| From: | Erik Jones <erik(at)myemma(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | weigelt(at)metux(dot)de, pgsql-sql <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: Finding broken regex'es |
| Date: | 2007-10-03 05:43:16 |
| Message-ID: | 9F9943E3-5114-457A-ABE7-D41CBCAFFE93@myemma.com |
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| Thread: | |
| Lists: | pgsql-sql |
On Oct 2, 2007, at 10:48 PM, Tom Lane wrote:
> Erik Jones <erik(at)myemma(dot)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(at)myemma(dot)com
800.595.4401 or 615.292.5888
615.292.0777 (fax)
Emma helps organizations everywhere communicate & market in style.
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