[SPARK-24468][SQL] Handle negative scale when adjusting precision for decimal operations#21499

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mgaido91 wants to merge 2 commits intoapache:masterfrom mgaido91:SPARK-24468

+117-68

Commits on Jun 5, 2018

[SPARK-24468][SQL] Handle negative scale when adjusting precision for decimal operations
mgaido91
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Commits on Jun 7, 2018

add end-to-end test case for returning null
mgaido91
committed