make MQE meta data not null (#132)
diff --git a/metrics-v3.graphqls b/metrics-v3.graphqls
index e8dbcbb..627dfdd 100644
--- a/metrics-v3.graphqls
+++ b/metrics-v3.graphqls
@@ -68,8 +68,8 @@
}
type MQEValues {
- # The metadata description of this value series. It could be NULL if it is the result of the different metrics calculation.
- metric: Metadata
+ # The metadata description of this value series.
+ metric: Metadata!
# 1. When the type == SINGLE_VALUE, values only have one value.
# 2. When the type == TIME_SERIES_VALUES, values would match the given elements in the duration range.
# 3. When the type == SORTED_LIST, values could be results of `sort(metric)`
