_pk (fdrop1 int, a int, fdrop2 int, b int,
+ PRIMARY KEY (a, b));
+ALTER TABLE fk_notpartitioned_pk DROP COLUMN fdrop1, DROP COLUMN fdrop2;
+CREATE TABLE fk_partitioned_fk (b int, fdrop1 int, a int) PARTITION BY RANGE (a, b);
+ALTER TABLE fk_partitioned_fk DROP COLUMN fdrop1;
+CREATE TABLE fk_partitioned_fk_1 (fdrop1 int, fdrop2 int, a int, fdrop3 int, b int);
+ALTER TABLE fk_partitioned_fk_1 DROP COLUMN fdrop1, DROP COLUMN fdrop2, DROP COLUMN fdrop3;
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_1 FOR VALUES FROM (0,0) TO (1000,1000);
+ALTER TABLE fk_partitioned_fk ADD FOREIGN KEY (a, b) REFERENCES fk_notpartitioned_pk;
+CREATE TABLE fk_partitioned_fk_2 (b int, fdrop1 int, fdrop2 int, a int);
+ALTER TABLE fk_partitioned_fk_2 DROP COLUMN fdrop1, DROP COLUMN fdrop2;
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_2 FOR VALUES FROM (1000,1000) TO (2000,2000);
+CREATE TABLE fk_partitioned_fk_3 (fdrop1 int, fdrop2 int, fdrop3 int, fdrop4 int, b int, a int)
+ PARTITION BY HASH (a);
+ALTER TABLE fk_partitioned_fk_3 DROP COLUMN fdrop1, DROP COLUMN fdrop2,
+ DROP COLUMN fdrop3, DROP COLUMN fdrop4;
+CREATE TABLE fk_partitioned_fk_3_0 PARTITION OF fk_partitioned_fk_3 FOR VALUES WITH (MODULUS 5, REMAINDER 0);
+CREATE TABLE fk_partitioned_fk_3_1 PARTITION OF fk_partitioned_fk_3 FOR VALUES WITH (MODULUS 5, REMAINDER 1);
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_3
+ FOR VALUES FROM (2000,2000) TO (3000,3000);
+-- these inserts, targetting both the partition directly as well as the
+-- partitioned table, should all fail
+INSERT INTO fk_partitioned_fk (a,b) VALUES (500, 501);
+ERROR: insert or update on table "fk_partitioned_fk_1" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(500, 501) is not present in table "fk_notpartitioned_pk".
+INSERT INTO fk_partitioned_fk_1 (a,b) VALUES (500, 501);
+ERROR: insert or update on table "fk_partitioned_fk_1" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(500, 501) is not present in table "fk_notpartitioned_pk".
+INSERT INTO fk_partitioned_fk (a,b) VALUES (1500, 1501);
+ERROR: insert or update on table "fk_partitioned_fk_2" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(1500, 1501) is not present in table "fk_notpartitioned_pk".
+INSERT INTO fk_partitioned_fk_2 (a,b) VALUES (1500, 1501);
+ERROR: insert or update on table "fk_partitioned_fk_2" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(1500, 1501) is not present in table "fk_notpartitioned_pk".
+INSERT INTO fk_partitioned_fk (a,b) VALUES (2500, 2502);
+ERROR: insert or update on table "fk_partitioned_fk_3_1" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(2500, 2502) is not present in table "fk_notpartitioned_pk".
+INSERT INTO fk_partitioned_fk_3 (a,b) VALUES (2500, 2502);
+ERROR: insert or update on table "fk_partitioned_fk_3_1" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(2500, 2502) is not present in table "fk_notpartitioned_pk".
+INSERT INTO fk_partitioned_fk (a,b) VALUES (2501, 2503);
+ERROR: insert or update on table "fk_partitioned_fk_3_0" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(2501, 2503) is not present in table "fk_notpartitioned_pk".
+INSERT INTO fk_partitioned_fk_3 (a,b) VALUES (2501, 2503);
+ERROR: insert or update on table "fk_partitioned_fk_3_0" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(2501, 2503) is not present in table "fk_notpartitioned_pk".
+-- but if we insert the values that make them valid, then they work
+INSERT INTO fk_notpartitioned_pk VALUES (500, 501), (1500, 1501),
+ (2500, 2502), (2501, 2503);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (500, 501);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (1500, 1501);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (2500, 2502);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (2501, 2503);
+-- this update fails because there is no referenced row
+UPDATE fk_partitioned_fk SET a = a + 1 WHERE a = 2501;
+ERROR: insert or update on table "fk_partitioned_fk_3_1" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(2502, 2503) is not present in table "fk_notpartitioned_pk".
+-- but we can fix it thusly:
+INSERT INTO fk_notpartitioned_pk (a,b) VALUES (2502, 2503);
+UPDATE fk_partitioned_fk SET a = a + 1 WHERE a = 2501;
+-- these updates would leave lingering rows in the referencing table; disallow
+UPDATE fk_notpartitioned_pk SET b = 502 WHERE a = 500;
+ERROR: update or delete on table "fk_notpartitioned_pk" violates foreign key constraint "fk_partitioned_fk_a_fkey" on table "fk_partitioned_fk"
+DETAIL: Key (a, b)=(500, 501) is still referenced from table "fk_partitioned_fk".
+UPDATE fk_notpartitioned_pk SET b = 1502 WHERE a = 1500;
+ERROR: update or delete on table "fk_notpartitioned_pk" violates foreign key constraint "fk_partitioned_fk_a_fkey" on table "fk_partitioned_fk"
+DETAIL: Key (a, b)=(1500, 1501) is still referenced from table "fk_partitioned_fk".
+UPDATE fk_notpartitioned_pk SET b = 2504 WHERE a = 2500;
+ERROR: update or delete on table "fk_notpartitioned_pk" violates foreign key constraint "fk_partitioned_fk_a_fkey" on table "fk_partitioned_fk"
+DETAIL: Key (a, b)=(2500, 2502) is still referenced from table "fk_partitioned_fk".
+ALTER TABLE fk_partitioned_fk DROP CONSTRAINT fk_partitioned_fk_a_fkey;
+-- done.
+DROP TABLE fk_notpartitioned_pk, fk_partitioned_fk;
+-- Test some other exotic foreign key features: MATCH SIMPLE, ON UPDATE/DELETE
+-- actions
+CREATE TABLE fk_notpartitioned_pk (a int, b int, primary key (a, b));
+CREATE TABLE fk_partitioned_fk (a int default 2501, b int default 142857) PARTITION BY LIST (a);
+CREATE TABLE fk_partitioned_fk_1 PARTITION OF fk_partitioned_fk FOR VALUES IN (NULL,500,501,502);
+ALTER TABLE fk_partitioned_fk ADD FOREIGN KEY (a, b)
+ REFERENCES fk_notpartitioned_pk MATCH SIMPLE
+ ON DELETE SET NULL ON UPDATE SET NULL;
+CREATE TABLE fk_partitioned_fk_2 PARTITION OF fk_partitioned_fk FOR VALUES IN (1500,1502);
+CREATE TABLE fk_partitioned_fk_3 (a int, b int);
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_3 FOR VALUES IN (2500,2501,2502,2503);
+-- this insert fails
+INSERT INTO fk_partitioned_fk (a, b) VALUES (2502, 2503);
+ERROR: insert or update on table "fk_partitioned_fk_3" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(2502, 2503) is not present in table "fk_notpartitioned_pk".
+INSERT INTO fk_partitioned_fk_3 (a, b) VALUES (2502, 2503);
+ERROR: insert or update on table "fk_partitioned_fk_3" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(2502, 2503) is not present in table "fk_notpartitioned_pk".
+-- but since the FK is MATCH SIMPLE, this one doesn't
+INSERT INTO fk_partitioned_fk_3 (a, b) VALUES (2502, NULL);
+-- now create the referenced row ...
+INSERT INTO fk_notpartitioned_pk VALUES (2502, 2503);
+--- and now the same insert work
+INSERT INTO fk_partitioned_fk_3 (a, b) VALUES (2502, 2503);
+-- this always works
+INSERT INTO fk_partitioned_fk (a,b) VALUES (NULL, NULL);
+-- ON UPDATE SET NULL
+SELECT tableoid::regclass, a, b FROM fk_partitioned_fk WHERE b IS NULL ORDER BY a;
+ tableoid | a | b
+---------------------+------+---
+ fk_partitioned_fk_3 | 2502 |
+ fk_partitioned_fk_1 | |
+(2 rows)
+
+UPDATE fk_notpartitioned_pk SET a = a + 1 WHERE a = 2502;
+SELECT tableoid::regclass, a, b FROM fk_partitioned_fk WHERE b IS NULL ORDER BY a;
+ tableoid | a | b
+---------------------+------+---
+ fk_partitioned_fk_3 | 2502 |
+ fk_partitioned_fk_1 | |
+ fk_partitioned_fk_1 | |
+(3 rows)
+
+-- ON DELETE SET NULL
+INSERT INTO fk_partitioned_fk VALUES (2503, 2503);
+SELECT count(*) FROM fk_partitioned_fk WHERE a IS NULL;
+ count
+-------
+ 2
+(1 row)
+
+DELETE FROM fk_notpartitioned_pk;
+SELECT count(*) FROM fk_partitioned_fk WHERE a IS NULL;
+ count
+-------
+ 3
+(1 row)
+
+-- ON UPDATE/DELETE SET DEFAULT
+ALTER TABLE fk_partitioned_fk DROP CONSTRAINT fk_partitioned_fk_a_fkey;
+ALTER TABLE fk_partitioned_fk ADD FOREIGN KEY (a, b)
+ REFERENCES fk_notpartitioned_pk
+ ON DELETE SET DEFAULT ON UPDATE SET DEFAULT;
+INSERT INTO fk_notpartitioned_pk VALUES (2502, 2503);
+INSERT INTO fk_partitioned_fk_3 (a, b) VALUES (2502, 2503);
+-- this fails, because the defaults for the referencing table are not present
+-- in the referenced table:
+UPDATE fk_notpartitioned_pk SET a = 1500 WHERE a = 2502;
+ERROR: insert or update on table "fk_partitioned_fk_3" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(2501, 142857) is not present in table "fk_notpartitioned_pk".
+-- but inserting the row we can make it work:
+INSERT INTO fk_notpartitioned_pk VALUES (2501, 142857);
+UPDATE fk_notpartitioned_pk SET a = 1500 WHERE a = 2502;
+SELECT * FROM fk_partitioned_fk WHERE b = 142857;
+ a | b
+------+--------
+ 2501 | 142857
+(1 row)
+
+-- ON UPDATE/DELETE CASCADE
+ALTER TABLE fk_partitioned_fk DROP CONSTRAINT fk_partitioned_fk_a_fkey;
+ALTER TABLE fk_partitioned_fk ADD FOREIGN KEY (a, b)
+ REFERENCES fk_notpartitioned_pk
+ ON DELETE CASCADE ON UPDATE CASCADE;
+UPDATE fk_notpartitioned_pk SET a = 2502 WHERE a = 2501;
+SELECT * FROM fk_partitioned_fk WHERE b = 142857;
+ a | b
+------+--------
+ 2502 | 142857
+(1 row)
+
+-- Now you see it ...
+SELECT * FROM fk_partitioned_fk WHERE b = 142857;
+ a | b
+------+--------
+ 2502 | 142857
+(1 row)
+
+DELETE FROM fk_notpartitioned_pk WHERE b = 142857;
+-- now you don't.
+SELECT * FROM fk_partitioned_fk WHERE a = 142857;
+ a | b
+---+---
+(0 rows)
+
+-- verify that DROP works
+DROP TABLE fk_partitioned_fk_2;
+-- verify that attaching a table checks that the existing data satisfies the
+-- constraint
+CREATE TABLE fk_partitioned_fk_2 (a int, b int) PARTITION BY RANGE (b);
+CREATE TABLE fk_partitioned_fk_2_1 PARTITION OF fk_partitioned_fk_2 FOR VALUES FROM (0) TO (1000);
+CREATE TABLE fk_partitioned_fk_2_2 PARTITION OF fk_partitioned_fk_2 FOR VALUES FROM (1000) TO (2000);
+INSERT INTO fk_partitioned_fk_2 VALUES (1600, 601), (1600, 1601);
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_2
+ FOR VALUES IN (1600);
+ERROR: insert or update on table "fk_partitioned_fk_2" violates foreign key constraint "fk_partitioned_fk_a_fkey"
+DETAIL: Key (a, b)=(1600, 601) is not present in table "fk_notpartitioned_pk".
+INSERT INTO fk_notpartitioned_pk VALUES (1600, 601), (1600, 1601);
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_2
+ FOR VALUES IN (1600);
+-- leave these tables around intentionally
DROP TABLE test_foreign_constraints_inh;
DROP TABLE test_foreign_constraints;
DROP TABLE test_primary_constraints;
+-- Test foreign key behavior
+create table inh_fk_1 (a int primary key);
+insert into inh_fk_1 values (1), (2), (3);
+create table inh_fk_2 (x int primary key, y int references inh_fk_1 on delete cascade);
+insert into inh_fk_2 values (11, 1), (22, 2), (33, 3);
+create table inh_fk_2_child () inherits (inh_fk_2);
+insert into inh_fk_2_child values (111, 1), (222, 2);
+delete from inh_fk_1 where a = 1;
+select * from inh_fk_1 order by 1;
+ a
+---
+ 2
+ 3
+(2 rows)
+
+select * from inh_fk_2 order by 1, 2;
+ x | y
+-----+---
+ 22 | 2
+ 33 | 3
+ 111 | 1
+ 222 | 2
+(4 rows)
+
+drop table inh_fk_1, inh_fk_2, inh_fk_2_child;
-- Test that parent and child CHECK constraints can be created in either order
create table p1(f1 int);
create table p1_c1() inherits(p1);
a int,
b int
) PARTITION BY RANGE (a, (a+b+1));
-ALTER TABLE partitioned ADD FOREIGN KEY (a) REFERENCES blah;
ALTER TABLE partitioned ADD EXCLUDE USING gist (a WITH &&);
-- cannot drop column that is part of the partition key
) PARTITION BY LIST (a1, a2); -- fail
-- unsupported constraint type for partitioned tables
-CREATE TABLE pkrel (
- a int PRIMARY KEY
-);
-CREATE TABLE partitioned (
- a int REFERENCES pkrel(a)
-) PARTITION BY RANGE (a);
-DROP TABLE pkrel;
-
CREATE TABLE partitioned (
a int,
EXCLUDE USING gist (a WITH &&)
commit;
drop table pktable2, fktable2;
+
+
+--
+-- Foreign keys and partitioned tables
+--
+
+-- partitioned table in the referenced side are not allowed
+CREATE TABLE fk_partitioned_pk (a int, b int, primary key (a, b))
+ PARTITION BY RANGE (a, b);
+-- verify with create table first ...
+CREATE TABLE fk_notpartitioned_fk (a int, b int,
+ FOREIGN KEY (a, b) REFERENCES fk_partitioned_pk);
+-- and then with alter table.
+CREATE TABLE fk_notpartitioned_fk_2 (a int, b int);
+ALTER TABLE fk_notpartitioned_fk_2 ADD FOREIGN KEY (a, b)
+ REFERENCES fk_partitioned_pk;
+DROP TABLE fk_partitioned_pk, fk_notpartitioned_fk_2;
+
+-- Creation of a partitioned hierarchy with irregular definitions
+CREATE TABLE fk_notpartitioned_pk (fdrop1 int, a int, fdrop2 int, b int,
+ PRIMARY KEY (a, b));
+ALTER TABLE fk_notpartitioned_pk DROP COLUMN fdrop1, DROP COLUMN fdrop2;
+CREATE TABLE fk_partitioned_fk (b int, fdrop1 int, a int) PARTITION BY RANGE (a, b);
+ALTER TABLE fk_partitioned_fk DROP COLUMN fdrop1;
+CREATE TABLE fk_partitioned_fk_1 (fdrop1 int, fdrop2 int, a int, fdrop3 int, b int);
+ALTER TABLE fk_partitioned_fk_1 DROP COLUMN fdrop1, DROP COLUMN fdrop2, DROP COLUMN fdrop3;
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_1 FOR VALUES FROM (0,0) TO (1000,1000);
+ALTER TABLE fk_partitioned_fk ADD FOREIGN KEY (a, b) REFERENCES fk_notpartitioned_pk;
+CREATE TABLE fk_partitioned_fk_2 (b int, fdrop1 int, fdrop2 int, a int);
+ALTER TABLE fk_partitioned_fk_2 DROP COLUMN fdrop1, DROP COLUMN fdrop2;
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_2 FOR VALUES FROM (1000,1000) TO (2000,2000);
+
+CREATE TABLE fk_partitioned_fk_3 (fdrop1 int, fdrop2 int, fdrop3 int, fdrop4 int, b int, a int)
+ PARTITION BY HASH (a);
+ALTER TABLE fk_partitioned_fk_3 DROP COLUMN fdrop1, DROP COLUMN fdrop2,
+ DROP COLUMN fdrop3, DROP COLUMN fdrop4;
+CREATE TABLE fk_partitioned_fk_3_0 PARTITION OF fk_partitioned_fk_3 FOR VALUES WITH (MODULUS 5, REMAINDER 0);
+CREATE TABLE fk_partitioned_fk_3_1 PARTITION OF fk_partitioned_fk_3 FOR VALUES WITH (MODULUS 5, REMAINDER 1);
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_3
+ FOR VALUES FROM (2000,2000) TO (3000,3000);
+
+-- these inserts, targetting both the partition directly as well as the
+-- partitioned table, should all fail
+INSERT INTO fk_partitioned_fk (a,b) VALUES (500, 501);
+INSERT INTO fk_partitioned_fk_1 (a,b) VALUES (500, 501);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (1500, 1501);
+INSERT INTO fk_partitioned_fk_2 (a,b) VALUES (1500, 1501);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (2500, 2502);
+INSERT INTO fk_partitioned_fk_3 (a,b) VALUES (2500, 2502);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (2501, 2503);
+INSERT INTO fk_partitioned_fk_3 (a,b) VALUES (2501, 2503);
+
+-- but if we insert the values that make them valid, then they work
+INSERT INTO fk_notpartitioned_pk VALUES (500, 501), (1500, 1501),
+ (2500, 2502), (2501, 2503);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (500, 501);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (1500, 1501);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (2500, 2502);
+INSERT INTO fk_partitioned_fk (a,b) VALUES (2501, 2503);
+
+-- this update fails because there is no referenced row
+UPDATE fk_partitioned_fk SET a = a + 1 WHERE a = 2501;
+-- but we can fix it thusly:
+INSERT INTO fk_notpartitioned_pk (a,b) VALUES (2502, 2503);
+UPDATE fk_partitioned_fk SET a = a + 1 WHERE a = 2501;
+
+-- these updates would leave lingering rows in the referencing table; disallow
+UPDATE fk_notpartitioned_pk SET b = 502 WHERE a = 500;
+UPDATE fk_notpartitioned_pk SET b = 1502 WHERE a = 1500;
+UPDATE fk_notpartitioned_pk SET b = 2504 WHERE a = 2500;
+ALTER TABLE fk_partitioned_fk DROP CONSTRAINT fk_partitioned_fk_a_fkey;
+-- done.
+DROP TABLE fk_notpartitioned_pk, fk_partitioned_fk;
+
+-- Test some other exotic foreign key features: MATCH SIMPLE, ON UPDATE/DELETE
+-- actions
+CREATE TABLE fk_notpartitioned_pk (a int, b int, primary key (a, b));
+CREATE TABLE fk_partitioned_fk (a int default 2501, b int default 142857) PARTITION BY LIST (a);
+CREATE TABLE fk_partitioned_fk_1 PARTITION OF fk_partitioned_fk FOR VALUES IN (NULL,500,501,502);
+ALTER TABLE fk_partitioned_fk ADD FOREIGN KEY (a, b)
+ REFERENCES fk_notpartitioned_pk MATCH SIMPLE
+ ON DELETE SET NULL ON UPDATE SET NULL;
+CREATE TABLE fk_partitioned_fk_2 PARTITION OF fk_partitioned_fk FOR VALUES IN (1500,1502);
+CREATE TABLE fk_partitioned_fk_3 (a int, b int);
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_3 FOR VALUES IN (2500,2501,2502,2503);
+
+-- this insert fails
+INSERT INTO fk_partitioned_fk (a, b) VALUES (2502, 2503);
+INSERT INTO fk_partitioned_fk_3 (a, b) VALUES (2502, 2503);
+-- but since the FK is MATCH SIMPLE, this one doesn't
+INSERT INTO fk_partitioned_fk_3 (a, b) VALUES (2502, NULL);
+-- now create the referenced row ...
+INSERT INTO fk_notpartitioned_pk VALUES (2502, 2503);
+--- and now the same insert work
+INSERT INTO fk_partitioned_fk_3 (a, b) VALUES (2502, 2503);
+-- this always works
+INSERT INTO fk_partitioned_fk (a,b) VALUES (NULL, NULL);
+
+-- ON UPDATE SET NULL
+SELECT tableoid::regclass, a, b FROM fk_partitioned_fk WHERE b IS NULL ORDER BY a;
+UPDATE fk_notpartitioned_pk SET a = a + 1 WHERE a = 2502;
+SELECT tableoid::regclass, a, b FROM fk_partitioned_fk WHERE b IS NULL ORDER BY a;
+
+-- ON DELETE SET NULL
+INSERT INTO fk_partitioned_fk VALUES (2503, 2503);
+SELECT count(*) FROM fk_partitioned_fk WHERE a IS NULL;
+DELETE FROM fk_notpartitioned_pk;
+SELECT count(*) FROM fk_partitioned_fk WHERE a IS NULL;
+
+-- ON UPDATE/DELETE SET DEFAULT
+ALTER TABLE fk_partitioned_fk DROP CONSTRAINT fk_partitioned_fk_a_fkey;
+ALTER TABLE fk_partitioned_fk ADD FOREIGN KEY (a, b)
+ REFERENCES fk_notpartitioned_pk
+ ON DELETE SET DEFAULT ON UPDATE SET DEFAULT;
+INSERT INTO fk_notpartitioned_pk VALUES (2502, 2503);
+INSERT INTO fk_partitioned_fk_3 (a, b) VALUES (2502, 2503);
+-- this fails, because the defaults for the referencing table are not present
+-- in the referenced table:
+UPDATE fk_notpartitioned_pk SET a = 1500 WHERE a = 2502;
+-- but inserting the row we can make it work:
+INSERT INTO fk_notpartitioned_pk VALUES (2501, 142857);
+UPDATE fk_notpartitioned_pk SET a = 1500 WHERE a = 2502;
+SELECT * FROM fk_partitioned_fk WHERE b = 142857;
+
+-- ON UPDATE/DELETE CASCADE
+ALTER TABLE fk_partitioned_fk DROP CONSTRAINT fk_partitioned_fk_a_fkey;
+ALTER TABLE fk_partitioned_fk ADD FOREIGN KEY (a, b)
+ REFERENCES fk_notpartitioned_pk
+ ON DELETE CASCADE ON UPDATE CASCADE;
+UPDATE fk_notpartitioned_pk SET a = 2502 WHERE a = 2501;
+SELECT * FROM fk_partitioned_fk WHERE b = 142857;
+
+-- Now you see it ...
+SELECT * FROM fk_partitioned_fk WHERE b = 142857;
+DELETE FROM fk_notpartitioned_pk WHERE b = 142857;
+-- now you don't.
+SELECT * FROM fk_partitioned_fk WHERE a = 142857;
+
+-- verify that DROP works
+DROP TABLE fk_partitioned_fk_2;
+
+-- verify that attaching a table checks that the existing data satisfies the
+-- constraint
+CREATE TABLE fk_partitioned_fk_2 (a int, b int) PARTITION BY RANGE (b);
+CREATE TABLE fk_partitioned_fk_2_1 PARTITION OF fk_partitioned_fk_2 FOR VALUES FROM (0) TO (1000);
+CREATE TABLE fk_partitioned_fk_2_2 PARTITION OF fk_partitioned_fk_2 FOR VALUES FROM (1000) TO (2000);
+INSERT INTO fk_partitioned_fk_2 VALUES (1600, 601), (1600, 1601);
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_2
+ FOR VALUES IN (1600);
+INSERT INTO fk_notpartitioned_pk VALUES (1600, 601), (1600, 1601);
+ALTER TABLE fk_partitioned_fk ATTACH PARTITION fk_partitioned_fk_2
+ FOR VALUES IN (1600);
+
+-- leave these tables around intentionally
DROP TABLE test_foreign_constraints;
DROP TABLE test_primary_constraints;
+-- Test foreign key behavior
+create table inh_fk_1 (a int primary key);
+insert into inh_fk_1 values (1), (2), (3);
+create table inh_fk_2 (x int primary key, y int references inh_fk_1 on delete cascade);
+insert into inh_fk_2 values (11, 1), (22, 2), (33, 3);
+create table inh_fk_2_child () inherits (inh_fk_2);
+insert into inh_fk_2_child values (111, 1), (222, 2);
+delete from inh_fk_1 where a = 1;
+select * from inh_fk_1 order by 1;
+select * from inh_fk_2 order by 1, 2;
+drop table inh_fk_1, inh_fk_2, inh_fk_2_child;
+
-- Test that parent and child CHECK constraints can be created in either order
create table p1(f1 int);
create table p1_c1() inherits(p1);
projects / users / gsingh / postgres.git / commitdiff