If you need to "emulate" offset/limit (as PEAR::DB puts it) for db2 queries, you will definitely need to add array('cursor' => DB2_SCROLLABLE) to your db2_exec() call. Otherwise, you will get nothing useful from db2_fetch_{whatever}() when you try to (see following hack for example):
<?php
$limit = 10;
$offset = 20;
for ($i = 0; $i < $limit && $row = db2_fetch_array($result, $offset + $i); $i++) {
}
?>
You can accomplish the same time of thing using sub-selects, "with" statements and other things new to me in the world of DB2, but the more dynamically generated the queries, the more difficult it gets to implement limit/offset behavior on the fly.
