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From koertkuipers <>
Subject [GitHub] spark issue #17660: [SPARK-20359][SQL] catch NPE in EliminateOuterJoin optim...
Date Tue, 18 Apr 2017 11:53:11 GMT
Github user koertkuipers commented on the issue:
    I see. let me check if making leftHasNonNullPredicate and
    rightHasNonNullPredicate lazy solves it then
    On Apr 17, 2017 23:44, "Wenchen Fan" <> wrote:
    > I think the root problem is, in EliminateOuterJoin.buildNewJoinType, we
    > always build leftHasNonNullPredicate and rightHasNonNullPredicate. If
    > it's left join, only rightHasNonNullPredicate is used, and when building
    > leftHasNonNullPredicate, we may pass null values to a UDF that is not
    > supposed to run on null values.
    > —
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