FLUSH TABLES;
CREATE TABLE t1 (a INT PRIMARY KEY, b TEXT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT PRIMARY KEY) ENGINE=InnoDB;
CREATE TABLE t3 (a INT PRIMARY KEY, b TEXT, c TEXT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1,REPEAT('a',30000)),(2,REPEAT('b',40000));
SET DEBUG_SYNC='before_row_upd_extern SIGNAL have_latch WAIT_FOR go1';
BEGIN;
UPDATE t1 SET a=a+2;
ROLLBACK;
BEGIN;
UPDATE t1 SET b=CONCAT(b,'foo');
connect  con1,localhost,root,,;
SET DEBUG_SYNC='now WAIT_FOR have_latch';
SELECT a, RIGHT(b,20) FROM t1;
connect  con2,localhost,root,,;
SET DEBUG_SYNC='now SIGNAL go1';
connection con1;
a	RIGHT(b,20)
1	aaaaaaaaaaaaaaaaaaaa
2	bbbbbbbbbbbbbbbbbbbb
connection default;
SET DEBUG='+d,row_ins_extern_checkpoint';
Warnings:
Warning	1287	'@@debug' is deprecated and will be removed in a future release. Please use '@@debug_dbug' instead
SET DEBUG_SYNC='before_row_ins_extern_latch SIGNAL rec_not_blob WAIT_FOR crash';
ROLLBACK;
BEGIN;
INSERT INTO t1 VALUES (3,REPEAT('c',50000));
connection con1;
SET DEBUG_SYNC='now WAIT_FOR rec_not_blob';
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SELECT @@transaction_isolation;
@@transaction_isolation
READ-UNCOMMITTED
SELECT a, RIGHT(b,20) FROM t1;
a	RIGHT(b,20)
1	aaaaaaaaaaaaaaaaaaaa
2	bbbbbbbbbbbbbbbbbbbb
SELECT a FROM t1;
a
1
2
3
BEGIN;
INSERT INTO t2 VALUES (42);
# restart
disconnect con1;
disconnect con2;
connection default;
ERROR HY000: Lost connection to server during query
CHECK TABLE t1;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
INSERT INTO t3 VALUES
(1,REPEAT('d',7000),REPEAT('e',100)),
(2,REPEAT('g',7000),REPEAT('h',100));
SET DEBUG_SYNC='blob_write_middle SIGNAL go_sel WAIT_FOR go_upd';
UPDATE t3 SET c=REPEAT('f',3000) WHERE a=1;
# Connection con1:
connect  con1,localhost,root,,;
SET DEBUG_SYNC='now WAIT_FOR go_sel';
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SELECT @@transaction_isolation;
@@transaction_isolation
READ-UNCOMMITTED
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
a	RIGHT(b,20)	RIGHT(c,20)
2	gggggggggggggggggggg	hhhhhhhhhhhhhhhhhhhh
set debug_sync='now SIGNAL go_upd';
# Connection default:
connection default;
# reap UPDATE t3 SET c=REPEAT('f',3000) WHERE a=1;
# Connection con1:
connection con1;
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
a	RIGHT(b,20)	RIGHT(c,20)
1	dddddddddddddddddddd	ffffffffffffffffffff
2	gggggggggggggggggggg	hhhhhhhhhhhhhhhhhhhh
disconnect con1;
connection default;
CHECK TABLE t1,t2,t3;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
test.t2	check	status	OK
test.t3	check	status	OK
connect  con2,localhost,root,,;
BEGIN;
INSERT INTO t2 VALUES (347);
connection default;
SET DEBUG='+d,row_upd_extern_checkpoint';
Warnings:
Warning	1287	'@@debug' is deprecated and will be removed in a future release. Please use '@@debug_dbug' instead
SET DEBUG_SYNC='before_row_upd_extern SIGNAL have_latch WAIT_FOR crash';
UPDATE t3 SET c=REPEAT('i',3000) WHERE a=2;
connection con2;
SET DEBUG_SYNC='now WAIT_FOR have_latch';
SELECT info FROM information_schema.processlist
WHERE state = 'debug sync point: before_row_upd_extern';
info
UPDATE t3 SET c=REPEAT('i',3000) WHERE a=2
connect  con3,localhost,root,,;
SET GLOBAL innodb_flush_log_at_trx_commit=1;
DELETE FROM t1;
ROLLBACK;
disconnect con3;
connection con2;
# restart
disconnect con2;
connection default;
ERROR HY000: Lost connection to server during query
CHECK TABLE t1,t2,t3;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
test.t2	check	status	OK
test.t3	check	status	OK
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
a	RIGHT(b,20)	RIGHT(c,20)
1	dddddddddddddddddddd	ffffffffffffffffffff
2	gggggggggggggggggggg	hhhhhhhhhhhhhhhhhhhh
SELECT a FROM t3;
a
1
2
connect  con2,localhost,root,,;
BEGIN;
INSERT INTO t2 VALUES (33101);
connection default;
SET DEBUG='+d,row_upd_extern_checkpoint';
Warnings:
Warning	1287	'@@debug' is deprecated and will be removed in a future release. Please use '@@debug_dbug' instead
SET DEBUG_SYNC='after_row_upd_extern SIGNAL have_latch WAIT_FOR crash';
UPDATE t3 SET c=REPEAT('j',3000) WHERE a=2;
connection con2;
SET DEBUG_SYNC='now WAIT_FOR have_latch';
SELECT info FROM information_schema.processlist
WHERE state = 'debug sync point: after_row_upd_extern';
info
UPDATE t3 SET c=REPEAT('j',3000) WHERE a=2
# restart
disconnect con2;
connection default;
ERROR HY000: Lost connection to server during query
CHECK TABLE t1,t2,t3;
Table	Op	Msg_type	Msg_text
test.t1	check	status	OK
test.t2	check	status	OK
test.t3	check	status	OK
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
a	RIGHT(b,20)	RIGHT(c,20)
1	dddddddddddddddddddd	ffffffffffffffffffff
2	gggggggggggggggggggg	hhhhhhhhhhhhhhhhhhhh
SELECT a FROM t3;
a
1
2
SELECT * FROM t2;
a
DROP TABLE t1,t2,t3;
CREATE TABLE t1(f1 INT PRIMARY KEY, f2 TEXT)ENGINE=InnoDB
ROW_FORMAT=REDUNDANT;
SET @fill_amount = (@@innodb_page_size / 2 ) + 1 ;
INSERT INTO t1 VALUES(1, REPEAT(2, @fill_amount));
UPDATE t1 SET f1 = 2;
DROP TABLE t1;