[SPARK-11955][SQL] Mark optional fields in merging schema for safely pushdowning filters in Parquet#9940

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viirya wants to merge 12 commits intoapache:masterfrom

viirya:safe-pushdown-parquet-filters

Commits on Nov 24, 2015

Mark one side fields in merging schema for safely pushdowning filters in parquet.
viirya
committed

Commits on Nov 25, 2015

Fix test.
viirya
committed

Commits on Nov 29, 2015

Commits on Nov 30, 2015

Commits on Dec 5, 2015

Merge remote-tracking branch 'upstream/master' into safe-pushdown-parquet-filters
viirya
committed
Clear the temporary metadata before writing to Parquet file.
viirya
committed

Commits on Dec 6, 2015

Commits on Jan 27, 2016