impl PostgresQueryBuilder {
    fn prepare_column_type_check_auto_increment(
        &self,
        column_def: &ColumnDef,
        sql: &mut SqlWriter,
    ) {
        if let Some(column_type) = &column_def.types {
            write!(sql, " ").unwrap();
            let is_auto_increment = column_def
                .spec
                .iter()
                .position(|s| matches!(s, ColumnSpec::AutoIncrement));
            if is_auto_increment.is_some() {
                match &column_type {
                    ColumnType::SmallInteger(_) => write!(sql, "smallserial").unwrap(),
                    ColumnType::Integer(_) => write!(sql, "serial").unwrap(),
                    ColumnType::BigInteger(_) => write!(sql, "bigserial").unwrap(),
                    _ => unimplemented!(), **UNIMPLEMENTED SOMETHING?**
                }
            } else {
                self.prepare_column_type(column_type, sql);
            }
        }
    }
}