在MySQL中全库搜索指定字符串

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有时候，需要从整个MySQL库中搜索某一字符串,但却不知道在哪个表哪个字段，用下面的存储过程，So Easy.

 

DELIMITER //
DROP PROCEDURE IF EXISTS `proc_FindStrInAllDB`//
# CALL `proc_FindStrInAllDB` ('testdb','中');
CREATE PROCEDURE `proc_FindStrInAllDB` 
(
 IN p_dbname VARCHAR(128),
 IN p_finstr VARCHAR(128) 
)
BEGIN
 -- 需要定义接收游标数据的变量 
 DECLARE tmp_dbname VARCHAR(128);
 DECLARE tmp_tbname VARCHAR(128);
 DECLARE tmp_colname VARCHAR(128); 
 -- 遍历数据结束标志
 DECLARE done INT DEFAULT FALSE;
  
   
 -- 游标
 DECLARE cur_db_tb CURSOR 
 FOR 
 SELECT  
  #*,
  C.table_schema,C.table_name,C.COLUMN_NAME
 FROM 
  information_schema.`COLUMNS` C
  INNER JOIN information_schema.`TABLES` T ON C.`TABLE_NAME`=T.`TABLE_NAME` 
 WHERE
  T.`TABLE_TYPE`='BASE TABLE' 
 AND 
  (C.data_type LIKE '%char%' OR C.data_type LIKE '%text%')
 AND 
  (C.TABLE_SCHEMA=p_dbname OR IFNULL(p_dbname,'') ='') AND IFNULL(p_finstr,'')<>'';
  
 -- 将结束标志绑定到游标
 DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
 CREATE TEMPORARY TABLE IF NOT EXISTS rstb(dbname VARCHAR(128),tbname VARCHAR(128),colname VARCHAR(128),cnt INT); 
 -- 打开游标
 OPEN cur_db_tb;
   -- 开始循环
   read_loop: LOOP
   -- 提取游标里的数据，这里只有一个，多个的话也一样；
   FETCH cur_db_tb INTO  tmp_dbname,tmp_tbname,tmp_colname;
   -- 声明结束的时候
   IF done THEN
   LEAVE read_loop;
   END IF;
   -- 这里做你想做的循环的事件
   SET @sqlstr=CONCAT('select count(1) into @rn from ',tmp_dbname,'.',tmp_tbname,' where ',tmp_colname,' like ''%',p_finstr,'%''');
   
   PREPARE str FROM @sqlstr;  
   EXECUTE str;   
   DEALLOCATE PREPARE str;
   IF IFNULL(@rn,0)>0
    THEN
    INSERT INTO rstb VALUES(tmp_dbname,tmp_tbname,tmp_colname,@rn);
   END IF;

   END LOOP;
 -- 关闭游标
 CLOSE cur_db_tb;
 
 SELECT * FROM rstb;
 DROP TABLE rstb;
 
END
//
DELIMITER ;