数据库自增GeneratedKey的返回无效，已经确认不支持。

[xuminwlt]

Please answer these questions before submitting your issue. Thanks!

Which version of Sharding-Jdbc do you using?

1.5.0

Expected behavior

mysql自增id在Mybatis中能拿到

@options(useGeneratedKeys = true, keyProperty = "id" )
boolean add(User user);

Actual behavior

配置sjdbc的<rdb:generate-key-column column-name="id"/>意味着只能使用分布式id策略，无法满足现有需求，1.4.2一直可以的。

Steps to reproduce the behavior

INSERT INTO t_order ( user_id, status ) VALUES ( #{userId,jdbcType=INTEGER}, #{status,jdbcType=VARCHAR} )

Please provide the reproduce example codes (such as github link) if possible.

能够像1.4.2一样支持数据库自增id返回GeneratedKey策略，经过调试发现，GeneratedKey仅在配置分布式自增id才会生效。

[terrymanu]

fixed at 1.5.1