Github user jinfengni commented on the pull request:
https://github.com/apache/drill/pull/286#issuecomment-161210859
@vkorukanti , I revised the patch based on our discussions.
The cache is enabled when impersonation is turned on. I also put another
commit which uses flat level cache for tables. I run the queries which
originally hit the long planning time/execution time, and seems things are what
I expected.
Please take a look at the PR. Thanks!
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