Github user xuanyuanking commented on a diff in the pull request: https://github.com/apache/spark/pull/22326#discussion_r215876606 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala --- @@ -1202,15 +1222,50 @@ object PushPredicateThroughJoin extends Rule[LogicalPlan] with PredicateHelper { split(joinCondition.map(splitConjunctivePredicates).getOrElse(Nil), left, right) joinType match { - case _: InnerLike | LeftSemi => + case LeftSemi => // push down the single side only join filter for both sides sub queries val newLeft = leftJoinConditions. reduceLeftOption(And).map(Filter(_, left)).getOrElse(left) val newRight = rightJoinConditions. reduceLeftOption(And).map(Filter(_, right)).getOrElse(right) - val newJoinCond = commonJoinCondition.reduceLeftOption(And) + val (newJoinConditions, others) = + commonJoinCondition.partition(canEvaluateWithinJoin) + val newJoinCond = newJoinConditions.reduceLeftOption(And) + // need to add cross join when unevaluable condition exists + val newJoinType = if (others.nonEmpty) { + tryToGetCrossType(commonJoinCondition, j) + } else { + joinType + } - Join(newLeft, newRight, joinType, newJoinCond) + val join = Join(newLeft, newRight, newJoinType, newJoinCond) + if (others.nonEmpty) { + Project(newLeft.output.map(_.toAttribute), Filter(others.reduceLeft(And), join)) + } else { + join + } + case _: InnerLike => + // push down the single side only join filter for both sides sub queries + val newLeft = leftJoinConditions. --- End diff -- No problem, done in 87440b0.
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