set local sql_mode="";
set global sql_mode="";
SET DEBUG_SYNC = 'RESET';
DROP TABLE IF EXISTS t1, t2, t3;
DROP FUNCTION IF EXISTS MY_KILL;
CREATE FUNCTION MY_KILL(tid INT) RETURNS INT
BEGIN
DECLARE CONTINUE HANDLER FOR SQLEXCEPTION BEGIN END;
KILL tid;
RETURN (SELECT COUNT(*) = 0 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE ID = tid);
END|
connect  con1, localhost, root,,;
connect  con2, localhost, root,,;
connection con1;
connection con2;
connection con1;
SET DEBUG_SYNC= 'thread_end SIGNAL con1_end';
SET DEBUG_SYNC= 'before_do_command_net_read SIGNAL con1_read';
connection con2;
SET DEBUG_SYNC='now WAIT_FOR con1_read';
SET DEBUG_SYNC= 'now WAIT_FOR con1_end';
SET DEBUG_SYNC = 'RESET';
connection con1;
SELECT 1;
Got one of the listed errors
SELECT 1;
1
1
SELECT @id != CONNECTION_ID();
@id != CONNECTION_ID()
1
connection con2;
SELECT 4;
4
4
connection default;
KILL (SELECT COUNT(*) FROM mysql.user);
ERROR 42000: KILL does not support subqueries or stored functions
connection con1;
connection con2;
connection con1;
SET DEBUG_SYNC= 'thread_end SIGNAL con1_end';
SET DEBUG_SYNC= 'before_do_command_net_read SIGNAL con1_read WAIT_FOR kill';
connection con2;
SET DEBUG_SYNC= 'now WAIT_FOR con1_read';
SET DEBUG_SYNC= 'now WAIT_FOR con1_end';
SET DEBUG_SYNC = 'RESET';
connection con1;
SELECT 1;
Got one of the listed errors
SELECT 1;
1
1
SELECT @id != CONNECTION_ID();
@id != CONNECTION_ID()
1
connection con2;
SELECT 4;
4
4
connection default;
CREATE TABLE t1 (id INT PRIMARY KEY AUTO_INCREMENT);
CREATE TABLE t2 (id INT UNSIGNED NOT NULL);
INSERT INTO t1 VALUES
(0),(0),(0),(0),(0),(0),(0),(0), (0),(0),(0),(0),(0),(0),(0),(0),
(0),(0),(0),(0),(0),(0),(0),(0), (0),(0),(0),(0),(0),(0),(0),(0),
(0),(0),(0),(0),(0),(0),(0),(0), (0),(0),(0),(0),(0),(0),(0),(0),
(0),(0),(0),(0),(0),(0),(0),(0), (0),(0),(0),(0),(0),(0),(0),(0);
INSERT t1 SELECT 0 FROM t1 AS a1, t1 AS a2 LIMIT 4032;
INSERT INTO t2 SELECT id FROM t1;
connection con1;
connection con2;
connection con1;
SET DEBUG_SYNC= 'thread_end SIGNAL con1_end';
SET DEBUG_SYNC= 'before_acos_function SIGNAL in_sync';
SELECT id FROM t1 WHERE id IN
(SELECT DISTINCT a.id FROM t2 a, t2 b, t2 c, t2 d
GROUP BY ACOS(1/a.id), b.id, c.id, d.id
HAVING a.id BETWEEN 10 AND 20);
connection con2;
SET DEBUG_SYNC= 'now WAIT_FOR in_sync';
KILL @id;
SET DEBUG_SYNC= 'now WAIT_FOR con1_end';
connection con1;
Got one of the listed errors
SELECT 1;
1
1
connection default;
SET DEBUG_SYNC = 'RESET';
DROP TABLE t1, t2;
connection con1;
connection con2;
connection con1;
SET DEBUG_SYNC= 'before_acos_function SIGNAL in_sync WAIT_FOR kill';
SELECT ACOS(0);
connection con2;
SET DEBUG_SYNC= 'now WAIT_FOR in_sync';
KILL QUERY @id;
connection con1;
ACOS(0)
1.5707963267948966
SELECT 1;
1
1
SELECT @id = CONNECTION_ID();
@id = CONNECTION_ID()
1
connection default;
SET DEBUG_SYNC = 'RESET';
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 DEBUG_SYNC= 'now SIGNAL in_sync WAIT_FOR kill';
RETURN 1;
END|
connection con1;
connection con2;
connection con1;
INSERT INTO t1 VALUES (bug27563());
connection con2;
SET DEBUG_SYNC= 'now WAIT_FOR in_sync';
KILL QUERY @id;
connection con1;
ERROR 70100: Query execution was interrupted
SELECT * FROM t1;
f1
connection default;
SET DEBUG_SYNC = 'RESET';
INSERT INTO t1 VALUES(0);
connection con1;
UPDATE t1 SET f1= bug27563();
connection con2;
SET DEBUG_SYNC= 'now WAIT_FOR in_sync';
KILL QUERY @id;
connection con1;
ERROR 70100: Query execution was interrupted
SELECT * FROM t1;
f1
0
connection default;
SET DEBUG_SYNC = 'RESET';
INSERT INTO t1 VALUES(1);
connection con1;
DELETE FROM t1 WHERE bug27563() IS NULL;
connection con2;
SET DEBUG_SYNC= 'now WAIT_FOR in_sync';
KILL QUERY @id;
connection con1;
ERROR 70100: Query execution was interrupted
SELECT * FROM t1;
f1
0
1
connection default;
SET DEBUG_SYNC = 'RESET';
connection con1;
SELECT * FROM t1 WHERE f1= bug27563();
connection con2;
SET DEBUG_SYNC= 'now WAIT_FOR in_sync';
KILL QUERY @id;
connection con1;
ERROR 70100: Query execution was interrupted
SELECT * FROM t1;
f1
0
1
connection default;
SET DEBUG_SYNC = 'RESET';
DROP FUNCTION bug27563;
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';
INSERT INTO t2 VALUES(0);
SET DEBUG_SYNC= 'now SIGNAL in_sync WAIT_FOR kill';
INSERT INTO t2 VALUES(1);
END|
connection con1;
INSERT INTO t1 VALUES(2),(3);
connection con2;
SET DEBUG_SYNC= 'now WAIT_FOR in_sync';
KILL QUERY @id;
connection con1;
ERROR 70100: Query execution was interrupted
SELECT * FROM t1;
f1
0
1
SELECT * FROM t2;
f2
0
connection default;
SET DEBUG_SYNC = 'RESET';
DROP TABLE t1, t2;
connection con1;
connection con2;
connection con1;
SET SESSION optimizer_search_depth=0;
SET DEBUG_SYNC= 'before_join_optimize SIGNAL in_sync';
PREPARE stmt FROM 'EXPLAIN SELECT * FROM t1,t2,t3,t4,t5,t6,t7,t8,t9,t10,t11,t12,t13,t14,t15,t16,t17,t18,t19,t20,t21,t22,t23,t24,t25,t26,t27,t28,t29,t30,t31,t32,t33,t34,t35,t36,t37,t38,t39,t40 WHERE a1=a2 AND a2=a3 AND a3=a4 AND a4=a5 AND a5=a6 AND a6=a7 AND a7=a8 AND a8=a9 AND a9=a10 AND a10=a11 AND a11=a12 AND a12=a13 AND a13=a14 AND a14=a15 AND a15=a16 AND a16=a17 AND a17=a18 AND a18=a19 AND a19=a20 AND a20=a21 AND a21=a22 AND a22=a23 AND a23=a24 AND a24=a25 AND a25=a26 AND a26=a27 AND a27=a28 AND a28=a29 AND a29=a30 AND a30=a31 AND a31=a32 AND a32=a33 AND a33=a34 AND a34=a35 AND a35=a36 AND a36=a37 AND a37=a38 AND a38=a39 AND a39=a40  ';
EXECUTE stmt;
connection con2;
SET DEBUG_SYNC= 'now WAIT_FOR in_sync';
KILL QUERY @id;
connection con1;
ERROR 70100: Query execution was interrupted
connection default;
SET DEBUG_SYNC = 'RESET';
#
# Bug#19723: kill of active connection yields different error code
# depending on platform.
#
connection con1;
SET DEBUG_SYNC= 'thread_end SIGNAL con1_end';
KILL @id;
ERROR 70100: Connection was killed
connection con2;
SET DEBUG_SYNC= 'now WAIT_FOR con1_end';
connection con1;
# ER_SERVER_SHUTDOWN, CR_SERVER_GONE_ERROR, CR_SERVER_LOST,
# depending on the timing of close of the connection socket
SELECT 1;
Got one of the listed errors
SELECT 1;
1
1
SELECT @id != CONNECTION_ID();
@id != CONNECTION_ID()
1
connection default;
SET DEBUG_SYNC = 'RESET';
#
# Additional test for WL#3726 "DDL locking for all metadata objects"
# Check that DDL and DML statements waiting for metadata locks can
# be killed. Note that we don't cover all situations here since it
# can be tricky to write test case for some of them (e.g. REPAIR or
# ALTER and other statements under LOCK TABLES).
#
drop tables if exists t1, t2, t3;
create table t1 (i int primary key);
connect  blocker, localhost, root, , ;
connect  dml, localhost, root, , ;
connect  ddl, localhost, root, , ;
# Test for RENAME TABLE
connection blocker;
lock table t1 read;
connection ddl;
rename table t1 to t2;
connection default;
kill query ID;
connection ddl;
ERROR 70100: Query execution was interrupted
# Test for DROP TABLE
drop table t1;
connection default;
kill query ID;
connection ddl;
ERROR 70100: Query execution was interrupted
# Test for CREATE TRIGGER
create trigger t1_bi before insert on t1 for each row set @a:=1;
connection default;
kill query ID;
connection ddl;
ERROR 70100: Query execution was interrupted
#
# Tests for various kinds of ALTER TABLE
#
# Full-blown ALTER which should copy table
alter table t1 add column j int;
connection default;
kill query ID;
connection ddl;
ERROR 70100: Query execution was interrupted
# Two kinds of simple ALTER
alter table t1 rename to t2;
connection default;
kill query ID;
connection ddl;
ERROR 70100: Query execution was interrupted
alter table t1 disable keys;
connection default;
kill query ID;
connection ddl;
ERROR 70100: Query execution was interrupted
# Fast ALTER
alter table t1 alter column i set default 100;
connection default;
kill query ID;
connection ddl;
ERROR 70100: Query execution was interrupted
# Special case which is triggered only for MERGE tables.
connection blocker;
unlock tables;
create table t2 (i int primary key) engine=merge union=(t1);
lock tables t2 read;
connection ddl;
alter table t2 alter column i set default 100;
connection default;
kill query ID;
connection ddl;
ERROR 70100: Query execution was interrupted
# Test for DML waiting for meta-data lock
connection blocker;
unlock tables;
lock tables t1 read;
connection ddl;
truncate table t1;
connection dml;
insert into t1 values (1);
connection default;
kill query ID2;
connection dml;
ERROR 70100: Query execution was interrupted
connection blocker;
unlock tables;
connection ddl;
# Test for DML waiting for tables to be flushed
connection blocker;
lock tables t1 read;
connection ddl;
# Let us mark locked table t1 as old
flush tables;
connection dml;
select * from t1;
connection default;
kill query ID2;
connection dml;
ERROR 70100: Query execution was interrupted
connection blocker;
unlock tables;
connection ddl;
# Cleanup.
connection default;
drop table t1;
drop table t2;
#
# Test kill USER
#
grant ALL on test.* to test@localhost;
grant ALL on test.* to test2@localhost;
connect  con3, localhost, test,,;
connect  con4, localhost, test2,,;
connection default;
kill hard query user test2@nohost;
affected rows: 0
kill soft query user test@localhost;
affected rows: 1
kill hard query user test@localhost;
affected rows: 1
kill soft connection user test2;
affected rows: 1
kill hard connection user test@localhost;
affected rows: 1
revoke all privileges on test.* from test@localhost;
revoke all privileges on test.* from test2@localhost;
drop user test@localhost;
drop user test2@localhost;
connection con3;
select 1;
Got one of the listed errors
connection con4;
select 1;
Got one of the listed errors
connection default;
#
# MDEV-4911 - add KILL query id, and add query id information to
#             processlist
#
SELECT SLEEP(1000);
connection con1;
KILL QUERY ID @id;
connection default;
SLEEP(1000)
1
KILL QUERY ID 0;
ERROR HY000: Unknown query id: 0
#
# MDEV-5096 - Wrong error message on attempt to kill somebody else's
#             query ID
#
CREATE USER u1@localhost;
SELECT SLEEP(1000);
connection con1;
connect con5, localhost, u1,,;
KILL QUERY ID ID;
ERROR HY000: You are not owner of query ID
connection con1;
KILL QUERY ID @id;
connection default;
SLEEP(1000)
1
disconnect con5;
DROP USER u1@localhost;
SET DEBUG_SYNC = 'RESET';
DROP FUNCTION MY_KILL;
set global sql_mode=default;