GitHub user sirpkt opened a pull request:
https://github.com/apache/tajo/pull/315
TAJO-1265: min(), max() does not handle null properly
min() and max() handle null value separately from non-null values.
It computes min() or max() among non-null values first.
If no non-null value exists, they return null value.
Implementation style of min() and max() is also changed that
there are abstract classes of Min and Max common for all the data types
and only type specific methods are implemented for each type.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sirpkt/tajo TAJO-1265
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/tajo/pull/315.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 #315
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commit 46c5dd47deac696b19536ee5bb78667006bad8a5
Author: sirpkt <[email protected]>
Date: 2014-12-22T05:26:04Z
TAJO-1265: min(), max() does not handle null properly
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