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53 lines
1.9 KiB
Text
53 lines
1.9 KiB
Text
#
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# Bug #19471516 SERVER CRASHES WHEN EXECUTING ALTER TABLE
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# ADD FOREIGN KEY
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#
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CREATE TABLE `department` (`department_id` INT, `department_people_fk` INT,
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PRIMARY KEY (`department_id`)) engine=innodb;
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CREATE TABLE `title` (`title_id` INT, `title_manager_fk` INT,
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`title_reporter_fk` INT, PRIMARY KEY (`title_id`)) engine=innodb;
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CREATE TABLE `people` (`people_id` INT, PRIMARY KEY (`people_id`)) engine=innodb;
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ALTER TABLE `department` ADD FOREIGN KEY (`department_people_fk`) REFERENCES
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`people` (`people_id`);
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ALTER TABLE `title` ADD FOREIGN KEY (`title_manager_fk`) REFERENCES `people`
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(`people_id`);
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ALTER TABLE `title` ADD FOREIGN KEY (`title_reporter_fk`) REFERENCES `people`
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(`people_id`);
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drop table title, department, people;
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create table t1 (a int primary key, b int) engine=innodb;
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create table t2 (c int primary key, d int,
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foreign key (d) references t1 (a) on update cascade) engine=innodb;
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insert t1 values (1,1),(2,2),(3,3);
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insert t2 values (4,1),(5,2),(6,3);
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flush table t2 with read lock;
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connect con1,localhost,root;
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delete from t1 where a=2;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
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update t1 set a=10 where a=1;
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connection default;
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unlock tables;
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connection con1;
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connection default;
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lock table t2 write;
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connection con1;
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delete from t1 where a=2;
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connection default;
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unlock tables;
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connection con1;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t2`, CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`d`) REFERENCES `t1` (`a`) ON UPDATE CASCADE)
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connection default;
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unlock tables;
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disconnect con1;
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create user foo;
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grant select,update on test.t1 to foo;
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connect foo,localhost,foo;
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update t1 set a=30 where a=3;
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disconnect foo;
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connection default;
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select * from t2;
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c d
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5 2
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4 10
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6 30
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drop table t2, t1;
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drop user foo;
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