diff --git a/headless/core/src/main/java/com/tencent/supersonic/headless/core/translator/parser/calcite/SqlBuilder.java b/headless/core/src/main/java/com/tencent/supersonic/headless/core/translator/parser/calcite/SqlBuilder.java
index 1dd87d34f..3617d6df4 100644
--- a/headless/core/src/main/java/com/tencent/supersonic/headless/core/translator/parser/calcite/SqlBuilder.java
+++ b/headless/core/src/main/java/com/tencent/supersonic/headless/core/translator/parser/calcite/SqlBuilder.java
@@ -91,6 +91,9 @@ public class SqlBuilder {
                 }
             }
         }
+        if (selectedGraphPath == null) {
+            return dataModels;
+        }
         Set<String> modelNames = Sets.newHashSet();
         for (DefaultEdge edge : selectedGraphPath.getEdgeList()) {
             modelNames.add(selectedGraphPath.getGraph().getEdgeSource(edge));