rolpassword text Password (possibly encrypted); null if none. If the password is encrypted, this column will begin with the string md5 followed by a 32-character hexadecimal MD5 hash. The MD5 hash will be of the user's password concatenated to their user name. For example, if user joe has password xyzzy, Postgres Pro will store the md5 hash of xyzzyjoe. A password that does not follow that format is assumed to be unencrypted.