Method alias

datafusion/sql/src/unparser/ast.rs:518–537

(&mut self, value: Option<ast::TableAlias>)

        self
    }
    pub fn alias(&mut self, value: Option<ast::TableAlias>) -> &mut Self {
        let new = self;
        match new.relation {
            Some(TableFactorBuilder::Table(ref mut rel_builder)) => {
                rel_builder.alias = value;
            }
            Some(TableFactorBuilder::Derived(ref mut rel_builder)) => {
                rel_builder.alias = value;
            }
            Some(TableFactorBuilder::Unnest(ref mut rel_builder)) => {
                rel_builder.alias = value;
            }
            Some(TableFactorBuilder::Flatten(ref mut rel_builder)) => {
                rel_builder.alias = value;
            }
            Some(TableFactorBuilder::Empty) => (),
            None => (),
        }
        new
    }
    pub fn build(&self) -> Result<Option<ast::TableFactor>, BuilderError> {
        Ok(match self.relation {
            Some(TableFactorBuilder::Table(ref value)) => Some(value.build()?),