Esempio n. 1
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. 2
0
func (udc *UpsideDownCouch) backIndexRowForDoc(kvreader store.KVReader, docID string) (*BackIndexRow, error) {
	// use a temporary row structure to build key
	tempRow := &BackIndexRow{
		doc: []byte(docID),
	}
	key := tempRow.Key()
	value, err := kvreader.Get(key)
	if err != nil {
		return nil, err
	}
	if value == nil {
		return nil, nil
	}
	backIndexRow, err := NewBackIndexRowKV(key, value)
	if err != nil {
		return nil, err
	}
	return backIndexRow, nil
}