1、创建测试表
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、创建一个循环插入的存储过程
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
调用测试call test_two1(), 测试10000条数据耗时几分钟，如果是千万级数据，这个速度将无法忍受。
3、优化存储过程
使用批量插入的sql语句
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
调用 call insertPro(10000) ，耗时零点几秒，这个速度可以接受。
