Function CatalogCacheFlushCatalog

src/backend/utils/cache/catcache.c:719–742

* CatalogCacheFlushCatalog * * Flush all catcache entries that came from the specified system catalog. * This is needed after VACUUM FULL/CLUSTER on the catalog, since the * tuples very likely now have different TIDs than before. (At one point * we also tried to force re-execution of CatalogCacheInitializeCache for * the cache(s) on that catalog. This is a bad idea since it leads to all

 *	this assumes the tupdesc of a cachable system table will not change...)
 */
void
CatalogCacheFlushCatalog(Oid catId)
{
	slist_iter	iter;

	CACHE_elog(DEBUG2, "CatalogCacheFlushCatalog called for %u", catId);

	slist_foreach(iter, &CacheHdr->ch_caches)
	{
		CatCache   *cache = slist_container(CatCache, cc_next, iter.cur);

		/* Does this cache store tuples of the target catalog? */
		if (cache->cc_reloid == catId)
		{
			/* Yes, so flush all its contents */
			ResetCatalogCache(cache);

			/* Tell inval.c to call syscache callbacks for this cache */
			CallSyscacheCallbacks(cache->id, 0);
		}
	}

	CACHE_elog(DEBUG2, "end of CatalogCacheFlushCatalog call");
}

/*
 *		InitCatCache