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Backport of revno ## 2617.31.1, 2617.31.3, 2617.31.4, 2617.31.5,

Browse Source 
2617.31.12, 2617.31.15, 2617.31.15, 2617.31.16, 2617.43.1
- initial changeset that introduced the fix for 
Bug#989 and follow up fixes for all test suite failures
introduced in the initial changeset. 
------------------------------------------------------------
revno: 2617.31.1
committer: Davi Arnaut <Davi.Arnaut@Sun.COM>
branch nick: 4284-6.0
timestamp: Fri 2009-03-06 19:17:00 -0300
message:
Bug#989: If DROP TABLE while there's an active transaction, wrong binlog order
WL#4284: Transactional DDL locking

Currently the MySQL server does not keep metadata locks on
schema objects for the duration of a transaction, thus failing
to guarantee the integrity of the schema objects being used
during the transaction and to protect then from concurrent
DDL operations. This also poses a problem for replication as
a DDL operation might be replicated even thought there are
active transactions using the object being modified.

The solution is to defer the release of metadata locks until
a active transaction is either committed or rolled back. This
prevents other statements from modifying the table for the
entire duration of the transaction. This provides commitment
ordering for guaranteeing serializability across multiple
transactions.

- Incompatible change:

If MySQL's metadata locking system encounters a lock conflict,
the usual schema is to use the try and back-off technique to
avoid deadlocks -- this schema consists in releasing all locks
and trying to acquire them all in one go.

But in a transactional context this algorithm can't be utilized
as its not possible to release locks acquired during the course
of the transaction without breaking the transaction commitments.
To avoid deadlocks in this case, the ER_LOCK_DEADLOCK will be
returned if a lock conflict is encountered during a transaction.

Let's consider an example:

A transaction has two statements that modify table t1, then table
t2, and then commits. The first statement of the transaction will
acquire a shared metadata lock on table t1, and it will be kept
utill COMMIT to ensure serializability.

At the moment when the second statement attempts to acquire a
shared metadata lock on t2, a concurrent ALTER or DROP statement
might have locked t2 exclusively. The prescription of the current
locking protocol is that the acquirer of the shared lock backs off
-- gives up all his current locks and retries. This implies that
the entire multi-statement transaction has to be rolled back.

- Incompatible change:

FLUSH commands such as FLUSH PRIVILEGES and FLUSH TABLES WITH READ
LOCK won't cause locked tables to be implicitly unlocked anymore.


mysql-test/extra/binlog_tests/drop_table.test:
  Add test case for Bug#989.
mysql-test/extra/binlog_tests/mix_innodb_myisam_binlog.test:
  Fix test case to reflect the fact that transactions now hold
  metadata locks for the duration of a transaction.
mysql-test/include/mix1.inc:
  Fix test case to reflect the fact that transactions now hold
  metadata locks for the duration of a transaction.
mysql-test/include/mix2.inc:
  Fix test case to reflect the fact that transactions now hold
  metadata locks for the duration of a transaction.
mysql-test/r/flush_block_commit.result:
  Update test case result (WL#4284).
mysql-test/r/flush_block_commit_notembedded.result:
  Update test case result (WL#4284).
mysql-test/r/innodb.result:
  Update test case result (WL#4284).
mysql-test/r/innodb_mysql.result:
  Update test case result (WL#4284).
mysql-test/r/lock.result:
  Add test case result for an effect of WL#4284/Bug#989
  (all locks should be released when a connection terminates).
mysql-test/r/mix2_myisam.result:
  Update test case result (effects of WL#4284/Bug#989).
mysql-test/r/not_embedded_server.result:
  Update test case result (effects of WL#4284/Bug#989).
  Add a test case for interaction of WL#4284 and FLUSH PRIVILEGES.
mysql-test/r/partition_innodb_semi_consistent.result:
  Update test case result (effects of WL#4284/Bug#989).
mysql-test/r/partition_sync.result:
  Temporarily disable the test case for Bug#43867,
  which will be fixed by a subsequent backport.
mysql-test/r/ps.result:
  Add a test case for effect of PREPARE on transactional
  locks: we take a savepoint at beginning of PREAPRE
  and release it at the end. Thus PREPARE does not 
  accumulate metadata locks (Bug#989/WL#4284).
mysql-test/r/read_only_innodb.result:
  Update test case result (effects of WL#4284/Bug#989).
mysql-test/suite/binlog/r/binlog_row_drop_tbl.result:
  Add a test case result (WL#4284/Bug#989).
mysql-test/suite/binlog/r/binlog_row_mix_innodb_myisam.result:
  Update test case result (effects of WL#4284/Bug#989).
mysql-test/suite/binlog/r/binlog_stm_drop_tbl.result:
  Add a test case result (WL#4284/Bug#989).
mysql-test/suite/binlog/r/binlog_stm_mix_innodb_myisam.result:
  Update test case result (effects of WL#4284/Bug#989).
mysql-test/suite/binlog/r/binlog_unsafe.result:
  A side effect of Bug#989 -- slightly different table map ids.
mysql-test/suite/binlog/t/binlog_row_drop_tbl.test:
  Add a test case for WL#4284/Bug#989.
mysql-test/suite/binlog/t/binlog_stm_drop_tbl.test:
  Add a test case for WL#4284/Bug#989.
mysql-test/suite/binlog/t/binlog_stm_row.test:
  Update to the new state name. This
  is actually a follow up to another patch for WL#4284, 
  that changes Locked thread state to Table lock.
mysql-test/suite/ndb/r/ndb_index_ordered.result:
  Remove result for disabled part of the test case.
mysql-test/suite/ndb/t/disabled.def:
  Temporarily disable a test case (Bug#45621).
mysql-test/suite/ndb/t/ndb_index_ordered.test:
  Disable a part of a test case (needs update to
  reflect semantics of Bug#989).
mysql-test/suite/rpl/t/disabled.def:
  Disable tests made meaningless by transactional metadata
  locking.
mysql-test/suite/sys_vars/r/autocommit_func.result:
  Add a commit (Bug#989).
mysql-test/suite/sys_vars/t/autocommit_func.test:
  Add a commit (Bug#989).
mysql-test/t/flush_block_commit.test:
  Fix test case to reflect the fact that transactions now hold
  metadata locks for the duration of a transaction.
mysql-test/t/flush_block_commit_notembedded.test:
  Fix test case to reflect the fact that transactions now hold
  metadata locks for the duration of a transaction.
  Add a test case for transaction-scope locks and the global
  read lock (Bug#989/WL#4284).
mysql-test/t/innodb.test:
  Fix test case to reflect the fact that transactions now hold
  metadata locks for the duration of a transaction
  (effects of Bug#989/WL#4284).
mysql-test/t/lock.test:
  Add a test case for Bug#989/WL#4284.
mysql-test/t/not_embedded_server.test:
  Add a test case for Bug#989/WL#4284.
mysql-test/t/partition_innodb_semi_consistent.test:
  Replace TRUNCATE with DELETE, to not issue
  an implicit commit of a transaction, and not depend
  on metadata locks.
mysql-test/t/partition_sync.test:
  Temporarily disable the test case for Bug#43867,
  which needs a fix to be backported from 6.0.
mysql-test/t/ps.test:
  Add a test case for semantics of PREPARE and transaction-scope
  locks: metadata locks on tables used in PREPARE are enclosed into a
  temporary savepoint, taken at the beginning of PREPARE,
  and released at the end. Thus PREPARE does not effect
  what locks a transaction owns.
mysql-test/t/read_only_innodb.test:
  Fix test case to reflect the fact that transactions now hold
  metadata locks for the duration of a transaction 
  (Bug#989/WL#4284).
  
  Wait for the read_only statement to actually flush tables before
  sending other concurrent statements that depend on its state.
mysql-test/t/xa.test:
  Fix test case to reflect the fact that transactions now hold
  metadata locks for the duration of a transaction 
  (Bug#989/WL#4284).
sql/ha_ndbcluster_binlog.cc:
  Backport bits of changes of ha_ndbcluster_binlog.cc
  from 6.0, to fix the failing binlog test suite with
  WL#4284. WL#4284 implementation does not work
  with 5.1 implementation of ndbcluster binlog index.
sql/log_event.cc:
  Release metadata locks after issuing a commit.
sql/mdl.cc:
  Style changes (WL#4284).
sql/mysql_priv.h:
  Rename parameter to match the name used in the definition (WL#4284).
sql/rpl_injector.cc:
  Release metadata locks on commit (WL#4284).
sql/rpl_rli.cc:
  Remove assert made meaningless, metadata locks are released
  at the end of the transaction.
sql/set_var.cc:
  Close tables and release locks if autocommit mode is set.
sql/slave.cc:
  Release metadata locks after a rollback.
sql/sql_acl.cc:
  Don't implicitly unlock locked tables. Issue a implicit commit
  at the end and unlock tables.
sql/sql_base.cc:
  Defer the release of metadata locks when closing tables
  if not required to.
  Issue a deadlock error if the locking protocol requires
  that a transaction re-acquire its locks.
  
  Release metadata locks when closing tables for reopen.
sql/sql_class.cc:
  Release metadata locks if the thread is killed.
sql/sql_parse.cc:
  Release metadata locks after implicitly committing a active
  transaction, or after explicit commits or rollbacks.
sql/sql_plugin.cc:
  
  Allocate MDL request on the stack as the use of the table
  is contained within the function. It will be removed from
  the context once close_thread_tables is called at the end
  of the function.
sql/sql_prepare.cc:
  The problem is that the prepare phase of the CREATE TABLE
  statement takes a exclusive metadata lock lock and this can
  cause a self-deadlock the thread already holds a shared lock
  on the table being that should be created.
  
  The solution is to make the prepare phase take a shared
  metadata lock when preparing a CREATE TABLE statement. The
  execution of the statement will still acquire a exclusive
  lock, but won't cause any problem as it issues a implicit
  commit.
  
  After some discussions with stakeholders it has been decided that
  metadata locks acquired during a PREPARE statement must be released
  once the statement is prepared even if it is prepared within a multi
  statement transaction.
sql/sql_servers.cc:
  Don't implicitly unlock locked tables. Issue a implicit commit
  at the end and unlock tables.
sql/sql_table.cc:
  Close table and release metadata locks after a admin operation.
sql/table.h:
  The problem is that the prepare phase of the CREATE TABLE
  statement takes a exclusive metadata lock lock and this can
  cause a self-deadlock the thread already holds a shared lock
  on the table being that should be created.
  
  The solution is to make the prepare phase take a shared
  metadata lock when preparing a CREATE TABLE statement. The
  execution of the statement will still acquire a exclusive
  lock, but won't cause any problem as it issues a implicit
  commit.
sql/transaction.cc:
  Release metadata locks after the implicitly committed due
  to a new transaction being started. Also, release metadata
  locks acquired after a savepoint if the transaction is rolled
  back to the save point.
  
  The problem is that in some cases transaction-long metadata locks
  could be released before the transaction was committed. This could
  happen when a active transaction was ended by a "START TRANSACTION"
  or "BEGIN" statement, in which case the metadata locks would be
  released before the actual commit of the active transaction.
  
  The solution is to defer the release of metadata locks to after the
  transaction has been implicitly committed. No test case is provided
  as the effort to provide one is too disproportional to the size of
  the fix.
This commit is contained in:
Konstantin Osipov 2009-12-05 02:02:48 +03:00
parent 191bb81241
commit a14bbee5ab
59 changed files with 671 additions and 262 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
mysql-test/extra/binlog_tests/drop_table.test Normal file
View File

@ -0,0 +1,34 @@
#
# Bug#989: If DROP TABLE while there's an active transaction, wrong binlog order
#
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
connect (con1,localhost,root,,);
connect (con2,localhost,root,,);
connection con1;
RESET MASTER;
CREATE TABLE t1 (a INT);
SET AUTOCOMMIT=OFF;
BEGIN;
INSERT INTO t1 VALUES(1);
connection con2;
--send DROP TABLE t1;
connection con1;
COMMIT;
connection con2;
--reap
connection default;
--disconnect con1
--disconnect con2
let $VERSION=`select version()`;
source include/show_binlog_events.inc;

4
mysql-test/extra/binlog_tests/mix_innodb_myisam_binlog.test
View File

@ -204,6 +204,10 @@ select (@after:=unix_timestamp())*0; # always give repeatable output
# the bug, the reap would return immediately after the insert into t2.
select (@after-@before) >= 2;
connection con3;
commit;
connection con2;
drop table t1,t2;
commit;

1
mysql-test/include/mix1.inc
View File

@ -1392,6 +1392,7 @@ SELECT * FROM t1;
connection con2;
--reap
SELECT * FROM t1;
COMMIT;
--echo # Switch to connection con1
connection con1;

2
mysql-test/include/mix2.inc
View File

@ -1994,6 +1994,7 @@ commit;
connection b;
set autocommit = 0;
update t1 set b = 5 where a = 2;
commit;
connection a;
delimiter |;
create trigger t1t before insert on t1 for each row begin set NEW.b = NEW.a * 10 + 5, NEW.c = NEW.a / 10; end |
@ -2056,6 +2057,7 @@ update t2 set b = b + 5 where a = 1;
update t3 set b = b + 5 where a = 1;
update t4 set b = b + 5 where a = 1;
insert into t5(a) values(20);
commit;
connection b;
set autocommit = 0;
insert into t1(a) values(7);

18
mysql-test/r/flush_block_commit.result
View File

@ -1,3 +1,4 @@
# Save the initial number of concurrent sessions
# Establish connection con1 (user=root)
# Establish connection con2 (user=root)
# Establish connection con3 (user=root)
@ -8,13 +9,15 @@ BEGIN;
INSERT INTO t1 VALUES(1);
# Switch to connection con2
FLUSH TABLES WITH READ LOCK;
SELECT * FROM t1;
a
# Switch to connection con1
# Sending:
COMMIT;
# Switch to connection con2
# Wait until COMMIT gets blocked.
# Verify that 'con1' was blocked and data did not move.
SELECT * FROM t1;
a
1
UNLOCK TABLES;
# Switch to connection con1
# Switch to connection con1
@ -32,6 +35,7 @@ COMMIT;
# Switch to connection con2
a
1
COMMIT;
# Switch to connection con3
UNLOCK TABLES;
# Switch to connection con2
@ -40,8 +44,6 @@ COMMIT;
BEGIN;
INSERT INTO t1 VALUES(10);
FLUSH TABLES WITH READ LOCK;
COMMIT;
UNLOCK TABLES;
# Switch to connection con2
FLUSH TABLES WITH READ LOCK;
UNLOCK TABLES;
@ -53,5 +55,11 @@ a
SHOW CREATE DATABASE test;
Database Create Database
test CREATE DATABASE `test` /*!40100 DEFAULT CHARACTER SET latin1 */
DROP TABLE t1;
COMMIT;
# Cleanup
# Switch to connection default and close connections con1, con2, con3
# We commit open transactions when we disconnect: only then we can
# drop the table.
DROP TABLE t1;
# End of 4.1 tests
# Wait till all disconnects are completed

15
mysql-test/r/flush_block_commit_notembedded.result
View File

@ -1,17 +1,20 @@
# Save the initial number of concurrent sessions
# Establish connection con1 (user=root)
# Establish connection con2 (user=root)
# Switch to connection con1
CREATE TABLE t1 (a INT) ENGINE=innodb;
RESET MASTER;
SET AUTOCOMMIT=0;
INSERT t1 VALUES (1);
SELECT 1;
1
1
# Switch to connection con2
FLUSH TABLES WITH READ LOCK;
SHOW MASTER STATUS;
File Position Binlog_Do_DB Binlog_Ignore_DB
master-bin.000001 107
# Switch to connection con1
COMMIT;
INSERT INTO t1 VALUES (1);
# Switch to connection con2
SHOW MASTER STATUS;
File Position Binlog_Do_DB Binlog_Ignore_DB
@ -20,4 +23,12 @@ UNLOCK TABLES;
# Switch to connection con1
DROP TABLE t1;
SET AUTOCOMMIT=1;
create table t1 (a int) engine=innodb;
flush tables with read lock;
begin;
insert into t1 values (1);;
unlock tables;
commit;
drop table t1;
# Switch to connection default and close connections con1 and con2
# Wait till all disconnects are completed

3
mysql-test/r/innodb.result
View File

@ -2836,10 +2836,10 @@ t2 CREATE TABLE `t2` (
DROP TABLE t2,t1;
create table t1(a int not null, b int, c int, d int, primary key(a)) engine=innodb;
insert into t1(a) values (1),(2),(3);
create trigger t1t before insert on t1 for each row begin set NEW.b = NEW.a * 10 + 5, NEW.c = NEW.a / 10; end |
commit;
set autocommit = 0;
update t1 set b = 5 where a = 2;
create trigger t1t before insert on t1 for each row begin set NEW.b = NEW.a * 10 + 5, NEW.c = NEW.a / 10; end |
set autocommit = 0;
insert into t1(a) values (10),(20),(30),(40),(50),(60),(70),(80),(90),(100),
(11),(21),(31),(41),(51),(61),(71),(81),(91),(101),
@ -2887,6 +2887,7 @@ insert into t2(a) values(8);
delete from t2 where a = 3;
update t4 set b = b + 1 where a = 3;
commit;
commit;
drop trigger t1t;
drop trigger t2t;
drop trigger t3t;

1
mysql-test/r/innodb_mysql.result
View File

@ -1618,6 +1618,7 @@ a b
SELECT * FROM t1;
a b
1 init+con1+con2
COMMIT;
# Switch to connection con1
# 3. test for updated key column:
TRUNCATE t1;

22
mysql-test/r/lock.result
View File

@ -1,4 +1,4 @@
drop table if exists t1,t2;
drop table if exists t1,t2,t3;
CREATE TABLE t1 ( `id` int(11) NOT NULL default '0', `id2` int(11) NOT NULL default '0', `id3` int(11) NOT NULL default '0', `dummy1` char(30) default NULL, PRIMARY KEY (`id`,`id2`), KEY `index_id3` (`id3`)) ENGINE=MyISAM;
insert into t1 (id,id2) values (1,1),(1,2),(1,3);
LOCK TABLE t1 WRITE;
@ -262,5 +262,25 @@ unlock tables;
drop table t1;
drop view v1;
#
# WL#4284: Transactional DDL locking
#
drop table if exists t1;
create table t1 (a int);
set autocommit= 0;
insert into t1 values (1);
lock table t1 write;
# Disconnect
# Ensure that metadata locks will be released if there is an open
# transaction (autocommit=off) in conjunction with lock tables.
drop table t1;
# Same problem but now for BEGIN
drop table if exists t1;
create table t1 (a int);
begin;
insert into t1 values (1);
# Disconnect
# Ensure that metadata locks held by the transaction are released.
drop table t1;
#
# End of 6.0 tests.
#

2
mysql-test/r/mix2_myisam.result
View File

@ -2063,6 +2063,7 @@ insert into t1(a) values (1),(2),(3);
commit;
set autocommit = 0;
update t1 set b = 5 where a = 2;
commit;
create trigger t1t before insert on t1 for each row begin set NEW.b = NEW.a * 10 + 5, NEW.c = NEW.a / 10; end |
set autocommit = 0;
insert into t1(a) values (10),(20),(30),(40),(50),(60),(70),(80),(90),(100),
@ -2105,6 +2106,7 @@ update t2 set b = b + 5 where a = 1;
update t3 set b = b + 5 where a = 1;
update t4 set b = b + 5 where a = 1;
insert into t5(a) values(20);
commit;
set autocommit = 0;
insert into t1(a) values(7);
insert into t2(a) values(8);

16
mysql-test/r/not_embedded_server.result
View File

@ -1,6 +1,16 @@
select 1;
1
1
call mtr.add_suppression("Can't open and lock privilege tables: Table 'host' was not locked with LOCK TABLES");
SHOW VARIABLES like 'slave_skip_errors';
Variable_name Value
slave_skip_errors OFF
#
# WL#4284: Transactional DDL locking
#
# FLUSH PRIVILEGES should not implicitly unlock locked tables.
#
drop table if exists t1;
create table t1 (c1 int);
lock tables t1 read;
flush privileges;
ERROR HY000: Table 'host' was not locked with LOCK TABLES
unlock tables;
drop table t1;

2
mysql-test/r/partition_innodb_semi_consistent.result
View File

@ -102,7 +102,7 @@ a b
# Switch to connection con1
# 3. test for updated key column:
TRUNCATE t1;
TRUNCATE t2;
DELETE FROM t2;
INSERT INTO t1 VALUES (1,'init');
BEGIN;
UPDATE t1 SET a = 2, b = CONCAT(b, '+con1') WHERE a = 1;

27
mysql-test/r/partition_sync.result
View File

@ -1,25 +1,2 @@
#
# Bug #43867 ALTER TABLE on a partitioned table
# causes unnecessary deadlocks
#
CREATE TABLE t1 (a int) PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (1),
PARTITION p1 VALUES LESS THAN (2));
INSERT INTO t1 VALUES (0),(1);
# Connection 2
BEGIN;
SELECT * FROM t1;
a
0
1
# Connection 1
ALTER TABLE t1 DROP PARTITION p3;
ERROR HY000: Error in list of partitions to DROP
# Connection 2
# This failed with deadlock and should not do so.
SELECT * FROM t1;
a
0
1
# Connection 1
DROP TABLE t1;
# Disabled until Bug#46654 False deadlock on concurrent DML/DDL
# with partitions, inconsistent behavior is backported

28
mysql-test/r/ps.result
View File

@ -3086,5 +3086,29 @@ DROP PROCEDURE p1;
DROP PROCEDURE p2;
# End of WL#4435.
End of 6.0 tests.
#
# WL#4284: Transactional DDL locking
#
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a INT);
BEGIN;
SELECT * FROM t1;
a
# Test that preparing a CREATE TABLE does not take a exclusive metdata lock.
PREPARE stmt1 FROM "CREATE TABLE t1 AS SELECT 1";
EXECUTE stmt1;
ERROR 42S01: Table 't1' already exists
DEALLOCATE PREPARE stmt1;
DROP TABLE t1;
#
# WL#4284: Transactional DDL locking
#
# Test that metadata locks taken during prepare are released.
#
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (a INT);
BEGIN;
PREPARE stmt1 FROM "SELECT * FROM t1";
DROP TABLE t1;
#
# End of 6.0 tests.

6
mysql-test/r/read_only_innodb.result
View File

@ -7,12 +7,10 @@ insert into table_11733 values(11733);
set global read_only=1;
select @@global.read_only;
@@global.read_only
1
0
select * from table_11733 ;
a
11733
ERROR 40001: Deadlock found when trying to get lock; try restarting transaction
COMMIT;
ERROR HY000: The MySQL server is running with the --read-only option so it cannot execute this statement
set global read_only=0;
drop table table_11733 ;
drop user test@localhost;

16
mysql-test/suite/binlog/r/binlog_row_drop_tbl.result Normal file
View File

@ -0,0 +1,16 @@
DROP TABLE IF EXISTS t1;
RESET MASTER;
CREATE TABLE t1 (a INT);
SET AUTOCOMMIT=OFF;
BEGIN;
INSERT INTO t1 VALUES(1);
DROP TABLE t1;;
COMMIT;
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; CREATE TABLE t1 (a INT)
master-bin.000001 # Query # # BEGIN
master-bin.000001 # Table_map # # table_id: # (test.t1)
master-bin.000001 # Write_rows # # table_id: # flags: STMT_END_F
master-bin.000001 # Query # # COMMIT
master-bin.000001 # Query # # use `test`; DROP TABLE t1

1
mysql-test/suite/binlog/r/binlog_row_mix_innodb_myisam.result
View File

@ -238,6 +238,7 @@ select (@after:=unix_timestamp())*0;
select (@after-@before) >= 2;
(@after-@before) >= 2
1
commit;
drop table t1,t2;
commit;
begin;

13
mysql-test/suite/binlog/r/binlog_stm_drop_tbl.result Normal file
View File

@ -0,0 +1,13 @@
DROP TABLE IF EXISTS t1;
RESET MASTER;
CREATE TABLE t1 (a INT);
SET AUTOCOMMIT=OFF;
BEGIN;
INSERT INTO t1 VALUES(1);
DROP TABLE t1;;
COMMIT;
show binlog events from <binlog_start>;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Query # # use `test`; CREATE TABLE t1 (a INT)
master-bin.000001 # Query # # use `test`; INSERT INTO t1 VALUES(1)
master-bin.000001 # Query # # use `test`; DROP TABLE t1

1
mysql-test/suite/binlog/r/binlog_stm_mix_innodb_myisam.result
View File

@ -207,6 +207,7 @@ select (@after:=unix_timestamp())*0;
select (@after-@before) >= 2;
(@after-@before) >= 2
1
commit;
drop table t1,t2;
commit;
begin;

20
mysql-test/suite/binlog/r/binlog_unsafe.result
View File

@ -320,10 +320,10 @@ INSERT INTO t2 SET a = func_modify_t1();
SHOW BINLOG EVENTS FROM 12283;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 12283 Query 1 12351 BEGIN
master-bin.000001 12351 Table_map 1 12393 table_id: 44 (test.t2)
master-bin.000001 12393 Table_map 1 12435 table_id: 45 (test.t1)
master-bin.000001 12435 Write_rows 1 12473 table_id: 45
master-bin.000001 12473 Write_rows 1 12511 table_id: 44 flags: STMT_END_F
master-bin.000001 12351 Table_map 1 12393 table_id: 41 (test.t2)
master-bin.000001 12393 Table_map 1 12435 table_id: 42 (test.t1)
master-bin.000001 12435 Write_rows 1 12473 table_id: 42
master-bin.000001 12473 Write_rows 1 12511 table_id: 41 flags: STMT_END_F
master-bin.000001 12511 Query 1 12580 COMMIT
DROP TABLE t1,t2;
DROP FUNCTION func_modify_t1;
@ -347,12 +347,12 @@ INSERT INTO t1 SET a = 2;
SHOW BINLOG EVENTS FROM 13426;
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 13426 Query 1 13494 BEGIN
master-bin.000001 13494 Table_map 1 13535 table_id: 47 (test.t1)
master-bin.000001 13535 Table_map 1 13577 table_id: 48 (test.t3)
master-bin.000001 13577 Table_map 1 13619 table_id: 49 (test.t2)
master-bin.000001 13619 Write_rows 1 13657 table_id: 49
master-bin.000001 13657 Write_rows 1 13695 table_id: 48
master-bin.000001 13695 Write_rows 1 13729 table_id: 47 flags: STMT_END_F
master-bin.000001 13494 Table_map 1 13535 table_id: 44 (test.t1)
master-bin.000001 13535 Table_map 1 13577 table_id: 45 (test.t3)
master-bin.000001 13577 Table_map 1 13619 table_id: 46 (test.t2)
master-bin.000001 13619 Write_rows 1 13657 table_id: 46
master-bin.000001 13657 Write_rows 1 13695 table_id: 45
master-bin.000001 13695 Write_rows 1 13729 table_id: 44 flags: STMT_END_F
master-bin.000001 13729 Query 1 13798 COMMIT
DROP TABLE t1,t2,t3;
"End of tests"

5
mysql-test/suite/binlog/t/binlog_row_drop_tbl.test Normal file
View File

@ -0,0 +1,5 @@
# This is a wrapper for drop_table.test so that the same test case can be used
# For both statement and row based bin logs
-- source include/have_binlog_format_row.inc
-- source extra/binlog_tests/drop_table.test

5
mysql-test/suite/binlog/t/binlog_stm_drop_tbl.test Normal file
View File

@ -0,0 +1,5 @@
# This is a wrapper for drop_table.test so that the same test case can be used
# For both statement and row based bin logs
-- source include/have_binlog_format_mixed_or_statement.inc
-- source extra/binlog_tests/drop_table.test

2
mysql-test/suite/binlog/t/binlog_stm_row.test
View File

@ -57,7 +57,7 @@ let $wait_condition=
--echo # con1
let $wait_condition=
SELECT COUNT(*) = 1 FROM information_schema.processlist WHERE
state = "Locked" and info = "INSERT INTO t2 VALUES (3)";
state = "Table lock" and info = "INSERT INTO t2 VALUES (3)";
--source include/wait_condition.inc
SELECT RELEASE_LOCK('Bug#34306');
--connection con2

15
mysql-test/suite/ndb/r/ndb_index_ordered.result
View File

@ -637,21 +637,6 @@ select count(*)- 4 from t1 use index (v) where v > 0000965.00042;
count(*)- 4
0
drop table t1;
create table t1(a int primary key, b int not null, index(b));
insert into t1 values (1,1), (2,2);
set autocommit=0;
begin;
select count(*) from t1;
count(*)
2
ALTER TABLE t1 ADD COLUMN c int;
select a from t1 where b = 2;
a
2
show tables;
Tables_in_test
t1
drop table t1;
create table t1 (a int, c varchar(10),
primary key using hash (a), index(c)) engine=ndb;
insert into t1 (a, c) values (1,'aaa'),(3,'bbb');

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

@ -13,3 +13,4 @@
ndb_partition_error2 : Bug#40989 ndb_partition_error2 needs maintenance
# the below testcase have been reworked to avoid the bug, test contains comment, keep bug open
ndb_alter_table3 : Bug#45621 2009-06-10 alik A few test files are disabled due to WL#4284

36
mysql-test/suite/ndb/t/ndb_index_ordered.test
View File

@ -333,21 +333,29 @@ select count(*)- 4 from t1 use index (v) where v > 0000965.00042;
drop table t1;
#
# Disabled due to WL#4284
#
# Needs to be reworked. It's not possible anymore to do a non-fast alter table
# on a table that is being used by a pending transaction (transaction holds a
# metadata lock on the table).
#
# bug#7798
create table t1(a int primary key, b int not null, index(b));
insert into t1 values (1,1), (2,2);
connect (con1,localhost,root,,test);
connect (con2,localhost,root,,test);
connection con1;
set autocommit=0;
begin;
select count(*) from t1;
connection con2;
ALTER TABLE t1 ADD COLUMN c int;
connection con1;
select a from t1 where b = 2;
show tables;
drop table t1;
# create table t1(a int primary key, b int not null, c int, index(b));
# insert into t1 values (1,1,1), (2,2,2);
# connect (con1,localhost,root,,test);
# connect (con2,localhost,root,,test);
# connection con1;
# set autocommit=0;
# begin;
# select count(*) from t1;
# connection con2;
# ALTER TABLE t1 ADD COLUMN c int
# connection con1;
# select a from t1 where b = 2;
# show tables;
# drop table t1;
#
# mysqld 5.0.13 crash, no bug#
create table t1 (a int, c varchar(10),

2
mysql-test/suite/rpl/t/disabled.def
View File

@ -12,3 +12,5 @@
rpl_cross_version : BUG#43913 2009-10-22 luis rpl_cross_version fails with symptom in described in bug report
rpl_spec_variables : BUG#47661 2009-10-27 jasonh rpl_spec_variables fails on PB2 hpux
rpl_failed_optimize : WL#4284: Can't optimize table used by a pending transaction (there is metadata lock on the table).
rpl_read_only : WL#4284: Setting Read only won't succeed until all metadata locks are released.

2
mysql-test/suite/sys_vars/r/autocommit_func.result
View File

@ -104,6 +104,8 @@ id name
2 Record_2
4 Record_4
5 Record_5
## Commit changes
COMMIT;
## Dropping table t1 ##
DROP table t1;
## Disconnecting both connections ##

4
mysql-test/suite/sys_vars/t/autocommit_func.test
View File

@ -153,6 +153,10 @@ SELECT * from t1;
CONNECTION test_con2;
SELECT * from t1;
--echo ## Commit changes
CONNECTION test_con1;
COMMIT;
--echo ## Dropping table t1 ##
DROP table t1;

36
mysql-test/t/flush_block_commit.test
View File

@ -6,7 +6,7 @@
# And it requires InnoDB
--source include/have_innodb.inc
# Save the initial number of concurrent sessions
--echo # Save the initial number of concurrent sessions
--source include/count_sessions.inc
--echo # Establish connection con1 (user=root)
@ -29,19 +29,26 @@ BEGIN;
INSERT INTO t1 VALUES(1);
--echo # Switch to connection con2
connection con2;
FLUSH TABLES WITH READ LOCK;
SELECT * FROM t1;
--send FLUSH TABLES WITH READ LOCK
--echo # Switch to connection con1
connection con1;
send COMMIT; # blocked by con2
sleep 1;
--echo # Sending:
COMMIT;
--echo # Switch to connection con2
connection con2;
SELECT * FROM t1; # verify con1 was blocked and data did not move
--reap
--echo # Wait until COMMIT gets blocked.
#let $wait_condition=
# select count(*) = 1 from information_schema.processlist
# where state = "Waiting for release of readlock" and info = "COMMIT";
#--source include/wait_condition.inc
--echo # Verify that 'con1' was blocked and data did not move.
SELECT * FROM t1;
UNLOCK TABLES;
--echo # Switch to connection con1
connection con1;
reap;
#--echo # Reaping COMMIT
#--reap
# No deadlock ?
@ -63,6 +70,7 @@ COMMIT; # should not be blocked by con3
--echo # Switch to connection con2
connection con2;
reap;
COMMIT;
--echo # Switch to connection con3
connection con3;
reap;
@ -79,8 +87,6 @@ connection con1;
BEGIN;
INSERT INTO t1 VALUES(10);
FLUSH TABLES WITH READ LOCK;
COMMIT;
UNLOCK TABLES;
--echo # Switch to connection con2
connection con2;
FLUSH TABLES WITH READ LOCK; # bug caused hang here
@ -91,19 +97,21 @@ UNLOCK TABLES;
BEGIN;
SELECT * FROM t1;
SHOW CREATE DATABASE test;
DROP TABLE t1;
COMMIT;
# Cleanup
--echo # Cleanup
--echo # Switch to connection default and close connections con1, con2, con3
connection default;
disconnect con1;
disconnect con2;
disconnect con3;
# End of 4.1 tests
--echo # We commit open transactions when we disconnect: only then we can
--echo # drop the table.
DROP TABLE t1;
--echo # End of 4.1 tests
# Wait till all disconnects are completed
--echo # Wait till all disconnects are completed
--source include/wait_until_count_sessions.inc

27
mysql-test/t/flush_block_commit_notembedded.test
View File

@ -9,7 +9,7 @@
--source include/have_log_bin.inc
--source include/have_innodb.inc
# Save the initial number of concurrent sessions
--echo # Save the initial number of concurrent sessions
--source include/count_sessions.inc
@ -24,14 +24,14 @@ connection con1;
CREATE TABLE t1 (a INT) ENGINE=innodb;
RESET MASTER;
SET AUTOCOMMIT=0;
INSERT t1 VALUES (1);
SELECT 1;
--echo # Switch to connection con2
connection con2;
FLUSH TABLES WITH READ LOCK;
SHOW MASTER STATUS;
--echo # Switch to connection con1
connection con1;
send COMMIT;
send INSERT INTO t1 VALUES (1);
--echo # Switch to connection con2
connection con2;
sleep 1;
@ -43,11 +43,30 @@ reap;
DROP TABLE t1;
SET AUTOCOMMIT=1;
# GLR blocks new transactions
create table t1 (a int) engine=innodb;
connection con1;
flush tables with read lock;
connection con2;
begin;
--send insert into t1 values (1);
connection con1;
let $wait_condition=
select count(*) = 1 from information_schema.processlist
where state = "Waiting for release of readlock" and
info = "insert into t1 values (1)";
--source include/wait_condition.inc
unlock tables;
connection con2;
--reap
commit;
drop table t1;
--echo # Switch to connection default and close connections con1 and con2
connection default;
disconnect con1;
disconnect con2;
# Wait till all disconnects are completed
--echo # Wait till all disconnects are completed
--source include/wait_until_count_sessions.inc

10
mysql-test/t/innodb.test
View File

@ -1849,16 +1849,15 @@ connect (b,localhost,root,,);
connection a;
create table t1(a int not null, b int, c int, d int, primary key(a)) engine=innodb;
insert into t1(a) values (1),(2),(3);
delimiter |;
create trigger t1t before insert on t1 for each row begin set NEW.b = NEW.a * 10 + 5, NEW.c = NEW.a / 10; end |
delimiter ;|
commit;
connection b;
set autocommit = 0;
update t1 set b = 5 where a = 2;
connection a;
delimiter |;
create trigger t1t before insert on t1 for each row begin set NEW.b = NEW.a * 10 + 5, NEW.c = NEW.a / 10; end |
delimiter ;|
set autocommit = 0;
connection a;
insert into t1(a) values (10),(20),(30),(40),(50),(60),(70),(80),(90),(100),
(11),(21),(31),(41),(51),(61),(71),(81),(91),(101),
(12),(22),(32),(42),(52),(62),(72),(82),(92),(102),
@ -1922,6 +1921,9 @@ insert into t2(a) values(8);
delete from t2 where a = 3;
update t4 set b = b + 1 where a = 3;
commit;
connection a;
commit;
connection b;
drop trigger t1t;
drop trigger t2t;
drop trigger t3t;

37
mysql-test/t/lock.test
View File

@ -3,7 +3,7 @@
#
--disable_warnings
drop table if exists t1,t2;
drop table if exists t1,t2,t3;
--enable_warnings
CREATE TABLE t1 ( `id` int(11) NOT NULL default '0', `id2` int(11) NOT NULL default '0', `id3` int(11) NOT NULL default '0', `dummy1` char(30) default NULL, PRIMARY KEY (`id`,`id2`), KEY `index_id3` (`id3`)) ENGINE=MyISAM;
insert into t1 (id,id2) values (1,1),(1,2),(1,3);
@ -310,6 +310,41 @@ unlock tables;
drop table t1;
drop view v1;
--echo #
--echo # WL#4284: Transactional DDL locking
--echo #
--disable_warnings
drop table if exists t1;
--enable_warnings
create table t1 (a int);
connect(con1,localhost,root,,);
set autocommit= 0;
insert into t1 values (1);
lock table t1 write;
--echo # Disconnect
--echo # Ensure that metadata locks will be released if there is an open
--echo # transaction (autocommit=off) in conjunction with lock tables.
disconnect con1;
connection default;
drop table t1;
--echo # Same problem but now for BEGIN
--disable_warnings
drop table if exists t1;
--enable_warnings
create table t1 (a int);
connect(con1,localhost,root,,);
begin;
insert into t1 values (1);
--echo # Disconnect
--echo # Ensure that metadata locks held by the transaction are released.
disconnect con1;
connection default;
drop table t1;
--echo #
--echo # End of 6.0 tests.
--echo #

23
mysql-test/t/not_embedded_server.test
View File

@ -4,12 +4,6 @@
-- source include/not_embedded.inc
#
# Produce output
#
select 1;
# The following fails sporadically because 'check-testcase' runs
# queries before this test and there is no way to guarantee that any
# previous process finishes. The purpose of the test is not clearly
@ -36,6 +30,8 @@ select 1;
#execute stmt1;
#deallocate prepare stmt1;
call mtr.add_suppression("Can't open and lock privilege tables: Table 'host' was not locked with LOCK TABLES");
#
# Bug#43835: SHOW VARIABLES does not include 0 for slave_skip_errors
#
@ -43,3 +39,18 @@ select 1;
SHOW VARIABLES like 'slave_skip_errors';
# End of 5.1 tests
--echo #
--echo # WL#4284: Transactional DDL locking
--echo #
--echo # FLUSH PRIVILEGES should not implicitly unlock locked tables.
--echo #
--disable_warnings
drop table if exists t1;
--enable_warnings
create table t1 (c1 int);
lock tables t1 read;
--error ER_TABLE_NOT_LOCKED
flush privileges;
unlock tables;
drop table t1;

2
mysql-test/t/partition_innodb_semi_consistent.test
View File

@ -157,7 +157,7 @@ connection con1;
--echo # 3. test for updated key column:
TRUNCATE t1;
TRUNCATE t2;
DELETE FROM t2;
INSERT INTO t1 VALUES (1,'init');

65
mysql-test/t/partition_sync.test
View File

@ -2,38 +2,41 @@
# Save the initial number of concurrent sessions.
--source include/count_sessions.inc
--echo #
--echo # Bug #43867 ALTER TABLE on a partitioned table
--echo # causes unnecessary deadlocks
--echo #
--echo # Disabled until Bug#46654 False deadlock on concurrent DML/DDL
--echo # with partitions, inconsistent behavior is backported
CREATE TABLE t1 (a int) PARTITION BY RANGE (a)
(PARTITION p0 VALUES LESS THAN (1),
PARTITION p1 VALUES LESS THAN (2));
INSERT INTO t1 VALUES (0),(1);
connect(con1,localhost,root);
--echo # Connection 2
connection con1;
BEGIN;
SELECT * FROM t1;
--echo # Connection 1
connection default;
--error ER_DROP_PARTITION_NON_EXISTENT
ALTER TABLE t1 DROP PARTITION p3;
--echo # Connection 2
connection con1;
--echo # This failed with deadlock and should not do so.
SELECT * FROM t1;
--echo # Connection 1
connection default;
disconnect con1;
DROP TABLE t1;
#--echo #
#--echo # Bug #43867 ALTER TABLE on a partitioned table
#--echo # causes unnecessary deadlocks
#--echo #
#
#CREATE TABLE t1 (a int) PARTITION BY RANGE (a)
#(PARTITION p0 VALUES LESS THAN (1),
# PARTITION p1 VALUES LESS THAN (2));
#
#INSERT INTO t1 VALUES (0),(1);
#
#connect(con1,localhost,root);
#
#--echo # Connection 2
#connection con1;
#BEGIN;
#SELECT * FROM t1;
#
#--echo # Connection 1
#connection default;
#--error ER_DROP_PARTITION_NON_EXISTENT
#ALTER TABLE t1 DROP PARTITION p3;
#
#--echo # Connection 2
#connection con1;
#--echo # This failed with deadlock and should not do so.
#SELECT * FROM t1;
#
#--echo # Connection 1
#connection default;
#disconnect con1;
#DROP TABLE t1;
# Check that all connections opened by test cases in this file are really

41
mysql-test/t/ps.test
View File

@ -3211,7 +3211,44 @@ DROP PROCEDURE p2;
###########################################################################
--echo
--echo End of 6.0 tests.
--echo #
--echo # WL#4284: Transactional DDL locking
--echo #
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
CREATE TABLE t1 (a INT);
BEGIN;
SELECT * FROM t1;
--echo # Test that preparing a CREATE TABLE does not take a exclusive metdata lock.
PREPARE stmt1 FROM "CREATE TABLE t1 AS SELECT 1";
--error ER_TABLE_EXISTS_ERROR
EXECUTE stmt1;
DEALLOCATE PREPARE stmt1;
DROP TABLE t1;
--echo #
--echo # WL#4284: Transactional DDL locking
--echo #
--echo # Test that metadata locks taken during prepare are released.
--echo #
connect(con1,localhost,root,,);
connection default;
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
CREATE TABLE t1 (a INT);
connection con1;
BEGIN;
PREPARE stmt1 FROM "SELECT * FROM t1";
connection default;
DROP TABLE t1;
disconnect con1;
--echo #
--echo # End of 6.0 tests.
###########################################################################

14
mysql-test/t/read_only_innodb.test
View File

@ -16,6 +16,8 @@ DROP TABLE IF EXISTS table_11733 ;
grant CREATE, SELECT, DROP on *.* to test@localhost;
connect (con1,localhost,test,,test);
connect (con2,localhost,root,,);
connection default;
set global read_only=0;
@ -28,15 +30,22 @@ BEGIN;
insert into table_11733 values(11733);
connection default;
set global read_only=1;
send set global read_only=1;
connection con2;
let $wait_condition=
select count(*) = 1 from information_schema.processlist
where state = "Flushing tables" and info = "set global read_only=1";
--source include/wait_condition.inc
connection con1;
select @@global.read_only;
--error ER_LOCK_DEADLOCK
select * from table_11733 ;
-- error ER_OPTION_PREVENTS_STATEMENT
COMMIT;
connection default;
reap;
set global read_only=0;
drop table table_11733 ;
drop user test@localhost;
@ -81,5 +90,6 @@ DROP TABLE t1;
DROP USER test@localhost;
disconnect con1;
disconnect con2;
--echo echo End of 5.1 tests

3
mysql-test/t/xa.test
View File

@ -76,9 +76,10 @@ xa rollback 'testa','testb';
xa start 'zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz';
select * from t1;
drop table t1;
disconnect con1;
connection default;
drop table t1;
#
# Bug#28323: Server crashed in xid cache operations

37
sql/ha_ndbcluster_binlog.cc
View File

@ -2347,7 +2347,7 @@ static int open_ndb_binlog_index(THD *thd, TABLE **ndb_binlog_index)
tables->required_type= FRMTYPE_TABLE;
uint counter;
thd->clear_error();
if (open_tables(thd, &tables, &counter, MYSQL_LOCK_IGNORE_FLUSH))
if (simple_open_n_lock_tables(thd, tables))
{
if (thd->killed)
sql_print_error("NDB Binlog: Opening ndb_binlog_index: killed");
@ -2381,28 +2381,11 @@ int ndb_add_ndb_binlog_index(THD *thd, void *_row)
ulong saved_options= thd->options;
thd->options&= ~(OPTION_BIN_LOG);
for ( ; ; ) /* loop for need_reopen */
if (!ndb_binlog_index && open_ndb_binlog_index(thd, &ndb_binlog_index))
{
if (!ndb_binlog_index && open_ndb_binlog_index(thd, &ndb_binlog_index))
{
error= -1;
goto add_ndb_binlog_index_err;
}
if (lock_tables(thd, &binlog_tables, 1, 0, &need_reopen))
{
if (need_reopen)
{
TABLE_LIST *p_binlog_tables= &binlog_tables;
close_tables_for_reopen(thd, &p_binlog_tables, FALSE);
ndb_binlog_index= 0;
continue;
}
sql_print_error("NDB Binlog: Unable to lock table ndb_binlog_index");
error= -1;
goto add_ndb_binlog_index_err;
}
break;
sql_print_error("NDB Binlog: Unable to lock table ndb_binlog_index");
error= -1;
goto add_ndb_binlog_index_err;
}
/*
@ -2428,13 +2411,6 @@ int ndb_add_ndb_binlog_index(THD *thd, void *_row)
}
if (! thd->locked_tables_mode) /* Is always TRUE */
{
mysql_unlock_tables(thd, thd->lock);
thd->lock= 0;
}
thd->options= saved_options;
return 0;
add_ndb_binlog_index_err:
close_thread_tables(thd);
ndb_binlog_index= 0;
@ -3905,9 +3881,6 @@ restart:
{
static char db[]= "";
thd->db= db;
if (ndb_binlog_running)
open_ndb_binlog_index(thd, &ndb_binlog_index);
thd->db= db;
}
do_ndbcluster_binlog_close_connection= BCCC_running;
for ( ; !((ndbcluster_binlog_terminating ||

9
sql/log_event.cc
View File

@ -5314,10 +5314,17 @@ void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info)
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Xid_log_event::do_apply_event(Relay_log_info const *rli)
{
bool res;
/* For a slave Xid_log_event is COMMIT */
general_log_print(thd, COM_QUERY,
"COMMIT /* implicit, from Xid_log_event */");
return trans_commit(thd);
if (!(res= trans_commit(thd)))
{
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
}
return res;
}
Log_event::enum_skip_reason

6
sql/mdl.cc
View File

@ -491,7 +491,7 @@ void MDL_ticket::destroy(MDL_ticket *ticket)
@sa THD::enter_cond()/exit_cond()/killed.
@note We can't use THD::enter_cond()/exit_cond()/killed directly here
since this will make metadata subsystem dependant on THD class
since this will make metadata subsystem dependent on THD class
and thus prevent us from writing unit tests for it. And usage of
wrapper functions to access THD::killed/enter_cond()/exit_cond()
will probably introduce too much overhead.
@ -881,6 +881,7 @@ static bool notify_shared_lock(THD *thd, MDL_ticket *conflicting_ticket)
if (conflicting_ticket->is_shared())
{
THD *conflicting_thd= conflicting_ticket->get_ctx()->get_thd();
DBUG_ASSERT(thd != conflicting_thd); /* Self-deadlock */
woke= mysql_notify_thread_having_shared_lock(thd, conflicting_thd);
}
return woke;
@ -1089,7 +1090,6 @@ MDL_ticket::upgrade_shared_lock_to_exclusive()
old_msg= MDL_ENTER_COND(thd, mysys_var);
/*
Since we should have already acquired an intention exclusive
global lock this call is only enforcing asserts.
@ -1164,7 +1164,7 @@ MDL_ticket::upgrade_shared_lock_to_exclusive()
@param conflict [out] Indicates that conflicting lock exists
@retval TRUE Failure either conflicting lock exists or some error
occured (probably OOM).
occurred (probably OOM).
@retval FALSE Success, lock was acquired.
FIXME: Compared to lock_table_name_if_not_cached()

2
sql/mysql_priv.h
View File

@ -827,7 +827,7 @@ extern my_decimal decimal_zero;
void free_items(Item *item);
void cleanup_items(Item *item);
class THD;
void close_thread_tables(THD *thd, bool skip_mdl= 0);
void close_thread_tables(THD *thd, bool is_back_off= 0);
#ifndef NO_EMBEDDED_ACCESS_CHECKS
bool check_one_table_access(THD *thd, ulong privilege, TABLE_LIST *tables);

8
sql/rpl_injector.cc
View File

@ -83,10 +83,16 @@ int injector::transaction::commit()
explicitly.
*/
trans_commit_stmt(m_thd);
trans_commit(m_thd);
if (!trans_commit(m_thd))
{
close_thread_tables(m_thd);
if (!m_thd->locked_tables_mode)
m_thd->mdl_context.release_all_locks();
}
DBUG_RETURN(0);
}
int injector::transaction::use_table(server_id_type sid, table tbl)
{
DBUG_ENTER("injector::transaction::use_table");

15
sql/rpl_rli.cc
View File

@ -1189,6 +1189,8 @@ void Relay_log_info::cleanup_context(THD *thd, bool error)
}
m_table_map.clear_tables();
slave_close_thread_tables(thd);
if (error && !thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
clear_flag(IN_STMT);
/*
Cleanup for the flags that have been set at do_apply_event.
@ -1200,13 +1202,6 @@ void Relay_log_info::cleanup_context(THD *thd, bool error)
void Relay_log_info::clear_tables_to_lock()
{
/*
Deallocating elements of table list below will also free memory where
meta-data locks are stored. So we want to be sure that we don't have
any references to this memory left.
*/
DBUG_ASSERT(!current_thd->mdl_context.has_locks());
while (tables_to_lock)
{
uchar* to_free= reinterpret_cast<uchar*>(tables_to_lock);
@ -1225,12 +1220,6 @@ void Relay_log_info::clear_tables_to_lock()
void Relay_log_info::slave_close_thread_tables(THD *thd)
{
/*
Since we use same memory chunks for allocation of metadata lock
objects for tables as we use for allocating corresponding elements
of 'tables_to_lock' list, we have to release metadata locks by
closing tables before calling clear_tables_to_lock().
*/
close_thread_tables(thd);
clear_tables_to_lock();
}

12
sql/set_var.cc
View File

@ -3190,9 +3190,15 @@ static bool set_option_autocommit(THD *thd, set_var *var)
need to commit any outstanding transactions.
*/
if (var->save_result.ulong_value != 0 &&
(thd->options & OPTION_NOT_AUTOCOMMIT) &&
trans_commit(thd))
return 1;
(thd->options & OPTION_NOT_AUTOCOMMIT))
{
if (trans_commit(thd))
return TRUE;
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
}
if (var->save_result.ulong_value != 0)
thd->options&= ~((sys_var_thd_bit*) var->var)->bit_flag;

3
sql/slave.cc
View File

@ -2432,6 +2432,9 @@ static int exec_relay_log_event(THD* thd, Relay_log_info* rli)
{
exec_res= 0;
trans_rollback(thd);
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
/* chance for concurrent connection to get more locks */
safe_sleep(thd, min(rli->trans_retries, MAX_SLAVE_RETRY_PAUSE),
(CHECK_KILLED_FUNC)sql_slave_killed, (void*)rli);

10
sql/sql_acl.cc
View File

@ -30,6 +30,7 @@
#include <stdarg.h>
#include "sp_head.h"
#include "sp.h"
#include "transaction.h"
time_t mysql_db_table_last_check= 0L;
@ -676,9 +677,6 @@ my_bool acl_reload(THD *thd)
my_bool return_val= 1;
DBUG_ENTER("acl_reload");
/* Can't have locked tables here. */
thd->locked_tables_list.unlock_locked_tables(thd);
/*
To avoid deadlocks we should obtain table locks before
obtaining acl_cache->lock mutex.
@ -732,7 +730,10 @@ my_bool acl_reload(THD *thd)
if (old_initialized)
pthread_mutex_unlock(&acl_cache->lock);
end:
trans_commit_implicit(thd);
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
DBUG_RETURN(return_val);
}
@ -3900,7 +3901,10 @@ my_bool grant_reload(THD *thd)
free_root(&old_mem,MYF(0));
}
rw_unlock(&LOCK_grant);
trans_commit_implicit(thd);
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
/*
It is OK failing to load procs_priv table because we may be

55
sql/sql_base.cc
View File

@ -1478,11 +1478,22 @@ void close_thread_tables(THD *thd,
if (thd->open_tables)
close_open_tables(thd);
thd->mdl_context.release_all_locks();
if (!is_back_off)
{
thd->mdl_context.remove_all_requests();
}
/*
Defer the release of metadata locks until the current transaction
is either committed or rolled back. This prevents other statements
from modifying the table for the entire duration of this transaction.
This provides commitment ordering for guaranteeing serializability
across multiple transactions.
*/
if (!thd->in_multi_stmt_transaction() ||
(thd->state_flags & Open_tables_state::BACKUPS_AVAIL))
thd->mdl_context.release_all_locks();
DBUG_VOID_RETURN;
}
@ -2284,7 +2295,7 @@ open_table_get_mdl_lock(THD *thd, TABLE_LIST *table_list,
{
thd->mdl_context.add_request(mdl_request);
if (table_list->open_type)
if (table_list->lock_strategy)
{
/*
In case of CREATE TABLE .. If NOT EXISTS .. SELECT, the table
@ -2358,10 +2369,16 @@ open_table_get_mdl_lock(THD *thd, TABLE_LIST *table_list,
IMPLEMENTATION
Uses a cache of open tables to find a table not in use.
If table list element for the table to be opened has "open_type" set
to OPEN_OR_CREATE and table does not exist, this function will take
exclusive metadata lock on the table, also it will do this if
"open_type" is TAKE_EXCLUSIVE_MDL.
If TABLE_LIST::open_strategy is set to OPEN_IF_EXISTS, the table is opened
only if it exists. If the open strategy is OPEN_STUB, the underlying table
is never opened. In both cases, metadata locks are always taken according
to the lock strategy.
This function will take a exclusive metadata lock on the table if
TABLE_LIST::lock_strategy is EXCLUSIVE_DOWNGRADABLE_MDL or EXCLUSIVE_MDL.
If the lock strategy is EXCLUSIVE_DOWNGRADABLE_MDL and opening the table
is successful, the exclusive metadata lock is downgraded to a shared
lock.
RETURN
TRUE Open failed. "action" parameter may contain type of action
@ -2595,7 +2612,7 @@ bool open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
DBUG_RETURN(TRUE);
}
if (table_list->open_type == TABLE_LIST::OPEN_OR_CREATE)
if (table_list->open_strategy == TABLE_LIST::OPEN_IF_EXISTS)
{
bool exists;
@ -2609,7 +2626,7 @@ bool open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
}
/* Table exists. Let us try to open it. */
}
else if (table_list->open_type == TABLE_LIST::TAKE_EXCLUSIVE_MDL)
else if (table_list->open_strategy == TABLE_LIST::OPEN_STUB)
{
pthread_mutex_unlock(&LOCK_open);
DBUG_RETURN(FALSE);
@ -2794,7 +2811,7 @@ bool open_table(THD *thd, TABLE_LIST *table_list, MEM_ROOT *mem_root,
table exists now we should downgrade our exclusive metadata
lock on this table to shared metadata lock.
*/
if (table_list->open_type == TABLE_LIST::OPEN_OR_CREATE)
if (table_list->lock_strategy == TABLE_LIST::EXCLUSIVE_DOWNGRADABLE_MDL)
mdl_ticket->downgrade_exclusive_lock();
table->mdl_ticket= mdl_ticket;
@ -3623,7 +3640,7 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
/* Also used for indicating that prelocking is need */
TABLE_LIST **query_tables_last_own;
bool safe_to_ignore_table;
bool has_locks= thd->mdl_context.has_locks();
DBUG_ENTER("open_tables");
/*
temporary mem_root for new .frm parsing.
@ -3763,6 +3780,18 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
{
if (action)
{
/*
We have met a exclusive metadata lock or a old version of table and
we are inside a transaction that already hold locks. We can't follow
the locking protocol in this scenario as it might lead to deadlocks.
*/
if (thd->in_multi_stmt_transaction() && has_locks)
{
my_error(ER_LOCK_DEADLOCK, MYF(0));
result= -1;
goto err;
}
/*
We have met exclusive metadata lock or old version of table. Now we
have to close all tables which are not up to date/release metadata
@ -3841,7 +3870,7 @@ int open_tables(THD *thd, TABLE_LIST **start, uint *counter, uint flags)
Special types of open can succeed but still don't set
TABLE_LIST::table to anything.
*/
if (tables->open_type && !tables->table)
if (tables->open_strategy && !tables->table)
continue;
/*
@ -4122,7 +4151,7 @@ retry:
if (!error)
{
/*
We can't have a view or some special "open_type" in this function
We can't have a view or some special "open_strategy" in this function
so there should be a TABLE instance.
*/
DBUG_ASSERT(table_list->table);
@ -4662,6 +4691,8 @@ void close_tables_for_reopen(THD *thd, TABLE_LIST **tables, bool is_back_off)
for (TABLE_LIST *tmp= *tables; tmp; tmp= tmp->next_global)
tmp->table= 0;
close_thread_tables(thd, is_back_off);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
}

10
sql/sql_class.cc
View File

@ -995,8 +995,18 @@ void THD::cleanup(void)
trans_rollback(this);
xid_cache_delete(&transaction.xid_state);
}
locked_tables_list.unlock_locked_tables(this);
/*
If the thread was in the middle of an ongoing transaction (rolled
back a few lines above) or under LOCK TABLES (unlocked the tables
and left the mode a few lines above), there will be outstanding
metadata locks. Release them.
*/
DBUG_ASSERT(open_tables == NULL);
mdl_context.release_all_locks();
#if defined(ENABLED_DEBUG_SYNC)
/* End the Debug Sync Facility. See debug_sync.cc. */
debug_sync_end_thread(this);

85
sql/sql_parse.cc
View File

@ -122,11 +122,11 @@ static bool some_non_temp_table_to_be_updated(THD *thd, TABLE_LIST *tables)
@param mask Bitmask used for the SQL command match.
*/
static bool opt_implicit_commit(THD *thd, uint mask)
static bool stmt_causes_implicit_commit(THD *thd, uint mask)
{
LEX *lex= thd->lex;
bool res= FALSE, skip= FALSE;
DBUG_ENTER("opt_implicit_commit");
bool skip= FALSE;
DBUG_ENTER("stmt_causes_implicit_commit");
if (!(sql_command_flags[lex->sql_command] & mask))
DBUG_RETURN(FALSE);
@ -147,15 +147,7 @@ static bool opt_implicit_commit(THD *thd, uint mask)
break;
}
if (!skip)
{
/* Commit or rollback the statement transaction. */
thd->is_error() ? trans_rollback_stmt(thd) : trans_commit_stmt(thd);
/* Commit the normal transaction if one is active. */
res= trans_commit_implicit(thd);
}
DBUG_RETURN(res);
DBUG_RETURN(!skip);
}
@ -1168,6 +1160,9 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
ulong options= (ulong) (uchar) packet[0];
if (trans_commit_implicit(thd))
break;
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
if (check_global_access(thd,RELOAD_ACL))
break;
general_log_print(thd, command, NullS);
@ -1196,6 +1191,9 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
break;
if (trans_commit_implicit(thd))
break;
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
my_ok(thd);
break;
}
@ -1942,8 +1940,18 @@ mysql_execute_command(THD *thd)
not run in it's own transaction it may simply never appear on
the slave in case the outside transaction rolls back.
*/
if (opt_implicit_commit(thd, CF_IMPLICT_COMMIT_BEGIN))
goto error;
if (stmt_causes_implicit_commit(thd, CF_IMPLICT_COMMIT_BEGIN))
{
/* Commit or rollback the statement transaction. */
thd->is_error() ? trans_rollback_stmt(thd) : trans_commit_stmt(thd);
/* Commit the normal transaction if one is active. */
if (trans_commit_implicit(thd))
goto error;
/* Close tables and release metadata locks. */
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
}
switch (lex->sql_command) {
@ -2363,7 +2371,9 @@ case SQLCOM_PREPARE:
if (!(create_info.options & HA_LEX_CREATE_TMP_TABLE))
{
lex->link_first_table_back(create_table, link_to_local);
create_table->open_type= TABLE_LIST::OPEN_OR_CREATE;
/* Set strategies: reset default or 'prepared' values. */
create_table->open_strategy= TABLE_LIST::OPEN_IF_EXISTS;
create_table->lock_strategy= TABLE_LIST::EXCLUSIVE_DOWNGRADABLE_MDL;
}
if (!(res= open_and_lock_tables(thd, lex->query_tables)))
@ -3306,6 +3316,7 @@ end_with_restore_list:
if (thd->options & OPTION_TABLE_LOCK)
{
trans_commit_implicit(thd);
thd->mdl_context.release_all_locks();
thd->options&= ~(OPTION_TABLE_LOCK);
}
if (thd->global_read_lock)
@ -3317,6 +3328,8 @@ end_with_restore_list:
/* we must end the trasaction first, regardless of anything */
if (trans_commit_implicit(thd))
goto error;
/* release transactional metadata locks. */
thd->mdl_context.release_all_locks();
if (check_table_access(thd, LOCK_TABLES_ACL | SELECT_ACL, all_tables,
FALSE, UINT_MAX, FALSE))
goto error;
@ -3346,6 +3359,13 @@ end_with_restore_list:
*/
trans_rollback_stmt(thd);
trans_commit_implicit(thd);
/*
Close tables and release metadata locks otherwise a later call to
close_thread_tables might not release the locks if autocommit is off.
*/
close_thread_tables(thd);
DBUG_ASSERT(!thd->locked_tables_mode);
thd->mdl_context.release_all_locks();
thd->options&= ~(OPTION_TABLE_LOCK);
}
else
@ -3836,6 +3856,8 @@ end_with_restore_list:
thd->locked_tables_mode == LTM_LOCK_TABLES);
if (trans_commit(thd))
goto error;
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
/* Begin transaction with the same isolation level. */
if (lex->tx_chain && trans_begin(thd))
goto error;
@ -3849,6 +3871,8 @@ end_with_restore_list:
thd->locked_tables_mode == LTM_LOCK_TABLES);
if (trans_rollback(thd))
goto error;
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
/* Begin transaction with the same isolation level. */
if (lex->tx_chain && trans_begin(thd))
goto error;
@ -4196,6 +4220,12 @@ create_sp_error:
if (trans_commit_implicit(thd))
goto error;
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
#ifndef NO_EMBEDDED_ACCESS_CHECKS
if (sp_automatic_privileges && !opt_noacl &&
sp_revoke_privileges(thd, db, name,
@ -4375,11 +4405,15 @@ create_sp_error:
case SQLCOM_XA_COMMIT:
if (trans_xa_commit(thd))
goto error;
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
my_ok(thd);
break;
case SQLCOM_XA_ROLLBACK:
if (trans_xa_rollback(thd))
goto error;
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
my_ok(thd);
break;
case SQLCOM_XA_RECOVER:
@ -4524,10 +4558,20 @@ finish:
start_waiting_global_read_lock(thd);
}
/* If commit fails, we should be able to reset the OK status. */
thd->stmt_da->can_overwrite_status= TRUE;
opt_implicit_commit(thd, CF_IMPLICIT_COMMIT_END);
thd->stmt_da->can_overwrite_status= FALSE;
if (stmt_causes_implicit_commit(thd, CF_IMPLICIT_COMMIT_END))
{
/* If commit fails, we should be able to reset the OK status. */
thd->stmt_da->can_overwrite_status= TRUE;
/* Commit or rollback the statement transaction. */
thd->is_error() ? trans_rollback_stmt(thd) : trans_commit_stmt(thd);
/* Commit the normal transaction if one is active. */
trans_commit_implicit(thd);
/* Close tables and release metadata locks. */
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
thd->stmt_da->can_overwrite_status= FALSE;
}
DBUG_RETURN(res || thd->is_error());
}
@ -6508,6 +6552,9 @@ bool reload_acl_and_cache(THD *thd, ulong options, TABLE_LIST *tables,
query_cache.flush(); // RESET QUERY CACHE
}
#endif /*HAVE_QUERY_CACHE*/
DBUG_ASSERT(thd->locked_tables_mode || !thd->mdl_context.has_locks());
/*
Note that if REFRESH_READ_LOCK bit is set then REFRESH_TABLES is set too
(see sql_yacc.yy)

4
sql/sql_plugin.cc
View File

@ -1349,6 +1349,7 @@ static void plugin_load(MEM_ROOT *tmp_root, int *argc, char **argv)
#ifdef EMBEDDED_LIBRARY
bool table_exists;
#endif /* EMBEDDED_LIBRARY */
MDL_request mdl_request;
DBUG_ENTER("plugin_load");
if (!(new_thd= new THD))
@ -1366,7 +1367,8 @@ static void plugin_load(MEM_ROOT *tmp_root, int *argc, char **argv)
tables.alias= tables.table_name= (char*)"plugin";
tables.lock_type= TL_READ;
tables.db= new_thd->db;
alloc_mdl_requests(&tables, tmp_root);
tables.mdl_request= &mdl_request;
mdl_request.init(0, tables.db, tables.table_name);
#ifdef EMBEDDED_LIBRARY
/*

25
sql/sql_prepare.cc
View File

@ -1673,7 +1673,13 @@ static bool mysql_test_create_table(Prepared_statement *stmt)
if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE))
{
lex->link_first_table_back(create_table, link_to_local);
create_table->open_type= TABLE_LIST::OPEN_OR_CREATE;
/*
The open and lock strategies will be set again once the
statement is executed. These values are only meaningful
for the prepare phase.
*/
create_table->open_strategy= TABLE_LIST::OPEN_IF_EXISTS;
create_table->lock_strategy= TABLE_LIST::SHARED_MDL;
}
if (open_normal_and_derived_tables(stmt->thd, lex->query_tables, 0))
@ -3130,6 +3136,7 @@ bool Prepared_statement::prepare(const char *packet, uint packet_len)
bool error;
Statement stmt_backup;
Query_arena *old_stmt_arena;
MDL_ticket *mdl_savepoint= NULL;
DBUG_ENTER("Prepared_statement::prepare");
/*
If this is an SQLCOM_PREPARE, we also increase Com_prepare_sql.
@ -3188,6 +3195,13 @@ bool Prepared_statement::prepare(const char *packet, uint packet_len)
*/
DBUG_ASSERT(thd->change_list.is_empty());
/*
Marker used to release metadata locks acquired while the prepared
statement is being checked.
*/
if (thd->in_multi_stmt_transaction())
mdl_savepoint= thd->mdl_context.mdl_savepoint();
/*
The only case where we should have items in the thd->free_list is
after stmt->set_params_from_vars(), which may in some cases create
@ -3211,6 +3225,15 @@ bool Prepared_statement::prepare(const char *packet, uint packet_len)
lex_end(lex);
cleanup_stmt();
/*
If not inside a multi-statement transaction, the metadata locks have
already been released and the rollback_to_savepoint is a nop.
Otherwise, release acquired locks -- a NULL mdl_savepoint means that
all locks are going to be released or that the transaction didn't
own any locks.
*/
if (!thd->locked_tables_mode)
thd->mdl_context.rollback_to_savepoint(mdl_savepoint);
thd->restore_backup_statement(this, &stmt_backup);
thd->stmt_arena= old_stmt_arena;

7
sql/sql_servers.cc
View File

@ -39,6 +39,7 @@
#include <stdarg.h>
#include "sp_head.h"
#include "sp.h"
#include "transaction.h"
/*
We only use 1 mutex to guard the data structures - THR_LOCK_servers.
@ -224,9 +225,6 @@ bool servers_reload(THD *thd)
bool return_val= TRUE;
DBUG_ENTER("servers_reload");
/* Can't have locked tables here */
thd->locked_tables_list.unlock_locked_tables(thd);
DBUG_PRINT("info", ("locking servers_cache"));
rw_wrlock(&THR_LOCK_servers);
@ -252,7 +250,10 @@ bool servers_reload(THD *thd)
}
end:
trans_commit_implicit(thd);
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
DBUG_PRINT("info", ("unlocking servers_cache"));
rw_unlock(&THR_LOCK_servers);
DBUG_RETURN(return_val);

19
sql/sql_table.cc
View File

@ -1974,7 +1974,8 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
}
/* Probably a non-temporary table. */
non_temp_tables_count++;
if (!drop_temporary)
non_temp_tables_count++;
/*
If row-based replication is used and the table is not a
@ -4738,6 +4739,8 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
trans_commit_stmt(thd);
trans_commit(thd);
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
lex->reset_query_tables_list(FALSE);
table->table=0; // For query cache
if (protocol->write())
@ -4786,7 +4789,10 @@ static bool mysql_admin_table(THD* thd, TABLE_LIST* tables,
{
DBUG_PRINT("admin", ("recreating table"));
trans_rollback_stmt(thd);
trans_rollback(thd);
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
tmp_disable_binlog(thd); // binlogging is done by caller if wanted
result_code= mysql_recreate_table(thd, table);
reenable_binlog(thd);
@ -4899,14 +4905,17 @@ send_result_message:
reopen the table and do ha_innobase::analyze() on it.
We have to end the row, so analyze could return more rows.
*/
trans_commit_stmt(thd);
trans_commit(thd);
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
protocol->store(STRING_WITH_LEN("note"), system_charset_info);
protocol->store(STRING_WITH_LEN(
"Table does not support optimize, doing recreate + analyze instead"),
system_charset_info);
if (protocol->write())
goto err;
trans_commit_stmt(thd);
close_thread_tables(thd);
DBUG_PRINT("info", ("HA_ADMIN_TRY_ALTER, trying analyze..."));
TABLE_LIST *save_next_local= table->next_local,
*save_next_global= table->next_global;
@ -4923,7 +4932,10 @@ send_result_message:
if (thd->stmt_da->is_ok())
thd->stmt_da->reset_diagnostics_area();
trans_commit_stmt(thd);
trans_commit(thd);
close_thread_tables(thd);
if (!thd->locked_tables_mode)
thd->mdl_context.release_all_locks();
if (!result_code) // recreation went ok
{
if ((table->table= open_ltable(thd, table, lock_type, 0)) &&
@ -5017,6 +5029,7 @@ send_result_message:
query_cache_invalidate3(thd, table->table, 0);
}
}
/* Error path, a admin command failed. */
trans_commit_stmt(thd);
trans_commit_implicit(thd);
close_thread_tables(thd);

3
sql/sql_view.cc
View File

@ -395,7 +395,8 @@ bool mysql_create_view(THD *thd, TABLE_LIST *views,
goto err;
lex->link_first_table_back(view, link_to_local);
view->open_type= TABLE_LIST::TAKE_EXCLUSIVE_MDL;
view->open_strategy= TABLE_LIST::OPEN_STUB;
view->lock_strategy= TABLE_LIST::EXCLUSIVE_MDL;
if (open_and_lock_tables(thd, lex->query_tables))
{

38
sql/table.h
View File

@ -1350,24 +1350,36 @@ struct TABLE_LIST
bool prelocking_placeholder;
/**
Indicates that if TABLE_LIST object corresponds to the table/view
which requires special handling/meta-data locking.
which requires special handling.
*/
enum
{
/* Normal open, shared metadata lock should be taken. */
NORMAL_OPEN= 0,
/* Normal open. */
OPEN_NORMAL= 0,
/* Associate a table share only if the the table exists. */
OPEN_IF_EXISTS,
/* Don't associate a table share. */
OPEN_STUB
} open_strategy;
/**
Indicates the locking strategy for the object being opened:
whether the associated metadata lock is shared or exclusive.
*/
enum
{
/* Take a shared metadata lock before the object is opened. */
SHARED_MDL= 0,
/*
It's target table of CREATE TABLE ... SELECT so we should
either open table if it exists (and take shared metadata lock)
or take exclusive metadata lock if it doesn't exist.
Take a exclusive metadata lock before the object is opened.
If opening is successful, downgrade to a shared lock.
*/
OPEN_OR_CREATE,
/*
It's target view of CREATE/ALTER VIEW. We should take exclusive
metadata lock for this table list element.
*/
TAKE_EXCLUSIVE_MDL
} open_type;
EXCLUSIVE_DOWNGRADABLE_MDL,
/* Take a exclusive metadata lock before the object is opened. */
EXCLUSIVE_MDL
} lock_strategy;
/* For transactional locking. */
int lock_timeout; /* NOWAIT or WAIT [X] */
bool lock_transactional; /* If transactional lock requested. */
bool internal_tmp_table;
/** TRUE if an alias for this table was specified in the SQL. */
bool is_alias;

17
sql/transaction.cc
View File

@ -99,6 +99,12 @@ bool trans_begin(THD *thd, uint flags)
if (trans_commit_implicit(thd))
DBUG_RETURN(TRUE);
/*
Release transactional metadata locks only after the
transaction has been committed.
*/
thd->mdl_context.release_all_locks();
thd->options|= OPTION_BEGIN;
thd->server_status|= SERVER_STATUS_IN_TRANS;
@ -331,6 +337,13 @@ bool trans_savepoint(THD *thd, LEX_STRING name)
newsv->prev= thd->transaction.savepoints;
thd->transaction.savepoints= newsv;
/*
Remember the last acquired lock before the savepoint was set.
This is used as a marker to only release locks acquired after
the setting of this savepoint.
*/
newsv->mdl_savepoint = thd->mdl_context.mdl_savepoint();
DBUG_RETURN(FALSE);
}
@ -375,6 +388,10 @@ bool trans_rollback_to_savepoint(THD *thd, LEX_STRING name)
thd->transaction.savepoints= sv;
/* Release metadata locks that were acquired during this savepoint unit. */
if (!res && !thd->locked_tables_mode)
thd->mdl_context.rollback_to_savepoint(sv->mdl_savepoint);
DBUG_RETURN(test(res));
}

6
tests/mysql_client_test.c
View File

@ -18479,8 +18479,8 @@ static void test_wl4284_1()
mysql_free_result(result);
/* set AUTOCOMMIT to OFF */
rc= mysql_autocommit(mysql, FALSE);
/* set AUTOCOMMIT to ON */
rc= mysql_autocommit(mysql, TRUE);
myquery(rc);
rc= mysql_query(mysql, "DROP TABLE trans");
@ -18637,6 +18637,8 @@ static void test_bug40365(void)
DIE_UNLESS(tm[i].day == 0);
}
mysql_stmt_close(stmt);
rc= mysql_commit(mysql);
myquery(rc);
DBUG_VOID_RETURN;
}