BUG #5302: WIN1252 encoding causes server memory leak

The following bug has been logged online:

Bug reference:      5302
Logged by:          Florian Nigsch
Email address:      contact@flo.nigsch.com
PostgreSQL version: 8.4.2
Operating system:   x86_64 GNU/Linux 2.6.18-92.el5
Description:        WIN1252 encoding causes server memory leak
Details:

The following rapidly consumes server memory:

-- Causes leak:
SET client_encoding TO 'WIN1252';

BEGIN;
CREATE TEMP TABLE t1(pk INT PRIMARY KEY);

-- Repeat 1000 times
DECLARE mycur CURSOR WITH HOLD FOR SELECT * FROM t1;
FETCH 100 IN mycur;
SAVEPOINT mysp;
CLOSE mycur;
RELEASE mysp;
-- End repeat

COMMIT:


Tested on 8.4.0 and 8.4.2.   The above code is analogous to that produced by
the PSQLODBC driver.

The leak does not occur without the WIN1252 encoding setting.

http://pgfoundry.org/tracker/index.php?func=detail&aid=1010758&group_id=1000
125&atid=538