Calculates the MD5 hash of string, returning the result in hexadecimal
postgres=#
postgres=# -- md5(string)
postgres=# --Calculates the MD5 hash of string, returning the result in hexadecimal
postgres=# select md5('A\\000oB'::bytea);
md5
----------------------------------
1160190c6528db499b50394519f167c4
(1 row)