| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.cassandra.cql3.statements; |
| |
| import org.apache.cassandra.cql3.CQLStatement; |
| import org.apache.cassandra.cql3.QueryOptions; |
| import org.apache.cassandra.exceptions.InvalidRequestException; |
| import org.apache.cassandra.exceptions.UnauthorizedException; |
| import org.apache.cassandra.transport.messages.ResultMessage; |
| import org.apache.cassandra.service.ClientState; |
| import org.apache.cassandra.service.QueryState; |
| |
| public class UseStatement extends ParsedStatement implements CQLStatement |
| { |
| private final String keyspace; |
| |
| public UseStatement(String keyspace) |
| { |
| this.keyspace = keyspace; |
| } |
| |
| public int getBoundTerms() |
| { |
| return 0; |
| } |
| |
| public Prepared prepare(ClientState clientState) throws InvalidRequestException |
| { |
| return new Prepared(this); |
| } |
| |
| public void checkAccess(ClientState state) throws UnauthorizedException |
| { |
| state.validateLogin(); |
| } |
| |
| public void validate(ClientState state) throws InvalidRequestException |
| { |
| } |
| |
| public ResultMessage execute(QueryState state, QueryOptions options, long queryStartNanoTime) throws InvalidRequestException |
| { |
| state.getClientState().setKeyspace(keyspace); |
| return new ResultMessage.SetKeyspace(keyspace); |
| } |
| |
| public ResultMessage executeInternal(QueryState state, QueryOptions options) throws InvalidRequestException |
| { |
| // In production, internal queries are exclusively on the system keyspace and 'use' is thus useless |
| // but for some unit tests we need to set the keyspace (e.g. for tests with DROP INDEX) |
| return execute(state, options, System.nanoTime()); |
| } |
| } |