diff --git a/src/main/java/com/alibaba/druid/sql/ast/SQLDataTypeImpl.java b/src/main/java/com/alibaba/druid/sql/ast/SQLDataTypeImpl.java
index a9232ee75f..21c7fb62d9 100644
--- a/src/main/java/com/alibaba/druid/sql/ast/SQLDataTypeImpl.java
+++ b/src/main/java/com/alibaba/druid/sql/ast/SQLDataTypeImpl.java
@@ -18,7 +18,6 @@ package com.alibaba.druid.sql.ast;
 import java.util.ArrayList;
 import java.util.List;
 
-import com.alibaba.druid.sql.dialect.oracle.visitor.OracleASTVisitor;
 import com.alibaba.druid.sql.visitor.SQLASTVisitor;
 
 public class SQLDataTypeImpl extends SQLObjectImpl implements SQLDataType {