feat(cube): Make apply_aliasing_projection_if_necessary public

Author: srh

datafusion/core/src/datasource/physical_plan/parquet/mod.rs

@@ -65,7 +65,6 @@ pub use row_filter::build_row_filter;
 pub use row_filter::can_expr_be_pushed_down_with_schemas;
 pub use row_group_filter::RowGroupAccessPlanFilter;
 pub use writer::plan_to_parquet;
-use tracing_futures::Instrument;
 
 use log::debug;
 

datafusion/optimizer/src/propagate_empty_relation.rs

@@ -192,7 +192,11 @@ impl OptimizerRule for PropagateEmptyRelation {
     }
 }
 
-fn apply_aliasing_projection_if_necessary(
+/// Takes an inner LogicalPlan, whose schema has the same length and names as
+/// `union_schema`, but (perhaps) different table qualifiers.  Assumes the
+/// DataTypes are the same.  Wraps the inner LogicalPlan with a Projection
+/// having the correct alias expressions for the output schema.
+pub fn apply_aliasing_projection_if_necessary(
     input: LogicalPlan,
     output_schema: &DFSchema,
 ) -> Result<LogicalPlan> {