SQLSTR是别名，在MySQL5.7以上版本能通过，在5.0上提示unknow column ‘SQLSTR’错误，我不知道应该怎么修改（因为客户关系不能通过mysql版本）,请各位大神指点！
BEGIN
DECLARE sTYPE VARCHAR(20);
DROP TEMPORARY TABLE IF EXISTS temp_public_data;
CREATE TEMPORARY TABLE temp_public_data SELECT
DATE_FORMAT(FROM_UNIXTIME(n.inputtime),'%Y-%m-%d') as days,
DATE_FORMAT(FROM_UNIXTIME(n.inputtime),'%Y-%m') as months,
DATE_FORMAT(FROM_UNIXTIME(n.inputtime),'%Y') as years,
DATE_FORMAT(FROM_UNIXTIME(n.inputtime),'%u') as weeks,
count(n.id) as pubnum,n.username from v9_news as n
WHERE DATE_FORMAT(FROM_UNIXTIME(n.inputtime),'%Y-%m-%d') BETWEEN pDayBegin AND pDayEnd
GROUP BY days,n.username;
IF pType=1 THEN
SET sType = "years";
ELSEIF pType=2 THEN
SET sType = "months";
ELSEIF pType=3 THEN
SET sType = "weeks";
ELSEIF pType=5 THEN
SET sType = "days";
END IF;
SET @EE = "";
SELECT @EE:= CONCAT(@EE,',SUM(IF(username=\'',username,'\',pubnum,0)) AS \'',username,'\'') AS **SQLSTR** FROM (SELECT DISTINCT username FROM temp_public_data) A ORDER BY **LENGTH(SQLSTR)** DESC LIMIT 0,1;
SET @SQL = CONCAT('SELECT IFNULL(',sType,',\'TOTAL\') AS MONTH');
SET @SQL = CONCAT(@SQL,@EE);
SET @SQL = CONCAT(@SQL,',SUM(pubnum) as TOTAl ');
SET @SQL = CONCAT(@SQL,' FROM temp_public_data');
SET @SQL = CONCAT(@SQL,' GROUP BY ',sType,' WITH ROLLUP;');
#SELECT @SQL;
PREPARE stmt FROM @SQL;
EXECUTE stmt;
DROP TEMPORARY TABLE IF EXISTS temp_public_data;
END
