totally tangential to this but just have to share learned this last week that md5's are also 128 bits and so will fit perfectly in a uuid type in postgres, sav

totally tangential to this but just have to share learned this last week that md5's are also 128 bits and so will fit perfectly in a uuid type in postgres, saving space in the physical table and indexes, and giving better index performance. So if youre storing md5 hashes, use UUID!