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cffbb17480
Before MySQL 4.0.18, user-specified constraint names were ignored. Starting with MySQL 4.0.18, the specified constraint name was prepended with the schema name and '/'. Now we are transforming into a format where the constraint name is prepended with the dict_table_t::name and the impossible UTF-8 sequence 0xff. Generated constraint names will be ASCII decimal numbers. On upgrade, old FOREIGN KEY constraint names will be displayed without any schema name prefix. They will be updated to the new format on DDL operations. dict_foreign_t::sql_id(): Return the SQL constraint name without any schemaname/tablename\377 or schemaname/ prefix. row_rename_table_for_mysql(), dict_table_rename_in_cache(): Simplify the logic: Just rename constraints to the new format. dict_table_get_foreign_id(): Replaces dict_table_get_highest_foreign_id(). innobase_get_foreign_key_info(): Let my_error() refer to erroneous anonymous constraints as "(null)". row_delete_constraint(): Try to drop all 3 constraint name variants. Reviewed by: Thirunarayanan Balathandayuthapani Tested by: Matthias Leich
30 lines
792 B
Text
30 lines
792 B
Text
connection node_2;
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connection node_1;
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CREATE TABLE parent (
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id INT PRIMARY KEY,
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KEY (id)
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) ENGINE=InnoDB;
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CREATE TABLE child (
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id INT PRIMARY KEY,
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parent_id INT,
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FOREIGN KEY (parent_id)
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REFERENCES parent(id)
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) ENGINE=InnoDB;
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INSERT INTO parent VALUES (1);
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INSERT INTO child VALUES (1,1);
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SET SESSION foreign_key_checks = 0;
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INSERT INTO child VALUES (2,2);
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connection node_2;
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SELECT COUNT(*) = 1 FROM child WHERE id = 2;
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COUNT(*) = 1
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1
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INSERT INTO child VALUES (3,3);
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ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`child`, CONSTRAINT `1` FOREIGN KEY (`parent_id`) REFERENCES `parent` (`id`))
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SET SESSION foreign_key_checks = 0;
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DELETE FROM parent;
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connection node_1;
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SELECT COUNT(*) = 0 FROM parent;
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COUNT(*) = 0
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1
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DROP TABLE child;
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DROP TABLE parent;
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