Sathesh S <sathesh.sundaram@hotmail.com> writes:
> Im trying to get tables ending with numbers (last 8 characters should be numbers).
> For example: I have the tables "test_20160215" and "test_20160131" and "test_1". When i run the below sql im not
gettingany output.
> Select relname from pg_class where relname like '%[0-9]'
> Can someone please give some idea on this.
You're confusing SQL LIKE patterns with POSIX regexp patterns. "%" is
a wildcard only in the former; "[...]" is special only in the latter.
(The great thing about standards is there are so many to choose from :-()
A correct implementation of your stated requirement is
where relname ~ '[0-9]$'
or if you want to be picky about "last 8 characters" you could do
where relname ~ '[0-9]{8}$'
See
https://www.postgresql.org/docs/current/static/functions-matching.html
regards, tom lane
