Github user EntilZha commented on a diff in the pull request:
https://github.com/apache/spark/pull/7580#discussion_r35239410
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
---
@@ -35,3 +37,57 @@ case class Size(child: Expression) extends
UnaryExpression with ExpectsInputType
nullSafeCodeGen(ctx, ev, c => s"${ev.primitive} = ($c).size();")
}
}
+
+case class ArrayContains(left: Expression, right: Expression) extends
BinaryExpression {
+ override def dataType: DataType = BooleanType
+
+ override def checkInputDataTypes(): TypeCheckResult = {
+ if (!left.dataType.isInstanceOf[ArrayType]) {
+ TypeCheckResult.TypeCheckFailure(
+ s"type of first input must be an array, not
${left.dataType.simpleString}")
+ } else if (left.dataType.asInstanceOf[ArrayType].elementType !=
right.dataType) {
+ TypeCheckResult.TypeCheckFailure(
+ s"type of value must match array type " +
+
s"${left.dataType.asInstanceOf[ArrayType].elementType.simpleString}, not "+
+ s"${right.dataType.simpleString}")
+ } else {
+ TypeCheckResult.TypeCheckSuccess
+ }
+ }
+
+ override def eval(input: InternalRow): Boolean = {
--- End diff --
On that note, there isn't any documentation for `nullable`. Am I correct in
assuming that if `nullable` is `false`, then the expression cannot return
`null`? Can I add a comment with this if its correct?
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