Josh Rosen 3c66ff727d [SPARK-9489] Remove unnecessary compatibility and requirements checks from Exchange ... While reviewing yhuai's patch for SPARK-2205 (#7773), I noticed that Exchange's `compatible` check may be incorrectly returning `false` in many cases. As far as I know, this is not actually a problem because the `compatible`, `meetsRequirements`, and `needsAnySort` checks are serving only as short-circuit performance optimizations that are not necessary for correctness. In order to reduce code complexity, I think that we should remove these checks and unconditionally rewrite the operator's children. This should be safe because we rewrite the tree in a single bottom-up pass. Author: Josh Rosen <joshrosen@databricks.com> Closes #7807 from JoshRosen/SPARK-9489 and squashes the following commits: 9d76ce9 [Josh Rosen] [SPARK-9489] Remove compatibleWith, meetsRequirements, and needsAnySort checks from Exchange		2015-07-30 17:38:48 -07:00
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main	[SPARK-9489] Remove unnecessary compatibility and requirements checks from Exchange	2015-07-30 17:38:48 -07:00
test	[SPARK-6319][SQL] Throw AnalysisException when using BinaryType on Join and Aggregate	2015-07-30 17:22:51 -07:00