oops no sorry that would only make your originaly query work . That would run your query below with optimizer_features_enabled to 9.2.0 --- On Tue, 24/11/09, LS Cheng <exriscer@xxxxxxxxx> wrote: From: LS Cheng <exriscer@xxxxxxxxx> Subject: Re: OPT_PARAM To: "hrishy" <hrishys@xxxxxxxxxxx> Cc: "Dion Cho" <ukja.dion@xxxxxxxxx>, "Oracle Mailinglist" <oracle-l@xxxxxxxxxxxxx> Date: Tuesday, 24 November, 2009, 10:35 That will get me a list...? Thanks On Tue, Nov 24, 2009 at 11:33 AM, hrishy <hrishys@xxxxxxxxxxx> wrote: Hi This might just work ALTER SESSION SET EVENTS '10132 TRACE NAME CONTEXT FOREVER, LEVEL 1'; SELECT /*+ opt_param('optimizer_features_enable', '9.2.0') */ x, y, z FROM v_lsc WHERE x = 'S' OR y_date > to_date(:V1, 'MM/DD/YY HH24:MI:SS'); regards Hrishy