Re: no description function pg_sequence_last_value in the documents，but using \df+ pg_sequence_last_value get this function in the psql

"yanliang lei" <msdnchina@163.com> writes:
>  pg_catalog | pg_sequence_last_value | bigint       | regclass     | º¯Êý | ²»Îȶ¨ÐÔ | ²»°²ȫµÄ | pg170  | µ÷ÓÃÕß |
    | internal | pg_sequence_last_value | sequence last value 

I believe that's only intended as support for the pg_sequences view,
so it's not separately documented.  There are a fair number of other
view-supporting functions that we don't document either.

            regards, tom lane