mysql下用户库比较多，都有统一的命名格式，希望在这些所有用户库执行脚本，更新数据，或者查询数据
可以采用以下存储过程实现
DROP PROCEDURE IF EXISTS `sp_execalldb`;
CREATE PROCEDURE `sp_execalldb`(p_sql varchar(4000),@p_dbname varchar(128))
BEGIN
drop temporary TABLE if EXISTS `temp_dblist`;
CREATE temporary TABLE `temp_dblist` (
`objid` tinyint NULL AUTO_INCREMENT ,
`dbname` varchar(50) NULL ,
PRIMARY KEY (`objid`)
)
;
insert into temp_dblist(dbname)
select SCHEMA_NAME from information_schema.SCHEMATA where SCHEMA_NAME like concat(@p_dbname,'%');
select count(*) into @rows from temp_dblist;
/*
call wfp.sp_execalldb('select max(EQ0722) from ?.wfpuser_t0404 ;')
*/
set @i=1;
WHILE @i <=@rows DO
-- select dbname from temp_dblist where objid=@i;
select REPLACE( p_sql,'?',dbname) into @tsql from temp_dblist where objid=@i ;
-- select @tsql;
prepare stmt from @tsql;
execute stmt;
set @i=@i+1;
END WHILE;
END;
调用示例
call sp_execalldb('select * from t','edb_a');