GitHub user sirpkt opened a pull request:
https://github.com/apache/tajo/pull/327
Tajo-1275: Optimizer pushs down non-equi filter as theta join qualifier
This patch prevents non-equi filter condition becomes join qualifier of
child nodes.
It can avoid theta join is created as a result of filter push down.
in FilterPushDownRule.java, visitJoin() additionally checks all the join
qualifier candidates from pushing down filters whether it is non-equi join
qualifier or not.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sirpkt/tajo TAJO-1275
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/tajo/pull/327.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #327
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commit 8915b4b598fcb82ceba7ec722b1a422b8ad29f55
Author: sirpkt <[email protected]>
Date: 2014-12-31T08:22:52Z
Filter push down is changed not to push down theta join condition
commit 376bd194c51a23d407cc0161b7c9c9dae6f36714
Author: sirpkt <[email protected]>
Date: 2015-01-02T02:07:38Z
add test cases for inner, left outer, right outer joins
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