[SPARK-20175][SQL] Exists should not be evaluated in Join operator#17491

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viirya wants to merge 4 commits intoapache:masterfrom

viirya:dont-push-exists-to-join

Commits on Mar 31, 2017

Exists should not be evaluated in Join operator too.
viirya
committed

Commits on Apr 1, 2017

Add a local limit operator to limit data scan.
viirya
committed

Commits on Apr 11, 2017

Merge remote-tracking branch 'upstream/master' into dont-push-exists-to-join
viirya
committed
Revert optimization for Exists subquery without correlated references.
viirya
committed