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mysql
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mysql-test
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suite
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ndb
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View File Name :
ndb_alter_table_dml.result
call mtr.add_suppression(".*NDB_SHARE.*Moving away for safety, but possible memleak"); use test; create table parent(a int primary key, b int, key(b)) engine=ndb; create table child(a int primary key, b int) engine=ndb; insert into parent values (1,1), (2,2), (3,3), (4,4); insert into parent select a+4, b+4 from parent; insert into parent select a+8, b+8 from parent; insert into parent select a+16, b+16 from parent; insert into parent select a+32, b+32 from parent; insert into parent select a+64, b+64 from parent; insert into parent select a+128, b+128 from parent; insert into parent select a+256, b+256 from parent; insert into parent select a+512, b+512 from parent; insert into parent select a+1024, b+1024 from parent; insert into parent select a+2048, b+2048 from parent; insert into parent select a+4096, b+4096 from parent; insert into child select * from parent; set ndb_join_pushdown = false; explain select count(*) from parent join child on (parent.b = child.a) where parent.b > 5; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE parent p0,p1,p2,p3,p4,p5,p6,p7 range b b 5 NULL 819 100.00 Using where with pushed condition ((`test`.`parent`.`b` > 5) and (`test`.`parent`.`b` is not null)); Using MRR 1 SIMPLE child p0,p1,p2,p3,p4,p5,p6,p7 eq_ref PRIMARY PRIMARY 4 test.parent.b 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select count(0) AS `count(*)` from `test`.`parent` join `test`.`child` where ((`test`.`child`.`a` = `test`.`parent`.`b`) and (`test`.`parent`.`b` > 5)) Starting engines... call queryload(10); call queryload(10); call queryload(10); call queryload(10); Beginning alter table child partition by key(a) partitions 4; alter table child partition by key(a) partitions 4; Completed. Ending test. Droping table parent drop table parent; drop table child; drop procedure queryload;