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# # Table elimination (MWL#17) tests that need debug build # # In MariaDB 5.3, one can switch table_elimination on/off without debug, too: ## --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;