Github user dongjinleekr commented on the issue:
https://github.com/apache/tajo/pull/1036
Oh, my mistake. I confused HCatalogStore and HiveCatalogStore.
Let's sum up. The following is the list of tickets that should be opened.
Some of them are from this discussion, and the others are what I found during
this work. (I think it is better to implement disabling unset timezone feature
on separate issue, not here.)
1. [Major] Move timezone property from KeyValue set and disable to unset
it. (Related: [TAJO-1185](https://issues.apache.org/jira/browse/TAJO-1185),
[TAJO-1241](https://issues.apache.org/jira/browse/TAJO-1241))
2. [Major, Umbrella] Implement missing HiveCatalogStore features.
3. [Trivial] Remove AlterTableNode#clone - it has been commented out.
If you have any opinion, don't hesitate to comment to me. If you merge and
close this request without any comments, I will regard it you accepted my
proposal. Thanks again for your guidance! :)
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