Description:
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Running PHP5.1.0RC1, postgresql 8 server with v7.4.7 client libs (pretty sure native prepared statements are disabled).

When trying to execute this query:
$stmt = $db->prepare("SELECT ('0' || :param || '0')");
$stmt->execute(array(':param' => 123));

PDO actually executes this SQL statement: SELECT ('0' || :param || '0'), without replacing :param.

It seems like the parser thinks the whole "0' || :param || '0" part is quoted, though its not.

The query "SELECT (0 || :param || 0)" works as expected.