diff --git a/src/main/java/com/alibaba/druid/util/Histogram.java b/src/main/java/com/alibaba/druid/util/Histogram.java
index 1e21a972be..d1084b311d 100644
--- a/src/main/java/com/alibaba/druid/util/Histogram.java
+++ b/src/main/java/com/alibaba/druid/util/Histogram.java
@@ -66,4 +66,8 @@ public class Histogram {
         }
         return array;
     }
+    
+    public long[] getRanges() {
+        return ranges;
+    }
 }