mingmwang commented on PR #2172:
URL:
https://github.com/apache/arrow-datafusion/pull/2172#issuecomment-1091051845
Looks like in DataFusion, the logical Project node already support Alias. It
should be similar to SparkSQL's SubqueryAlias.
And we can also use it to represent a NamedStruct
````
pub struct Projection {
/// The list of expressions
pub expr: Vec<Expr>,
/// The incoming logical plan
pub input: Arc<LogicalPlan>,
/// The schema description of the output
pub schema: DFSchemaRef,
/// Projection output relation alias
pub alias: Option<String>,
}
````
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