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------------------------------------------------------------
revno: 2752
committer: Sergey Petrunya <psergey@xxxxxxxxxxxx>
branch nick: maria-5.1
timestamp: Thu 2009-10-29 20:50:33 +0300
message:
  MWL#17: Table elimination
  - add debug tests (were accidentally not pushed with the bulk of WL)
added:
  mysql-test/r/table_elim_debug.result
  mysql-test/t/table_elim_debug.test


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=== added file 'mysql-test/r/table_elim_debug.result'
--- mysql-test/r/table_elim_debug.result	1970-01-01 00:00:00 +0000
+++ mysql-test/r/table_elim_debug.result	2009-10-29 17:50:33 +0000
@@ -0,0 +1,22 @@
+drop table if exists t1, t2;
+create table t1 (a int);
+insert into t1 values (0),(1),(2),(3);
+create table t2 (a int primary key, b int) 
+as select a, a as b from t1 where a in (1,2);
+explain select t1.a from t1 left join t2 on t2.a=t1.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	4	
+set optimizer_switch='table_elimination=off';
+explain select t1.a from t1 left join t2 on t2.a=t1.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	4	
+1	SIMPLE	t2	eq_ref	PRIMARY	PRIMARY	4	test.t1.a	1	Using index
+set optimizer_switch='table_elimination=on';
+explain select t1.a from t1 left join t2 on t2.a=t1.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	4	
+set optimizer_switch='table_elimination=default';
+explain select t1.a from t1 left join t2 on t2.a=t1.a;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	4	
+drop table t1, t2;

=== added file 'mysql-test/t/table_elim_debug.test'
--- mysql-test/t/table_elim_debug.test	1970-01-01 00:00:00 +0000
+++ mysql-test/t/table_elim_debug.test	2009-10-29 17:50:33 +0000
@@ -0,0 +1,27 @@
+#
+# Table elimination (MWL#17) tests that need debug build
+#
+--source include/have_debug.inc
+
+--disable_warnings
+drop table if exists t1, t2;
+--enable_warnings
+
+# Check if optimizer_switch works
+
+create table t1 (a int);
+insert into t1 values (0),(1),(2),(3);
+
+create table t2 (a int primary key, b int) 
+  as select a, a as b from t1 where a in (1,2);
+
+explain select t1.a from t1 left join t2 on t2.a=t1.a;
+
+set optimizer_switch='table_elimination=off';
+explain select t1.a from t1 left join t2 on t2.a=t1.a;
+set optimizer_switch='table_elimination=on';
+explain select t1.a from t1 left join t2 on t2.a=t1.a;
+set optimizer_switch='table_elimination=default';
+explain select t1.a from t1 left join t2 on t2.a=t1.a;
+
+drop table t1, t2;