try_push_down_projection

datafusion_physical_optimizer::projection_pushdown

Function try_push_down_projection 

Source 
fn try_push_down_projection(
    other_schema: SchemaRef,
    plan: Arc<dyn ExecutionPlan>,
    join_side: JoinSide,
    join_filter: JoinFilter,
    alias_generator: &AliasGenerator,
) -> Result<Transformed<(Arc<dyn ExecutionPlan>, JoinFilter)>>
Expand description

Tries to push down parts of expr into the join_side.