Esempio n. 1
0
func (udc *UpsideDownCouch) dumpPrefix(kvreader store.KVReader, rv chan interface{}, prefix []byte) {
	start := prefix
	if start == nil {
		start = []byte{0}
	}
	it := kvreader.Iterator(start)
	defer func() {
		cerr := it.Close()
		if cerr != nil {
			rv <- cerr
		}
	}()
	key, val, valid := it.Current()
	for valid {

		if prefix != nil && !bytes.HasPrefix(key, prefix) {
			break
		}

		row, err := ParseFromKeyValue(key, val)
		if err != nil {
			rv <- err
			return
		}
		rv <- row

		it.Next()
		key, val, valid = it.Current()
	}
}
Esempio n. 2
0
func (udc *UpsideDownCouch) loadSchema(kvreader store.KVReader) (err error) {

	keyPrefix := []byte{'f'}
	it := kvreader.Iterator(keyPrefix)
	defer func() {
		if cerr := it.Close(); err == nil && cerr != nil {
			err = cerr
		}
	}()

	it.Seek(keyPrefix)
	key, val, valid := it.Current()
	for valid {

		// stop when
		if !bytes.HasPrefix(key, keyPrefix) {
			break
		}
		var fieldRow *FieldRow
		fieldRow, err = NewFieldRowKV(key, val)
		if err != nil {
			return
		}
		udc.fieldIndexCache.AddExisting(fieldRow.name, fieldRow.index)

		it.Next()
		key, val, valid = it.Current()
	}

	keyPrefix = []byte{'v'}
	val, err = kvreader.Get(keyPrefix)
	if err != nil {
		return
	}
	var vr *VersionRow
	vr, err = NewVersionRowKV(keyPrefix, val)
	if err != nil {
		return
	}
	if vr.version != Version {
		err = IncompatibleVersion
		return
	}

	return
}
Esempio n. 3
0
func (udc *UpsideDownCouch) countDocs(kvreader store.KVReader) (count uint64, err error) {
	it := kvreader.Iterator([]byte{'b'})
	defer func() {
		if cerr := it.Close(); err == nil && cerr != nil {
			err = cerr
		}
	}()

	key, _, valid := it.Current()
	for valid {
		if !bytes.HasPrefix(key, []byte{'b'}) {
			break
		}
		count++
		it.Next()
		key, _, valid = it.Current()
	}

	return
}