Github user xunzhang commented on the issue:
https://github.com/apache/incubator-hawq/pull/955
BTW, since current implementation separate files into `self.files_update`,
`self.files_same_path `, `self.files_append`, it is very tricky and hard to
read/maintain. I suggest to add some unit test for some key functions for
readability.
Still I do not think delete all files and insert into ao_seg.# is a good
way, it brings complexity for some edge case. If we use this implementation, we
should add unit tests.
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