Github user ueshin commented on a diff in the pull request: https://github.com/apache/spark/pull/21028#discussion_r182688229 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala --- @@ -288,6 +288,114 @@ case class ArrayContains(left: Expression, right: Expression) override def prettyName: String = "array_contains" } +/** + * Checks if the two arrays contain at least one common element. + */ +@ExpressionDescription( + usage = "_FUNC_(a1, a2) - Returns true if a1 contains at least an element present also in a2.", + examples = """ + Examples: + > SELECT _FUNC_(array(1, 2, 3), array(3, 4, 5)); + true + """, since = "2.4.0") +case class ArraysOverlap(left: Expression, right: Expression) + extends BinaryExpression with ImplicitCastInputTypes { + + private lazy val elementType = inputTypes.head.asInstanceOf[ArrayType].elementType + + override def dataType: DataType = BooleanType + + override def inputTypes: Seq[AbstractDataType] = left.dataType match { + case la: ArrayType if la.sameType(right.dataType) => + Seq(la, la) + case _ => Seq.empty + } + + override def checkInputDataTypes(): TypeCheckResult = { + if (!left.dataType.isInstanceOf[ArrayType] || !right.dataType.isInstanceOf[ArrayType] || + !left.dataType.sameType(right.dataType)) { + TypeCheckResult.TypeCheckFailure("Arguments must be arrays with the same element type.") + } else { + TypeCheckResult.TypeCheckSuccess + } + } + + override def nullable: Boolean = { + left.nullable || right.nullable || left.dataType.asInstanceOf[ArrayType].containsNull || + right.dataType.asInstanceOf[ArrayType].containsNull + } + + override def nullSafeEval(a1: Any, a2: Any): Any = { + var hasNull = false + val arr1 = a1.asInstanceOf[ArrayData] + val arr2 = a2.asInstanceOf[ArrayData] + if (arr1.numElements() > 0) { + arr1.foreach(elementType, (_, v1) => + if (v1 == null) { + hasNull = true + } else { + arr2.foreach(elementType, (_, v2) => + if (v2 == null) { + hasNull = true + } else if (v1 == v2) { + return true + } + ) + } + ) + } else { --- End diff -- We can skip if the right is `containsNull == false`?
--- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org