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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 # DEBUG_SYNC must be compiled in. --source include/have_debug_sync.inc # Valgrind would complain about memory leaks when we crash on purpose. --source include/not_valgrind.inc # Embedded server does not support crashing --source include/not_embedded.inc # Avoid CrashReporter popup on Mac --source include/not_crashrep.inc call mtr.add_suppression("InnoDB: The log sequence numbers [0-9]+ and [0-9]+ in ibdata files do not match the log sequence number [0-9]+ in the ib_logfiles!"); 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 @@tx_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. SET DEBUG='+d,crash_commit_before'; # Write file to make mysql-test-run.pl restart the server --exec echo "restart" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect --error 2013 INSERT INTO t2 VALUES (42); 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 @@tx_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'; # Request a crash, and restart the server. SET DEBUG='+d,crash_commit_before'; # Write file to make mysql-test-run.pl restart the server --exec echo "restart" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect --error 2013 COMMIT; 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'; # Request a crash, and restart the server. SET DEBUG='+d,crash_commit_before'; # Write file to make mysql-test-run.pl restart the server --exec echo "restart" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect --error 2013 COMMIT; 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; --echo # --echo # Bug #29866408 SERVER CRASHES WHEN ADDING LONGTEXT COLUMN --echo # CREATE TABLE t1 ( id int(11) COLLATE utf8mb4_unicode_ci NOT NULL, data longtext COLLATE utf8mb4_unicode_ci NOT NULL, PRIMARY KEY (id), UNIQUE KEY unq_id (id) ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci; INSERT INTO t1 VALUES (1,''); SET @old_mode=@@sql_mode; SET GLOBAL SQL_MODE=""; let $num = 3; while($num) { connect (con1,localhost,root,,); connection con1; eval ALTER TABLE t1 ADD COLUMN d$num DATETIME NOT NULL; disconnect con1; dec $num; } connection default; SET GLOBAL SQL_MODE=@old_mode; DROP TABLE t1;