beliefer commented on code in PR #38874:
URL: https://github.com/apache/spark/pull/38874#discussion_r1045729620
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala:
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@@ -4600,3 +4600,30 @@ case class ArrayExcept(left: Expression, right:
Expression) extends ArrayBinaryL
override protected def withNewChildrenInternal(
newLeft: Expression, newRight: Expression): ArrayExcept = copy(left =
newLeft, right = newRight)
}
+
+@ExpressionDescription(
+ usage = "_FUNC_(array) - Removes null values from the array.",
+ examples = """
+ Examples:
+ > SELECT _FUNC_(array(1, 2, 3, null));
+ [1,2,3]
+ """,
+ group = "array_funcs",
+ since = "3.4.0")
+case class ArrayCompact(child: Expression)
+ extends RuntimeReplaceable with UnaryLike[Expression] with ExpectsInputTypes
with NullIntolerant {
Review Comment:
Please try to use this method.
```
lazy val ArrayType(elementType, nullable) = child.dataType
lazy val lv = NamedLambdaVariable("arg", elementType, nullable)
lazy val function = f(lv)
lazy val lambda = LambdaFunction(function, Seq(lv))
```
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