Method is_negated_project

src/expr/src/relation.rs:1476–1488

If the expression is a negated project, return the input and the projection.

(&self)

    /// If the expression is a negated project, return the input and the projection.
    pub fn is_negated_project(&self) -> Option<(&MirRelationExpr, &[usize])> {
        if let MirRelationExpr::Negate { input } = self {
            if let MirRelationExpr::Project { input, outputs } = &**input {
                return Some((&**input, outputs));
            }
        }
        if let MirRelationExpr::Project { input, outputs } = self {
            if let MirRelationExpr::Negate { input } = &**input {
                return Some((&**input, outputs));
            }
        }
        None
    }

    /// Pretty-print this [MirRelationExpr] to a string.
    pub fn pretty(&self) -> String {