pub fn normalize_out_expr_with_columns_map(
expr: Arc<dyn PhysicalExpr>,
columns_map: &HashMap<Column, Vec<Column>>
) -> Arc<dyn PhysicalExpr>Expand description
Normalize the output expressions based on Columns Map.
If there is a mapping in Columns Map, replace the Column in the output expressions with the 1st Column in the Columns Map. Otherwise, replace the Column with a place holder of UnKnownColumn