Esempio n. 1
0
File: list.go Progetto: asdine/storm
// AllRecords returns all the IDs of this index
func (idx *ListIndex) AllRecords(opts *Options) ([][]byte, error) {
	var list [][]byte

	c := internal.Cursor{C: idx.IndexBucket.Cursor(), Reverse: opts != nil && opts.Reverse}

	for k, id := c.First(); k != nil; k, id = c.Next() {
		if id == nil || bytes.Equal(k, []byte("storm__ids")) {
			continue
		}

		if opts != nil && opts.Skip > 0 {
			opts.Skip--
			continue
		}

		if opts != nil && opts.Limit == 0 {
			break
		}

		if opts != nil && opts.Limit > 0 {
			opts.Limit--
		}

		list = append(list, id)
	}

	return list, nil
}
Esempio n. 2
0
func (q *query) query(tx *bolt.Tx, sink sink) error {
	bucketName := q.bucket
	if bucketName == "" {
		bucketName = sink.bucketName()
	}
	bucket := q.node.GetBucket(tx, bucketName)

	if q.limit == 0 {
		return q.sorter.flush(sink)
	}

	if bucket != nil {
		c := internal.Cursor{C: bucket.Cursor(), Reverse: q.reverse}
		for k, v := c.First(); k != nil; k, v = c.Next() {
			if v == nil {
				continue
			}

			stop, err := q.sorter.filter(sink, q.tree, bucket, k, v)
			if err != nil {
				return err
			}

			if stop {
				break
			}
		}
	}

	return q.sorter.flush(sink)
}
Esempio n. 3
0
// AllRecords returns all the IDs of this index
func (idx *UniqueIndex) AllRecords(opts *Options) ([][]byte, error) {
	var list [][]byte

	c := internal.Cursor{C: idx.IndexBucket.Cursor(), Reverse: opts != nil && opts.Reverse}

	for val, ident := c.First(); val != nil; val, ident = c.Next() {
		if opts != nil && opts.Skip > 0 {
			opts.Skip--
			continue
		}

		if opts != nil && opts.Limit == 0 {
			break
		}

		if opts != nil && opts.Limit > 0 {
			opts.Limit--
		}

		list = append(list, ident)
	}
	return list, nil
}
Esempio n. 4
0
File: list.go Progetto: asdine/storm
// All the IDs corresponding to the given value
func (idx *ListIndex) All(value []byte, opts *Options) ([][]byte, error) {
	var list [][]byte
	c := idx.IndexBucket.Cursor()
	cur := internal.Cursor{C: c, Reverse: opts != nil && opts.Reverse}

	prefix := generatePrefix(value)

	k, id := c.Seek(prefix)
	if cur.Reverse {
		var count int
		for ; bytes.HasPrefix(k, prefix) && k != nil; k, _ = c.Next() {
			count++
		}
		k, id = c.Prev()
		list = make([][]byte, 0, count)
	}

	for ; bytes.HasPrefix(k, prefix); k, id = cur.Next() {
		if opts != nil && opts.Skip > 0 {
			opts.Skip--
			continue
		}

		if opts != nil && opts.Limit == 0 {
			break
		}

		if opts != nil && opts.Limit > 0 {
			opts.Limit--
		}

		list = append(list, id)
	}

	return list, nil
}