On Oct 2, 2007, at 10:48 PM, Tom Lane wrote:
> Erik Jones <erik@myemma.com> writes:
>> IIRC, if they're PERL compatible which it would seem from the php
>> function you're using, no. Postgres supports POSIX regexes but not
>> (right now anyway) PERL regexes.
>
> Actually what we support are Tcl (Henry Spencer) regexes, which are
> about as powerful as Perl's but have a few minor incompatibilities.
> Tcl and Perl regexes are both supersets of the POSIX requirements.
>
Excellent point of information. I was really just trying to focus on
why the Postgres regex engine wouldn't be equivalent to the matching
functionality of php's preg_* functions. One example would be look
behind assertions. Btw, am I crazy or do I remember someone
mentioning that support for Perl regexes possibly being added to
Postgres in the future.
Erik Jones
Software Developer | Emma®
erik@myemma.com
800.595.4401 or 615.292.5888
615.292.0777 (fax)
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