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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
42 lines
1.3 KiB
Text
42 lines
1.3 KiB
Text
CREATE TABLE product (category INT NOT NULL, id INT NOT NULL,
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price DECIMAL, PRIMARY KEY(category, id)) ENGINE=INNODB;
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CREATE TABLE customer (id INT NOT NULL, PRIMARY KEY (id)) ENGINE=INNODB;
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CREATE TABLE product_order (no INT NOT NULL AUTO_INCREMENT,
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product_category INT NOT NULL,
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product_id INT NOT NULL,
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customer_id INT NOT NULL,
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PRIMARY KEY(no),
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INDEX (product_category, product_id),
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FOREIGN KEY (product_category, product_id)
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REFERENCES product(category, id) ON UPDATE CASCADE ON DELETE RESTRICT,
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INDEX (customer_id),
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FOREIGN KEY (customer_id)
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REFERENCES customer(id)
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) ENGINE=INNODB;
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SELECT * FROM INFORMATION_SCHEMA.REFERENTIAL_CONSTRAINTS
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WHERE table_name = 'product_order';
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CONSTRAINT_CATALOG def
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CONSTRAINT_SCHEMA test
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CONSTRAINT_NAME 1
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UNIQUE_CONSTRAINT_CATALOG def
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UNIQUE_CONSTRAINT_SCHEMA test
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UNIQUE_CONSTRAINT_NAME PRIMARY
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MATCH_OPTION NONE
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UPDATE_RULE CASCADE
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DELETE_RULE RESTRICT
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TABLE_NAME product_order
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REFERENCED_TABLE_NAME product
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CONSTRAINT_CATALOG def
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CONSTRAINT_SCHEMA test
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CONSTRAINT_NAME 2
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UNIQUE_CONSTRAINT_CATALOG def
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UNIQUE_CONSTRAINT_SCHEMA test
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UNIQUE_CONSTRAINT_NAME PRIMARY
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MATCH_OPTION NONE
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UPDATE_RULE RESTRICT
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DELETE_RULE RESTRICT
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TABLE_NAME product_order
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REFERENCED_TABLE_NAME customer
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DROP TABLE product_order;
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DROP TABLE product;
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DROP TABLE customer;
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