don't convert to uint64

pkg/tsdb/postgres/macros.go

@@ -83,11 +83,11 @@ func (m *PostgresMacroEngine) evaluateMacro(name string, args []string) (string,
 		if len(args) == 0 {
 			return "", fmt.Errorf("missing time column argument for macro %v", name)
 		}
-		return fmt.Sprintf("extract(epoch from %s) BETWEEN %d AND %d", args[0], uint64(m.TimeRange.GetFromAsMsEpoch()/1000), uint64(m.TimeRange.GetToAsMsEpoch()/1000)), nil
+		return fmt.Sprintf("extract(epoch from %s) BETWEEN %d AND %d", args[0], int64(m.TimeRange.GetFromAsMsEpoch()/1000), int64(m.TimeRange.GetToAsMsEpoch()/1000)), nil
 	case "__timeFrom":
-		return fmt.Sprintf("to_timestamp(%d)", uint64(m.TimeRange.GetFromAsMsEpoch()/1000)), nil
+		return fmt.Sprintf("to_timestamp(%d)", int64(m.TimeRange.GetFromAsMsEpoch()/1000)), nil
 	case "__timeTo":
-		return fmt.Sprintf("to_timestamp(%d)", uint64(m.TimeRange.GetToAsMsEpoch()/1000)), nil
+		return fmt.Sprintf("to_timestamp(%d)", int64(m.TimeRange.GetToAsMsEpoch()/1000)), nil
 	case "__timeGroup":
 		if len(args) < 2 {
 			return "", fmt.Errorf("macro %v needs time column and interval and optional fill value", name)
@@ -114,11 +114,11 @@ func (m *PostgresMacroEngine) evaluateMacro(name string, args []string) (string,
 		if len(args) == 0 {
 			return "", fmt.Errorf("missing time column argument for macro %v", name)
 		}
-		return fmt.Sprintf("%s >= %d AND %s <= %d", args[0], uint64(m.TimeRange.GetFromAsMsEpoch()/1000), args[0], uint64(m.TimeRange.GetToAsMsEpoch()/1000)), nil
+		return fmt.Sprintf("%s >= %d AND %s <= %d", args[0], int64(m.TimeRange.GetFromAsMsEpoch()/1000), args[0], int64(m.TimeRange.GetToAsMsEpoch()/1000)), nil
 	case "__unixEpochFrom":
-		return fmt.Sprintf("%d", uint64(m.TimeRange.GetFromAsMsEpoch()/1000)), nil
+		return fmt.Sprintf("%d", int64(m.TimeRange.GetFromAsMsEpoch()/1000)), nil
 	case "__unixEpochTo":
-		return fmt.Sprintf("%d", uint64(m.TimeRange.GetToAsMsEpoch()/1000)), nil
+		return fmt.Sprintf("%d", int64(m.TimeRange.GetToAsMsEpoch()/1000)), nil
 	default:
 		return "", fmt.Errorf("Unknown macro %v", name)
 	}

pkg/tsdb/postgres/macros_test.go

@@ -85,5 +85,12 @@ func TestMacroEngine(t *testing.T) {
 			So(sql, ShouldEqual, "select 18446744066914187038")
 		})
 
+		timeRange := &tsdb.TimeRange{From: "-315622800000", To: "315529200000"} // 1960-1980
+		Convey("interpolate __timeFilter function before epoch", func() {
+			sql, err := engine.Interpolate(query, timeRange, "WHERE $__timeFilter(time_column)")
+			So(err, ShouldBeNil)
+
+			So(sql, ShouldEqual, "WHERE extract(epoch from time_column) BETWEEN -315622800 AND 315529200")
+		})
 	})
 }