MaxGekk commented on a change in pull request #28328:
URL: https://github.com/apache/spark/pull/28328#discussion_r415525400
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala
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@@ -426,7 +426,10 @@ case class In(value: Expression, list: Seq[Expression])
extends Predicate {
* Optimized version of In clause, when all filter values of In clause are
* static.
*/
-case class InSet(child: Expression, hset: Set[Any]) extends UnaryExpression
with Predicate {
+case class InSet(
+ child: Expression,
+ hset: Set[Any],
+ hsetElemType: DataType) extends UnaryExpression with Predicate {
Review comment:
And `InSet.sql()` is called from `Dataset.select` _.named:
```scala
Project(untypedCols.map(_.named), logicalPlan)
```
The `named` method calls `toPrettySQL(expr)`:
```scala
case expr: Expression => Alias(expr, toPrettySQL(expr))()
```
The `toPrettySQL` method calls `sql`:
```scala
def toPrettySQL(e: Expression): String = usePrettyExpression(e).sql
```
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