try_pushdown_through_join

datafusion::physical_plan::projection

Function try_pushdown_through_join 

Source 
pub fn try_pushdown_through_join(
    projection: &ProjectionExec,
    join_left: &Arc<dyn ExecutionPlan>,
    join_right: &Arc<dyn ExecutionPlan>,
    join_on: &[(Arc<dyn PhysicalExpr>, Arc<dyn PhysicalExpr>)],
    schema: Arc<Schema>,
    filter: Option<&JoinFilter>,
) -> Result<Option<JoinData>, DataFusionError>