Re: Question on the use of bracket expressions in Postgres

On Dec 15, 2005, at 0:29 , Jimmy Rowe wrote:

> select * from catalog where file_name like 'abc%def%.200[2-5]%';
> The following select keeps returning "(0 rows)".

LIKE doesn't consider [2-5] to be a range, but rather the literal
characters '[2-5]'. If you're looking for regex, take a look at the
POSIX regex operator ~

http://www.postgresql.org/docs/current/interactive/functions-
matching.html#FUNCTIONS-POSIX-REGEXP

See if something like file_name ~ 'abc.*def.*\.200[2-5]'

select '2003' ~ '200[2-5]' as "yup", '2006' ~ '200[2-5]' as "nope";
yup | nope
-----+------
t | f
(1 row)

Michael Glaesemann
grzm myrealbox com