| 44 | } |
| 45 | |
| 46 | func (it *Iterator) Last() { |
| 47 | q := query.Query{ |
| 48 | Orders: []query.Order{query.OrderByKeyDescending{}}, |
| 49 | Filters: []query.Filter{ |
| 50 | query.FilterKeyCompare{Key: it.seekKey, Op: query.LessThanOrEqual}, |
| 51 | }, |
| 52 | } |
| 53 | if len(it.seekKey) > 5 { |
| 54 | q.Filters = append(q.Filters, query.FilterKeyPrefix{Prefix: it.seekKey[:5]}) |
| 55 | } |
| 56 | result, err := it.db.db.Query(it.db.ctx, q) |
| 57 | if err != nil { |
| 58 | logrus.Errorf("failed to query database: %v", err) |
| 59 | return |
| 60 | } |
| 61 | it.results = result |
| 62 | it.current = <-it.results.Next() |
| 63 | } |
| 64 | |
| 65 | func (it *Iterator) Seek(key []byte) { |
| 66 | it.seekKey = fmt.Sprintf("/%s", string(it.db.EncodeKey(key))) |