| /* |
| * 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.auth.Permission; |
| import org.apache.cassandra.config.CFMetaData; |
| import org.apache.cassandra.config.Schema; |
| import org.apache.cassandra.config.ViewDefinition; |
| import org.apache.cassandra.cql3.CFName; |
| import org.apache.cassandra.db.view.View; |
| import org.apache.cassandra.exceptions.ConfigurationException; |
| import org.apache.cassandra.exceptions.InvalidRequestException; |
| import org.apache.cassandra.exceptions.UnauthorizedException; |
| import org.apache.cassandra.service.ClientState; |
| import org.apache.cassandra.service.MigrationManager; |
| import org.apache.cassandra.service.QueryState; |
| import org.apache.cassandra.transport.Event; |
| |
| public class DropViewStatement extends SchemaAlteringStatement |
| { |
| public final boolean ifExists; |
| |
| public DropViewStatement(CFName cf, boolean ifExists) |
| { |
| super(cf); |
| this.ifExists = ifExists; |
| } |
| |
| public void checkAccess(ClientState state) throws UnauthorizedException, InvalidRequestException |
| { |
| CFMetaData baseTable = View.findBaseTable(keyspace(), columnFamily()); |
| if (baseTable != null) |
| state.hasColumnFamilyAccess(keyspace(), baseTable.cfName, Permission.ALTER); |
| } |
| |
| public void validate(ClientState state) |
| { |
| // validated in findIndexedCf() |
| } |
| |
| public Event.SchemaChange announceMigration(QueryState queryState, boolean isLocalOnly) throws InvalidRequestException, ConfigurationException |
| { |
| try |
| { |
| // ViewDefinition view = Schema.instance.getViewDefinition(keyspace(), columnFamily()); |
| // if (view == null) |
| // { |
| // if (Schema.instance.getCFMetaData(keyspace(), columnFamily()) != null) |
| // throw new ConfigurationException(String.format("Cannot drop table '%s' in keyspace '%s'.", columnFamily(), keyspace())); |
| // |
| // throw new ConfigurationException(String.format("Cannot drop non existing materialized view '%s' in keyspace '%s'.", columnFamily(), keyspace())); |
| // } |
| // |
| // CFMetaData baseCfm = Schema.instance.getCFMetaData(view.baseTableId); |
| // if (baseCfm == null) |
| // { |
| // if (ifExists) |
| // throw new ConfigurationException(String.format("Cannot drop materialized view '%s' in keyspace '%s' without base CF.", columnFamily(), keyspace())); |
| // else |
| // throw new InvalidRequestException(String.format("View '%s' could not be found in any of the tables of keyspace '%s'", cfName, keyspace())); |
| // } |
| |
| MigrationManager.announceViewDrop(keyspace(), columnFamily(), isLocalOnly); |
| return new Event.SchemaChange(Event.SchemaChange.Change.DROPPED, Event.SchemaChange.Target.TABLE, keyspace(), columnFamily()); |
| } |
| catch (ConfigurationException e) |
| { |
| if (ifExists) |
| return null; |
| throw e; |
| } |
| } |
| } |