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Fix transition tables for partition/inheritance.

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We disallow row-level triggers with transition tables on child tables.
Transition tables for triggers on the parent table contain only those
columns present in the parent.  (We can't mix tuple formats in a
single transition table.)

Patch by Thomas Munro

Discussion: https://postgr.es/m/CA%2BTgmoZzTBBAsEUh4MazAN7ga%3D8SsMC-Knp-6cetts9yNZUCcg%40mail.gmail.com
This commit is contained in:
Andrew Gierth
2017-06-28 18:55:03 +01:00
parent 99255d73c0
commit 501ed02cf6
13 changed files with 1143 additions and 110 deletions
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24
src/backend/catalog/pg_inherits.c
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@@ -273,6 +273,30 @@ has_subclass(Oid relationId)
return result;
}
/*
* has_superclass - does this relation inherit from another? The caller
* should hold a lock on the given relation so that it can't be concurrently
* added to or removed from an inheritance hierarchy.
*/
bool
has_superclass(Oid relationId)
{
Relation catalog;
SysScanDesc scan;
ScanKeyData skey;
bool result;
catalog = heap_open(InheritsRelationId, AccessShareLock);
ScanKeyInit(&skey, Anum_pg_inherits_inhrelid, BTEqualStrategyNumber,
F_OIDEQ, ObjectIdGetDatum(relationId));
scan = systable_beginscan(catalog, InheritsRelidSeqnoIndexId, true,
NULL, 1, &skey);
result = HeapTupleIsValid(systable_getnext(scan));
systable_endscan(scan);
heap_close(catalog, AccessShareLock);
return result;
}
/*
* Given two type OIDs, determine whether the first is a complex type