[GENERAL] Seems like bug in 9.1.3, need to confirm.

[AI Rumman]

HI,

I am working on Postgresql 9.1.3.
I executed the following query and got an error:
 select relname, pg_size_pretty(pg_table_size(relname::text)) as s from
pg_stat_user_tables order by pg_table_size(relname::text) desc  limit 10;
ERROR:  relation "tab_20130206" does not exist

That table does not exist in the db, that's correct. But is it right I am
getting the error or it is a bug?

Thanks.