Return-Path: Received: from ensim.rackshack.net (root@localhost) by orafaq.net (8.11.6/8.11.6) with ESMTP id hAB6awo26574 for ; Tue, 11 Nov 2003 00:36:58 -0600 X-ClientAddr: 66.27.56.210 Received: from ns3.fatcity.com (rrcs-west-66-27-56-210.biz.rr.com [66.27.56.210]) by ensim.rackshack.net (8.11.6/8.11.6) with ESMTP id hAB6auc26569 for ; Tue, 11 Nov 2003 00:36:56 -0600 Received: from ns3.fatcity.com (localhost.localdomain [127.0.0.1]) by ns3.fatcity.com (8.12.8/8.12.8) with ESMTP id hAB3gUbP022662 for ; Mon, 10 Nov 2003 19:43:18 -0800 Received: (from root@localhost) by ns3.fatcity.com (8.12.8/8.12.5/Submit) id hAB3US6d020578 for oracle-l@orafaq.net; Mon, 10 Nov 2003 19:30:28 -0800 Received: by fatcity.com (05-Jun-2003/v1.0g-b73/bab) via fatcity.com id 005D63E7; Mon, 10 Nov 2003 19:29:26 -0800 Message-ID: Date: Mon, 10 Nov 2003 19:29:26 -0800 To: Multiple recipients of list ORACLE-L X-Comment: Oracle RDBMS Community Forum X-Sender: "Khedr, Waleed" Sender: ml-errors@fatcity.com Reply-To: ORACLE-L@fatcity.com Errors-To: ML-ERRORS@fatcity.com From: "Khedr, Waleed" Subject: RE: Interesting PL/SQL Puzzle Organization: Fat City Network Services, San Diego, California X-ListServer: v1.0g, build 73; ListGuru (c) 1996-2003 Bruce A. Bergman Precedence: bulk Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit The question was not if it's a good or bad code. The question was why? This is not the actual code that runs, just something that explains the issue :) So let's make it more interesting: Let's keep the proc size unchanged while moving the end-if closer to the main if clause, and changing if false --> if true. Also let's make it return without trying all the code below. It does not speed up, still nine times slower!! Here is the proc: CREATE OR REPLACE PROCEDURE IA.test_plsql2 (var1 in out varchar2, var2 in out varchar2, out1 in out varchar2, out2 in out varchar2) as pat1 varchar2(1000) := '%tttttttttttttttttt%'; pat2 varchar2(1000) := 'lllllllllllllllllllllll'; pat3 varchar2(1000) := '%dfddddddddddddddddddiii%'; pat4 varchar2(1000) := 'yyyyyyyyyyyyyyyyyyyyyyyyy'; begin if true then var1 := 'aaa'; return; end if; -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- -- if var1 like pat3 then if var2 like pat1 then out1 := pat2; else out1 := pat4; end if; end if; -- end; / -----Original Message----- Sent: Monday, November 10, 2003 5:34 PM To: Multiple recipients of list ORACLE-L Hi! NAME SHARABLE_MEM ----------- ------------ TEST_PLSQL1 185607 TEST_PLSQL5 9123 A lot of junk, right? :) PL/SQL engine works with interpretive code, it does not have any optimizations -- here I do simplify, so do not consider this statement as an absolute truth -- like, e.g. most of the C compilers have. It has its own rules that are not clear, usually. dbms_profiler won't help here (It could mislead, however. For a good example see recent post of Raj), IMHO. As I told: "I would suggest to consider some simple things: . standard Oracle and your application's package(s) dependencies . proper datatypes usage " These two things are simple but important. So, I would sugget to change it to (sorry for dirty coding): CREATE OR REPLACE PACKAGE test IS PROCEDURE test_plsql2 ( var1 in out varchar2 , var2 in out varchar2 , out1 in out varchar2 , out2 in out varchar2 ); END; / CREATE OR REPLACE PACKAGE BODY test IS pat1 CONSTANT varchar2(1000) := '%tttttttttttttttttt%'; pat2 CONSTANT varchar2(1000) := 'lllllllllllllllllllllll'; pat3 CONSTANT varchar2(1000) := '%dfddddddddddddddddddiii%'; pat4 CONSTANT varchar2(1000) := 'yyyyyyyyyyyyyyyyyyyyyyyyy'; ls VARCHAR2(1000); b1 BOOLEAN; b2 BOOLEAN; PROCEDURE test_plsql2 ( var1 in out varchar2 , var2 in out varchar2 , out1 in out varchar2 , out2 in out varchar2 ); begin if false then b1 := var1 LIKE pat3; b2 := var2 LIKE pat1; -- if b1 then if b2 then ls := pat2; else ls := pat4; end if; end if; . out1 := ls; END; or something alike, hope you get the idea. On my system it gives: 00:01:28.12 vs 00:00:08.60. > When I looked at the C code generated by the native compilation, I was not > very pleased the way native compilation works. I think this statement of yours does answer your original question -- bad PL/SQL coding --> bad NC results. HTH, -- Vladimir Begun The statements and opinions expressed here are my own and do not necessarily represent those of Oracle Corporation. Khedr, Waleed wrote: > Below are two dummy procs that are good enough to explain the issue (Jared > forgive me for posting this big code). > All the code in proc test_plsql1 is inside an IF clause that will not run. [...] > proc test_3 ran 30 million times in 9 minutes while test_2 ran in 20 > minutes. > Also test_2 required more CPU resources while running. > > Also I tried native compilation, which did not do a lot (only 10 % faster). > When I looked at the C code generated by the native compilation, I was not > very pleased the way native compilation works. > > Does anybody have a clue why? > > I tried to include the proc in a package and pin it but there was no > difference. -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Vladimir Begun INET: Vladimir.Begun@oracle.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru@fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Khedr, Waleed INET: Waleed.Khedr@FMR.COM Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru@fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).