Function RelationIdIsInInitFile

src/backend/utils/cache/relcache.c:6776–6792

* Determine whether a given relation (identified by OID) is one of the ones * we should store in a relcache init file. * * We must cache all nailed rels, and for efficiency we should cache every rel * that supports a syscache. The former set is almost but not quite a subset * of the latter. The special cases are relations where * RelationCacheInitializePhase2/3 chooses to nail for efficienc

 * which do not support any syscache.
 */
bool
RelationIdIsInInitFile(Oid relationId)
{
	if (relationId == SharedSecLabelRelationId ||
		relationId == TriggerRelidNameIndexId ||
		relationId == DatabaseNameIndexId ||
		relationId == SharedSecLabelObjectIndexId)
	{
		/*
		 * If this Assert fails, we don't need the applicable special case
		 * anymore.
		 */
		Assert(!RelationSupportsSysCache(relationId));
		return true;
	}
	return RelationSupportsSysCache(relationId);
}

/*
 * Invalidate (remove) the init file during commit of a transaction that