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Bug#60196 / Bug#11831040
Setting lowercase_table_names to 2 on Windows causing Foreign Key problems This problem was exposed by the fix for Bug#55222. There was a codepath in dict0load.c, dict_load_foreigns() that made sure the table name matched case sensitive in order to load a referenced table into the dictionary as needed. If an engine is rebooted which accesses a table with foreign keys, and lower_case_table_names=2, then the table with foreign keys will get an error when it is changed (insert/updated/delete). Once the referenced tables are loaded into the dictionary cache by a select statement on those tables, the same change would succeed because the affected code path would not get followed.
This commit is contained in:
76
mysql-test/suite/innodb/r/innodb_bug60196.result
Executable file
76
mysql-test/suite/innodb/r/innodb_bug60196.result
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@@ -0,0 +1,76 @@
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DROP TABLE IF EXISTS Bug_60196_FK1 ;
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DROP TABLE IF EXISTS Bug_60196_FK2 ;
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DROP TABLE IF EXISTS Bug_60196 ;
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CREATE TABLE `Bug_60196_FK1` (Primary_Key INT PRIMARY KEY) ENGINE=InnoDB;
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CREATE TABLE `Bug_60196_FK2` (Primary_Key INT PRIMARY KEY) ENGINE=InnoDB;
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CREATE TABLE `Bug_60196` (
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FK1_Key INT NOT NULL,
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FK2_Key INT NOT NULL,
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PRIMARY KEY (FK2_Key, FK1_Key),
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KEY FK1_Key (FK1_Key),
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KEY FK2_Key (FK2_Key),
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CONSTRAINT FK_FK1 FOREIGN KEY (FK1_Key)
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REFERENCES Bug_60196_FK1 (Primary_Key)
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ON DELETE CASCADE
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ON UPDATE CASCADE,
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CONSTRAINT FK_FK2 FOREIGN KEY (FK2_Key)
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REFERENCES Bug_60196_FK2 (Primary_Key)
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ON DELETE CASCADE
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ON UPDATE CASCADE
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) ENGINE=InnoDB;
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INSERT INTO Bug_60196_FK1 VALUES (1), (2), (3), (4), (5);
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INSERT INTO Bug_60196_FK2 VALUES (1), (2), (3), (4), (5);
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INSERT INTO Bug_60196 VALUES (1, 1);
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INSERT INTO Bug_60196 VALUES (1, 2);
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INSERT INTO Bug_60196 VALUES (1, 3);
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INSERT INTO Bug_60196 VALUES (1, 99);
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ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`bug_60196`, CONSTRAINT `FK_FK2` FOREIGN KEY (`FK2_Key`) REFERENCES `Bug_60196_FK2` (`Primary_Key`) ON DELETE CASCADE ON UPDATE CASCADE)
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INSERT INTO Bug_60196 VALUES (99, 1);
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ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`bug_60196`, CONSTRAINT `FK_FK1` FOREIGN KEY (`FK1_Key`) REFERENCES `Bug_60196_FK1` (`Primary_Key`) ON DELETE CASCADE ON UPDATE CASCADE)
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SELECT * FROM bug_60196_FK1;
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Primary_Key
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1
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2
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3
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4
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5
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SELECT * FROM bug_60196_FK2;
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Primary_Key
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1
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2
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3
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4
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5
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SELECT * FROM bug_60196;
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FK1_Key FK2_Key
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1 1
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1 2
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1 3
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# Stop master server
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# Restart server.
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#
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# Try to insert more to the example table with foreign keys.
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# Bug60196 causes the foreign key file not to be found after
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# the resstart above.
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#
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SELECT * FROM Bug_60196;
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FK1_Key FK2_Key
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1 1
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1 2
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1 3
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INSERT INTO Bug_60196 VALUES (2, 1);
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INSERT INTO Bug_60196 VALUES (2, 2);
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INSERT INTO Bug_60196 VALUES (2, 3);
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SELECT * FROM Bug_60196;
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FK1_Key FK2_Key
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1 1
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1 2
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1 3
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2 1
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2 2
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2 3
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# Clean up.
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DROP TABLE Bug_60196;
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DROP TABLE Bug_60196_FK1;
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DROP TABLE Bug_60196_FK2;
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1
mysql-test/suite/innodb/t/innodb_bug60196-master.opt
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1
mysql-test/suite/innodb/t/innodb_bug60196-master.opt
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--lower-case-table-names=2
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91
mysql-test/suite/innodb/t/innodb_bug60196.test
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91
mysql-test/suite/innodb/t/innodb_bug60196.test
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# Bug#60196 - Setting lowercase_table_names to 2 on Windows causing
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# Foreign Key problems after an engine is restarted.
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# This test case needs InnoDB.
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-- source include/have_innodb.inc
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#
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# Precautionary clean up.
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#
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--disable_warnings
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DROP TABLE IF EXISTS Bug_60196_FK1 ;
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DROP TABLE IF EXISTS Bug_60196_FK2 ;
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DROP TABLE IF EXISTS Bug_60196 ;
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--enable_warnings
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#
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# Create test data.
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#
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CREATE TABLE `Bug_60196_FK1` (Primary_Key INT PRIMARY KEY) ENGINE=InnoDB;
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CREATE TABLE `Bug_60196_FK2` (Primary_Key INT PRIMARY KEY) ENGINE=InnoDB;
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CREATE TABLE `Bug_60196` (
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FK1_Key INT NOT NULL,
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FK2_Key INT NOT NULL,
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PRIMARY KEY (FK2_Key, FK1_Key),
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KEY FK1_Key (FK1_Key),
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KEY FK2_Key (FK2_Key),
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CONSTRAINT FK_FK1 FOREIGN KEY (FK1_Key)
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REFERENCES Bug_60196_FK1 (Primary_Key)
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ON DELETE CASCADE
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ON UPDATE CASCADE,
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CONSTRAINT FK_FK2 FOREIGN KEY (FK2_Key)
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REFERENCES Bug_60196_FK2 (Primary_Key)
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ON DELETE CASCADE
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ON UPDATE CASCADE
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) ENGINE=InnoDB;
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INSERT INTO Bug_60196_FK1 VALUES (1), (2), (3), (4), (5);
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INSERT INTO Bug_60196_FK2 VALUES (1), (2), (3), (4), (5);
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INSERT INTO Bug_60196 VALUES (1, 1);
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INSERT INTO Bug_60196 VALUES (1, 2);
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INSERT INTO Bug_60196 VALUES (1, 3);
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--error ER_NO_REFERENCED_ROW_2
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INSERT INTO Bug_60196 VALUES (1, 99);
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--error ER_NO_REFERENCED_ROW_2
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INSERT INTO Bug_60196 VALUES (99, 1);
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SELECT * FROM bug_60196_FK1;
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SELECT * FROM bug_60196_FK2;
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SELECT * FROM bug_60196;
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--echo # Stop master server
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# Write file to make mysql-test-run.pl wait for the server to stop
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-- exec echo "wait" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
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# Send a shutdown request to the server
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-- shutdown_server 10
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# Call script that will poll the server waiting for it to disapear
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-- source include/wait_until_disconnected.inc
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--echo # Restart server.
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# Write file to make mysql-test-run.pl start up the server again
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--exec echo "restart" > $MYSQLTEST_VARDIR/tmp/mysqld.1.expect
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# Turn on reconnect
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--enable_reconnect
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# Call script that will poll the server waiting for it to be back online again
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--source include/wait_until_connected_again.inc
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# Turn off reconnect again
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--disable_reconnect
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--echo #
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--echo # Try to insert more to the example table with foreign keys.
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--echo # Bug60196 causes the foreign key file not to be found after
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--echo # the resstart above.
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--echo #
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SELECT * FROM Bug_60196;
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INSERT INTO Bug_60196 VALUES (2, 1);
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INSERT INTO Bug_60196 VALUES (2, 2);
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INSERT INTO Bug_60196 VALUES (2, 3);
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SELECT * FROM Bug_60196;
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--echo
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--echo # Clean up.
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DROP TABLE Bug_60196;
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DROP TABLE Bug_60196_FK1;
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DROP TABLE Bug_60196_FK2;
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@@ -2258,10 +2258,12 @@ loop:
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/* Since table names in SYS_FOREIGN are stored in a case-insensitive
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/* Since table names in SYS_FOREIGN are stored in a case-insensitive
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order, we have to check that the table name matches also in a binary
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order, we have to check that the table name matches also in a binary
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string comparison. On Unix, MySQL allows table names that only differ
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string comparison. On Unix, MySQL allows table names that only differ
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in character case. */
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in character case. If lower_case_table_names=2 then what is stored
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may not be the same case, but the previous comparison showed that they
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if (0 != ut_memcmp(field, table_name, len)) {
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match with no-case. */
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if ((srv_lower_case_table_names != 2)
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&& (0 != ut_memcmp(field, table_name, len))) {
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goto next_rec;
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goto next_rec;
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}
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}
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