// decodeKeyVals decodes the values that are part of the key. ValTypes is a
// slice returned from makeKeyVals. The decoded values are stored in the vals
// parameter while the valTypes parameter is unmodified. Note that len(vals) >=
// len(valTypes). The types of the decoded values will match the corresponding
// entry in the valTypes parameter with the exception that a value might also
// be parser.DNull. The remaining bytes in the key after decoding the values
// are returned.
func decodeKeyVals(valTypes, vals []parser.Datum, key []byte) ([]byte, error) {
for j := range valTypes {
var isNull bool
if key, isNull = encoding.DecodeIfNull(key); isNull {
vals[j] = parser.DNull
continue
}
switch valTypes[j].(type) {
case parser.DInt:
var i int64
key, i = encoding.DecodeVarint(key)
vals[j] = parser.DInt(i)
case parser.DFloat:
var f float64
key, f = encoding.DecodeFloat(key, nil)
vals[j] = parser.DFloat(f)
case parser.DString:
var r string
key, r = encoding.DecodeString(key, nil)
vals[j] = parser.DString(r)
default:
return nil, util.Errorf("TODO(pmattis): decoded index key: %s", valTypes[j].Type())
}
}
return key, nil
}
func decodeTableKey(valType parser.Datum, key []byte) (parser.Datum, []byte, error) {
var isNull bool
if key, isNull = encoding.DecodeIfNull(key); isNull {
return parser.DNull, key, nil
}
switch valType.(type) {
case parser.DBool:
rkey, i, err := encoding.DecodeVarint(key)
return parser.DBool(i != 0), rkey, err
case parser.DInt:
rkey, i, err := encoding.DecodeVarint(key)
return parser.DInt(i), rkey, err
case parser.DFloat:
rkey, f, err := encoding.DecodeFloat(key, nil)
return parser.DFloat(f), rkey, err
case parser.DString:
rkey, r, err := encoding.DecodeString(key, nil)
return parser.DString(r), rkey, err
case parser.DBytes:
rkey, r, err := encoding.DecodeString(key, nil)
return parser.DBytes(r), rkey, err
case parser.DDate:
rkey, t, err := encoding.DecodeTime(key)
return parser.DDate{Time: t}, rkey, err
case parser.DTimestamp:
rkey, t, err := encoding.DecodeTime(key)
return parser.DTimestamp{Time: t}, rkey, err
case parser.DInterval:
rkey, d, err := encoding.DecodeVarint(key)
return parser.DInterval{Duration: time.Duration(d)}, rkey, err
default:
return nil, nil, util.Errorf("TODO(pmattis): decoded index key: %s", valType.Type())
}
}
func decodeTableKey(valType parser.Datum, key []byte) (parser.Datum, []byte, error) {
var isNull bool
if key, isNull = encoding.DecodeIfNull(key); isNull {
return parser.DNull, key, nil
}
switch valType.(type) {
case parser.DBool:
var i int64
key, i = encoding.DecodeVarint(key)
return parser.DBool(i != 0), key, nil
case parser.DInt:
var i int64
key, i = encoding.DecodeVarint(key)
return parser.DInt(i), key, nil
case parser.DFloat:
var f float64
key, f = encoding.DecodeFloat(key, nil)
return parser.DFloat(f), key, nil
case parser.DString:
var r string
key, r = encoding.DecodeString(key, nil)
return parser.DString(r), key, nil
default:
return nil, nil, util.Errorf("TODO(pmattis): decoded index key: %s", valType.Type())
}
}
func decodeKeyPrint(key roachpb.Key) string {
var buf bytes.Buffer
for k := 0; len(key) > 0; k++ {
var err error
switch encoding.PeekType(key) {
case encoding.Null:
key, _ = encoding.DecodeIfNull(key)
fmt.Fprintf(&buf, "/NULL")
case encoding.NotNull:
key, _ = encoding.DecodeIfNotNull(key)
fmt.Fprintf(&buf, "/#")
case encoding.Int:
var i int64
key, i, err = encoding.DecodeVarintAscending(key)
if err == nil {
fmt.Fprintf(&buf, "/%d", i)
}
case encoding.Float:
var f float64
key, f, err = encoding.DecodeFloatAscending(key, nil)
if err == nil {
fmt.Fprintf(&buf, "/%f", f)
}
case encoding.Bytes:
var s string
key, s, err = encoding.DecodeStringAscending(key, nil)
if err == nil {
fmt.Fprintf(&buf, "/%q", s)
}
case encoding.BytesDesc:
var s string
key, s, err = encoding.DecodeStringDescending(key, nil)
if err == nil {
fmt.Fprintf(&buf, "/%q", s)
}
case encoding.Time:
var t time.Time
key, t, err = encoding.DecodeTimeAscending(key)
if err == nil {
fmt.Fprintf(&buf, "/%s", t.UTC().Format(time.UnixDate))
}
case encoding.TimeDesc:
var t time.Time
key, t, err = encoding.DecodeTimeDescending(key)
if err == nil {
fmt.Fprintf(&buf, "/%s", t.UTC().Format(time.UnixDate))
}
default:
// This shouldn't ever happen, but if it does let the loop exit.
fmt.Fprintf(&buf, "/%q", []byte(key))
key = nil
}
if err != nil {
fmt.Fprintf(&buf, "/<%v>", err)
continue
}
}
return buf.String()
}
// prettyKey pretty-prints the specified key, skipping over the first skip
// fields.
func prettyKey(key roachpb.Key, skip int) string {
if !bytes.HasPrefix(key, keys.TableDataPrefix) {
return fmt.Sprintf("index key missing table data prefix: %q vs %q",
key, keys.TableDataPrefix)
}
key = key[len(keys.TableDataPrefix):]
var buf bytes.Buffer
for k := 0; len(key) > 0; k++ {
var d interface{}
var err error
switch encoding.PeekType(key) {
case encoding.Null:
key, _ = encoding.DecodeIfNull(key)
d = parser.DNull
case encoding.NotNull:
key, _ = encoding.DecodeIfNotNull(key)
d = "#"
case encoding.Int:
var i int64
key, i, err = encoding.DecodeVarint(key)
d = parser.DInt(i)
case encoding.Float:
var f float64
key, f, err = encoding.DecodeFloat(key, nil)
d = parser.DFloat(f)
case encoding.Bytes:
var s string
key, s, err = encoding.DecodeString(key, nil)
d = parser.DString(s)
case encoding.Time:
var t time.Time
key, t, err = encoding.DecodeTime(key)
d = parser.DTimestamp{Time: t}
default:
// This shouldn't ever happen, but if it does let the loop exit.
key = nil
d = "unknown"
}
if skip > 0 {
skip--
continue
}
if err != nil {
fmt.Fprintf(&buf, "/<%v>", err)
continue
}
fmt.Fprintf(&buf, "/%s", d)
}
return buf.String()
}
// DecodeTableKey decodes a table key/value.
func DecodeTableKey(
a *DatumAlloc, valType parser.Datum, key []byte, dir encoding.Direction,
) (parser.Datum, []byte, error) {
if (dir != encoding.Ascending) && (dir != encoding.Descending) {
return nil, nil, util.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.(type) {
case *parser.DBool:
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.DInt:
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.DFloat:
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.DDecimal:
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.DString:
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.DBytes:
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.DDate:
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.DTimestamp:
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.DTimestampTZ:
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.DInterval:
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, util.Errorf("TODO(pmattis): decoded index key: %s", valType.Type())
}
}
func decodeTableKey(valType parser.Datum, key []byte, dir encoding.Direction) (
parser.Datum, []byte, error) {
if (dir != encoding.Ascending) && (dir != encoding.Descending) {
return nil, nil, util.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.(type) {
case parser.DBool:
var i int64
if dir == encoding.Ascending {
rkey, i, err = encoding.DecodeVarintAscending(key)
} else {
rkey, i, err = encoding.DecodeVarintDescending(key)
}
return parser.DBool(i != 0), rkey, err
case parser.DInt:
var i int64
if dir == encoding.Ascending {
rkey, i, err = encoding.DecodeVarintAscending(key)
} else {
rkey, i, err = encoding.DecodeVarintDescending(key)
}
return parser.DInt(i), rkey, err
case parser.DFloat:
var f float64
if dir == encoding.Ascending {
rkey, f, err = encoding.DecodeFloatAscending(key, nil)
} else {
rkey, f, err = encoding.DecodeFloatDescending(key, nil)
}
return parser.DFloat(f), rkey, err
case *parser.DDecimal:
var d *inf.Dec
if dir == encoding.Ascending {
rkey, d, err = encoding.DecodeDecimalAscending(key, nil)
} else {
rkey, d, err = encoding.DecodeDecimalDescending(key, nil)
}
dd := &parser.DDecimal{}
dd.Set(d)
return dd, rkey, err
case parser.DString:
var r string
if dir == encoding.Ascending {
rkey, r, err = encoding.DecodeStringAscending(key, nil)
} else {
rkey, r, err = encoding.DecodeStringDescending(key, nil)
}
return parser.DString(r), rkey, err
case parser.DBytes:
var r []byte
if dir == encoding.Ascending {
rkey, r, err = encoding.DecodeBytesAscending(key, nil)
} else {
rkey, r, err = encoding.DecodeBytesDescending(key, nil)
}
return parser.DBytes(r), rkey, err
case parser.DDate:
var t int64
if dir == encoding.Ascending {
rkey, t, err = encoding.DecodeVarintAscending(key)
} else {
rkey, t, err = encoding.DecodeVarintDescending(key)
}
return parser.DDate(t), rkey, err
case parser.DTimestamp:
var t time.Time
if dir == encoding.Ascending {
rkey, t, err = encoding.DecodeTimeAscending(key)
} else {
rkey, t, err = encoding.DecodeTimeDescending(key)
}
return parser.DTimestamp{Time: t}, rkey, err
case parser.DInterval:
var d int64
if dir == encoding.Ascending {
rkey, d, err = encoding.DecodeVarintAscending(key)
} else {
rkey, d, err = encoding.DecodeVarintDescending(key)
}
return parser.DInterval{Duration: time.Duration(d)}, rkey, err
default:
return nil, nil, util.Errorf("TODO(pmattis): decoded index key: %s", valType.Type())
}
}