Golang Value.GetInt方法代碼示例

// mustGetInt decodes an int64 value from the bytes field of the receiver
// and panics if the bytes field is not 0 or 8 bytes in length.
func mustGetInt(v *roachpb.Value) int64 {
	if v == nil {
		return 0
	}
	i, err := v.GetInt()
	if err != nil {
		panic(err)
	}
	return i
}

// 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(kind ColumnType_Kind, value *roachpb.Value) (parser.Datum, *roachpb.Error) {
	if value == nil {
		return parser.DNull, nil
	}

	switch kind {
	case ColumnType_BOOL:
		v, err := value.GetInt()
		if err != nil {
			return nil, roachpb.NewError(err)
		}
		return parser.DBool(v != 0), nil
	case ColumnType_INT:
		v, err := value.GetInt()
		if err != nil {
			return nil, roachpb.NewError(err)
		}
		return parser.DInt(v), nil
	case ColumnType_FLOAT:
		v, err := value.GetFloat()
		if err != nil {
			return nil, roachpb.NewError(err)
		}
		return parser.DFloat(v), nil
	case ColumnType_STRING:
		v, err := value.GetBytes()
		if err != nil {
			return nil, roachpb.NewError(err)
		}
		return parser.DString(v), nil
	case ColumnType_BYTES:
		v, err := value.GetBytes()
		if err != nil {
			return nil, roachpb.NewError(err)
		}
		return parser.DBytes(v), nil
	case ColumnType_DATE:
		v, err := value.GetInt()
		if err != nil {
			return nil, roachpb.NewError(err)
		}
		return parser.DDate(v), nil
	case ColumnType_TIMESTAMP:
		v, err := value.GetTime()
		if err != nil {
			return nil, roachpb.NewError(err)
		}
		return parser.DTimestamp{Time: v}, nil
	case ColumnType_INTERVAL:
		v, err := value.GetInt()
		if err != nil {
			return nil, roachpb.NewError(err)
		}
		return parser.DInterval{Duration: time.Duration(v)}, nil
	default:
		return nil, roachpb.NewErrorf("unsupported column type: %s", kind)
	}
}

// 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.GetInt()
		if err != nil {
			return nil, err
		}
		return parser.MakeDBool(parser.DBool(v != 0)), 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, util.Errorf("unsupported column type: %s", kind)
	}
}

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.LocalRangeLastVerificationTimestampSuffix):
		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
}