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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;