[SPARK-18609][SQL]Fix when CTE with Join between two table with same column name#16255

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windpiger wants to merge 3 commits intoapache:masterfrom

windpiger:CETwithJoinBetweenSameColumnTableExcep

Commits on Dec 12, 2016

[SPARK-18609][SQL][WIP]Fix when CTE with Join between two table with same column name
thisissj
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Commits on Dec 13, 2016

fix when alias's child is not a NamedExpression
windpiger
committed

Commits on Dec 14, 2016

remove a relation condition in RemoveAliasOnlyProject
windpiger
committed