mariadb/mysql-test/t/delete_use_source.test

-- source include/have_innodb.inc
set sql_mode=oracle;
use test;
create or replace table tab_delete(c1 integer not null,c2 integer not null) engine=InnoDb;
create index tab_delete_c1 on tab_delete(c1);
create or replace view view_delete as select * from tab_delete where c1 in (0,1);
delimiter /;
CREATE or replace PROCEDURE gendata(a int, count int ) AS
  i INT:=0;
BEGIN
  FOR i IN 1 .. count
  LOOP
    insert into tab_delete values (a,i);
  END LOOP;
END;
/
create or replace trigger trg after delete on tab_delete for each row
begin
  declare c int;
  begin
  if old.c1 = 1 then
    select count(*) into c from tab_delete where c1!=old.c1;
    SIGNAL SQLSTATE '45000' set table_name=c;
  end if;
  end;
end;
/
delimiter ;/
set @count=500;
call gendata(0,@count);
call gendata(1,50);
call gendata(2,20);
call gendata(3,20);
commit;

--echo #
--echo # Delete with limit (quick select - range acces)
--echo #

start transaction;
--enable_info
delete from tab_delete where (select count(*) from tab_delete b where b.c1=tab_delete.c1) = 500 limit 1;
delete from tab_delete where (select count(*) from tab_delete b where b.c1=tab_delete.c1) = 500 limit 1;
--disable_info
select count(*) from view_delete where c1=0;
rollback;

--echo #
--echo # Delete
--echo #

start transaction;
--enable_info
delete from tab_delete where (select count(*) from tab_delete b where b.c1=tab_delete.c1) = 500 ;
--disable_info
rollback;

--echo #
--echo # Delete with exists
--echo #

start transaction;
select count(*) from view_delete where c1=2;
--enable_info
delete from tab_delete where c1=2 and exists(select 'x' from tab_delete b where b.c2<10);
delete from tab_delete where c1=2 and exists(select 'x' from tab_delete b where b.c2<10);
--disable_info
select count(*) from view_delete where c1=2;
rollback;

--echo #
--echo # Delete throw a view with limit (range access)
--echo #

start transaction;
--echo # Acces by range (quick_select), initied = INDEX
--echo # +------+--------------------+------------+-------+---------------+---------------+---------+--------------------+------+-------------+
--echo # | id   | select_type        | table      | type  | possible_keys | key           | key_len | ref                | rows | Extra       |
--echo # +------+--------------------+------------+-------+---------------+---------------+---------+--------------------+------+-------------+
--echo # |    1 | PRIMARY            | tab_delete | range | tab_delete_c1 | tab_delete_c1 | 4       | NULL               |  550 | Using where |
--echo # |    2 | DEPENDENT SUBQUERY | b          | ref   | tab_delete_c1 | tab_delete_c1 | 4       | test.tab_delete.c1 |   73 | Using index |
--echo # +------+--------------------+------------+-------+---------------+---------------+---------+--------------------+------+-------------+
# explain delete from view_delete where (select count(*) from tab_delete b where b.c1=view_delete.c1) = 500 limit 1;
--enable_info
delete from view_delete where (select count(*) from tab_delete b where b.c1=view_delete.c1) = 500 limit 1;
delete from view_delete where (select count(*) from tab_delete b where b.c1=view_delete.c1) = 500 limit 1;
--disable_info
select count(*) from view_delete where c1=0;
rollback;

--echo #
--echo # Delete throw a view (ALL access)
--echo #

start transaction;
--echo # Acces by pointer, initied = RND
--echo # +------+--------------------+------------+------+---------------+---------------+---------+--------------------+------+-------------+
--echo # | id   | select_type        | table      | type | possible_keys | key           | key_len | ref                | rows | Extra       |
--echo # +------+--------------------+------------+------+---------------+---------------+---------+--------------------+------+-------------+
--echo # |    1 | PRIMARY            | tab_delete | ALL  | tab_delete_c1 | NULL          | NULL    | NULL               |  589 | Using where |
--echo # |    2 | DEPENDENT SUBQUERY | b          | ref  | tab_delete_c1 | tab_delete_c1 | 4       | test.tab_delete.c1 |  295 | Using index |
--echo # +------+--------------------+------------+------+---------------+---------------+---------+--------------------+------+-------------+
# explain delete from view_delete where (select count(*) from tab_delete b where b.c1=view_delete.c1) = 500;
--enable_info
delete from view_delete where (select count(*) from tab_delete b where b.c1=view_delete.c1) = 500 ;
--disable_info
select count(*) from view_delete where c1=0;
rollback;


--echo #
--echo # Delete failed due to trigger
--echo #

start transaction;
--enable_info
--error ER_SIGNAL_EXCEPTION
delete from tab_delete where c1=1 and (select count(*) from tab_delete b where b.c1=tab_delete.c1) > 0 order by c2 asc limit 10;
--disable_info
rollback;
start transaction;
--enable_info
--error ER_SIGNAL_EXCEPTION
delete from tab_delete where (select count(*) from tab_delete b where b.c1=tab_delete.c1) > 0 order by c1 desc limit 100;
--disable_info
select c1,count(*) from tab_delete group by c1;
rollback;

--echo #
--echo # Delete throw a view with returning
--echo #

start transaction;
delete from tab_delete where (select count(*) from tab_delete b where b.c1=tab_delete.c1) = 500 order by c2 asc limit 10 returning c1,c2;
rollback;
start transaction;
delete from tab_delete where (select count(*) from tab_delete b where b.c1=tab_delete.c1) = 500 order by c2 desc limit 10 returning c1,c2;
rollback;


--echo #
--echo # Delete from table with more than 150000 rows
--echo #
insert into tab_delete select * from tab_delete;
insert into tab_delete select * from tab_delete;
insert into tab_delete select * from tab_delete;
insert into tab_delete select * from tab_delete;
insert into tab_delete select * from tab_delete;
insert into tab_delete select * from tab_delete;
insert into tab_delete select * from tab_delete;
insert into tab_delete select * from tab_delete;
select count(*) from tab_delete;

--echo with high memory for sort_buffer_size
SET SESSION sort_buffer_size = 1024000;
start transaction;
--enable_info
delete from tab_delete where c1=0 and exists(select 'x' from tab_delete b where b.c1<10);
--disable_info
rollback;

--echo with few memory for sort_buffer_size
SET SESSION sort_buffer_size = 1024;
start transaction;
--enable_info
delete from tab_delete where c1=0 and exists(select 'x' from tab_delete b where b.c1<10);
--disable_info
rollback;

drop procedure if exists gendata;
drop view if exists view_delete;
drop table if exists tab_delete;