Function GetCatCacheHashValue

src/backend/utils/cache/catcache.c:1538–1555

* GetCatCacheHashValue * * Compute the hash value for a given set of search keys. * * The reason for exposing this as part of the API is that the hash value is * exposed in cache invalidation operations, so there are places outside the * catcache code that need to be able to compute the hash values. */

 * catcache code that need to be able to compute the hash values.
 */
uint32
GetCatCacheHashValue(CatCache *cache,
					 Datum v1,
					 Datum v2,
					 Datum v3,
					 Datum v4)
{
	/*
	 * one-time startup overhead for each cache
	 */
	if (cache->cc_tupdesc == NULL)
		CatalogCacheInitializeCache(cache);

	/*
	 * calculate the hash value
	 */
	return CatalogCacheComputeHashValue(cache, cache->cc_nkeys, v1, v2, v3, v4);
}


/*