chore: return GoValuateFuncs as float64

Signed-off-by: Prashant Shahi <prashant@signoz.io>

pkg/query-service/postprocess/formula.go

@@ -266,20 +266,29 @@ func EvalFuncs() map[string]govaluate.ExpressionFunction {
 	GoValuateFuncs["radians"] = func(args ...interface{}) (interface{}, error) {
 		return args[0].(float64) * math.Pi / 180, nil
 	}
-
+	// Returns the current Unix timestamp in seconds.
 	GoValuateFuncs["now"] = func(args ...interface{}) (interface{}, error) {
-		return time.Now().Unix(), nil
+		return float64(time.Now().Unix()), nil
 	}
-
+	// Returns the given timestamp in seconds. The argument can be a string in RFC3339 format or an int in seconds since Unix epoch.
 	GoValuateFuncs["toUnixTimestamp"] = func(args ...interface{}) (interface{}, error) {
 		if len(args) != 1 {
 			return nil, fmt.Errorf("toUnixTimestamp requires exactly one argument")
 		}
-		t, err := time.Parse(time.RFC3339, args[0].(string))
-		if err != nil {
-			return nil, err
+		var t time.Time
+		var err error
+		switch toUnixTsArg := args[0].(type) {
+		case int:
+			t = time.Unix(int64(toUnixTsArg), 0)
+		case string:
+			t, err = time.Parse(time.RFC3339, toUnixTsArg)
+			if err != nil {
+				return nil, err
+			}
+		default:
+			return nil, fmt.Errorf("toUnixTimestamp requires either a string in RFC3339 format or an int in seconds since Unix epoch")
 		}
-		return t.Unix(), nil
+		return float64(t.Unix()), nil
 	}
 
 	return GoValuateFuncs