jackwener commented on code in PR #4013:
URL: https://github.com/apache/arrow-datafusion/pull/4013#discussion_r1008713111
##########
datafusion/core/src/physical_plan/planner.rs:
##########
@@ -1013,7 +1013,10 @@ impl DefaultPhysicalPlanner {
LogicalPlan::TableScan(..) => {
self.create_initial_plan(input,
session_state).await
}
- _ => Err(DataFusionError::Plan("SubqueryAlias should
only wrap TableScan".to_string()))
+ LogicalPlan::Filter(..) => {
+ self.create_initial_plan(input,
session_state).await
+ }
+ _ => Err(DataFusionError::Plan("SubqueryAlias should
only wrap TableScan or Filter".to_string()))
Review Comment:
I may get your point. You hope to unify alias in the same place
Current, alias can exist two part.
- SubqueryAlias
- Projection Alias
This implementation is different from `Spark`
`Spark Subquery` don't include alias.
```scala
case class Subquery(child: LogicalPlan, correlated: Boolean) extends
OrderPreservingUnaryNode {
override def output: Seq[Attribute] = child.output
override protected def withNewChildInternal(newChild: LogicalPlan):
Subquery =
copy(child = newChild)
}
```
I think your thought is reasonable. We shouldn't put alias in multiple place.
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