简单的sql语句分解，通过存储过程。

DELIMITER $$

DROP PROCEDURE IF EXISTS `simpleSqlAnalyze`$$

CREATE PROCEDURE `simpleSqlAnalyze`( $sqlString NVARCHAR(2000), OUT $tableString NVARCHAR(2000), OUT $fieldString NVARCHAR(2000), OUT $whereString NVARCHAR(2000), OUT $orderString NVARCHAR(2000) ) SQL SECURITY INVOKER BEGIN SET @sql1=$sqlString; SET @sql2=TRIM(@sql1); SET @fromNum=LOCATE(' from ',@sql2); SET @field =SUBSTRING(@sql2,7,@fromNum-7); SET @sql3= SUBSTRING(@sql2,@fromNum+6); SET @byNum= LOCATE(' by ',@sql3); IF @byNum>0 THEN BEGIN SET @sql4=LEFT(@sql3,@byNum-6); SET @byfd=SUBSTRING(@sql3,@byNum-6); END; ELSE BEGIN SET @sql4=@sql3; SET @byfd=''; END; END IF;

SET @whereNum=LOCATE(' where ',@sql4);

IF @whereNum>0 THEN SET @tablefd=LEFT(@sql4,@whereNum); ELSE SET @tablefd=@sql4; END IF; SET @wherefd=SUBSTRING(@sql4,@whereNum); SET $tableString=@tablefd; SET $fieldString=@field; SET $whereString=@wherefd; SET $orderString=@byfd;

END$$

DELIMITER ;

#CALL simplesqlanalyze(' select f * from medialist join fd on sf=23 gro where 2w32 select from where group by dfsd ',@a,@b,@c,@d);