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Fix SET CONSTRAINTS .. DEFERRED on partitioned tables

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SET CONSTRAINTS ... DEFERRED failed on partitioned tables, because of a
sanity check that ensures that the affected constraints have triggers.
On partitioned tables, the triggers are in the leaf partitions, not in
the partitioned relations themselves, so the sanity check fails.
Removing the sanity check solves the problem, because the code needed to
support the case is already there.

Backpatch to 11.

Note: deferred unique constraints are not affected by this bug, because
they do have triggers in the parent partitioned table.  I did not add a
test for this scenario.

Discussion: https://postgr.es/m/20191105212915.GA11324@alvherre.pgsql
This commit is contained in:
Alvaro Herrera
2019-11-07 13:59:24 -03:00
parent a7145f6bc8
commit b4bcc6bfdf
3 changed files with 97 additions and 14 deletions
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10
src/backend/commands/trigger.c
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@ -5510,13 +5510,10 @@ AfterTriggerSetState(ConstraintsSetStmt *stmt)
foreach(lc, conoidlist)
{
Oid conoid = lfirst_oid(lc);
bool found;
ScanKeyData skey;
SysScanDesc tgscan;
HeapTuple htup;
found = false;
ScanKeyInit(&skey,
Anum_pg_trigger_tgconstraint,
BTEqualStrategyNumber, F_OIDEQ,
@ -5537,16 +5534,9 @@ AfterTriggerSetState(ConstraintsSetStmt *stmt)
*/
if (pg_trigger->tgdeferrable)
tgoidlist = lappend_oid(tgoidlist, pg_trigger->oid);
found = true;
}
systable_endscan(tgscan);
/* Safety check: a deferrable constraint should have triggers */
if (!found)
elog(ERROR, "no triggers found for constraint with OID %u",
conoid);
}
table_close(tgrel, AccessShareLock);