use int64 for timestamps

pkg/tsdb/models/proxy/wrapper.go

@@ -77,11 +77,9 @@ func (tw *TsdbWrapper) Query(ctx context.Context, ds *models.DataSource, query *
 			points := tsdb.TimeSeriesPoints{}
 
 			for _, p := range s.Points {
-				if p.Timestamp != nil {
-					po := tsdb.NewTimePoint(null.FloatFrom(p.Value), float64(p.Timestamp.Seconds))
+				po := tsdb.NewTimePoint(null.FloatFrom(p.Value), float64(p.Timestamp))
 				points = append(points, po)
 			}
-			}
 
 			res.Results[r.RefId].Series = append(res.Results[r.RefId].Series, &tsdb.TimeSeries{
 				Name:   s.Name,

pkg/tsdb/models/tsdb_plugin.pb.go

@@ -345,7 +345,7 @@ func (m *TimeSeries) GetPoints() []*Point {
 }
 
 type Point struct {
-	Timestamp *google_protobuf.Timestamp `protobuf:"bytes,1,opt,name=timestamp" json:"timestamp,omitempty"`
+	Timestamp int64   `protobuf:"varint,1,opt,name=timestamp" json:"timestamp,omitempty"`
 	Value     float64 `protobuf:"fixed64,2,opt,name=value" json:"value,omitempty"`
 }
 
@@ -354,11 +354,11 @@ func (m *Point) String() string            { return proto1.CompactTextString(m)
 func (*Point) ProtoMessage()               {}
 func (*Point) Descriptor() ([]byte, []int) { return fileDescriptor0, []int{7} }
 
-func (m *Point) GetTimestamp() *google_protobuf.Timestamp {
+func (m *Point) GetTimestamp() int64 {
 	if m != nil {
 		return m.Timestamp
 	}
-	return nil
+	return 0
 }
 
 func (m *Point) GetValue() float64 {
@@ -454,47 +454,47 @@ var _TsdbPlugin_serviceDesc = grpc.ServiceDesc{
 func init() { proto1.RegisterFile("tsdb_plugin.proto", fileDescriptor0) }
 
 var fileDescriptor0 = []byte{
-	// 672 bytes of a gzipped FileDescriptorProto
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+	// 663 bytes of a gzipped FileDescriptorProto
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 }

pkg/tsdb/models/tsdb_plugin.proto

@@ -61,7 +61,7 @@ message TimeSeries {
 }
 
 message Point {
-  google.protobuf.Timestamp timestamp = 1;
+  int64 timestamp = 1;
   double value = 2;
 }