189 lines
5.3 KiB
Plaintext
189 lines
5.3 KiB
Plaintext
# t/index_merge_myisam.test
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#
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# Index merge tests
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#
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# Last update:
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# 2006-08-07 ML test refactored (MySQL 5.1)
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# Main code of several index_merge tests
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# -> include/index_merge*.inc
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# wrapper t/index_merge_innodb.test sources now several
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# include/index_merge*.inc files
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#
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let $engine_type= MyISAM;
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# MyISAM supports Merge tables
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let $merge_table_support= 1;
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--source include/index_merge1.inc
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--source include/index_merge_ror.inc
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--source include/index_merge2.inc
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--source include/index_merge_2sweeps.inc
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--source include/index_merge_ror_cpk.inc
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--echo #
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--echo # Generic @@optimizer_switch tests (move those into a separate file if
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--echo # we get another @@optimizer_switch user)
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--echo #
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select @@optimizer_switch;
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set optimizer_switch='index_merge=off,index_merge_union=off';
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select @@optimizer_switch;
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set optimizer_switch='index_merge_union=on';
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select @@optimizer_switch;
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set optimizer_switch='default,index_merge_sort_union=off';
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select @@optimizer_switch;
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch=4;
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch=NULL;
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch='default,index_merge';
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch='index_merge=index_merge';
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch='index_merge=on,but...';
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch='index_merge=';
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch='index_merge';
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch='on';
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch='index_merge=on,index_merge=off';
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch='index_merge_union=on,index_merge_union=default';
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--error ER_WRONG_VALUE_FOR_VAR
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set optimizer_switch='default,index_merge=on,index_merge=off,default';
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set optimizer_switch=default;
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set optimizer_switch='index_merge=off,index_merge_union=off,default';
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select @@optimizer_switch;
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set optimizer_switch=default;
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# Check setting defaults for global vars
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select @@global.optimizer_switch;
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set @@global.optimizer_switch=default;
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select @@global.optimizer_switch;
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--echo #
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--echo # Check index_merge's @@optimizer_switch flags
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--echo #
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select @@optimizer_switch;
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (a int, b int, c int, filler char(100),
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key(a), key(b), key(c));
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insert into t1 select
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A.a * B.a*10 + C.a*100,
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A.a * B.a*10 + C.a*100,
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A.a,
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'filler'
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from t0 A, t0 B, t0 C;
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--echo This should use union:
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explain select * from t1 where a=1 or b=1;
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--echo This should use ALL:
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set optimizer_switch='default,index_merge=off';
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explain select * from t1 where a=1 or b=1;
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--echo This should use sort-union:
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set optimizer_switch='default,index_merge_union=off';
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explain select * from t1 where a=1 or b=1;
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--echo This will use sort-union:
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set optimizer_switch=default;
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explain select * from t1 where a<1 or b <1;
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--echo This should use ALL:
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set optimizer_switch='default,index_merge_sort_union=off';
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explain select * from t1 where a<1 or b <1;
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--echo This should use ALL:
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set optimizer_switch='default,index_merge=off';
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explain select * from t1 where a<1 or b <1;
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--echo This will use sort-union:
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set optimizer_switch='default,index_merge_union=off';
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explain select * from t1 where a<1 or b <1;
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alter table t1 add d int, add key(d);
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update t1 set d=a;
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--echo This will use sort_union:
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set optimizer_switch=default;
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explain select * from t1 where (a=3 or b in (1,2)) and (c=3 or d=4);
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--echo And if we disable sort_union, union:
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set optimizer_switch='default,index_merge_sort_union=off';
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explain select * from t1 where (a=3 or b in (1,2)) and (c=3 or d=4);
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drop table t1;
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# Now test that intersection can be disabled
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create table t1 (
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a int, b int, c int,
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filler1 char(200), filler2 char(200),
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key(a),key(b),key(c)
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);
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insert into t1
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select A.a+10*B.a, A.a+10*B.a, A.a+10*B.a+100*C.a, 'foo', 'bar'
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from t0 A, t0 B, t0 C, t0 D where D.a<5;
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--echo This should be intersect:
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set optimizer_switch=default;
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explain select * from t1 where a=10 and b=10;
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--echo No intersect when index_merge is disabled:
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set optimizer_switch='default,index_merge=off';
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explain select * from t1 where a=10 and b=10;
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--echo No intersect if it is disabled:
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set optimizer_switch='default,index_merge_intersection=off';
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explain select * from t1 where a=10 and b=10;
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--echo Do intersect when union was disabled
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set optimizer_switch='default,index_merge_union=off';
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explain select * from t1 where a=10 and b=10;
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--echo Do intersect when sort_union was disabled
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set optimizer_switch='default,index_merge_sort_union=off';
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explain select * from t1 where a=10 and b=10;
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# Now take union-of-intersection and see how we can disable parts of it
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--echo This will use intersection inside a union:
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set optimizer_switch=default;
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explain select * from t1 where a=10 and b=10 or c=10;
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--echo Should be only union left:
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set optimizer_switch='default,index_merge_intersection=off';
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explain select * from t1 where a=10 and b=10 or c=10;
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--echo This will switch to sort-union (intersection will be gone, too,
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--echo thats a known limitation:
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set optimizer_switch='default,index_merge_union=off';
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explain select * from t1 where a=10 and b=10 or c=10;
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set optimizer_switch=default;
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show variables like 'optimizer_switch';
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drop table t0, t1;
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