drop table if exists t1;
create table t1 (time time, date date, timestamp timestamp,
quarter int, week int, year int, timestampadd int, timestampdiff int);
insert into t1 values ("12:22:22","97:02:03","1997-01-02",1,2,3,4,5);
select * from t1;
time	date	timestamp	quarter	week	year	timestampadd	timestampdiff
12:22:22	1997-02-03	1997-01-02 00:00:00	1	2	3	4	5
select t1.time+0,t1.date+0,t1.timestamp+0,concat(date," ",time),
t1.quarter+t1.week, t1.year+timestampadd,  timestampdiff from t1;
t1.time+0	t1.date+0	t1.timestamp+0	concat(date," ",time)	t1.quarter+t1.week	t1.year+timestampadd	timestampdiff
122222	19970203	19970102000000	1997-02-03 12:22:22	3	7	5
drop table t1;
create table events(binlog int);
insert into events values(1);
select events.binlog from events;
binlog
1
drop table events;
create procedure p1()
begin
declare n int default 2;
authors: while n > 0 do
set n = n -1;
end while authors;
end|
create procedure p2()
begin
declare n int default 2;
contributors: while n > 0 do
set n = n -1;
end while contributors;
end|
drop procedure p1;
drop procedure p2;
create table t1 (connection int, b int);
create procedure p1()
begin
declare connection int;
select max(t1.connection) into connection from t1;
select concat("max=",connection) 'p1';
end|
insert into t1 (connection) values (1);
call p1();
p1
max=1
drop procedure p1;
drop table t1;
CREATE TABLE slow (slow INT, general INT, master_heartbeat_period INT, ignore_server_ids INT);
INSERT INTO slow(slow, general, master_heartbeat_period, ignore_server_ids) VALUES (1,2,3,4), (5,6,7,8);
INSERT INTO slow(slow, general, master_heartbeat_period) VALUES (1,2,3), (5,6,7);
INSERT INTO slow(slow, general) VALUES (1,2), (5,6);
INSERT INTO slow(slow) VALUES (1), (5);
SELECT slow, general, master_heartbeat_period, ignore_server_ids FROM slow ORDER BY slow;
slow	general	master_heartbeat_period	ignore_server_ids
1	2	3	4
1	2	3	NULL
1	2	NULL	NULL
1	NULL	NULL	NULL
5	6	7	8
5	6	7	NULL
5	6	NULL	NULL
5	NULL	NULL	NULL
SELECT slow, general, master_heartbeat_period FROM slow ORDER BY slow;
slow	general	master_heartbeat_period
1	2	3
1	2	3
1	2	NULL
1	NULL	NULL
5	6	7
5	6	7
5	6	NULL
5	NULL	NULL
SELECT slow, master_heartbeat_period FROM slow ORDER BY slow;
slow	master_heartbeat_period
1	3
1	3
1	NULL
1	NULL
5	7
5	7
5	NULL
5	NULL
SELECT slow FROM slow ORDER BY slow;
slow
1
1
1
1
5
5
5
5
DROP TABLE slow;
CREATE TABLE general (slow INT, general INT, master_heartbeat_period INT, ignore_server_ids INT);
INSERT INTO general(slow, general, master_heartbeat_period, ignore_server_ids) VALUES (1,2,3,4), (5,6,7,8);
INSERT INTO general(slow, general, master_heartbeat_period) VALUES (1,2,3), (5,6,7);
INSERT INTO general(slow, general) VALUES (1,2), (5,6);
INSERT INTO general(slow) VALUES (1), (5);
SELECT slow, general, master_heartbeat_period, ignore_server_ids FROM general ORDER BY slow;
slow	general	master_heartbeat_period	ignore_server_ids
1	2	3	4
1	2	3	NULL
1	2	NULL	NULL
1	NULL	NULL	NULL
5	6	7	8
5	6	7	NULL
5	6	NULL	NULL
5	NULL	NULL	NULL
SELECT slow, general, master_heartbeat_period FROM general ORDER BY slow;
slow	general	master_heartbeat_period
1	2	3
1	2	3
1	2	NULL
1	NULL	NULL
5	6	7
5	6	7
5	6	NULL
5	NULL	NULL
SELECT slow, master_heartbeat_period FROM general ORDER BY slow;
slow	master_heartbeat_period
1	3
1	3
1	NULL
1	NULL
5	7
5	7
5	NULL
5	NULL
SELECT slow FROM general ORDER BY slow;
slow
1
1
1
1
5
5
5
5
DROP TABLE general;
CREATE TABLE master_heartbeat_period (slow INT, general INT, master_heartbeat_period INT, ignore_server_ids INT);
INSERT INTO master_heartbeat_period(slow, general, master_heartbeat_period, ignore_server_ids) VALUES (1,2,3,4), (5,6,7,8);
INSERT INTO master_heartbeat_period(slow, general, master_heartbeat_period) VALUES (1,2,3), (5,6,7);
INSERT INTO master_heartbeat_period(slow, general) VALUES (1,2), (5,6);
INSERT INTO master_heartbeat_period(slow) VALUES (1), (5);
SELECT slow, general, master_heartbeat_period, ignore_server_ids FROM master_heartbeat_period ORDER BY slow;
slow	general	master_heartbeat_period	ignore_server_ids
1	2	3	4
1	2	3	NULL
1	2	NULL	NULL
1	NULL	NULL	NULL
5	6	7	8
5	6	7	NULL
5	6	NULL	NULL
5	NULL	NULL	NULL
SELECT slow, general, master_heartbeat_period FROM master_heartbeat_period ORDER BY slow;
slow	general	master_heartbeat_period
1	2	3
1	2	3
1	2	NULL
1	NULL	NULL
5	6	7
5	6	7
5	6	NULL
5	NULL	NULL
SELECT slow, master_heartbeat_period FROM master_heartbeat_period ORDER BY slow;
slow	master_heartbeat_period
1	3
1	3
1	NULL
1	NULL
5	7
5	7
5	NULL
5	NULL
SELECT slow FROM master_heartbeat_period ORDER BY slow;
slow
1
1
1
1
5
5
5
5
DROP TABLE master_heartbeat_period;
CREATE TABLE ignore_server_ids (slow INT, general INT, master_heartbeat_period INT, ignore_server_ids INT);
INSERT INTO ignore_server_ids(slow, general, master_heartbeat_period, ignore_server_ids) VALUES (1,2,3,4), (5,6,7,8);
INSERT INTO ignore_server_ids(slow, general, master_heartbeat_period) VALUES (1,2,3), (5,6,7);
INSERT INTO ignore_server_ids(slow, general) VALUES (1,2), (5,6);
INSERT INTO ignore_server_ids(slow) VALUES (1), (5);
SELECT slow, general, master_heartbeat_period, ignore_server_ids FROM ignore_server_ids ORDER BY slow;
slow	general	master_heartbeat_period	ignore_server_ids
1	2	3	4
1	2	3	NULL
1	2	NULL	NULL
1	NULL	NULL	NULL
5	6	7	8
5	6	7	NULL
5	6	NULL	NULL
5	NULL	NULL	NULL
SELECT slow, general, master_heartbeat_period FROM ignore_server_ids ORDER BY slow;
slow	general	master_heartbeat_period
1	2	3
1	2	3
1	2	NULL
1	NULL	NULL
5	6	7
5	6	7
5	6	NULL
5	NULL	NULL
SELECT slow, master_heartbeat_period FROM ignore_server_ids ORDER BY slow;
slow	master_heartbeat_period
1	3
1	3
1	NULL
1	NULL
5	7
5	7
5	NULL
5	NULL
SELECT slow FROM ignore_server_ids ORDER BY slow;
slow
1
1
1
1
5
5
5
5
DROP TABLE ignore_server_ids;
CREATE TABLE t1 (slow INT, general INT, ignore_server_ids INT, master_heartbeat_period INT);
INSERT INTO t1 VALUES (1,2,3,4);
CREATE PROCEDURE p1()
BEGIN
DECLARE slow INT;
DECLARE general INT;
DECLARE ignore_server_ids INT;
DECLARE master_heartbeat_period INT;
SELECT max(t1.slow) INTO slow FROM t1;
SELECT max(t1.general) INTO general FROM t1;
SELECT max(t1.ignore_server_ids) INTO ignore_server_ids FROM t1;
SELECT max(t1.master_heartbeat_period) INTO master_heartbeat_period FROM t1;
SELECT slow, general, ignore_server_ids, master_heartbeat_period;
END|
CREATE PROCEDURE p2()
BEGIN
DECLARE n INT DEFAULT 2;
general: WHILE n > 0 DO 
SET n = n -1;
END WHILE general;
SET n = 2;
slow: WHILE n > 0 DO 
SET n = n -1;
END WHILE slow;
SET n = 2;
ignore_server_ids: WHILE n > 0 DO 
SET n = n -1;
END WHILE ignore_server_ids;
SET n = 2;
master_heartbeat_period: WHILE n > 0 DO 
SET n = n -1;
END WHILE master_heartbeat_period;
END|
CALL p1();
slow	general	ignore_server_ids	master_heartbeat_period
1	2	3	4
call p2();
DROP PROCEDURE p1;
DROP PROCEDURE p2;
DROP TABLE t1;
create table option (option int not null);
drop table option;
set option=1;
ERROR HY000: Unknown system variable 'option'
set option option=1;
ERROR HY000: Unknown system variable 'option'
