database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-12-24 11:21:21 +03:00
Code Activity

Bug#42643: InnoDB does not support replication of TRUNCATE TABLE

Browse Source 
The problem was that TRUNCATE TABLE didn't take a exclusive
lock on a table if it resorted to truncating via delete of
all rows in the table. Specifically for InnoDB tables, this
could break proper isolation as InnoDB ends up aborting some
granted locks when truncating a table.

The solution is to take a exclusive metadata lock before
TRUNCATE TABLE can proceed. This guarantees that no other
transaction is using the table.

Incompatible change: Truncate via delete no longer fails
if sql_safe_updates is activated (this was a undocumented
side effect).
This commit is contained in:
Davi Arnaut
2010-05-25 17:01:38 -03:00
parent a3c080be7a
commit 3c279d9a5a
38 changed files with 1471 additions and 441 deletions
Download Patch File Download Diff File Expand all files Collapse all files

340
mysql-test/suite/binlog/r/binlog_truncate_innodb.result
View File

@@ -1,3 +1,6 @@
SET @old_binlog_format=@@binlog_format;
SET BINLOG_FORMAT=ROW;
RESET MASTER;
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1),(2),(3);
@@ -9,6 +12,45 @@ Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t2
DROP TABLE t1,t2;
#
# Bug#42643: InnoDB does not support replication of TRUNCATE TABLE
#
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1),(2);
# Connection: default
BEGIN;
INSERT INTO t2 SELECT * FROM t1;
# Connection: truncate
TRUNCATE TABLE t1;
# Connection: default
INSERT INTO t2 SELECT * FROM t1;
SELECT COUNT(*) FROM t2;
COUNT(*)
4
COMMIT;
# Connection: truncate
# Reaping TRUNCATE TABLE
SELECT COUNT(*) FROM t1;
COUNT(*)
0
SELECT COUNT(*) FROM t2;
COUNT(*)
4
# Connection: default
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
DROP TABLE t1,t2;
# Even though the isolation level might be permissive, truncate
# table follows a stricter isolation as its locking is based on
# (exclusive) metadata locks.
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1),(2),(3);
@@ -22,6 +64,43 @@ Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t2
DROP TABLE t1,t2;
#
# Bug#42643: InnoDB does not support replication of TRUNCATE TABLE
#
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1),(2);
SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
# Connection: default
BEGIN;
INSERT INTO t2 SELECT * FROM t1;
# Connection: truncate
TRUNCATE TABLE t1;
# Connection: default
INSERT INTO t2 SELECT * FROM t1;
SELECT COUNT(*) FROM t2;
COUNT(*)
4
COMMIT;
# Connection: truncate
# Reaping TRUNCATE TABLE
SELECT COUNT(*) FROM t1;
COUNT(*)
0
SELECT COUNT(*) FROM t2;
COUNT(*)
4
# Connection: default
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
DROP TABLE t1,t2;
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1),(2),(3);
@@ -35,6 +114,43 @@ Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t2
DROP TABLE t1,t2;
#
# Bug#42643: InnoDB does not support replication of TRUNCATE TABLE
#
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1),(2);
SET TRANSACTION ISOLATION LEVEL READ COMMITTED;
# Connection: default
BEGIN;
INSERT INTO t2 SELECT * FROM t1;
# Connection: truncate
TRUNCATE TABLE t1;
# Connection: default
INSERT INTO t2 SELECT * FROM t1;
SELECT COUNT(*) FROM t2;
COUNT(*)
4
COMMIT;
# Connection: truncate
# Reaping TRUNCATE TABLE
SELECT COUNT(*) FROM t1;
COUNT(*)
0
SELECT COUNT(*) FROM t2;
COUNT(*)
4
# Connection: default
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
DROP TABLE t1,t2;
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1),(2),(3);
@@ -48,6 +164,43 @@ Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t2
DROP TABLE t1,t2;
#
# Bug#42643: InnoDB does not support replication of TRUNCATE TABLE
#
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1),(2);
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
# Connection: default
BEGIN;
INSERT INTO t2 SELECT * FROM t1;
# Connection: truncate
TRUNCATE TABLE t1;
# Connection: default
INSERT INTO t2 SELECT * FROM t1;
SELECT COUNT(*) FROM t2;
COUNT(*)
4
COMMIT;
# Connection: truncate
# Reaping TRUNCATE TABLE
SELECT COUNT(*) FROM t1;
COUNT(*)
0
SELECT COUNT(*) FROM t2;
COUNT(*)
4
# Connection: default
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
DROP TABLE t1,t2;
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1),(2),(3);
@@ -61,3 +214,190 @@ Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t2
DROP TABLE t1,t2;
#
# Bug#42643: InnoDB does not support replication of TRUNCATE TABLE
#
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1),(2);
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
# Connection: default
BEGIN;
INSERT INTO t2 SELECT * FROM t1;
# Connection: truncate
TRUNCATE TABLE t1;
# Connection: default
INSERT INTO t2 SELECT * FROM t1;
SELECT COUNT(*) FROM t2;
COUNT(*)
4
COMMIT;
# Connection: truncate
# Reaping TRUNCATE TABLE
SELECT COUNT(*) FROM t1;
COUNT(*)
0
SELECT COUNT(*) FROM t2;
COUNT(*)
4
# Connection: default
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
DROP TABLE t1,t2;
SET BINLOG_FORMAT=STATEMENT;
RESET MASTER;
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1),(2),(3);
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
**** Truncate of empty table shall be logged
TRUNCATE TABLE t1;
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
TRUNCATE TABLE t2;
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t2
DROP TABLE t1,t2;
#
# Bug#42643: InnoDB does not support replication of TRUNCATE TABLE
#
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1),(2);
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
# Connection: default
BEGIN;
INSERT INTO t2 SELECT * FROM t1;
# Connection: truncate
TRUNCATE TABLE t1;
# Connection: default
INSERT INTO t2 SELECT * FROM t1;
SELECT COUNT(*) FROM t2;
COUNT(*)
4
COMMIT;
# Connection: truncate
# Reaping TRUNCATE TABLE
SELECT COUNT(*) FROM t1;
COUNT(*)
0
SELECT COUNT(*) FROM t2;
COUNT(*)
4
# Connection: default
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Query # # use `test`; INSERT INTO t2 SELECT * FROM t1
master-bin.000001 # Query # # use `test`; INSERT INTO t2 SELECT * FROM t1
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
DROP TABLE t1,t2;
# Truncate is not supported for SBR if the isolation level is
# READ UNCOMMITTED or READ COMMITTED. These specific isolation
# levels are tested elsewhere.
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1),(2),(3);
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
**** Truncate of empty table shall be logged
TRUNCATE TABLE t1;
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
TRUNCATE TABLE t2;
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t2
DROP TABLE t1,t2;
#
# Bug#42643: InnoDB does not support replication of TRUNCATE TABLE
#
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1),(2);
SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
# Connection: default
BEGIN;
INSERT INTO t2 SELECT * FROM t1;
# Connection: truncate
TRUNCATE TABLE t1;
# Connection: default
INSERT INTO t2 SELECT * FROM t1;
SELECT COUNT(*) FROM t2;
COUNT(*)
4
COMMIT;
# Connection: truncate
# Reaping TRUNCATE TABLE
SELECT COUNT(*) FROM t1;
COUNT(*)
0
SELECT COUNT(*) FROM t2;
COUNT(*)
4
# Connection: default
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Query # # use `test`; INSERT INTO t2 SELECT * FROM t1
master-bin.000001 # Query # # use `test`; INSERT INTO t2 SELECT * FROM t1
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
DROP TABLE t1,t2;
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1),(2),(3);
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
**** Truncate of empty table shall be logged
TRUNCATE TABLE t1;
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
TRUNCATE TABLE t2;
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t2
DROP TABLE t1,t2;
#
# Bug#42643: InnoDB does not support replication of TRUNCATE TABLE
#
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
CREATE TABLE t2 (a INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1),(2);
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
# Connection: default
BEGIN;
INSERT INTO t2 SELECT * FROM t1;
# Connection: truncate
TRUNCATE TABLE t1;
# Connection: default
INSERT INTO t2 SELECT * FROM t1;
SELECT COUNT(*) FROM t2;
COUNT(*)
4
COMMIT;
# Connection: truncate
# Reaping TRUNCATE TABLE
SELECT COUNT(*) FROM t1;
COUNT(*)
0
SELECT COUNT(*) FROM t2;
COUNT(*)
4
# Connection: default
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Query # # use `test`; INSERT INTO t2 SELECT * FROM t1
master-bin.000001 # Query # # use `test`; INSERT INTO t2 SELECT * FROM t1
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
DROP TABLE t1,t2;
SET BINLOG_FORMAT=@old_binlog_format;

90
mysql-test/suite/binlog/r/binlog_truncate_myisam.result
View File

@@ -1,3 +1,5 @@
SET @old_binlog_format=@@binlog_format;
SET BINLOG_FORMAT=ROW;
RESET MASTER;
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
CREATE TABLE t2 (a INT) ENGINE=MyISAM;
@@ -10,3 +12,91 @@ Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t2
DROP TABLE t1,t2;
#
# Bug#42643: InnoDB does not support replication of TRUNCATE TABLE
#
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
CREATE TABLE t2 (a INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);
# Connection: default
BEGIN;
INSERT INTO t2 SELECT * FROM t1;
# Connection: truncate
TRUNCATE TABLE t1;
# Connection: default
INSERT INTO t2 SELECT * FROM t1;
SELECT COUNT(*) FROM t2;
COUNT(*)
4
COMMIT;
# Connection: truncate
# Reaping TRUNCATE TABLE
SELECT COUNT(*) FROM t1;
COUNT(*)
0
SELECT COUNT(*) FROM t2;
COUNT(*)
4
# Connection: default
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Query # # COMMIT
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t2)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Query # # COMMIT
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
DROP TABLE t1,t2;
SET BINLOG_FORMAT=STATEMENT;
RESET MASTER;
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
CREATE TABLE t2 (a INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (1),(2),(3);
**** Truncate of empty table shall be logged
TRUNCATE TABLE t1;
TRUNCATE TABLE t2;
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t2
DROP TABLE t1,t2;
#
# Bug#42643: InnoDB does not support replication of TRUNCATE TABLE
#
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
CREATE TABLE t2 (a INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);
# Connection: default
BEGIN;
INSERT INTO t2 SELECT * FROM t1;
# Connection: truncate
TRUNCATE TABLE t1;
# Connection: default
INSERT INTO t2 SELECT * FROM t1;
SELECT COUNT(*) FROM t2;
COUNT(*)
4
COMMIT;
# Connection: truncate
# Reaping TRUNCATE TABLE
SELECT COUNT(*) FROM t1;
COUNT(*)
0
SELECT COUNT(*) FROM t2;
COUNT(*)
4
# Connection: default
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Query # # use `test`; INSERT INTO t2 SELECT * FROM t1
master-bin.000001 # Query # # COMMIT
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Query # # use `test`; INSERT INTO t2 SELECT * FROM t1
master-bin.000001 # Query # # COMMIT
master-bin.000001 # Query # # use `test`; TRUNCATE TABLE t1
DROP TABLE t1,t2;
SET BINLOG_FORMAT=@old_binlog_format;

33
mysql-test/suite/binlog/t/binlog_truncate_innodb.test
View File

@@ -1,20 +1,18 @@
source include/have_log_bin.inc;
source include/have_innodb.inc;
# It is necessary to reset the master since otherwise the binlog test
# might show the wrong binary log. The default for SHOW BINLOG EVENTS
# is to show the first binary log, not the current one (which is
# actually a better idea).
let $engine = InnoDB;
SET @old_binlog_format=@@binlog_format;
SET BINLOG_FORMAT=ROW;
RESET MASTER;
let $engine = InnoDB;
source extra/binlog_tests/binlog_truncate.test;
# Under transaction isolation level READ UNCOMMITTED and READ
# COMMITTED, InnoDB does not permit statement-based replication of
# row-deleting statement. In these cases, TRUNCATE TABLE should still
# be replicated as a statement.
--echo # Even though the isolation level might be permissive, truncate
--echo # table follows a stricter isolation as its locking is based on
--echo # (exclusive) metadata locks.
let $before_truncate = SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;
source extra/binlog_tests/binlog_truncate.test;
@@ -27,3 +25,20 @@ source extra/binlog_tests/binlog_truncate.test;
let $before_truncate = SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
source extra/binlog_tests/binlog_truncate.test;
SET BINLOG_FORMAT=STATEMENT;
RESET MASTER;
source extra/binlog_tests/binlog_truncate.test;
--echo # Truncate is not supported for SBR if the isolation level is
--echo # READ UNCOMMITTED or READ COMMITTED. These specific isolation
--echo # levels are tested elsewhere.
let $before_truncate = SET TRANSACTION ISOLATION LEVEL REPEATABLE READ;
source extra/binlog_tests/binlog_truncate.test;
let $before_truncate = SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
source extra/binlog_tests/binlog_truncate.test;
SET BINLOG_FORMAT=@old_binlog_format;

18
mysql-test/suite/binlog/t/binlog_truncate_myisam.test
View File

@@ -1,11 +1,17 @@
source include/have_log_bin.inc;
# It is necessary to reset the master since otherwise the binlog test
# might show the wrong binary log. The default for SHOW BINLOG EVENTS
# is to show the first binary log, not the current one (which is
# actually a better idea).
RESET MASTER;
SET @old_binlog_format=@@binlog_format;
let $engine = MyISAM;
SET BINLOG_FORMAT=ROW;
RESET MASTER;
source extra/binlog_tests/binlog_truncate.test;
SET BINLOG_FORMAT=STATEMENT;
RESET MASTER;
source extra/binlog_tests/binlog_truncate.test;
SET BINLOG_FORMAT=@old_binlog_format;

1
mysql-test/suite/binlog/t/disabled.def
View File

@@ -9,6 +9,5 @@
# Do not use any TAB characters for whitespace.
#
##############################################################################
binlog_truncate_innodb : BUG#42643 2009-02-06 mats Changes to InnoDB requires to complete fix for BUG#36763
binlog_unsafe : BUG#50312 2010-01-13 lsoares Warnings for unsafe sub-statement not returned to client