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e581396b7a
Before commit6112853cdain MySQL 4.1.1 introduced the parameter innodb_file_per_table, all InnoDB data was written to the InnoDB system tablespace (often named ibdata1). A serious design problem is that once the system tablespace has grown to some size, it cannot shrink even if the data inside it has been deleted. There are also other design problems, such as the server hang MDEV-29930 that should only be possible when using innodb_file_per_table=0 and innodb_undo_tablespaces=0 (storing both tables and undo logs in the InnoDB system tablespace). The parameter innodb_change_buffering was deprecated in commitb5852ffbee. Starting with commitbaf276e6d4(MDEV-19229) the number of innodb_undo_tablespaces can be increased, so that the undo logs can be moved out of the system tablespace of an existing installation. If all these things (tables, undo logs, and the change buffer) are removed from the InnoDB system tablespace, the only variable-size data structure inside it is the InnoDB data dictionary. DDL operations on .ibd files was optimized in commit86dc7b4d4c(MDEV-24626). That should have removed any thinkable performance advantage of using innodb_file_per_table=0. Since there should be no benefit of setting innodb_file_per_table=0, the parameter should be deprecated. Starting with MySQL 5.6 and MariaDB Server 10.0, the default value is innodb_file_per_table=1.
300 lines
7.8 KiB
Text
300 lines
7.8 KiB
Text
FLUSH TABLES WITH READ LOCK AND DISABLE CHECKPOINT;
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UNLOCK TABLES;
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CREATE TABLE t1 ( m MEDIUMTEXT ) ENGINE=InnoDB;
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INSERT INTO t1 VALUES ( REPEAT('i',65535) );
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DROP TABLE t1;
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#
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# WL#6168: FLUSH TABLES ... FOR EXPORT -- parser
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#
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# new "EXPORT" keyword is a valid user variable name:
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SET @export = 10;
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# new "EXPORT" keyword is a valid SP parameter name:
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CREATE PROCEDURE p1(export INT) BEGIN END;
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DROP PROCEDURE p1;
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# new "EXPORT" keyword is a valid local variable name:
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CREATE PROCEDURE p1()
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BEGIN
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DECLARE export INT;
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END|
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DROP PROCEDURE p1;
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# new "EXPORT" keyword is a valid SP name:
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CREATE PROCEDURE export() BEGIN END;
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DROP PROCEDURE export;
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# new FLUSH TABLES ... FOR EXPORT syntax:
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FLUSH TABLES FOR EXPORT;
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ERROR 42000: No tables used near 'FOR EXPORT' at line 1
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FLUSH TABLES WITH EXPORT;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'EXPORT' at line 1
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CREATE TABLE t1 (i INT) engine=InnoDB;
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CREATE TABLE t2 LIKE t1;
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FLUSH TABLES t1,t2 WITH EXPORT;
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ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'EXPORT' at line 1
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FLUSH TABLES t1, t2 FOR EXPORT;
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UNLOCK TABLES;
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# case check
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FLUSH TABLES t1, t2 for ExPoRt;
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UNLOCK TABLES;
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# With LOCAL keyword
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FLUSH LOCAL TABLES t1, t2 FOR EXPORT;
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UNLOCK TABLES;
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# Tables with fully qualified names
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FLUSH LOCAL TABLES test.t1, test.t2 for ExPoRt;
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UNLOCK TABLES;
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DROP TABLES t1, t2;
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# new "EXPORT" keyword is a valid table name:
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CREATE TABLE export (i INT) engine=InnoDB;
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# it's ok to lock the "export" table for export:
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FLUSH TABLE export FOR EXPORT;
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UNLOCK TABLES;
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DROP TABLE export;
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#
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# WL#6169 FLUSH TABLES ... FOR EXPORT -- runtime
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#
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# Test 1: Views, temporary tables, non-existent tables
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#
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CREATE VIEW v1 AS SELECT 1;
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CREATE TEMPORARY TABLE t1 (a INT);
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FLUSH TABLES v1 FOR EXPORT;
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UNLOCK TABLES;
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FLUSH TABLES t1 FOR EXPORT;
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ERROR 42S02: Table 'test.t1' doesn't exist
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FLUSH TABLES non_existent FOR EXPORT;
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ERROR 42S02: Table 'test.non_existent' doesn't exist
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DROP TEMPORARY TABLE t1;
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DROP VIEW v1;
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# Test 2: Blocked by update transactions, blocks updates.
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#
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CREATE TABLE t1 (a INT PRIMARY KEY, b INT) engine= InnoDB;
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CREATE TABLE t2 (a INT) engine= InnoDB;
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connect con1, localhost, root;
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START TRANSACTION;
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INSERT INTO t1 VALUES (1, 1);
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connection default;
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# Should be blocked
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# Sending:
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FLUSH TABLES t1 FOR EXPORT;
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connection con1;
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COMMIT;
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connection default;
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# Reaping: FLUSH TABLES t1 FOR EXPORT
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connection con1;
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# Should not be blocked
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INSERT INTO t2 VALUES (1);
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# Should be blocked
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# Sending:
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INSERT INTO t1 VALUES (2, 2);
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connection default;
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UNLOCK TABLES;
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connection con1;
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# Reaping: INSERT INTO t1 VALUES (2, 2);
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# Test 3: Read operations should not be affected.
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#
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START TRANSACTION;
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SELECT * FROM t1;
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a b
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1 1
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2 2
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connection default;
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# Should not be blocked
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FLUSH TABLES t1 FOR EXPORT;
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connection con1;
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COMMIT;
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# Should not be blocked
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SELECT * FROM t1;
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a b
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1 1
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2 2
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connection default;
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UNLOCK TABLES;
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# Test 4: Blocked by DDL, blocks DDL.
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#
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START TRANSACTION;
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SELECT * FROM t1;
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a b
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1 1
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2 2
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connect con2, localhost, root;
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# Sending:
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ALTER TABLE t1 ADD INDEX i1(b);
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connection con1;
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# Should be blocked
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FLUSH TABLE t1 FOR EXPORT;
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connection default;
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COMMIT;
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connection con2;
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# Reaping ALTER TABLE ...
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connection con1;
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# Reaping FLUSH TABLE t1 FOR EXPORT
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UNLOCK TABLES;
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connection default;
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FLUSH TABLE t1 FOR EXPORT;
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connection con2;
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# Should be blocked
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DROP TABLE t1;
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connection default;
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UNLOCK TABLES;
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connection con2;
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# Reaping DROP TABLE t1
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disconnect con2;
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connection default;
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DROP TABLE t2;
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# Test 5: Compatibilty with FLUSH TABLES WITH READ LOCK
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#
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CREATE TABLE t1(a INT) engine= InnoDB;
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FLUSH TABLES WITH READ LOCK;
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connection con1;
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# This should not block
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FLUSH TABLE t1 FOR EXPORT;
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UNLOCK TABLES;
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connection default;
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UNLOCK TABLES;
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DROP TABLE t1;
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# Test 6: Unsupported storage engines.
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#
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CREATE TABLE t1(a INT) engine= MEMORY;
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FLUSH TABLE t1 FOR EXPORT;
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ERROR HY000: Storage engine MEMORY of the table `test`.`t1` doesn't have this option
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DROP TABLE t1;
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connection con1;
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disconnect con1;
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connection default;
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# Test 7: Check privileges required.
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# in flush-innodb-notembedded.test
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# Test 8: FLUSH TABLE <table_list> FOR EXPORT is incompatible
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# with itself (to avoid race conditions in metadata
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# file handling).
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#
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CREATE TABLE t1 (a INT) engine= InnoDB;
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CREATE TABLE t2 (a INT) engine= InnoDB;
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connect con1, localhost, root;
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FLUSH TABLE t1 FOR EXPORT;
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connection default;
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# This should not block
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FLUSH TABLE t2 FOR EXPORT;
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UNLOCK TABLES;
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# This should block
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# Sending:
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FLUSH TABLE t1 FOR EXPORT;
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connection con1;
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UNLOCK TABLES;
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connection default;
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# Reaping: FLUSH TABLE t1 FOR EXPORT
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UNLOCK TABLES;
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# Test 9: LOCK TABLES ... READ is not affected
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#
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LOCK TABLE t1 READ;
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connection con1;
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# Should not block
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FLUSH TABLE t1 FOR EXPORT;
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UNLOCK TABLES;
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connection default;
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UNLOCK TABLES;
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FLUSH TABLE t1 FOR EXPORT;
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connection con1;
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# Should not block
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LOCK TABLE t1 READ;
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UNLOCK TABLES;
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connection default;
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UNLOCK TABLES;
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connection con1;
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disconnect con1;
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connection default;
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DROP TABLE t1, t2;
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# Test 10: Lock is released if transaction is started after doing
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# 'flush table..' in same session
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CREATE TABLE t1 ( i INT ) ENGINE = Innodb;
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FLUSH TABLE t1 FOR EXPORT;
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# error as active locks already exist
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FLUSH TABLE t1 FOR EXPORT;
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ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
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# active locks will be released due to start transaction
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START TRANSACTION;
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# passes as start transaction released ealier locks
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FLUSH TABLE t1 FOR EXPORT;
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UNLOCK TABLES;
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DROP TABLE t1;
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# Test 11: Test 'flush table with fully qualified table names
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# and with syntax local/NO_WRITE_TO_BINLOG
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connect con1, localhost, root;
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connection default;
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CREATE TABLE t1 ( i INT ) ENGINE = Innodb;
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INSERT INTO t1 VALUES (100),(200);
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FLUSH LOCAL TABLES test.t1 FOR EXPORT;
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connection con1;
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# Should be blocked
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# Sending:
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FLUSH LOCAL TABLES t1 FOR EXPORT;
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connection default;
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UNLOCK TABLE;
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connection con1;
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# Reaping: FLUSH LOCAL TABLES t1 FOR EXPORT
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SELECT * FROM t1 ORDER BY i;
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i
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100
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200
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connection default;
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# Should be blocked
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# Sending:
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FLUSH NO_WRITE_TO_BINLOG TABLES test.t1 FOR EXPORT;
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connection con1;
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UNLOCK TABLES;
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connection default;
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# Reaping: FLUSH NO_WRITE_TO_BINLOG TABLES test.t1 FOR EXPORT
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SELECT * FROM t1 ORDER BY i;
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i
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100
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200
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UNLOCK TABLE;
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DROP TABLE t1;
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# Test 12: Active transaction get committed if user execute
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# "FLUSH TABLE ... FOR EXPORT" or "LOCK TABLE.."
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connection default;
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CREATE TABLE t1 ( i INT ) ENGINE = Innodb;
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INSERT INTO t1 VALUES (100),(200);
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START TRANSACTION;
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INSERT INTO t1 VALUES (300);
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# 'flush table..' commit active transaction from same session
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FLUSH LOCAL TABLES test.t1 FOR EXPORT;
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ROLLBACK;
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SELECT * FROM t1 ORDER BY i;
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i
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100
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200
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300
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START TRANSACTION;
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INSERT INTO t1 VALUES (400);
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# 'lock table ..' commit active transaction from same session
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LOCK TABLES test.t1 READ;
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ROLLBACK;
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SELECT * FROM t1 ORDER BY i;
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i
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100
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200
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300
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400
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UNLOCK TABLES;
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DROP TABLE t1;
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# Test 13: Verify "FLUSH TABLE ... FOR EXPORT" and "LOCK TABLE.."
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# in same session
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connection default;
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CREATE TABLE t1 ( i INT ) ENGINE = Innodb;
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# Lock table
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LOCK TABLES test.t1 WRITE;
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# 'lock table ..' completes even if table lock is acquired
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# in same session using 'lock table'. Previous locks are released.
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LOCK TABLES test.t1 READ;
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# 'flush table ..' gives error if table lock is acquired
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# in same session using 'lock table ..'
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FLUSH TABLES test.t1 FOR EXPORT;
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ERROR HY000: Can't execute the given command because you have active locked tables or an active transaction
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# 'lock table ..' completes even if table lock is acquired
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# in same session using 'flush table'. Previous locks are released.
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LOCK TABLES test.t1 WRITE;
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UNLOCK TABLES;
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DROP TABLE t1;
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connection con1;
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disconnect con1;
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connection default;
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# End of 5.6 tests
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