Github user ueshin commented on a diff in the pull request: https://github.com/apache/spark/pull/22031#discussion_r208444793 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/higherOrderFunctions.scala --- @@ -442,3 +442,91 @@ case class ArrayAggregate( override def prettyName: String = "aggregate" } + +// scalastyle:off line.size.limit +@ExpressionDescription( + usage = "_FUNC_(left, right, func) - Merges the two given arrays, element-wise, into a single array using function. If one array is shorter, nulls are appended at the end to match the length of the longer array, before applying function.", + examples = """ + Examples: + > SELECT _FUNC_(array(1, 2, 3), array('a', 'b', 'c'), (x, y) -> (y, x)); + array(('a', 1), ('b', 3), ('c', 5)) + > SELECT _FUNC_(array(1, 2), array(3, 4), (x, y) -> x + y)); + array(4, 6) + > SELECT _FUNC_(array('a', 'b', 'c'), array('d', 'e', 'f'), (x, y) -> concat(x, y)); + array('ad', 'be', 'cf') + """, + since = "2.4.0") +// scalastyle:on line.size.limit +case class ArraysZipWith( + left: Expression, + right: Expression, + function: Expression) + extends HigherOrderFunction with CodegenFallback with ExpectsInputTypes { + + override def inputs: Seq[Expression] = List(left, right) + + override def functions: Seq[Expression] = List(function) + + def expectingFunctionType: AbstractDataType = AnyDataType --- End diff -- We don't need to define this?
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