[SPARK-20730][SQL] Add an optimizer rule to combine nested Concat#17970
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maropu wants to merge 3 commits intoapache:masterfrom
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[SPARK-20730][SQL] Add an optimizer rule to combine nested Concat#17970maropu wants to merge 3 commits intoapache:masterfrom
maropu wants to merge 3 commits intoapache:masterfrom
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Commits on May 13, 2017
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Commits on May 14, 2017
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