org.apache.cassandra.cql3.statements.DropViewStatement Maven / Gradle / Ivy
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The Apache Cassandra Project develops a highly scalable second-generation distributed database, bringing together Dynamo's fully distributed design and Bigtable's ColumnFamily-based data model.
/*
* 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
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package org.apache.cassandra.cql3.statements;
import org.apache.cassandra.auth.Permission;
import org.apache.cassandra.config.CFMetaData;
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;
}
}
}