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()
}
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())
}
}