From 21f2502f1f5f92526a553d9c0c7c4c620957a917 Mon Sep 17 00:00:00 2001
From: yanghao3 <yanghao3@xiaomi.com>
Date: Fri, 27 Oct 2017 19:49:13 +0800
Subject: [PATCH] init

---
 .../java/org/apache/kylin/cube/model/AggregationGroup.java     | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/core-cube/src/main/java/org/apache/kylin/cube/model/AggregationGroup.java b/core-cube/src/main/java/org/apache/kylin/cube/model/AggregationGroup.java
index d976c79..e5c6738 100644
--- a/core-cube/src/main/java/org/apache/kylin/cube/model/AggregationGroup.java
+++ b/core-cube/src/main/java/org/apache/kylin/cube/model/AggregationGroup.java
@@ -410,9 +410,13 @@ public class AggregationGroup implements Serializable {
                     }
                 }
             }
-
-            cuboidID = cuboidID | Collections.min(getJoints(), Cuboid.cuboidSelectComparator);
-            Preconditions.checkState(isOnTree(cuboidID));
+            if(getJoints().size() > 0) {
+                cuboidID = cuboidID | Collections.min(getJoints(), Cuboid.cuboidSelectComparator);
+            }
+            if(!isOnTree(cuboidID)) {
+                return null;
+            }
+            
         }
         return cuboidID;
     }
-- 
1.9.1