Re: question about reg. expression

On Wed, Jan 19, 2011 at 08:17:50AM -0500, Stephen Belcher wrote:
> Another way to match multiple occurrences is to use curly brackets with a
> number, like:
> select 'ab' ~ '^[a-z]{2}$';
>
> It can be done with a range of numbers as well:
> select 'ab' ~ '^[a-z]{2,4}$';
> select 'abab' ~ '^[a-z]{2,4}$';
>
> I believe, however, that the curly brackets notation was introduced in 9.0
> and is not available in earlier versions.
>
> --Stephen
>

That is not so. POSIX regular expressions, including the curly backet
notation, are available in all current supported releases of PostgreSQL:

http://www.postgresql.org/docs/8.2/static/functions-matching.html#FUNCTIONS-POSIX-REGEXP

I did not bother to check our local documentation for earlier releases
as to how much earlier such support was available.

Cheers,
Ken