beliefer commented on code in PR #40563:
URL: https://github.com/apache/spark/pull/40563#discussion_r1152647435
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala:
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@@ -1400,120 +1400,24 @@ case class ArrayContains(left: Expression, right:
Expression)
copy(left = newLeft, right = newRight)
}
-// scalastyle:off line.size.limit
-@ExpressionDescription(
- usage = """
- _FUNC_(array, element) - Add the element at the beginning of the array
passed as first
- argument. Type of element should be the same as the type of the elements
of the array.
- Null element is also prepended to the array. But if the array passed is
NULL
- output is NULL
- """,
- examples = """
- Examples:
- > SELECT _FUNC_(array('b', 'd', 'c', 'a'), 'd');
- ["d","b","d","c","a"]
- > SELECT _FUNC_(array(1, 2, 3, null), null);
- [null,1,2,3,null]
- > SELECT _FUNC_(CAST(null as Array<Int>), 2);
- NULL
- """,
- group = "array_funcs",
- since = "3.5.0")
-case class ArrayPrepend(left: Expression, right: Expression)
- extends BinaryExpression
- with ImplicitCastInputTypes
- with ComplexTypeMergingExpression
- with QueryErrorsBase {
-
- override def nullable: Boolean = left.nullable
+trait InsertArrayOneSide extends RuntimeReplaceable
+ with ImplicitCastInputTypes with BinaryLike[Expression] with QueryErrorsBase
{
Review Comment:
`BinaryExpression` could be evaluated. In fact, the implementation of
`RuntimeReplaceable` could not be evaluated.
`ArrayInsert` already implemented the `ComplexTypeMergingExpression`.
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