From: Erik Jones <erik@myemma.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: weigelt@metux.de, pgsql-sql <pgsql-sql@postgresql.org>
Subject: Re: Finding broken regex'es
Date: Wed, 3 Oct 2007 00:43:16 -0500
Message-ID: <9F9943E3-5114-457A-ABE7-D41CBCAFFE93@myemma.com> (raw)
In-Reply-To: <1595.1191383289@sss.pgh.pa.us>
References: <20071002202313.GB18506@nibiru.local>
<51E80F93-35D0-41A0-B9C0-A256A806C971@myemma.com>
<1595.1191383289@sss.pgh.pa.us>
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)
Emma helps organizations everywhere communicate & market in style.
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To: pgsql-sql@postgresql.org
Cc: erik@myemma.com, tgl@sss.pgh.pa.us
Subject: Re: Finding broken regex'es
In-Reply-To: <9F9943E3-5114-457A-ABE7-D41CBCAFFE93@myemma.com>
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