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: JoinOnRef<'_>,
    schema: SchemaRef,
    filter: Option<&JoinFilter>,
) -> Result<Option<JoinData>>