def get_columns(self, with_aliases=False):
        """
        Return the list of columns to use in the select statement. If no
        columns have been specified, returns all columns relating to fields in
        the model.

        If 'with_aliases' is true, any column names that are duplicated
        (without the table names) are given unique aliases. This is needed in
        some cases to avoid ambiguitity with nested queries.

        This routine is overridden from Query to handle customized selection of
        geometry columns.
        """
        qn = self.quote_name_unless_alias
        qn2 = self.connection.ops.quote_name
        result = ['(%s) AS %s' % (self.get_extra_select_format(alias) % col[0], qn2(alias))
                  for alias, col in six.iteritems(self.query.extra_select)]
        params = []
        aliases = set(self.query.extra_select.keys())
        if with_aliases:
            col_aliases = aliases.copy()
        else:
            col_aliases = set()
        if self.query.select:
            only_load = self.deferred_to_columns()
            # This loop customized for GeoQuery.
            for col, field in self.query.select:
                if isinstance(col, (list, tuple)):
                    alias, column = col
                    table = self.query.alias_map[alias].table_name
                    if only_load in table and column not in only_load[table]:
                        continue
                    r = self.get_field_select(field, alias, column)
                    if with_aliases:
                        if col[1] in col_aliases:
                            c_alias = 'Col%d' % len(col_aliases)
                            result.append('%s AS %s' % (r, c_alias))
                            aliases.add(c_alias)
                            col_aliases.add(c_alias)
                        else:
                            result.append('%s AS %s' % (r, qn2(col[1])))
                            aliases.add(r)
                            col_aliases.add(col[1])
                    else:
                        result.append(r)
                        aliases.add(r)
                        col_aliases.add(col[1])
                else:
                    col_sql, col_params = col.as_sql(qn, self.connection)
                    result.append(col_sql)
                    params.extend(col_params)

                    if hasattr(col, 'alias'):
                        aliases.add(col.alias)
                        col_aliases.add(col.alias)

        elif self.query.default_cols:
            cols, new_aliases = self.get_default_columns(with_aliases,
                    col_aliases)
            result.extend(cols)
            aliases.update(new_aliases)

        max_name_length = self.connection.ops.max_name_length()
        for alias, aggregate in self.query.aggregate_select.items():
            agg_sql, agg_params = aggregate.as_sql(qn, self.connection)
            if alias is None:
                result.append(agg_sql)
            else:
                result.append('%s AS %s' % (agg_sql, qn(truncate_name(alias, max_name_length))))
            params.extend(agg_params)

        # This loop customized for GeoQuery.
        for (table, col), field in self.query.related_select_cols:
            r = self.get_field_select(field, table, col)
            if with_aliases and col in col_aliases:
                c_alias = 'Col%d' % len(col_aliases)
                result.append('%s AS %s' % (r, c_alias))
                aliases.add(c_alias)
                col_aliases.add(c_alias)
            else:
                result.append(r)
                aliases.add(r)
                col_aliases.add(col)

        self._select_aliases = aliases
        return result, params
dataset/ETHPy150Open cloudera/hue/desktop/core/ext-py/Django-1.6.10/django/contrib/gis/db/models/sql/compiler.py/GeoSQLCompiler.get_columns/swapped operands of `in`