Wang Gengliang b72b8521d9 [SPARK-21222] Move elimination of Distinct clause from analyzer to optimizer ... ## What changes were proposed in this pull request? Move elimination of Distinct clause from analyzer to optimizer Distinct clause is useless after MAX/MIN clause. For example, "Select MAX(distinct a) FROM src from" is equivalent of "Select MAX(a) FROM src from" However, this optimization is implemented in analyzer. It should be in optimizer. ## How was this patch tested? Unit test gatorsmile cloud-fan Please review http://spark.apache.org/contributing.html before opening a pull request. Author: Wang Gengliang <ltnwgl@gmail.com> Closes #18429 from gengliangwang/distinct_opt.		2017-06-29 08:47:31 +08:00
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src	[SPARK-21222] Move elimination of Distinct clause from analyzer to optimizer	2017-06-29 08:47:31 +08:00
pom.xml	[MINOR][DOC] modified issue link and updated status	2017-06-21 15:34:10 +01:00