diff --git a/src/main/java/com/alibaba/druid/sql/ast/statement/SQLUnionOperator.java b/src/main/java/com/alibaba/druid/sql/ast/statement/SQLUnionOperator.java
index ac4e3948a3..b1ddaa2e11 100644
--- a/src/main/java/com/alibaba/druid/sql/ast/statement/SQLUnionOperator.java
+++ b/src/main/java/com/alibaba/druid/sql/ast/statement/SQLUnionOperator.java
@@ -16,7 +16,10 @@
 package com.alibaba.druid.sql.ast.statement;
 
 public enum SQLUnionOperator {
-    UNION("UNION"), UNION_ALL("UNION ALL"), MINUS("MINUS"), EXCEPT("EXCEPT"), INTERSECT("INTERSECT"),
+    UNION("UNION"),
+    UNION_ALL("UNION ALL"),
+    MINUS("MINUS"), EXCEPT("EXCEPT"),
+    INTERSECT("INTERSECT"),
     DISTINCT("UNION DISTINCT");
 
     public final String name;