diff --git a/src/main/java/com/alibaba/druid/sql/dialect/oracle/ast/stmt/OracleTableTypeDef.java b/src/main/java/com/alibaba/druid/sql/dialect/oracle/ast/stmt/OracleTableTypeDef.java
deleted file mode 100644
index 2eab8ec877..0000000000
--- a/src/main/java/com/alibaba/druid/sql/dialect/oracle/ast/stmt/OracleTableTypeDef.java
+++ /dev/null
@@ -1,82 +0,0 @@
-/*
- * Copyright 1999-2011 Alibaba Group Holding Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.alibaba.druid.sql.dialect.oracle.ast.stmt;
-
-import com.alibaba.druid.sql.ast.SQLName;
-import com.alibaba.druid.sql.dialect.oracle.visitor.OracleASTVisitor;
-
-public class OracleTableTypeDef extends OracleTypeDef {
-
-    private static final long serialVersionUID = 1L;
-
-    private boolean           ref              = false;
-    private SQLName           name;
-    private boolean           type             = false;
-
-    private boolean           notNull          = false;
-
-    public OracleTableTypeDef(){
-
-    }
-
-    protected void accept0(OracleASTVisitor visitor) {
-        if (visitor.visit(this)) {
-            acceptChild(visitor, name);
-        }
-
-        visitor.endVisit(this);
-    }
-
-    public boolean isNotNull() {
-        return this.notNull;
-    }
-
-    public void setNotNull(boolean notNull) {
-        this.notNull = notNull;
-    }
-
-    public SQLName getName() {
-        return this.name;
-    }
-
-    public void setName(SQLName name) {
-        this.name = name;
-    }
-
-    public boolean isType() {
-        return this.type;
-    }
-
-    public void setType(boolean type) {
-        this.type = type;
-    }
-
-    public boolean isRef() {
-        return this.ref;
-    }
-
-    public void setRef(boolean ref) {
-        this.ref = ref;
-    }
-
-    public void output(StringBuffer buf) {
-        if (this.ref) {
-            buf.append("REF ");
-        }
-
-        buf.append(super.toString());
-    }
-}
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleASTVIsitorAdapter.java b/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleASTVIsitorAdapter.java
index 3f76f94549..e4147378d0 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleASTVIsitorAdapter.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleASTVIsitorAdapter.java
@@ -44,7 +44,6 @@ import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectSubqueryTableSo
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectTableReference;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectUnPivot;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleTableExpr;
-import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleTableTypeDef;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListClause;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListMultiColumnItem;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListSingleColumnItem;
@@ -206,11 +205,6 @@ public class OracleASTVIsitorAdapter extends SQLASTVisitorAdapter implements Ora
 
     }
 
-    @Override
-    public void endVisit(OracleTableTypeDef x) {
-
-    }
-
     @Override
     public void endVisit(OracleTimestampExpr x) {
 
@@ -415,12 +409,6 @@ public class OracleASTVIsitorAdapter extends SQLASTVisitorAdapter implements Ora
         return true;
     }
 
-    @Override
-    public boolean visit(OracleTableTypeDef x) {
-
-        return true;
-    }
-
     @Override
     public boolean visit(OracleTimestampExpr x) {
 
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleASTVisitor.java b/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleASTVisitor.java
index 6aa23e5160..151dd28981 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleASTVisitor.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleASTVisitor.java
@@ -56,7 +56,6 @@ import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectSubqueryTableSo
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectTableReference;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectUnPivot;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleTableExpr;
-import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleTableTypeDef;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListClause;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListMultiColumnItem;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListSingleColumnItem;
@@ -124,8 +123,6 @@ public interface OracleASTVisitor extends SQLASTVisitor {
 
     void endVisit(OracleTableExpr x);
 
-    void endVisit(OracleTableTypeDef x);
-
     void endVisit(OracleTimestampExpr x);
 
     void endVisit(OracleUpdateSetListClause x);
@@ -196,8 +193,6 @@ public interface OracleASTVisitor extends SQLASTVisitor {
 
     boolean visit(OracleTableExpr x);
 
-    boolean visit(OracleTableTypeDef x);
-
     boolean visit(OracleTimestampExpr x);
 
     boolean visit(OracleUpdateSetListClause x);
diff --git a/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java b/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java
index fd31e02e57..96d6d52a31 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/oracle/visitor/OracleOutputVisitor.java
@@ -73,7 +73,6 @@ import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectSubqueryTableSo
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectTableReference;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleSelectUnPivot;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleTableExpr;
-import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleTableTypeDef;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListClause;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListMultiColumnItem;
 import com.alibaba.druid.sql.dialect.oracle.ast.stmt.OracleUpdateSetListSingleColumnItem;
@@ -651,21 +650,6 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
         return false;
     }
 
-    public boolean visit(OracleTableTypeDef x) {
-        print("AS TABLE OF ");
-        x.getName().accept(this);
-
-        if (x.isType()) {
-            print("%TYPE");
-        }
-
-        if (x.isNotNull()) {
-            print(" NOT NULL");
-        }
-
-        return false;
-    }
-
     public boolean visit(OracleTimestampExpr x) {
         print("TIMESTAMP '");
 
@@ -891,11 +875,6 @@ public class OracleOutputVisitor extends SQLASTOutputVisitor implements OracleAS
 
     }
 
-    @Override
-    public void endVisit(OracleTableTypeDef x) {
-
-    }
-
     @Override
     public void endVisit(OracleTimestampExpr x) {