GitHub user cloud-fan opened a pull request:
https://github.com/apache/spark/pull/19424
[SPARK-22197][SQL] push down operators to data source before planning
## What changes were proposed in this pull request?
As we discussed in
https://github.com/apache/spark/pull/19136#discussion_r137023744 , we should
push down operators to data source before planning, so that data source can
report statistics more accurate.
## How was this patch tested?
existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/cloud-fan/spark follow
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19424.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 #19424
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commit 571fad95c2dac6f70840da9c68cfb1be1358ecaf
Author: Wenchen Fan <[email protected]>
Date: 2017-09-27T12:50:15Z
improve documents and minor clean up
commit 75457f608b9068ad1b3b3eb129f14d4e1b4ed946
Author: Wenchen Fan <[email protected]>
Date: 2017-10-04T01:37:25Z
push down operators to data source before planning
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