我有一组InnoDB
表,我经常需要通过删除一些行并插入其他行来维护这些表。其中一些表具有引用其他表的外键约束,因此这意味着表加载顺序很重要。要插入新行而不必担心表的顺序,我使用:
SET FOREIGN_KEY_CHECKS=0;
之前,然后:
SET FOREIGN_KEY_CHECKS=1;
后。
当加载完成后,我想检查更新表中的数据是否仍然保持参照完整性 - 新行不会破坏外键约束 - 但似乎没有办法做此
作为测试,我输入的数据确实违反了外键约束,并且在重新启用外键检查时,mysql没有产生警告或错误。
如果我试图找到一种方法来指定表加载顺序,并在加载过程中保留外键检查,这将不允许我在具有自引用外键约束的表中加载数据,所以这不是一个可以接受的解决方案。
有没有办法强制InnoDB验证表或数据库的外键约束?
答案 0 :(得分:95)
DELIMITER $$
DROP PROCEDURE IF EXISTS ANALYZE_INVALID_FOREIGN_KEYS$$
CREATE
PROCEDURE `ANALYZE_INVALID_FOREIGN_KEYS`(
checked_database_name VARCHAR(64),
checked_table_name VARCHAR(64),
temporary_result_table ENUM('Y', 'N'))
LANGUAGE SQL
NOT DETERMINISTIC
READS SQL DATA
BEGIN
DECLARE TABLE_SCHEMA_VAR VARCHAR(64);
DECLARE TABLE_NAME_VAR VARCHAR(64);
DECLARE COLUMN_NAME_VAR VARCHAR(64);
DECLARE CONSTRAINT_NAME_VAR VARCHAR(64);
DECLARE REFERENCED_TABLE_SCHEMA_VAR VARCHAR(64);
DECLARE REFERENCED_TABLE_NAME_VAR VARCHAR(64);
DECLARE REFERENCED_COLUMN_NAME_VAR VARCHAR(64);
DECLARE KEYS_SQL_VAR VARCHAR(1024);
DECLARE done INT DEFAULT 0;
DECLARE foreign_key_cursor CURSOR FOR
SELECT
`TABLE_SCHEMA`,
`TABLE_NAME`,
`COLUMN_NAME`,
`CONSTRAINT_NAME`,
`REFERENCED_TABLE_SCHEMA`,
`REFERENCED_TABLE_NAME`,
`REFERENCED_COLUMN_NAME`
FROM
information_schema.KEY_COLUMN_USAGE
WHERE
`CONSTRAINT_SCHEMA` LIKE checked_database_name AND
`TABLE_NAME` LIKE checked_table_name AND
`REFERENCED_TABLE_SCHEMA` IS NOT NULL;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
IF temporary_result_table = 'N' THEN
DROP TEMPORARY TABLE IF EXISTS INVALID_FOREIGN_KEYS;
DROP TABLE IF EXISTS INVALID_FOREIGN_KEYS;
CREATE TABLE INVALID_FOREIGN_KEYS(
`TABLE_SCHEMA` VARCHAR(64),
`TABLE_NAME` VARCHAR(64),
`COLUMN_NAME` VARCHAR(64),
`CONSTRAINT_NAME` VARCHAR(64),
`REFERENCED_TABLE_SCHEMA` VARCHAR(64),
`REFERENCED_TABLE_NAME` VARCHAR(64),
`REFERENCED_COLUMN_NAME` VARCHAR(64),
`INVALID_KEY_COUNT` INT,
`INVALID_KEY_SQL` VARCHAR(1024)
);
ELSEIF temporary_result_table = 'Y' THEN
DROP TEMPORARY TABLE IF EXISTS INVALID_FOREIGN_KEYS;
DROP TABLE IF EXISTS INVALID_FOREIGN_KEYS;
CREATE TEMPORARY TABLE INVALID_FOREIGN_KEYS(
`TABLE_SCHEMA` VARCHAR(64),
`TABLE_NAME` VARCHAR(64),
`COLUMN_NAME` VARCHAR(64),
`CONSTRAINT_NAME` VARCHAR(64),
`REFERENCED_TABLE_SCHEMA` VARCHAR(64),
`REFERENCED_TABLE_NAME` VARCHAR(64),
`REFERENCED_COLUMN_NAME` VARCHAR(64),
`INVALID_KEY_COUNT` INT,
`INVALID_KEY_SQL` VARCHAR(1024)
);
END IF;
OPEN foreign_key_cursor;
foreign_key_cursor_loop: LOOP
FETCH foreign_key_cursor INTO
TABLE_SCHEMA_VAR,
TABLE_NAME_VAR,
COLUMN_NAME_VAR,
CONSTRAINT_NAME_VAR,
REFERENCED_TABLE_SCHEMA_VAR,
REFERENCED_TABLE_NAME_VAR,
REFERENCED_COLUMN_NAME_VAR;
IF done THEN
LEAVE foreign_key_cursor_loop;
END IF;
SET @from_part = CONCAT('FROM ', '`', TABLE_SCHEMA_VAR, '`.`', TABLE_NAME_VAR, '`', ' AS REFERRING ',
'LEFT JOIN `', REFERENCED_TABLE_SCHEMA_VAR, '`.`', REFERENCED_TABLE_NAME_VAR, '`', ' AS REFERRED ',
'ON (REFERRING', '.`', COLUMN_NAME_VAR, '`', ' = ', 'REFERRED', '.`', REFERENCED_COLUMN_NAME_VAR, '`', ') ',
'WHERE REFERRING', '.`', COLUMN_NAME_VAR, '`', ' IS NOT NULL ',
'AND REFERRED', '.`', REFERENCED_COLUMN_NAME_VAR, '`', ' IS NULL');
SET @full_query = CONCAT('SELECT COUNT(*) ', @from_part, ' INTO @invalid_key_count;');
PREPARE stmt FROM @full_query;
EXECUTE stmt;
IF @invalid_key_count > 0 THEN
INSERT INTO
INVALID_FOREIGN_KEYS
SET
`TABLE_SCHEMA` = TABLE_SCHEMA_VAR,
`TABLE_NAME` = TABLE_NAME_VAR,
`COLUMN_NAME` = COLUMN_NAME_VAR,
`CONSTRAINT_NAME` = CONSTRAINT_NAME_VAR,
`REFERENCED_TABLE_SCHEMA` = REFERENCED_TABLE_SCHEMA_VAR,
`REFERENCED_TABLE_NAME` = REFERENCED_TABLE_NAME_VAR,
`REFERENCED_COLUMN_NAME` = REFERENCED_COLUMN_NAME_VAR,
`INVALID_KEY_COUNT` = @invalid_key_count,
`INVALID_KEY_SQL` = CONCAT('SELECT ',
'REFERRING.', '`', COLUMN_NAME_VAR, '` ', 'AS "Invalid: ', COLUMN_NAME_VAR, '", ',
'REFERRING.* ',
@from_part, ';');
END IF;
DEALLOCATE PREPARE stmt;
END LOOP foreign_key_cursor_loop;
END$$
DELIMITER ;
CALL ANALYZE_INVALID_FOREIGN_KEYS('%', '%', 'Y');
DROP PROCEDURE IF EXISTS ANALYZE_INVALID_FOREIGN_KEYS;
SELECT * FROM INVALID_FOREIGN_KEYS;
您可以使用此存储过程检查所有数据库中是否存在无效外键。
结果将加载到INVALID_FOREIGN_KEYS
表中。
参数ANALYZE_INVALID_FOREIGN_KEYS
:
结果是否是临时的。它可以是:'Y'
,'N'
,NULL
。
'Y'
ANALYZE_INVALID_FOREIGN_KEYS
结果表将是临时表。
其他会话不会显示临时表。
您可以与临时结果表并行执行多个ANALYZE_INVALID_FOREIGN_KEYS(...)
存储过程。'N'
,然后从其他会话执行SELECT * FROM INVALID_FOREIGN_KEYS;
。您必须使用NULL
来跳过事务中的结果表创建,因为MySQL在CREATE TABLE ...
和DROP TABLE ...
的事务中执行隐式提交,因此创建结果表会导致交易中的问题。在这种情况下,您必须自己从BEGIN; COMMIT/ROLLBACK;
块:
CREATE TABLE INVALID_FOREIGN_KEYS(
`TABLE_SCHEMA` VARCHAR(64),
`TABLE_NAME` VARCHAR(64),
`COLUMN_NAME` VARCHAR(64),
`CONSTRAINT_NAME` VARCHAR(64),
`REFERENCED_TABLE_SCHEMA` VARCHAR(64),
`REFERENCED_TABLE_NAME` VARCHAR(64),
`REFERENCED_COLUMN_NAME` VARCHAR(64),
`INVALID_KEY_COUNT` INT,
`INVALID_KEY_SQL` VARCHAR(1024)
);
访问有关隐式提交的MySQL站点:http://dev.mysql.com/doc/refman/5.6/en/implicit-commit.html
INVALID_FOREIGN_KEYS
行将仅包含无效数据库,表,列的名称。但是,如果有INVALID_KEY_SQL
INVALID_FOREIGN_KEYS
列的{{1}}列,则可以看到无效的引用行。
如果引用列(也就是外部索引)和引用列(通常是主键)上有索引,则此存储过程将非常快。
答案 1 :(得分:16)
感谢您的回答 - 这是一个非常方便的工具。这是一个稍微修改过程的版本,在输出表中包含SQL以删除带有无效键的键 - 对于确认这些行只是来自丢失/禁用的孤立删除级联规则的情况(而不是来自主要的孤儿)的情况很方便关键变化或其他更复杂的案例)。
DELIMITER $$
DROP PROCEDURE IF EXISTS ANALYZE_INVALID_FOREIGN_KEYS$$
CREATE
PROCEDURE `ANALYZE_INVALID_FOREIGN_KEYS`(
checked_database_name VARCHAR(64),
checked_table_name VARCHAR(64),
temporary_result_table ENUM('Y', 'N'))
LANGUAGE SQL
NOT DETERMINISTIC
READS SQL DATA
BEGIN
DECLARE TABLE_SCHEMA_VAR VARCHAR(64);
DECLARE TABLE_NAME_VAR VARCHAR(64);
DECLARE COLUMN_NAME_VAR VARCHAR(64);
DECLARE CONSTRAINT_NAME_VAR VARCHAR(64);
DECLARE REFERENCED_TABLE_SCHEMA_VAR VARCHAR(64);
DECLARE REFERENCED_TABLE_NAME_VAR VARCHAR(64);
DECLARE REFERENCED_COLUMN_NAME_VAR VARCHAR(64);
DECLARE KEYS_SQL_VAR VARCHAR(1024);
DECLARE done INT DEFAULT 0;
DECLARE foreign_key_cursor CURSOR FOR
SELECT
`TABLE_SCHEMA`,
`TABLE_NAME`,
`COLUMN_NAME`,
`CONSTRAINT_NAME`,
`REFERENCED_TABLE_SCHEMA`,
`REFERENCED_TABLE_NAME`,
`REFERENCED_COLUMN_NAME`
FROM
information_schema.KEY_COLUMN_USAGE
WHERE
`CONSTRAINT_SCHEMA` LIKE checked_database_name AND
`TABLE_NAME` LIKE checked_table_name AND
`REFERENCED_TABLE_SCHEMA` IS NOT NULL;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
IF temporary_result_table = 'N' THEN
DROP TEMPORARY TABLE IF EXISTS INVALID_FOREIGN_KEYS;
DROP TABLE IF EXISTS INVALID_FOREIGN_KEYS;
CREATE TABLE INVALID_FOREIGN_KEYS(
`TABLE_SCHEMA` VARCHAR(64),
`TABLE_NAME` VARCHAR(64),
`COLUMN_NAME` VARCHAR(64),
`CONSTRAINT_NAME` VARCHAR(64),
`REFERENCED_TABLE_SCHEMA` VARCHAR(64),
`REFERENCED_TABLE_NAME` VARCHAR(64),
`REFERENCED_COLUMN_NAME` VARCHAR(64),
`INVALID_KEY_COUNT` INT,
`INVALID_KEY_SQL` VARCHAR(1024),
`INVALID_KEY_DELETE_SQL` VARCHAR(1024)
);
ELSEIF temporary_result_table = 'Y' THEN
DROP TEMPORARY TABLE IF EXISTS INVALID_FOREIGN_KEYS;
DROP TABLE IF EXISTS INVALID_FOREIGN_KEYS;
CREATE TEMPORARY TABLE INVALID_FOREIGN_KEYS(
`TABLE_SCHEMA` VARCHAR(64),
`TABLE_NAME` VARCHAR(64),
`COLUMN_NAME` VARCHAR(64),
`CONSTRAINT_NAME` VARCHAR(64),
`REFERENCED_TABLE_SCHEMA` VARCHAR(64),
`REFERENCED_TABLE_NAME` VARCHAR(64),
`REFERENCED_COLUMN_NAME` VARCHAR(64),
`INVALID_KEY_COUNT` INT,
`INVALID_KEY_SQL` VARCHAR(1024),
`INVALID_KEY_DELETE_SQL` VARCHAR(1024)
);
END IF;
OPEN foreign_key_cursor;
foreign_key_cursor_loop: LOOP
FETCH foreign_key_cursor INTO
TABLE_SCHEMA_VAR,
TABLE_NAME_VAR,
COLUMN_NAME_VAR,
CONSTRAINT_NAME_VAR,
REFERENCED_TABLE_SCHEMA_VAR,
REFERENCED_TABLE_NAME_VAR,
REFERENCED_COLUMN_NAME_VAR;
IF done THEN
LEAVE foreign_key_cursor_loop;
END IF;
SET @from_part = CONCAT('FROM ', '`', TABLE_SCHEMA_VAR, '`.`', TABLE_NAME_VAR, '`', ' AS REFERRING ',
'LEFT JOIN `', REFERENCED_TABLE_SCHEMA_VAR, '`.`', REFERENCED_TABLE_NAME_VAR, '`', ' AS REFERRED ',
'ON (REFERRING', '.`', COLUMN_NAME_VAR, '`', ' = ', 'REFERRED', '.`', REFERENCED_COLUMN_NAME_VAR, '`', ') ',
'WHERE REFERRING', '.`', COLUMN_NAME_VAR, '`', ' IS NOT NULL ',
'AND REFERRED', '.`', REFERENCED_COLUMN_NAME_VAR, '`', ' IS NULL');
SET @full_query = CONCAT('SELECT COUNT(*) ', @from_part, ' INTO @invalid_key_count;');
PREPARE stmt FROM @full_query;
EXECUTE stmt;
IF @invalid_key_count > 0 THEN
INSERT INTO
INVALID_FOREIGN_KEYS
SET
`TABLE_SCHEMA` = TABLE_SCHEMA_VAR,
`TABLE_NAME` = TABLE_NAME_VAR,
`COLUMN_NAME` = COLUMN_NAME_VAR,
`CONSTRAINT_NAME` = CONSTRAINT_NAME_VAR,
`REFERENCED_TABLE_SCHEMA` = REFERENCED_TABLE_SCHEMA_VAR,
`REFERENCED_TABLE_NAME` = REFERENCED_TABLE_NAME_VAR,
`REFERENCED_COLUMN_NAME` = REFERENCED_COLUMN_NAME_VAR,
`INVALID_KEY_COUNT` = @invalid_key_count,
`INVALID_KEY_SQL` = CONCAT('SELECT ',
'REFERRING.', '`', COLUMN_NAME_VAR, '` ', 'AS "Invalid: ', COLUMN_NAME_VAR, '", ',
'REFERRING.* ',
@from_part, ';'),
`INVALID_KEY_DELETE_SQL` = CONCAT('DELETE ', '`', TABLE_SCHEMA_VAR, '`.`', TABLE_NAME_VAR, '` ',
'FROM ', '`', TABLE_SCHEMA_VAR, '`.`', TABLE_NAME_VAR, '`', ' ',
'LEFT JOIN `', REFERENCED_TABLE_SCHEMA_VAR, '`.`', REFERENCED_TABLE_NAME_VAR, '`', ' ',
'ON (', '`', TABLE_SCHEMA_VAR, '`.`', TABLE_NAME_VAR, '`', '.`', COLUMN_NAME_VAR, '`', ' = ', '`', REFERENCED_TABLE_SCHEMA_VAR, '`.`', REFERENCED_TABLE_NAME_VAR, '`', '.`', REFERENCED_COLUMN_NAME_VAR, '`', ') ',
'WHERE ', '`', TABLE_SCHEMA_VAR, '`.`', TABLE_NAME_VAR, '`', '.`', COLUMN_NAME_VAR, '`', ' IS NOT NULL ',
'AND ', '`', REFERENCED_TABLE_SCHEMA_VAR, '`.`', REFERENCED_TABLE_NAME_VAR, '`', '.`', REFERENCED_COLUMN_NAME_VAR, '`', ' IS NULL', ';');
END IF;
DEALLOCATE PREPARE stmt;
END LOOP foreign_key_cursor_loop;
END$$
DELIMITER ;
CALL ANALYZE_INVALID_FOREIGN_KEYS('%', '%', 'Y');
DROP PROCEDURE IF EXISTS ANALYZE_INVALID_FOREIGN_KEYS;
SELECT * FROM INVALID_FOREIGN_KEYS;
答案 2 :(得分:1)
没有工具,可以做到这一点。但是你可以编写一个脚本,它将遍历所有表,删除并重新创建外键约束。在娱乐方面,如果出现问题就会出错。
答案 3 :(得分:1)
同样的检查但是对于无效的UNIQUE键分析:
- > 小错误/功能:它还会报告重复的空值。 (虽然mysql允许重复的空值)。
DELIMITER $$
DROP PROCEDURE IF EXISTS ANALYZE_INVALID_UNIQUE_KEYS$$
CREATE
PROCEDURE `ANALYZE_INVALID_UNIQUE_KEYS`(
checked_database_name VARCHAR(64),
checked_table_name VARCHAR(64))
LANGUAGE SQL
NOT DETERMINISTIC
READS SQL DATA
BEGIN
DECLARE TABLE_SCHEMA_VAR VARCHAR(64);
DECLARE TABLE_NAME_VAR VARCHAR(64);
DECLARE COLUMN_NAMES_VAR VARCHAR(1000);
DECLARE CONSTRAINT_NAME_VAR VARCHAR(64);
DECLARE done INT DEFAULT 0;
DECLARE unique_key_cursor CURSOR FOR
select kcu.table_schema sch,
kcu.table_name tbl,
group_concat(kcu.column_name) colName,
kcu.constraint_name constName
from
information_schema.table_constraints tc
join
information_schema.key_column_usage kcu
on
kcu.constraint_name=tc.constraint_name
and kcu.constraint_schema=tc.constraint_schema
and kcu.table_name=tc.table_name
where
kcu.table_schema like checked_database_name
and kcu.table_name like checked_table_name
and tc.constraint_type="UNIQUE" group by sch, tbl, constName;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
DROP TEMPORARY TABLE IF EXISTS INVALID_UNIQUE_KEYS;
CREATE TEMPORARY TABLE INVALID_UNIQUE_KEYS(
`TABLE_SCHEMA` VARCHAR(64),
`TABLE_NAME` VARCHAR(64),
`COLUMN_NAMES` VARCHAR(1000),
`CONSTRAINT_NAME` VARCHAR(64),
`INVALID_KEY_COUNT` INT
);
OPEN unique_key_cursor;
unique_key_cursor_loop: LOOP
FETCH unique_key_cursor INTO
TABLE_SCHEMA_VAR,
TABLE_NAME_VAR,
COLUMN_NAMES_VAR,
CONSTRAINT_NAME_VAR;
IF done THEN
LEAVE unique_key_cursor_loop;
END IF;
SET @from_part = CONCAT('FROM (SELECT COUNT(*) counter FROM', '`', TABLE_SCHEMA_VAR, '`.`', TABLE_NAME_VAR, '`',
' GROUP BY ', COLUMN_NAMES_VAR , ') as s where s.counter > 1');
SET @full_query = CONCAT('SELECT COUNT(*) ', @from_part, ' INTO @invalid_key_count;');
PREPARE stmt FROM @full_query;
EXECUTE stmt;
IF @invalid_key_count > 0 THEN
INSERT INTO
INVALID_UNIQUE_KEYS
SET
`TABLE_SCHEMA` = TABLE_SCHEMA_VAR,
`TABLE_NAME` = TABLE_NAME_VAR,
`COLUMN_NAMES` = COLUMN_NAMES_VAR,
`CONSTRAINT_NAME` = CONSTRAINT_NAME_VAR,
`INVALID_KEY_COUNT` = @invalid_key_count;
END IF;
DEALLOCATE PREPARE stmt;
END LOOP unique_key_cursor_loop;
END$$
DELIMITER ;
CALL ANALYZE_INVALID_UNIQUE_KEYS('%', '%');
DROP PROCEDURE IF EXISTS ANALYZE_INVALID_UNIQUE_KEYS;
SELECT * FROM INVALID_UNIQUE_KEYS;
答案 4 :(得分:1)
我修改了脚本来处理多个外键列。
CREATE PROCEDURE `ANALYZE_INVALID_FOREIGN_KEYS`(IN `checked_database_name` VARCHAR(64), IN `checked_table_name` VARCHAR(64), IN `temporary_result_table` ENUM('Y', 'N'))
LANGUAGE SQL
NOT DETERMINISTIC
READS SQL DATA
SQL SECURITY DEFINER
COMMENT ''
BEGIN
DECLARE TABLE_SCHEMA_VAR VARCHAR(64);
DECLARE TABLE_NAME_VAR VARCHAR(64);
DECLARE COLUMN_NAME_VAR VARCHAR(64);
DECLARE CONSTRAINT_NAME_VAR VARCHAR(64);
DECLARE REFERENCED_TABLE_SCHEMA_VAR VARCHAR(64);
DECLARE REFERENCED_TABLE_NAME_VAR VARCHAR(64);
DECLARE REFERENCED_COLUMN_NAME_VAR VARCHAR(64);
DECLARE KEYS_SQL_VAR VARCHAR(1024);
DECLARE done INT DEFAULT 0;
DECLARE foreign_key_cursor CURSOR FOR
SELECT
`TABLE_SCHEMA`,
`TABLE_NAME`,
`COLUMN_NAME`,
`CONSTRAINT_NAME`,
`REFERENCED_TABLE_SCHEMA`,
`REFERENCED_TABLE_NAME`,
`REFERENCED_COLUMN_NAME`
FROM
information_schema.KEY_COLUMN_USAGE
WHERE
`CONSTRAINT_SCHEMA` LIKE checked_database_name AND
`TABLE_NAME` LIKE checked_table_name AND
`REFERENCED_TABLE_SCHEMA` IS NOT NULL;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
IF temporary_result_table = 'N' THEN
DROP TEMPORARY TABLE IF EXISTS INVALID_FOREIGN_KEYS;
DROP TABLE IF EXISTS INVALID_FOREIGN_KEYS;
CREATE TABLE INVALID_FOREIGN_KEYS(
`TABLE_SCHEMA` VARCHAR(64),
`TABLE_NAME` VARCHAR(64),
`COLUMN_NAME` VARCHAR(64),
`CONSTRAINT_NAME` VARCHAR(64),
`REFERENCED_TABLE_SCHEMA` VARCHAR(64),
`REFERENCED_TABLE_NAME` VARCHAR(64),
`REFERENCED_COLUMN_NAME` VARCHAR(64),
`INVALID_KEY_COUNT` INT,
`INVALID_KEY_SQL` VARCHAR(1024)
);
ELSEIF temporary_result_table = 'Y' THEN
DROP TEMPORARY TABLE IF EXISTS INVALID_FOREIGN_KEYS;
DROP TABLE IF EXISTS INVALID_FOREIGN_KEYS;
CREATE TEMPORARY TABLE INVALID_FOREIGN_KEYS(
`TABLE_SCHEMA` VARCHAR(64),
`TABLE_NAME` VARCHAR(64),
`COLUMN_NAME` VARCHAR(64),
`CONSTRAINT_NAME` VARCHAR(64),
`REFERENCED_TABLE_SCHEMA` VARCHAR(64),
`REFERENCED_TABLE_NAME` VARCHAR(64),
`REFERENCED_COLUMN_NAME` VARCHAR(64),
`INVALID_KEY_COUNT` INT,
`INVALID_KEY_SQL` VARCHAR(1024)
);
END IF;
SET @prev_name = '';
SET @from_part = '';
SET @where_part = '';
SET @where_nullable = '';
OPEN foreign_key_cursor;
foreign_key_cursor_loop: LOOP
FETCH foreign_key_cursor INTO
TABLE_SCHEMA_VAR,
TABLE_NAME_VAR,
COLUMN_NAME_VAR,
CONSTRAINT_NAME_VAR,
REFERENCED_TABLE_SCHEMA_VAR,
REFERENCED_TABLE_NAME_VAR,
REFERENCED_COLUMN_NAME_VAR;
IF done THEN
LEAVE foreign_key_cursor_loop;
END IF;
IF (@prev_name <> CONSTRAINT_NAME_VAR AND @from_part <> '' AND @where_part <> '') THEN
SET @full_query = CONCAT('SELECT COUNT(*) ', @from_part, ' WHERE (', @where_nullable , ') AND ', @from_where_part, 'WHERE ', @where_part, ') INTO @invalid_key_count;');
SET @invalid_query = CONCAT('SELECT * ', @from_part, ' WHERE (', @where_nullable , ') AND ', @from_where_part, 'WHERE ', @where_part, ')');
PREPARE stmt FROM @full_query;
EXECUTE stmt;
IF @invalid_key_count > 0 THEN
INSERT INTO
INVALID_FOREIGN_KEYS
SET
`TABLE_SCHEMA` = TABLE_SCHEMA_VAR,
`TABLE_NAME` = TABLE_NAME_VAR,
`COLUMN_NAME` = NULL,
`CONSTRAINT_NAME` = CONSTRAINT_NAME_VAR,
`REFERENCED_TABLE_SCHEMA` = REFERENCED_TABLE_SCHEMA_VAR,
`REFERENCED_TABLE_NAME` = REFERENCED_TABLE_NAME_VAR,
`REFERENCED_COLUMN_NAME` = NULL,
`INVALID_KEY_COUNT` = @invalid_key_count,
`INVALID_KEY_SQL` = @invalid_query;
END IF;
DEALLOCATE PREPARE stmt;
SET @where_part = '';
SET @where_nullable = '';
END IF;
IF (LENGTH(@where_part) > 0) THEN
SET @where_nullable = CONCAT(@where_nullable, ' OR ');
SET @where_part = CONCAT(@where_part, ' AND ');
ELSE
SET @from_part = CONCAT('FROM ', '`', TABLE_SCHEMA_VAR, '`.`',
TABLE_NAME_VAR, '`', ' AS REFERRING ');
SET @from_where_part = CONCAT('NOT EXISTS (SELECT * FROM `',
REFERENCED_TABLE_SCHEMA_VAR, '`.`', REFERENCED_TABLE_NAME_VAR, '`', ' AS REFERRED ');
END IF;
SET @where_nullable = CONCAT(@where_nullable, 'REFERRING.', COLUMN_NAME_VAR, ' IS NOT NULL');
SET @where_part = CONCAT(@where_part, 'REFERRING.', COLUMN_NAME_VAR, ' = ', 'REFERRED.', REFERENCED_COLUMN_NAME_VAR);
SET @prev_name = CONSTRAINT_NAME_VAR;
END LOOP foreign_key_cursor_loop;
IF (@where_part <> '' AND @from_part <> '') THEN
SET @full_query = CONCAT('SELECT COUNT(*) ', @from_part, ' WHERE (', @where_nullable , ') AND ', @from_where_part, 'WHERE ', @where_part, ') INTO @invalid_key_count;');
SET @invalid_query = CONCAT('SELECT * ', @from_part, ' WHERE (', @where_nullable , ') AND ', @from_where_part, 'WHERE ', @where_part, ')');
PREPARE stmt FROM @full_query;
EXECUTE stmt;
IF @invalid_key_count > 0 THEN
INSERT INTO
INVALID_FOREIGN_KEYS
SET
`TABLE_SCHEMA` = TABLE_SCHEMA_VAR,
`TABLE_NAME` = TABLE_NAME_VAR,
`COLUMN_NAME` = NULL,
`CONSTRAINT_NAME` = CONSTRAINT_NAME_VAR,
`REFERENCED_TABLE_SCHEMA` = REFERENCED_TABLE_SCHEMA_VAR,
`REFERENCED_TABLE_NAME` = REFERENCED_TABLE_NAME_VAR,
`REFERENCED_COLUMN_NAME` = NULL,
`INVALID_KEY_COUNT` = @invalid_key_count,
`INVALID_KEY_SQL` = @invalid_query;
END IF;
DEALLOCATE PREPARE stmt;
END IF;
END