Description:
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In PHP 5.3.10 and PostgreSQL 9.1, when executing PDOStatement::fetchAll(), if the retrieved data busts the PHP memory limit, the script dies quietly, without throwing an "out of memory" error.

Test script:
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//ini_set('memory_limit','256M');
$dsn=;//appropriate Data Source Name string
$sql=;//any query that returns slightly more data than the PHP memory limit allows (default limit is 128 MB on my server)
$db=new PDO($dsn);
$result=$db->query($sql);
$datarray=$result->fetchAll();//fetch all rows into an array


Expected result:
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When fetchAll() retrieves too much data, the script dies quietly, instead of throwing an "out of memory" error.
When I uncomment the first line, the script runs to completion, thus proving that the quiet death was due to lack of memory.

The problem seems to relate to the postgresql driver, as the same thing happens when I use pg_connect/pg_query/pg_fetch_all instead of PDO to get data from the same query.

This is the only PHP "out of memory" condition I've ever seen where no error is thrown.