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# Bug#13721257 RACE CONDITION IN UPDATES OR INSERTS OF WIDE RECORDS
# Test what happens when a record is inserted or updated so that some
# columns are stored off-page.
--source include/have_innodb.inc
# The 7000 in this test is a bit less than half the innodb_page_size.
--source include/have_innodb_16k.inc
--source include/have_debug.inc
--source include/have_debug_sync.inc
# Embedded server does not support restarting
--source include/not_embedded.inc
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;
# This will not block, because it will not store new BLOBs.
UPDATE t1 SET a=a+2;
ROLLBACK;
BEGIN;
--send
UPDATE t1 SET b=CONCAT(b,'foo');
connect (con1,localhost,root,,);
SET DEBUG_SYNC='now WAIT_FOR have_latch';
# this one should block due to the clustered index tree and leaf page latches
--send
SELECT a, RIGHT(b,20) FROM t1;
connect (con2,localhost,root,,);
# Check that the above SELECT is blocked
let $wait_condition=
select count(*) = 1 from information_schema.processlist
where state in ('Sending data', 'Opening tables') and
info = 'SELECT a, RIGHT(b,20) FROM t1';
--source include/wait_condition.inc
SET DEBUG_SYNC='now SIGNAL go1';
connection con1;
reap;
connection default;
reap;
SET DEBUG='+d,row_ins_extern_checkpoint';
SET DEBUG_SYNC='before_row_ins_extern_latch SIGNAL rec_not_blob WAIT_FOR crash';
ROLLBACK;
BEGIN;
--send
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;
# this one should see (3,NULL_BLOB)
SELECT a, RIGHT(b,20) FROM t1;
SELECT a FROM t1;
# Request a crash, and restart the server.
BEGIN;
INSERT INTO t2 VALUES (42);
--let $shutdown_timeout=0
--source include/restart_mysqld.inc
disconnect con1;
disconnect con2;
connection default;
# This connection should notice the crash as well.
--error 2013
reap;
--enable_reconnect
--source include/wait_until_connected_again.inc
--disable_reconnect
CHECK TABLE t1;
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';
# This should move column b off-page.
--send
UPDATE t3 SET c=REPEAT('f',3000) WHERE a=1;
--echo # Connection con1:
connect (con1,localhost,root,,);
SET DEBUG_SYNC='now WAIT_FOR go_sel';
SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
SELECT @@transaction_isolation;
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
set debug_sync='now SIGNAL go_upd';
--echo # Connection default:
connection default;
--echo # reap UPDATE t3 SET c=REPEAT('f',3000) WHERE a=1;
reap;
--echo # Connection con1:
connection con1;
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
disconnect con1;
connection default;
CHECK TABLE t1,t2,t3;
connect (con2,localhost,root,,);
BEGIN;
INSERT INTO t2 VALUES (347);
connection default;
# The row_upd_extern_checkpoint was removed in Bug#13721257,
# because the mini-transaction of the B-tree modification would
# remain open while we are writing the off-page columns and are
# stuck in the DEBUG_SYNC. A checkpoint involves a flush, which
# would wait for the buffer-fix to cease.
SET DEBUG='+d,row_upd_extern_checkpoint';
SET DEBUG_SYNC='before_row_upd_extern SIGNAL have_latch WAIT_FOR crash';
# This should move column b off-page.
--send
UPDATE t3 SET c=REPEAT('i',3000) WHERE a=2;
connection con2;
SET DEBUG_SYNC='now WAIT_FOR have_latch';
# Check that the above UPDATE is blocked
SELECT info FROM information_schema.processlist
WHERE state = 'debug sync point: before_row_upd_extern';
connect (con3,localhost,root,,);
SET GLOBAL innodb_flush_log_at_trx_commit=1;
DELETE FROM t1;
ROLLBACK;
disconnect con3;
connection con2;
--let $shutdown_timeout=0
--source include/restart_mysqld.inc
disconnect con2;
connection default;
# This connection should notice the crash as well.
--error 2013
reap;
--enable_reconnect
--source include/wait_until_connected_again.inc
--disable_reconnect
CHECK TABLE t1,t2,t3;
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
SELECT a FROM t3;
connect (con2,localhost,root,,);
BEGIN;
INSERT INTO t2 VALUES (33101);
connection default;
# The row_upd_extern_checkpoint was removed in Bug#13721257,
# because the mini-transaction of the B-tree modification would
# remain open while we are writing the off-page columns and are
# stuck in the DEBUG_SYNC. A checkpoint involves a flush, which
# would wait for the buffer-fix to cease.
SET DEBUG='+d,row_upd_extern_checkpoint';
SET DEBUG_SYNC='after_row_upd_extern SIGNAL have_latch WAIT_FOR crash';
# This should move column b off-page.
--send
UPDATE t3 SET c=REPEAT('j',3000) WHERE a=2;
connection con2;
SET DEBUG_SYNC='now WAIT_FOR have_latch';
# Check that the above UPDATE is blocked
SELECT info FROM information_schema.processlist
WHERE state = 'debug sync point: after_row_upd_extern';
--let $shutdown_timeout=0
--source include/restart_mysqld.inc
disconnect con2;
connection default;
# This connection should notice the crash as well.
--error 2013
reap;
--enable_reconnect
--source include/wait_until_connected_again.inc
--disable_reconnect
CHECK TABLE t1,t2,t3;
SELECT a, RIGHT(b,20), RIGHT(c,20) FROM t3;
SELECT a FROM t3;
SELECT * FROM t2;
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;
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