改写的两个mysql存储过程，用于判断主键外键
由于所在的数据库没有系统自带的sp_pkeys,sp_fkeys，所以改写了如下：
sp_pkeys
CREATE PROCEDURE `testdb`.`sp_pkeys` (IN table_name varchar(50),IN table_owner varchar(50),IN table_qualifier varchar(50))
NOT DETERMINISTIC
begin
/**procedure body**/
select column_name from information_schema.columns where table_schema='testdb' and table_name=@table_name and column_key='PRI';
end;
SET @table_name='test';
CALL sp_pkeys(@table_name,null,null);
sp_fkeys
CREATE PROCEDURE `testdb`.`sp_fkeys` (IN pktb_name varchar(50),IN pkcolume_name varchar(50),IN pktb_owner varchar(50),IN pktb_qualifier varchar(50))
NOT DETERMINISTIC
CONTAINS SQL
begin
/**procedure body**/
select COLUMN_NAME from information_schema.KEY_COLUMN_USAGE where table_name = pktb_name and COLUMN_NAME=pkcolume_name and REFERENCED_COLUMN_NAME is not null;
end;
CALL sp_fkeys ('test',
'name',
null,
null)
other:
创建外键
alter table test add constraint FK_Id foreign key(Name) REFERENCES testfk(Name);
FK_Id 外键的名称
Name: test表中外键的字段名
后面那个Name:关联表的主键名
注意：如果test中存在name的值在testfk中没有会创建失败
删除外键
ALTER TABLE `test` DROP FOREIGN KEY `FK_ID`
另附 mysql 简单存储过程的写法：
#MYSQL不支持匿名块(ORACLE、POSTGRESQL8.5支持)，用SP
DELIMITER $$
DROP PROCEDURE IF EXISTS `golf`.`testsq` $$
CREATE PROCEDURE `testsq` ()
BEGIN
set @i=1;
while @i<1000
do
insert into Test(Id,UserName) values (@i,CONCAT('testname',@i));
set @i=@i+1;
END while ;
END $$
DELIMITER ;
--- end ---
