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git-svn-id: file:///svn/mysql/tests/mysql-test@25492 c7de825b-a66e-492c-adef-691d508d4ae1
69 lines
1.6 KiB
Text
69 lines
1.6 KiB
Text
# test that the query planner picks clustering keys for joins
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# create table s
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--disable_warnings
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drop table if exists s;
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--enable_warnings
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create table s (a int, b int, c int) engine=tokudb;
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# populate table s
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let $a = 10;
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while ($a) {
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let $b = 10;
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while ($b) {
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let $c = 10;
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while ($c) {
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eval insert into s values ($a,$b,$c);
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dec $c;
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}
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dec $b;
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}
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dec $a;
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}
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# create table t
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--disable_warnings
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drop table if exists t;
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--enable_warnings
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create table t like s;
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insert into t select * from s;
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# join with no keys
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show create table s;
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show create table t;
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explain select straight_join s.a,t.a from s,t where s.b = t.b;
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# join with uncovered keys
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alter table s add key(b);
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alter table t add key(b);
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show create table s;
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show create table t;
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explain select straight_join s.a,t.a from s,t where s.b = t.b;
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# join with uncovered keys and covering keys
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# should pick the covering keys
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alter table s add key(b,a);
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alter table t add key(b,a);
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show create table s;
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show create table t;
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explain select straight_join s.a,t.a from s,t where s.b = t.b;
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# join with uncovered keys, covering keys and clustering keys
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# should pick the covering keys
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alter table s add clustering key(b);
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alter table t add clustering key(b);
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show create table s;
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show create table t;
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explain select straight_join s.a,t.a from s,t where s.b = t.b;
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# join with uncovered keys and clustering keys
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# should pick the clustering keys
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alter table s drop key b_2;
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alter table t drop key b_2;
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show create table s;
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show create table t;
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explain select straight_join s.a,t.a from s,t where s.b = t.b;
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# cleanup
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drop table s,t;
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