/*
* Licensed 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 com.facebook.presto.execution;
import com.facebook.presto.metadata.Metadata;
import com.facebook.presto.security.AccessControl;
import com.facebook.presto.sql.tree.Deallocate;
import com.facebook.presto.sql.tree.Expression;
import com.facebook.presto.transaction.TransactionManager;
import com.google.common.util.concurrent.ListenableFuture;
import java.util.List;
import static com.google.common.util.concurrent.Futures.immediateFuture;
public class DeallocateTask
implements DataDefinitionTask<Deallocate>
{
@Override
public String getName()
{
return "DEALLOCATE";
}
@Override
public ListenableFuture<?> execute(Deallocate statement, TransactionManager transactionManager, Metadata metadata, AccessControl accessControl, QueryStateMachine stateMachine, List<Expression> parameters)
{
String statementName = statement.getName();
stateMachine.removePreparedStatement(statementName);
return immediateFuture(null);
}
}