Postgres Pro
Downloads
Home   >   mailing lists

Re: Extending Regular Expression bounds limit of 255. - Mailing list pgsql-sql

From alvherre
Subject Re: Extending Regular Expression bounds limit of 255.
Date
Msg-id 1275059495-sup-4074@alvh.no-ip.org
Whole thread Raw
In response to Re: Extending Regular Expression bounds limit of 255.  (Brent DeSpain <bd.postgres@gmail.com>)
Responses Re: Extending Regular Expression bounds limit of 255.  (Brent DeSpain <bd.postgres@gmail.com>)
List pgsql-sql
Tree view 
Excerpts from Brent DeSpain's message of jue may 27 18:55:55 -0400 2010:
> It looks like most of our tools are using the Perl version of regular
> expressions with an upper limit of a bound being 32766.  Is there any way to
> change this in PG?  Or can I change from POSIX to Perl?

See regcomp.c; you'll have to recompile.  The interesting constant is
DUPMAX (defined in regguts.h as per POSIX), but note that there's
arithmetic in repeat() with those values.  I wouldn't recommend doing
any of this unless you have time to figure out whether the algorithms
are efficient for larger values though.

-- 
Álvaro Herrera <alvherre@commandprompt.com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support

pgsql-sql by date:

Previous
From: Jasen Betts
Date:
Subject: Re: cast record type to array?
Next
From: Brent DeSpain
Date:
Subject: Re: Extending Regular Expression bounds limit of 255.