1 /*
2 * Copyright (c) 2011. The Apache Software Foundation
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20
21 package org.apache.hadoop.hbase.hbql.statement;
22
23 import org.apache.hadoop.hbase.client.HBaseAdmin;
24 import org.apache.hadoop.hbase.hbql.client.HBqlException;
25 import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
26
27 import java.io.IOException;
28
29 public class DropFamilyAction implements AlterTableAction {
30
31 private final String familyName;
32
33 public DropFamilyAction(final String familyName) {
34 this.familyName = familyName;
35 }
36
37 private String getFamilyName() {
38 return this.familyName;
39 }
40
41 public void execute(final HConnectionImpl conn,
42 final HBaseAdmin admin,
43 final String tableName) throws HBqlException {
44 try {
45 conn.validateFamilyExistsForTable(this.getFamilyName(), tableName);
46 admin.deleteColumn(tableName, this.getFamilyName());
47 }
48 catch (IOException e) {
49 throw new HBqlException(e);
50 }
51 }
52 }