Function CacheInvalidateRelcacheByTuple

src/backend/utils/cache/inval.c:1410–1425

* CacheInvalidateRelcacheByTuple * As above, but relation is identified by passing its pg_class tuple. */

 *		As above, but relation is identified by passing its pg_class tuple.
 */
void
CacheInvalidateRelcacheByTuple(HeapTuple classTuple)
{
	Form_pg_class classtup = (Form_pg_class) GETSTRUCT(classTuple);
	Oid			databaseId;
	Oid			relationId;

	PrepareInvalidationState();

	relationId = classtup->oid;
	if (classtup->relisshared)
		databaseId = InvalidOid;
	else
		databaseId = MyDatabaseId;
	RegisterRelcacheInvalidation(databaseId, relationId);
}

/*
 * CacheInvalidateRelcacheByRelid