select_raw

# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 787
        def select_raw(sql, name = nil)
          res = execute(sql, name)
          results = res.result
          fields = []
          rows = []
          if results.length > 0
            fields = res.fields
            results.each do |row|
              hashed_row = {}
              row.each_index do |cell_index|
                # If this is a money type column and there are any currency symbols,
                # then strip them off. Indeed it would be prettier to do this in
                # PostgreSQLColumn.string_to_decimal but would break form input
                # fields that call value_before_type_cast.
                if res.type(cell_index) == MONEY_COLUMN_TYPE_OID
                  # Because money output is formatted according to the locale, there are two
                  # cases to consider (note the decimal separators):
                  #  (1) $12,345,678.12        
                  #  (2) $12.345.678,12
                  case column = row[cell_index]
                    when /^-?\D+[\d,]+\.\d{2}$/  # (1)
                      row[cell_index] = column.gsub(/[^-\d\.]/, '')
                    when /^-?\D+[\d\.]+,\d{2}$/  # (2)
                      row[cell_index] = column.gsub(/[^-\d,]/, '').sub(/,/, '.')
                  end
                end

                hashed_row[fields[cell_index]] = column
              end
              rows << row
            end
          end
          res.clear
          return fields, rows
        end