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29 lines
818 B
Plaintext
29 lines
818 B
Plaintext
#
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# Table elimination (MWL#17) tests that need debug build
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#
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# In MariaDB 5.3, one can switch table_elimination on/off without debug, too:
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## --source include/have_debug.inc
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--disable_warnings
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drop table if exists t1, t2;
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--enable_warnings
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# Check if optimizer_switch works
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create table t1 (a int);
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insert into t1 values (0),(1),(2),(3);
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create table t2 (a int primary key, b int)
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as select a, a as b from t1 where a in (1,2);
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explain select t1.a from t1 left join t2 on t2.a=t1.a;
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set optimizer_switch='table_elimination=off';
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explain select t1.a from t1 left join t2 on t2.a=t1.a;
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set optimizer_switch='table_elimination=on';
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explain select t1.a from t1 left join t2 on t2.a=t1.a;
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set optimizer_switch='table_elimination=default';
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explain select t1.a from t1 left join t2 on t2.a=t1.a;
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drop table t1, t2;
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