/* * 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); } }