EVOLUTION-MANAGER

Edit File: 1872.result

SET DEFAULT_STORAGE_ENGINE = 'tokudb'; DROP TABLE IF EXISTS foo; create table foo ( a int, b int, c int); insert into foo values (1,1,1),(1,2,2),(1,3,3),(2,1,1),(2,2,2),(2,3,3),(3,1,1),(3,2,2),(3,3,3); insert into foo values (4,4,1),(4,5,2),(4,6,3),(5,4,1),(5,5,2),(5,6,3),(6,4,1),(6,5,2),(6,6,3); insert into foo select * from foo; insert into foo select * from foo; insert into foo select * from foo; insert into foo select * from foo; insert into foo select * from foo; insert into foo select * from foo; insert into foo select * from foo; insert into foo select * from foo; insert into foo select * from foo; insert into foo select * from foo; insert into foo select * from foo; select count(*) from foo; count(*) 36864 alter table foo add index (a), add index (b); explain select * from foo where a=2 and b=2; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE foo index_merge a,b a,b 5,5 NULL NULL; Using intersect(a,b); Using where alter table foo drop index a; alter table foo add index (a) clustering=yes; explain select * from foo where a=2 and b=2; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE foo ref b,a a 5 const NULL; Using where alter table foo drop index a; alter table foo drop index b; alter table foo add index (a); alter table foo add index(b) clustering=yes; explain select * from foo where a=2 and b=2; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE foo ref a,b b 5 const NULL; Using where alter table foo drop index a; alter table foo drop index b; alter table foo add index (a) clustering=yes, add index (b) clustering=yes; explain select * from foo where a=2 and b=2; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE foo ref a,b a 5 const NULL; Using where DROP TABLE foo;