2026-03-12 20:23:15

tpt/tools/optimizer/optimizer_features_matrix.sql

@@ -0,0 +1,37 @@
+-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
+-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
+
+PROMPT display a matrix of optimizer parameters which change when changing optimizer_features_enabled...
+
+CREATE TABLE opt_param_matrix(
+    opt_features_enabled VARCHAR2(20) NOT NULL
+  , parameter            VARCHAR2(75) NOT NULL
+  , value                VARCHAR2(1000)
+)
+/
+
+CREATE TABLE opt_fix_matrix (
+    opt_features_enabled VARCHAR2(20) NOT NULL
+  , bugno                    NUMBER       
+  , value                    NUMBER
+  , sql_feature              VARCHAR2(100)
+  , description              VARCHAR2(100)
+  , optimizer_feature_enable VARCHAR2(25)
+  , event                    NUMBER
+  , is_default               NUMBER
+)
+/
+ 
+BEGIN
+    FOR i IN (select value from v$parameter_valid_values where name = 'optimizer_features_enable' order by ordinal) LOOP
+        EXECUTE IMMEDIATE 'alter session set optimizer_features_enable='''||i.value||'''';
+        EXECUTE IMMEDIATE 'insert into opt_param_matrix select :opt_features_enable, n.ksppinm, c.ksppstvl from sys.x$ksppi n, sys.x$ksppcv c where n.indx=c.indx' using i.value;
+        EXECUTE IMMEDIATE 'insert into opt_fix_matrix   select :opt_features_enable, bugno, value, sql_feature, description, optimizer_feature_enable, event, is_default FROM v$session_fix_control WHERE session_id=USERENV(''sid'')' using i.value;
+    END LOOP;
+END;
+/
+
+COMMIT;
+
+PROMPT To test, run: @cofep.sql 10.2.0.1 10.2.0.4
+