diff options
Diffstat (limited to 'mysql-test/r/index_merge_myisam.result')
| -rw-r--r-- | mysql-test/r/index_merge_myisam.result | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/mysql-test/r/index_merge_myisam.result b/mysql-test/r/index_merge_myisam.result index 19826aca43a..8a935d87457 100644 --- a/mysql-test/r/index_merge_myisam.result +++ b/mysql-test/r/index_merge_myisam.result @@ -1391,3 +1391,174 @@ WHERE `RUNID`= '' AND `SUBMITNR`= '' AND `ORDERNR`='' AND `PROGRAMM`='' AND `TESTID`='' AND `UCCHECK`=''; drop table t1; +# +# Generic @@optimizer_switch tests (move those into a separate file if +# we get another @@optimizer_switch user) +# +select @@optimizer_switch; +@@optimizer_switch +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on +set optimizer_switch='index_merge=off,index_merge_union=off'; +select @@optimizer_switch; +@@optimizer_switch +index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on +set optimizer_switch='index_merge_union=on'; +select @@optimizer_switch; +@@optimizer_switch +index_merge=off,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on +set optimizer_switch='default,index_merge_sort_union=off'; +select @@optimizer_switch; +@@optimizer_switch +index_merge=on,index_merge_union=on,index_merge_sort_union=off,index_merge_intersection=on +set optimizer_switch=4; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of '4' +set optimizer_switch=NULL; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'NULL' +set optimizer_switch='default,index_merge'; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'index_merge' +set optimizer_switch='index_merge=index_merge'; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'index_merge=index_merge' +set optimizer_switch='index_merge=on,but...'; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'but...' +set optimizer_switch='index_merge='; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'index_merge=' +set optimizer_switch='index_merge'; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'index_merge' +set optimizer_switch='on'; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'on' +set optimizer_switch='index_merge=on,index_merge=off'; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'index_merge=off' +set optimizer_switch='index_merge_union=on,index_merge_union=default'; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'index_merge_union=default' +set optimizer_switch='default,index_merge=on,index_merge=off,default'; +ERROR 42000: Variable 'optimizer_switch' can't be set to the value of 'index_merge=off,default' +set optimizer_switch=default; +set optimizer_switch='index_merge=off,index_merge_union=off,default'; +select @@optimizer_switch; +@@optimizer_switch +index_merge=off,index_merge_union=off,index_merge_sort_union=on,index_merge_intersection=on +set optimizer_switch=default; +select @@global.optimizer_switch; +@@global.optimizer_switch +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on +set @@global.optimizer_switch=default; +select @@global.optimizer_switch; +@@global.optimizer_switch +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on +# +# Check index_merge's @@optimizer_switch flags +# +select @@optimizer_switch; +@@optimizer_switch +index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on +create table t0 (a int); +insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t1 (a int, b int, c int, filler char(100), +key(a), key(b), key(c)); +insert into t1 select +A.a * B.a*10 + C.a*100, +A.a * B.a*10 + C.a*100, +A.a, +'filler' +from t0 A, t0 B, t0 C; +This should use union: +explain select * from t1 where a=1 or b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 2 Using union(a,b); Using where +This should use ALL: +set optimizer_switch='default,index_merge=off'; +explain select * from t1 where a=1 or b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL a,b NULL NULL NULL 1000 Using where +This should use sort-union: +set optimizer_switch='default,index_merge_union=off'; +explain select * from t1 where a=1 or b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 2 Using sort_union(a,b); Using where +This will use sort-union: +set optimizer_switch=default; +explain select * from t1 where a<1 or b <1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 38 Using sort_union(a,b); Using where +This should use ALL: +set optimizer_switch='default,index_merge_sort_union=off'; +explain select * from t1 where a<1 or b <1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL a,b NULL NULL NULL 1000 Using where +This should use ALL: +set optimizer_switch='default,index_merge=off'; +explain select * from t1 where a<1 or b <1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL a,b NULL NULL NULL 1000 Using where +This will use sort-union: +set optimizer_switch='default,index_merge_union=off'; +explain select * from t1 where a<1 or b <1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 38 Using sort_union(a,b); Using where +alter table t1 add d int, add key(d); +update t1 set d=a; +This will use sort_union: +set optimizer_switch=default; +explain select * from t1 where (a=3 or b in (1,2)) and (c=3 or d=4); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b,c,d a,b 5,5 NULL 3 Using sort_union(a,b); Using where +And if we disable sort_union, union: +set optimizer_switch='default,index_merge_sort_union=off'; +explain select * from t1 where (a=3 or b in (1,2)) and (c=3 or d=4); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b,c,d c,d 5,5 NULL 100 Using union(c,d); Using where +drop table t1; +create table t1 ( +a int, b int, c int, +filler1 char(200), filler2 char(200), +key(a),key(b),key(c) +); +insert into t1 +select A.a+10*B.a, A.a+10*B.a, A.a+10*B.a+100*C.a, 'foo', 'bar' +from t0 A, t0 B, t0 C, t0 D where D.a<5; +This should be intersect: +set optimizer_switch=default; +explain select * from t1 where a=10 and b=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 1 Using intersect(a,b); Using where +No intersect when index_merge is disabled: +set optimizer_switch='default,index_merge=off'; +explain select * from t1 where a=10 and b=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref a,b a 5 const 49 Using where +No intersect if it is disabled: +set optimizer_switch='default,index_merge_intersection=off'; +explain select * from t1 where a=10 and b=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref a,b a 5 const 49 Using where +Do intersect when union was disabled +set optimizer_switch='default,index_merge_union=off'; +explain select * from t1 where a=10 and b=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 1 Using intersect(a,b); Using where +Do intersect when sort_union was disabled +set optimizer_switch='default,index_merge_sort_union=off'; +explain select * from t1 where a=10 and b=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 1 Using intersect(a,b); Using where +This will use intersection inside a union: +set optimizer_switch=default; +explain select * from t1 where a=10 and b=10 or c=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b,c a,b,c 5,5,5 NULL 6 Using union(intersect(a,b),c); Using where +Should be only union left: +set optimizer_switch='default,index_merge_intersection=off'; +explain select * from t1 where a=10 and b=10 or c=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b,c a,c 5,5 NULL 54 Using union(a,c); Using where +This will switch to sort-union (intersection will be gone, too, +thats a known limitation: +set optimizer_switch='default,index_merge_union=off'; +explain select * from t1 where a=10 and b=10 or c=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b,c a,c 5,5 NULL 54 Using sort_union(a,c); Using where +set optimizer_switch=default; +show variables like 'optimizer_switch'; +Variable_name Value +optimizer_switch index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on +drop table t0, t1; |