Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20858#discussion_r177004054
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
---
@@ -287,3 +289,152 @@ case class ArrayContains(left: Expression, right:
Expression)
override def prettyName: String = "array_contains"
}
+
+/**
+ * Concatenates multiple arrays into one.
+ */
+@ExpressionDescription(
+ usage = "_FUNC_(expr, ...) - Concatenates multiple arrays into one.",
+ examples = """
+ Examples:
+ > SELECT _FUNC_(array(1, 2, 3), array(4, 5), array(6));
+ [1,2,3,4,5,6]
+ """)
+case class ConcatArrays(children: Seq[Expression]) extends Expression with
NullSafeEvaluation {
+
+ override def checkInputDataTypes(): TypeCheckResult = {
+ val arrayCheck = checkInputDataTypesAreArrays
+ if(arrayCheck.isFailure) arrayCheck
+ else TypeUtils.checkForSameTypeInputExpr(children.map(_.dataType),
s"function $prettyName")
+ }
+
+ private def checkInputDataTypesAreArrays(): TypeCheckResult =
--- End diff --
Can we just put this in `checkInputDataTypes`?
---
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
