Function get_hash_mem

src/backend/executor/nodeHash.c:4133–4145

* Convert the hash memory limit to an integer number of kilobytes, * that is something comparable to work_mem. Like work_mem, we clamp * the result to ensure that multiplying it by 1024 fits in a long int. * * This is deprecated since it may understate the actual memory limit. * It is unused in core and will eventually be removed. */

 * It is unused in core and will eventually be removed.
 */
int
get_hash_mem(void)
{
	size_t		mem_limit = get_hash_memory_limit();

	/* Remove the kilobyte factor */
	mem_limit /= 1024;

	/* Clamp to MAX_KILOBYTES, like work_mem */
	mem_limit = Min(mem_limit, (size_t) MAX_KILOBYTES);

	return (int) mem_limit;
}

/*
 * Convert AttrFilter to ScanKeyData and send these runtime filters to the