🔧 Postgres Source Code Walk-through : HTAB, a Generic Hash Table

The following is the source code of a hash table, written in dynahash.c



struct HTAB
{
HASHHDR *hctl; /* => shared control information */
HASHSEGMENT *dir; /* directory of segment starts */
HashValueFunc hash; /* hash function */
HashCompareFunc match; /* key comparison function */
...