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Simplify coalesce expressions #35

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merged 2 commits into from
Jan 25, 2019

Commits on Jan 25, 2019

  1. Simplify coalesce expressions

    For coalesce expression like coalesce(colA, colA) will be simplified to colA and for expressions like coalesce('1', colA) will be simplified to '1'.
    Praveen2112 committed Jan 25, 2019
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  2. Flatten coalesce expressions

    Flatten coalesce(colA, coalesce(colB, colC)) to coalesce(colA, colB, colC).
    Praveen2112 committed Jan 25, 2019
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