Function ResetCatalogCache

src/backend/utils/cache/catcache.c:642–682

* ResetCatalogCache * * Reset one catalog cache to empty. * * This is not very efficient if the target cache is nearly empty. * However, it shouldn't need to be efficient; we don't invoke it often. */

 * However, it shouldn't need to be efficient; we don't invoke it often.
 */
static void
ResetCatalogCache(CatCache *cache)
{
	dlist_mutable_iter iter;
	int			i;

	/* Remove each list in this cache, or at least mark it dead */
	dlist_foreach_modify(iter, &cache->cc_lists)
	{
		CatCList   *cl = dlist_container(CatCList, cache_elem, iter.cur);

		if (cl->refcount > 0)
			cl->dead = true;
		else
			CatCacheRemoveCList(cache, cl);
	}

	/* Remove each tuple in this cache, or at least mark it dead */
	for (i = 0; i < cache->cc_nbuckets; i++)
	{
		dlist_head *bucket = &cache->cc_bucket[i];

		dlist_foreach_modify(iter, bucket)
		{
			CatCTup    *ct = dlist_container(CatCTup, cache_elem, iter.cur);

			if (ct->refcount > 0 ||
				(ct->c_list && ct->c_list->refcount > 0))
			{
				ct->dead = true;
				/* list, if any, was marked dead above */
				Assert(ct->c_list == NULL || ct->c_list->dead);
			}
			else
				CatCacheRemoveCTup(cache, ct);
#ifdef CATCACHE_STATS
			cache->cc_invals++;
#endif
		}
	}
}

/*
 *		ResetCatalogCaches