code: public BaseBuffer doSeek(String strSeekSign, FieldTable table, KeyAreaInfo keyArea) throws DBException
      {
          return null;
      }
docs: Read the record that matches this record's temp key area.<p>
  WARNING - This method changes the current record's buffer.
  @param strSeekSign - Seek sign:<p>
  <pre>
  "=" - Look for the first match.
  "==" - Look for an exact match (On non-unique keys, must match primary key also).
  ">" - Look for the first record greater than this.
  ">=" - Look for the first record greater than or equal to this.
  "<" - Look for the first record less than or equal to this.
  "<=" - Look for the first record less than or equal to this.
  </pre>
  returns: success/failure (true/false).
  @param table The basetable.
  @param keyArea The key area.
  @exception DBException File exception.