Function SysCacheInvalidate

src/backend/utils/cache/syscache.c:1688–1699

* SysCacheInvalidate * * Invalidate entries in the specified cache, given a hash value. * See CatCacheInvalidate() for more info. * * This routine is only quasi-public: it should only be used by inval.c. */

 *	This routine is only quasi-public: it should only be used by inval.c.
 */
void
SysCacheInvalidate(int cacheId, uint32 hashValue)
{
	if (cacheId < 0 || cacheId >= SysCacheSize)
		elog(ERROR, "invalid cache ID: %d", cacheId);

	/* if this cache isn't initialized yet, no need to do anything */
	if (!PointerIsValid(SysCache[cacheId]))
		return;

	CatCacheInvalidate(SysCache[cacheId], hashValue);
}

/*
 * Certain relations that do not have system caches send snapshot invalidation