HyukjinKwon commented on a change in pull request #35534:
URL: https://github.com/apache/spark/pull/35534#discussion_r809708015
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Expression.scala
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@@ -388,29 +395,13 @@ trait RuntimeReplaceable extends UnaryExpression with
Unevaluable {
* with other databases. For example, we use this to support every, any/some
aggregates by rewriting
* them with Min and Max respectively.
*/
-trait UnevaluableAggregate extends DeclarativeAggregate {
-
- override def nullable: Boolean = true
-
- override lazy val aggBufferAttributes =
- throw QueryExecutionErrors.evaluateUnevaluableAggregateUnsupportedError(
- "aggBufferAttributes", this)
-
- override lazy val initialValues: Seq[Expression] =
- throw QueryExecutionErrors.evaluateUnevaluableAggregateUnsupportedError(
- "initialValues", this)
-
- override lazy val updateExpressions: Seq[Expression] =
- throw QueryExecutionErrors.evaluateUnevaluableAggregateUnsupportedError(
- "updateExpressions", this)
-
- override lazy val mergeExpressions: Seq[Expression] =
- throw QueryExecutionErrors.evaluateUnevaluableAggregateUnsupportedError(
- "mergeExpressions", this)
-
- override lazy val evaluateExpression: Expression =
- throw QueryExecutionErrors.evaluateUnevaluableAggregateUnsupportedError(
- "evaluateExpression", this)
+abstract class RuntimeReplaceableAggregate extends AggregateFunction with
RuntimeReplaceable {
Review comment:
Actually I think we can make this as a trait w/ switching
`AggregateFunction` to a trait.
```diff
-abstract class AggregateFunction extends Expression {
+trait AggregateFunction extends Expression {
```
this at least compiles fine but I would prefer to do it separately. I will
follow up after this got merged.
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