GitHub user sujith71955 opened a pull request:
https://github.com/apache/incubator-carbondata/pull/202
[CARBONDATA-278] IS NULL and IS NOT NULL shall be push down to carbon
**Current design** : As per the current design IS NULL and IS NOT NULL
filter is been handled by spark layer
**Drawback** : Block/Blocklet level pruning will not be possible if the
filter is been processed by spark layer
**Proposed Improvement**: IS NULL and IS NOT NULL shall be push down to
carbon layer since carbon layer can process these filters faster using
block/block-let pruning , also while processing filters in executers carbon is
applying binary search for applying filter values.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/sujith71955/incubator-carbondata
master_filterOptimizations
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/incubator-carbondata/pull/202.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 #202
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commit b89510679237d12763bf99402ada60a675b6dfc2
Author: sujith71955 <[email protected]>
Date: 2016-09-27T11:21:03Z
[CARBONDATA-278] IS NULL and IS NOT NULL shall be push down to carbon layer
since carbon layer can process these filters faster using block/block-let
pruning ,
also while processing filters in executors carbon is applying binary
search for applying filter values.
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