extract_limit

# File activerecord/lib/active_record/connection_adapters/mysql_adapter.rb, line 108
        def extract_limit(sql_type)
          case sql_type
          when /blob|text/i
            case sql_type
            when /tiny/i
              255
            when /medium/i
              16777215
            when /long/i
              2147483647 # mysql only allows 2^31-1, not 2^32-1, somewhat inconsistently with the tiny/medium/normal cases
            else
              super # we could return 65535 here, but we leave it undecorated by default
            end
          when /^bigint/i;    8
          when /^int/i;       4
          when /^mediumint/i; 3
          when /^smallint/i;  2
          when /^tinyint/i;   1
          else
            super
          end
        end