fn apply_cross_view_transform(
        transform: &str,
        dataflow: &mut Vec<(GlobalId, MirRelationExpr)>,
        cat: &TestCatalog,
    ) -> Result<String, String> {
        match transform {
            "filter" => {
                let mut predicates = HashMap::new();
                match optimize_dataflow_filters_inner(dataflow.iter_mut().map(|(id, rel)| (Id::Global(*id), rel)).rev(), &mut predicates) {
                    Ok(()) => Ok(format!("Pushed-down predicates:\n{}", log_pushed_outside_of_dataflow(predicates, cat))),
                    Err(e) => Err(e.to_string()),
                }
            }
            "project" => {
                let mut demand = HashMap::new();
                if let Some((id, rel)) = dataflow.last() {
                    demand.insert(Id::Global(*id), (0..rel.arity()).collect());
                }
                match optimize_dataflow_demand_inner(dataflow.iter_mut().map(|(id, rel)| (Id::Global(*id), rel)).rev(), &mut demand) {
                    Ok(()) => Ok(format!("Pushed-down demand:\n{}", log_pushed_outside_of_dataflow(demand, cat))),
                    Err(e) => Err(e.to_string()),
                }
            }
            _ => return Err(format!(
                "no cross-view transform named {} (you might have to add it to apply_cross_view_transform)",
                transform
            ))
        }
    }
/// Applies a transform across the set of `MirRelationExpr`.
///
/// Returns a string describing information pushed down to sources.
Applies a transform across the set of `MirRelationExpr`.
Returns a string describing information pushed down to sources.
Applies a transform across the set of ` MirRelationExpr ` . Returns a string describing information pushed down to sources .
fn apply_cross_view_transform(
        transform: &str,
        dataflow: &mut Vec<(GlobalId, MirRelationExpr)>,
        cat: &TestCatalog,
    ) -> Result<String, String> {
        match transform {
            "filter" => {
                let mut predicates = HashMap::new();
                match optimize_dataflow_filters_inner(dataflow.iter_mut().map(|(id, rel)| (Id::Global(*id), rel)).rev(), &mut predicates) {
                    Ok(()) => Ok(format!("Pushed-down predicates:\n{}", log_pushed_outside_of_dataflow(predicates, cat))),
                    Err(e) => Err(e.to_string()),
                }
            }
            "project" => {
                let mut demand = HashMap::new();
                if let Some((id, rel)) = dataflow.last() {
                    demand.insert(Id::Global(*id), (0..rel.arity()).collect());
                }
                match optimize_dataflow_demand_inner(dataflow.iter_mut().map(|(id, rel)| (Id::Global(*id), rel)).rev(), &mut demand) {
                    Ok(()) => Ok(format!("Pushed-down demand:\n{}", log_pushed_outside_of_dataflow(demand, cat))),
                    Err(e) => Err(e.to_string()),
                }
            }
            _ => return Err(format!(
                "no cross-view transform named {} (you might have to add it to apply_cross_view_transform)",
                transform
            ))
        }
    }
fn apply_cross_view_transform ( transform : & str , dataflow : & mut Vec < ( GlobalId , MirRelationExpr ) > , cat : & TestCatalog , ) -> Result < String , String > { match transform { " " => { let mut predicates = HashMap :: new ( ) ; match optimize_dataflow_filters_inner ( dataflow . iter_mut ( ) . map ( | ( id , rel ) | ( Id :: Global ( * id ) , rel ) ) . rev ( ) , & mut predicates ) { Ok ( ( ) ) => Ok ( format ! ( " \n " log_pushed_outside_of_dataflow ( predicates cat ) ) ) , Err ( e ) => Err ( e . to_string ( ) ) , } } " " => { let mut demand = HashMap :: new ( ) ; if let Some ( ( id , rel ) ) = dataflow . last ( ) { demand . insert ( Id :: Global ( * id ) , ( 0 .. rel . arity ( ) ) . collect ( ) ) ; } match optimize_dataflow_demand_inner ( dataflow . iter_mut ( ) . map ( | ( id , rel ) | ( Id :: Global ( * id ) , rel ) ) . rev ( ) , & mut demand ) { Ok ( ( ) ) => Ok ( format ! ( " \n " log_pushed_outside_of_dataflow ( demand cat ) ) ) , Err ( e ) => Err ( e . to_string ( ) ) , } } _ => return Err ( format ! ( " " transform ) ) } }
Applies a transform across the set of `MirRelationExpr`.
Applies a transform across the set of ` MirRelationExpr ` .
transform
&str
dataflow
&mut Vec<(GlobalId, MirRelationExpr)>
cat
&TestCatalog
transform
&str
dataflow
&mut Vec<(GlobalId, MirRelationExpr)>
cat
&TestCatalog