improved sql parser support create table partition syntax

src/main/java/com/alibaba/druid/sql/ast/SQLSubPartition.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright 1999-2101 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.ast;
+
+import com.alibaba.druid.sql.visitor.SQLASTVisitor;
+
+public class SQLSubPartition extends SQLObjectImpl {
+
+    protected SQLName           name;
+
+    protected SQLPartitionValue values;
+
+    public SQLName getName() {
+        return name;
+    }
+
+    public void setName(SQLName name) {
+        if (name != null) {
+            name.setParent(this);
+        }
+        this.name = name;
+    }
+    
+    public SQLPartitionValue getValues() {
+        return values;
+    }
+
+    public void setValues(SQLPartitionValue values) {
+        if (values != null) {
+            values.setParent(this);
+        }
+        this.values = values;
+    }
+
+    @Override
+    protected void accept0(SQLASTVisitor visitor) {
+        if (visitor.visit(this)) {
+            acceptChild(visitor, name);
+            acceptChild(visitor, values);
+        }
+        visitor.endVisit(this);
+    }
+
+}