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drop table if exists t1, t2, t3;
create table t1 (kill_id int);
insert into t1 values(connection_id());
select ((@id := kill_id) - kill_id) from t1;
((@id := kill_id) - kill_id)
0
kill @id;
select ((@id := kill_id) - kill_id) from t1;
((@id := kill_id) - kill_id)
0
select @id != connection_id();
@id != connection_id()
1
select 4;
4
4
drop table t1;
kill (select count(*) from mysql.user);
ERROR 42000: This version of MySQL doesn't yet support 'Usage of subqueries or stored function calls as part of this statement'
create table t1 (id int primary key);
create table t2 (id int unsigned not null);
insert into t2 select id from t1;
create table t3 (kill_id int);
insert into t3 values(connection_id());
select id from t1 where id in (select distinct id from t2);
select ((@id := kill_id) - kill_id) from t3;
((@id := kill_id) - kill_id)
0
kill @id;
Got one of the listed errors
drop table t1, t2, t3;
select get_lock("a", 10);
get_lock("a", 10)
1
select get_lock("a", 10);
get_lock("a", 10)
NULL
select 1;
1
1
select RELEASE_LOCK("a");
RELEASE_LOCK("a")
1
create table t1(f1 int);
create function bug27563() returns int(11)
deterministic
begin
declare continue handler for sqlstate '70100' set @a:= 'killed';
declare continue handler for sqlexception set @a:= 'exception';
set @a= get_lock("lock27563", 10);
return 1;
end|
select get_lock("lock27563",10);
get_lock("lock27563",10)
1
insert into t1 values (bug27563());
ERROR 70100: Query execution was interrupted
select @a;
@a
NULL
select * from t1;
f1
insert into t1 values(0);
update t1 set f1= bug27563();
ERROR 70100: Query execution was interrupted
select @a;
@a
NULL
select * from t1;
f1
0
insert into t1 values(1);
delete from t1 where bug27563() is null;
ERROR 70100: Query execution was interrupted
select @a;
@a
NULL
select * from t1;
f1
0
1
select * from t1 where f1= bug27563();
ERROR 70100: Query execution was interrupted
select @a;
@a
NULL
create procedure proc27563()
begin
declare continue handler for sqlstate '70100' set @a:= 'killed';
declare continue handler for sqlexception set @a:= 'exception';
select get_lock("lock27563",10);
select "shouldn't be selected";
end|
call proc27563();
get_lock("lock27563",10)
NULL
ERROR 70100: Query execution was interrupted
select @a;
@a
NULL
create table t2 (f2 int);
create trigger trg27563 before insert on t1 for each row
begin
declare continue handler for sqlstate '70100' set @a:= 'killed';
declare continue handler for sqlexception set @a:= 'exception';
set @a:= get_lock("lock27563",10);
insert into t2 values(1);
end|
insert into t1 values(2),(3);
ERROR 70100: Query execution was interrupted
select @a;
@a
NULL
select * from t1;
f1
0
1
select * from t2;
f2
select release_lock("lock27563");
release_lock("lock27563")
1
drop table t1, t2;
drop function bug27563;
drop procedure proc27563;
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