func tryRangeIDKey(kv engine.MVCCKeyValue) (string, error) {
if kv.Key.Timestamp != hlc.ZeroTimestamp {
return "", fmt.Errorf("range ID keys shouldn't have timestamps: %s", kv.Key)
}
_, _, suffix, _, err := keys.DecodeRangeIDKey(kv.Key.Key)
if err != nil {
return "", err
}
// All range ID keys are stored inline on the metadata.
var meta enginepb.MVCCMetadata
if err := meta.Unmarshal(kv.Value); err != nil {
return "", err
}
value := roachpb.Value{RawBytes: meta.RawBytes}
// Values encoded as protobufs set msg and continue outside the
// switch. Other types are handled inside the switch and return.
var msg proto.Message
switch {
case bytes.Equal(suffix, keys.LocalLeaseAppliedIndexSuffix):
fallthrough
case bytes.Equal(suffix, keys.LocalRaftAppliedIndexSuffix):
i, err := value.GetInt()
if err != nil {
return "", err
}
return strconv.FormatInt(i, 10), nil
case bytes.Equal(suffix, keys.LocalRangeFrozenStatusSuffix):
b, err := value.GetBool()
if err != nil {
return "", err
}
return strconv.FormatBool(b), nil
case bytes.Equal(suffix, keys.LocalAbortCacheSuffix):
msg = &roachpb.AbortCacheEntry{}
case bytes.Equal(suffix, keys.LocalRangeLastGCSuffix):
msg = &hlc.Timestamp{}
case bytes.Equal(suffix, keys.LocalRaftTombstoneSuffix):
msg = &roachpb.RaftTombstone{}
case bytes.Equal(suffix, keys.LocalRaftTruncatedStateSuffix):
msg = &roachpb.RaftTruncatedState{}
case bytes.Equal(suffix, keys.LocalRangeLeaseSuffix):
msg = &roachpb.Lease{}
case bytes.Equal(suffix, keys.LocalRangeStatsSuffix):
msg = &enginepb.MVCCStats{}
case bytes.Equal(suffix, keys.LocalRaftHardStateSuffix):
msg = &raftpb.HardState{}
case bytes.Equal(suffix, keys.LocalRaftLastIndexSuffix):
i, err := value.GetInt()
if err != nil {
return "", err
}
return strconv.FormatInt(i, 10), nil
case bytes.Equal(suffix, keys.LocalRangeLastVerificationTimestampSuffixDeprecated):
msg = &hlc.Timestamp{}
case bytes.Equal(suffix, keys.LocalRangeLastReplicaGCTimestampSuffix):
msg = &hlc.Timestamp{}
default:
return "", fmt.Errorf("unknown raft id key %s", suffix)
}
if err := value.GetProto(msg); err != nil {
return "", err
}
return msg.String(), nil
}
// UnmarshalColumnValue decodes the value from a key-value pair using the type
// expected by the column. An error is returned if the value's type does not
// match the column's type.
func UnmarshalColumnValue(
a *DatumAlloc, kind ColumnType_Kind, value *roachpb.Value,
) (parser.Datum, error) {
if value == nil {
return parser.DNull, nil
}
switch kind {
case ColumnType_BOOL:
v, err := value.GetBool()
if err != nil {
return nil, err
}
return parser.MakeDBool(parser.DBool(v)), nil
case ColumnType_INT:
v, err := value.GetInt()
if err != nil {
return nil, err
}
return a.NewDInt(parser.DInt(v)), nil
case ColumnType_FLOAT:
v, err := value.GetFloat()
if err != nil {
return nil, err
}
return a.NewDFloat(parser.DFloat(v)), nil
case ColumnType_DECIMAL:
v, err := value.GetDecimal()
if err != nil {
return nil, err
}
dd := a.NewDDecimal(parser.DDecimal{})
dd.Set(v)
return dd, nil
case ColumnType_STRING:
v, err := value.GetBytes()
if err != nil {
return nil, err
}
return a.NewDString(parser.DString(v)), nil
case ColumnType_BYTES:
v, err := value.GetBytes()
if err != nil {
return nil, err
}
return a.NewDBytes(parser.DBytes(v)), nil
case ColumnType_DATE:
v, err := value.GetInt()
if err != nil {
return nil, err
}
return a.NewDDate(parser.DDate(v)), nil
case ColumnType_TIMESTAMP:
v, err := value.GetTime()
if err != nil {
return nil, err
}
return a.NewDTimestamp(parser.DTimestamp{Time: v}), nil
case ColumnType_TIMESTAMPTZ:
v, err := value.GetTime()
if err != nil {
return nil, err
}
return a.NewDTimestampTZ(parser.DTimestampTZ{Time: v}), nil
case ColumnType_INTERVAL:
d, err := value.GetDuration()
if err != nil {
return nil, err
}
return a.NewDInterval(parser.DInterval{Duration: d}), nil
default:
return nil, errors.Errorf("unsupported column type: %s", kind)
}
}