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Re: BUG #5531: REGEXP_ REPLACE causes connection drop

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: "Ola Sergatchov" <ola_sergatchov(at)hotmail(dot)com>
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #5531: REGEXP_ REPLACE causes connection drop
Date: 2010-06-30 16:25:32
Message-ID: 11912.1277915132@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-bugs
"Ola Sergatchov" <ola_sergatchov(at)hotmail(dot)com> writes:
> The following bug has been logged online:

> Bug reference:      5531
> Logged by:          Ola Sergatchov
> Email address:      ola_sergatchov(at)hotmail(dot)com
> PostgreSQL version: 8.1.18
> Operating system:   RedHat Linux 4.1.2-46
> Description:        REGEXP_ REPLACE causes connection drop
> Details: 

> Passing large string to REGEXP_REPLACE function causes the DB connection to
> drop. We executed this function with very large strings (20,000 - 250,000
> characters) both from RedHat and PgAdmin and in both cases the function
> fails to return and eventually the connection drops.

I don't see any such misbehavior here: it either completes or reports
"out of memory".  Could we see a specific problematic example?  Also
what sort of hardware are you on?  (32-bit vs 64-bit seems relevant
in particular.)

			regards, tom lane

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