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MDEV-4984: Implement MASTER_GTID_WAIT() and @@LAST_GTID.

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MASTER_GTID_WAIT() is similar to MASTER_POS_WAIT(), but works with a
GTID position rather than an old-style filename/offset.

@@LAST_GTID gives the GTID assigned to the last transaction written
into the binlog.

Together, the two can be used by applications to obtain the GTID of
an update on the master, and then do a MASTER_GTID_WAIT() for that
position on any read slave where it is important to get results that
are caught up with the master at least to the point of the update.

The implementation of MASTER_GTID_WAIT() is implemented in a way
that tries to minimise the performance impact on the SQL threads,
even in the presense of many waiters on single GTID positions (as
from @@LAST_GTID).
This commit is contained in:
unknown
2014-02-07 19:15:28 +01:00
parent ce02738d7f
commit 4e6606acad
26 changed files with 1084 additions and 39 deletions
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110
mysql-test/suite/rpl/r/rpl_gtid_basic.result
View File

@@ -197,9 +197,119 @@ CREATE TABLE t1 (a INT PRIMARY KEY);
SET gtid_seq_no=100;
INSERT INTO t1 VALUES (1);
include/start_slave.inc
include/sync_with_master_gtid.inc
SELECT * FROM t1;
a
1
Gtid_IO_Pos = '0-1-100'
*** Test @@LAST_GTID and MASTER_GTID_WAIT() ***
DROP TABLE t1;
CREATE TABLE t1 (a INT PRIMARY KEY) ENGINE=InnoDB;
include/stop_slave.inc
SELECT @@last_gtid;
@@last_gtid
SET gtid_seq_no=110;
SELECT @@last_gtid;
@@last_gtid
BEGIN;
SELECT @@last_gtid;
@@last_gtid
INSERT INTO t1 VALUES (2);
SELECT @@last_gtid;
@@last_gtid
COMMIT;
SELECT @@last_gtid;
@@last_gtid
0-1-110
SET @pos= '0-1-110';
SELECT master_gtid_wait(NULL);
master_gtid_wait(NULL)
NULL
SELECT master_gtid_wait('', NULL);
master_gtid_wait('', NULL)
0
SELECT master_gtid_wait(@pos, 0.5);
master_gtid_wait(@pos, 0.5)
-1
SELECT * FROM t1 ORDER BY a;
a
SELECT master_gtid_wait(@pos);
include/start_slave.inc
master_gtid_wait(@pos)
0
SELECT * FROM t1 ORDER BY a;
a
2
include/stop_slave.inc
SET gtid_domain_id= 1;
INSERT INTO t1 VALUES (3);
SET @pos= '1-1-1,0-1-110';
SELECT master_gtid_wait(@pos, 0);
master_gtid_wait(@pos, 0)
-1
SELECT * FROM t1 WHERE a >= 3;
a
SELECT master_gtid_wait(@pos, -1);
include/start_slave.inc
master_gtid_wait(@pos, -1)
0
SELECT * FROM t1 WHERE a >= 3;
a
3
SELECT master_gtid_wait('1-1-1', 0);
master_gtid_wait('1-1-1', 0)
0
SELECT master_gtid_wait('2-1-1,1-1-4,0-1-110');
SELECT master_gtid_wait('0-1-1000', 0.5);
SELECT master_gtid_wait('0-1-2000');
SELECT master_gtid_wait('2-1-10');
SELECT master_gtid_wait('2-1-5', 1);
SELECT master_gtid_wait('2-1-5');
SELECT master_gtid_wait('2-1-10');
SELECT master_gtid_wait('2-1-5,1-1-4,0-1-110');
SELECT master_gtid_wait('2-1-2');
SELECT master_gtid_wait('1-1-1');
master_gtid_wait('1-1-1')
0
SELECT master_gtid_wait('0-1-109');
SELECT master_gtid_wait('2-1-2', 0.5);
master_gtid_wait('2-1-2', 0.5)
-1
KILL QUERY 22;
ERROR 70100: Query execution was interrupted
SET gtid_domain_id=2;
SET gtid_seq_no=2;
INSERT INTO t1 VALUES (4);
master_gtid_wait('2-1-2')
0
KILL CONNECTION 25;
ERROR HY000: Lost connection to MySQL server during query
SET gtid_domain_id=1;
SET gtid_seq_no=4;
INSERT INTO t1 VALUES (5);
SET gtid_domain_id=2;
SET gtid_seq_no=5;
INSERT INTO t1 VALUES (6);
master_gtid_wait('2-1-5,1-1-4,0-1-110')
0
master_gtid_wait('2-1-1,1-1-4,0-1-110')
0
master_gtid_wait('0-1-1000', 0.5)
-1
master_gtid_wait('2-1-5', 1)
0
master_gtid_wait('0-1-109')
0
SET gtid_domain_id=2;
SET gtid_seq_no=10;
INSERT INTO t1 VALUES (7);
master_gtid_wait('2-1-10')
0
master_gtid_wait('2-1-10')
0
DROP TABLE t1;
include/rpl_end.inc