复合主建自增表结构，插入多行数据且未携带主键值时执行异常

[renliangyu857]

• I have searched the issues of this repository and believe that this is not a duplicate.

Ⅰ. Issue Description

Ⅱ. Describe what happened

If there is an exception, please attach the exception trace:

Just paste your stack trace here!

Ⅲ. Describe what you expected to happen

Ⅳ. How to reproduce it (as minimally and precisely as possible)

表结构：
CREATE TABLE t_multi_primary (
id1 int(11) NOT NULL AUTO_INCREMENT,
id2 int(11) NOT NULL,
a int(11) DEFAULT NULL,
b int(11) DEFAULT NULL,
PRIMARY KEY (id1,id2)
) ENGINE=InnoDB;
测试case语句：
insert into t_multi_primary(id1,id2,a,b) values(null,2,1,1),(null,3,2,2)
问题原因：

获取自增主键时，两行数据应该是两个自增主键值，但在复合主键下只获取到了一个

Ⅴ. Anything else we need to know?

Ⅵ. Environment:

• JDK version :
• Seata version:
• OS :
• Others:

[funky-eyes]

这个问题可能跟driver有关,无法返回多行pk,某些数据库的driver就有这个问题,还需要框架层去通过步长计算pk

[dreamskyvision]

Please assign me