1、建立測試表

CREATE TABLE `mysql_genarate` (
 `id` int(11) NOT NULL AUTO_INCREMENT,`uuid` varchar(50) DEFAULT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=5999001 DEFAULT CHARSET=utf8;

2、建立一個迴圈插入的儲存過程

CREATE DEFINER=`root`@`localhost` PROCEDURE `test_two1`( )
  BEGIN 
  DECLARE i INT DEFAULT 0;
  WHILE i < 3000 DO
    INSERT INTO mysql_genarate ( uuid ) VALUES( UUID( ) );
    SET i = i + 1;
  END WHILE;
END

呼叫測試call test_two1(),測試10000條資料耗時幾分鐘，如果是千萬級資料，這個速度將無法忍受。

3、優化儲存過程

使用批量插入的sql語句

CREATE DEFINER=`root`@`localhost` PROCEDURE `insertPro`( IN sum INT )
  BEGIN
  DECLARE count INT DEFAULT 0;
  DECLARE i INT DEFAULT 0;
  SET @exesql = concat( "insert into mysql_genarate(uuid) values" );
  SET @exedata = "";
  SET count = 0;
  SET i = 0;
  WHILE count < sum DO
    SET @exedata = concat( @exedata,",(UUID())" );
    SET count = count + 1;
    SET i = i + 1;
    IF i % 1000 = 0 THEN
      SET @exedata = SUBSTRING( @exedata,2 );
      SET @exesql = concat( "insert into mysql_genarate(uuid) values ",@exedata );
      PREPARE stmt FROM @exesql;
      EXECUTE stmt;
      DEALLOCATE PREPARE stmt;
      SET @exedata = "";
    END IF;
  END WHILE;
  IF length( @exedata ) > 0 THEN
    SET @exedata = SUBSTRING( @exedata,2 );
    SET @exesql = concat( "insert into mysql_genarate(uuid) values ",@exedata );
    PREPARE stmt FROM @exesql;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
  END IF;
END

呼叫 call insertPro(10000) ，耗時零點幾秒，這個速度可以接受。

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