GitHub user dbtsai opened a pull request:
https://github.com/apache/spark/pull/22573
[SPARK-25558][SQL] Pushdown predicates for nested fields in DataSource
Strategy
## What changes were proposed in this pull request?
This PR allows Spark to create predicates for nested fields, and it's a
building block to have Parquet and ORC to support the nested predicate pushdown.
## How was this patch tested?
Tests added
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dbtsai/spark dataSourcePredicate
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22573.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 #22573
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commit 2f21842d4676993d0d28abb6297796c672186f53
Author: DB Tsai <d_tsai@...>
Date: 2018-09-27T18:24:38Z
DataSourceStrategy
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