Method flatten

datafusion/sql/src/unparser/ast.rs:509–512

(&mut self, value: FlattenRelationBuilder)

    }

    pub fn flatten(&mut self, value: FlattenRelationBuilder) -> &mut Self {
        self.relation = Some(TableFactorBuilder::Flatten(value));
        self
    }

    pub fn empty(&mut self) -> &mut Self {
        self.relation = Some(TableFactorBuilder::Empty);