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.hbql.client.ExecutionResults;
24 import org.apache.hadoop.hbase.hbql.client.HBqlException;
25 import org.apache.hadoop.hbase.hbql.client.HMapping;
26 import org.apache.hadoop.hbase.hbql.impl.HConnectionImpl;
27
28 public class ShowMappingsStatement extends GenericStatement implements ConnectionStatement {
29
30 public ShowMappingsStatement() {
31 super(null);
32 }
33
34 protected ExecutionResults execute(final HConnectionImpl conn) throws HBqlException {
35
36 final ExecutionResults retval = new ExecutionResults();
37 retval.out.println("Mappings: ");
38 for (final HMapping mapping : conn.getAllMappings())
39 retval.out.println("\t" + mapping.getMappingName() + " mapped to table " + mapping.getTableName());
40
41 retval.out.flush();
42 return retval;
43 }
44
45 public static String usage() {
46 return "SHOW MAPPINGS";
47 }
48 }