版本号升级规则是不是有问题

[cuixg]

1.1.5、1.2.1、1.2.2
这三个release note中，分别都包含了behaviour changes，尤其是1.1.5关于group by / having中column name和alias的变更，是一个不会报错但是影响数据产出结果的变更，在我的理解里这种变更是一个完全不向下兼容的，要么放到1.2里面才发出来，要么直接给1.1.5改成1.2的tag。因为这个升级很多sql执行结果都错掉了。大家怎么看这个问题

[morningman]

This is a good suggestion!
We should add a switch for these kind of behavior changes, and we are also aware of this, so we add a switch group_by_and_having_use_alias_first in 1.2.2 to try fixing this issue.

The other behavior changes are for performance and stability issue, which is reasonable for me, personally.

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