GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/9940
[SPARK-11955][SQL] Mark one side fields in merging schema for safely
pushdowning filters in Parquet
JIRA: https://issues.apache.org/jira/browse/SPARK-11955
Currently we simply skip pushdowning filters in parquet if we enable schema
merging.
However, we can actually mark one side fields in merging schema for safely
pushdowning filters in parquet.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/viirya/spark-1 safe-pushdown-parquet-filters
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9940.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 #9940
----
commit e24529d0e1fc61aff5dbd331444b20dfc4d09c09
Author: Liang-Chi Hsieh <[email protected]>
Date: 2015-11-24T17:14:59Z
Mark one side fields in merging schema for safely pushdowning filters in
parquet.
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