Merge pull request #367 from msaf1980/master

fix empty result in moving function
go-graphite · Oct 15, 2018 · ce2f31d · ce2f31d
2 parents 21aed51 + a94b484
commit ce2f31d
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/expr/functions/moving/function.go b/expr/functions/moving/function.go
@@ -66,15 +66,19 @@ func (f *moving) Do(e parser.Expr, from, until int64, values map[parser.MetricRe
 		return nil, err
 	}
 
+	var result []*types.MetricData
+
+	if len(arg) == 0 {
+		return result, nil
+	}
+
 	var offset int
 
 	if scaleByStep {
 		windowSize /= int(arg[0].StepTime)
 		offset = windowSize
 	}
 
-	var result []*types.MetricData
-
 	for _, a := range arg {
 		w := &types.Windowed{Data: make([]float64, windowSize)}