provide the ad-hoc access to the query result. It positions the position of the reader at a given record defined by the key. If the record is not found, then the reader position is unset and false value is returned. Once the readers position becames unset, the caller needs to call ReadFirst, ReadLast or ReadAt to re-position the reader at a valid location.
- Parameters:
-
| key | The key that identifies a record. |
- Returns:
- Returns true if a record is found or false otherwise.