Ejemplo n.º 1
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
}
Ejemplo n.º 2
0
func localRangeIDKeyPrint(key roachpb.Key) string {
	var buf bytes.Buffer
	if encoding.PeekType(key) != encoding.Int {
		return fmt.Sprintf("/err<%q>", []byte(key))
	}

	// Get the rangeID.
	key, i, err := encoding.DecodeVarintAscending(key)
	if err != nil {
		return fmt.Sprintf("/err<%v:%q>", err, []byte(key))
	}

	fmt.Fprintf(&buf, "/%d", i)

	// Print and remove the rangeID infix specifier.
	if len(key) != 0 {
		fmt.Fprintf(&buf, "/%s", string(key[0]))
		key = key[1:]
	}

	// Get the suffix.
	hasSuffix := false
	for _, s := range rangeIDSuffixDict {
		if bytes.HasPrefix(key, s.suffix) {
			fmt.Fprintf(&buf, "/%s", s.name)
			key = key[len(s.suffix):]
			if s.ppFunc != nil && len(key) != 0 {
				fmt.Fprintf(&buf, "%s", s.ppFunc(key))
				return buf.String()
			}
			hasSuffix = true
			break
		}
	}

	// Get the encode values.
	if hasSuffix {
		fmt.Fprintf(&buf, "%s", decodeKeyPrint(key))
	} else {
		fmt.Fprintf(&buf, "%q", []byte(key))
	}

	return buf.String()
}
Ejemplo n.º 3
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)
	}
}