Пример #1
0
// Addr returns the address for the key, used to lookup the range containing
// the key. In the normal case, this is simply the key's value. However, for
// local keys, such as transaction records, range-spanning binary tree node
// pointers, the address is the inner encoded key, with the local key prefix
// and the suffix and optional detail removed. This address unwrapping is
// performed repeatedly in the case of doubly-local keys. In this way, local
// keys address to the same range as non-local keys, but are stored separately
// so that they don't collide with user-space or global system keys.
//
// However, not all local keys are addressable in the global map. Only range
// local keys incorporating a range key (start key or transaction key) are
// addressable (e.g. range metadata and txn records). Range local keys
// incorporating the Range ID are not (e.g. abort cache entries, and range
// stats).
func Addr(k roachpb.Key) (roachpb.RKey, error) {
	if !IsLocal(k) {
		return roachpb.RKey(k), nil
	}

	for {
		if bytes.HasPrefix(k, localStorePrefix) {
			return nil, errors.Errorf("store-local key %q is not addressable", k)
		}
		if bytes.HasPrefix(k, LocalRangeIDPrefix) {
			return nil, errors.Errorf("local range ID key %q is not addressable", k)
		}
		if !bytes.HasPrefix(k, LocalRangePrefix) {
			return nil, errors.Errorf("local key %q malformed; should contain prefix %q",
				k, LocalRangePrefix)
		}
		k = k[len(LocalRangePrefix):]
		var err error
		// Decode the encoded key, throw away the suffix and detail.
		if _, k, err = encoding.DecodeBytesAscending(k, nil); err != nil {
			return nil, err
		}
		if !bytes.HasPrefix(k, localPrefix) {
			break
		}
	}
	return roachpb.RKey(k), nil
}
Пример #2
0
func abortCacheKeyPrint(key roachpb.Key) string {
	_, id, err := encoding.DecodeBytesAscending([]byte(key), nil)
	if err != nil {
		return fmt.Sprintf("/%q/err:%v", key, err)
	}

	txnID, err := uuid.FromBytes(id)
	if err != nil {
		return fmt.Sprintf("/%q/err:%v", key, err)
	}

	return fmt.Sprintf("/%q", txnID)
}
Пример #3
0
// DecodeRangeKey decodes the range key into range start key,
// suffix and optional detail (may be nil).
func DecodeRangeKey(key roachpb.Key) (startKey, suffix, detail roachpb.Key, err error) {
	if !bytes.HasPrefix(key, LocalRangePrefix) {
		return nil, nil, nil, errors.Errorf("key %q does not have %q prefix",
			key, LocalRangePrefix)
	}
	// Cut the prefix and the Range ID.
	b := key[len(LocalRangePrefix):]
	b, startKey, err = encoding.DecodeBytesAscending(b, nil)
	if err != nil {
		return nil, nil, nil, err
	}
	if len(b) < localSuffixLength {
		return nil, nil, nil, errors.Errorf("key %q does not have suffix of length %d",
			key, localSuffixLength)
	}
	// Cut the suffix.
	suffix = b[:localSuffixLength]
	detail = b[localSuffixLength:]
	return
}
Пример #4
0
// DecodeAbortCacheKey decodes the provided abort cache entry,
// returning the transaction ID.
func DecodeAbortCacheKey(key roachpb.Key, dest []byte) (*uuid.UUID, error) {
	_, _, suffix, detail, err := DecodeRangeIDKey(key)
	if err != nil {
		return nil, err
	}
	if !bytes.Equal(suffix, LocalAbortCacheSuffix) {
		return nil, errors.Errorf("key %s does not contain the abort cache suffix %s",
			key, LocalAbortCacheSuffix)
	}
	// Decode the id.
	detail, idBytes, err := encoding.DecodeBytesAscending(detail, dest)
	if err != nil {
		return nil, err
	}
	if len(detail) > 0 {
		return nil, errors.Errorf("key %q has leftover bytes after decode: %s; indicates corrupt key", key, detail)
	}
	txnID, err := uuid.FromBytes(idBytes)
	return txnID, err
}
Пример #5
0
// decodeDataKeySuffix decodes a time series key into its components.
func decodeDataKeySuffix(key roachpb.Key) (string, string, Resolution, int64, error) {
	// Decode series name.
	remainder, name, err := encoding.DecodeBytesAscending(key, nil)
	if err != nil {
		return "", "", 0, 0, err
	}
	// Decode resolution.
	remainder, resolutionInt, err := encoding.DecodeVarintAscending(remainder)
	if err != nil {
		return "", "", 0, 0, err
	}
	resolution := Resolution(resolutionInt)
	// Decode timestamp.
	remainder, timeslot, err := encoding.DecodeVarintAscending(remainder)
	if err != nil {
		return "", "", 0, 0, err
	}
	timestamp := timeslot * resolution.SlabDuration()
	// The remaining bytes are the source.
	source := remainder

	return string(name), string(source), resolution, timestamp, nil
}
Пример #6
0
// DecodeTableKey decodes a table key/value.
func DecodeTableKey(
	a *DatumAlloc, valType parser.Type, key []byte, dir encoding.Direction,
) (parser.Datum, []byte, error) {
	if (dir != encoding.Ascending) && (dir != encoding.Descending) {
		return nil, nil, errors.Errorf("invalid direction: %d", dir)
	}
	var isNull bool
	if key, isNull = encoding.DecodeIfNull(key); isNull {
		return parser.DNull, key, nil
	}
	var rkey []byte
	var err error
	switch valType {
	case parser.TypeBool:
		var i int64
		if dir == encoding.Ascending {
			rkey, i, err = encoding.DecodeVarintAscending(key)
		} else {
			rkey, i, err = encoding.DecodeVarintDescending(key)
		}
		// No need to chunk allocate DBool as MakeDBool returns either
		// parser.DBoolTrue or parser.DBoolFalse.
		return parser.MakeDBool(parser.DBool(i != 0)), rkey, err
	case parser.TypeInt:
		var i int64
		if dir == encoding.Ascending {
			rkey, i, err = encoding.DecodeVarintAscending(key)
		} else {
			rkey, i, err = encoding.DecodeVarintDescending(key)
		}
		return a.NewDInt(parser.DInt(i)), rkey, err
	case parser.TypeFloat:
		var f float64
		if dir == encoding.Ascending {
			rkey, f, err = encoding.DecodeFloatAscending(key)
		} else {
			rkey, f, err = encoding.DecodeFloatDescending(key)
		}
		return a.NewDFloat(parser.DFloat(f)), rkey, err
	case parser.TypeDecimal:
		var d *inf.Dec
		if dir == encoding.Ascending {
			rkey, d, err = encoding.DecodeDecimalAscending(key, nil)
		} else {
			rkey, d, err = encoding.DecodeDecimalDescending(key, nil)
		}
		dd := a.NewDDecimal(parser.DDecimal{})
		dd.Set(d)
		return dd, rkey, err
	case parser.TypeString:
		var r string
		if dir == encoding.Ascending {
			rkey, r, err = encoding.DecodeUnsafeStringAscending(key, nil)
		} else {
			rkey, r, err = encoding.DecodeUnsafeStringDescending(key, nil)
		}
		return a.NewDString(parser.DString(r)), rkey, err
	case parser.TypeBytes:
		var r []byte
		if dir == encoding.Ascending {
			rkey, r, err = encoding.DecodeBytesAscending(key, nil)
		} else {
			rkey, r, err = encoding.DecodeBytesDescending(key, nil)
		}
		return a.NewDBytes(parser.DBytes(r)), rkey, err
	case parser.TypeDate:
		var t int64
		if dir == encoding.Ascending {
			rkey, t, err = encoding.DecodeVarintAscending(key)
		} else {
			rkey, t, err = encoding.DecodeVarintDescending(key)
		}
		return a.NewDDate(parser.DDate(t)), rkey, err
	case parser.TypeTimestamp:
		var t time.Time
		if dir == encoding.Ascending {
			rkey, t, err = encoding.DecodeTimeAscending(key)
		} else {
			rkey, t, err = encoding.DecodeTimeDescending(key)
		}
		return a.NewDTimestamp(parser.DTimestamp{Time: t}), rkey, err
	case parser.TypeTimestampTZ:
		var t time.Time
		if dir == encoding.Ascending {
			rkey, t, err = encoding.DecodeTimeAscending(key)
		} else {
			rkey, t, err = encoding.DecodeTimeDescending(key)
		}
		return a.NewDTimestampTZ(parser.DTimestampTZ{Time: t}), rkey, err
	case parser.TypeInterval:
		var d duration.Duration
		if dir == encoding.Ascending {
			rkey, d, err = encoding.DecodeDurationAscending(key)
		} else {
			rkey, d, err = encoding.DecodeDurationDescending(key)
		}
		return a.NewDInterval(parser.DInterval{Duration: d}), rkey, err
	default:
		return nil, nil, errors.Errorf("TODO(pmattis): decoded index key: %s", valType)
	}
}