使用临时表替换游标：提高效率

CREATE DEFINER=`root`@`%` PROCEDURE `debug`(IN `beginTime` int, IN `checkTime` int) 

BEGIN
    DECLARE t_id VARCHAR(64) DEFAULT '';
    DECLARE t_item TINYINT DEFAULT 0;
    DECLARE t_result VARCHAR(8192) DEFAULT '';

    DECLARE maxCnt INT DEFAULT 0;
    DECLARE i INT DEFAULT 0;

    DROP TABLE IF EXISTS Gather_Data_Tmp;
    CREATE TEMPORARY TABLE Gather_Data_Tmp(
        `Tmp_Id` INT UNSIGNED  NOT NULL AUTO_INCREMENT,
        `Asset_Id` VARCHAR(16)  NOT NULL,
        `Check_Item` TINYINT(1) NOT  NULL,
        `Check_Result` VARCHAR(8192) NOT NULL,
        PRIMARY KEY (`Tmp_Id`)
    )ENGINE=MyISAM DEFAULT CHARSET=utf8;

    SET @tSql = CONCAT('INSERT INTO Gather_Data_Tmp (`Asset_Id`, `Check_Item`, `Check_Result`)
                                            SELECT Asset_Id, Check_Item, Check_Result
                                            FROM IDC_Gather_Info
                                            WHERE Check_Time > ',beginTime,' AND Check_Time <= ',checkTime);
    PREPARE gatherData FROM @tSql;
    EXECUTE gatherData;

    SELECT MIN(`Tmp_Id`) INTO i FROM Gather_Data_Tmp;
    SELECT MAX(`Tmp_Id`) INTO maxCnt FROM Gather_Data_Tmp;

    WHILE i <= maxCnt DO
        SELECT Asset_Id, Check_Item, Check_Result INTO t_id, t_item, t_result FROM Gather_Data_Tmp WHERE Tmp_Id = i;
        SET i = i + 1;
    END WHILE;
END