content: /*
   * 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.calcite.server;
  
  import org.apache.calcite.avatica.Meta;
  import org.apache.calcite.jdbc.CalciteConnection;
  import org.apache.calcite.jdbc.CalcitePrepare;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  import java.util.Iterator;
  
  /**
   * Statement within a Calcite server.
   */
  public interface CalciteServerStatement {
    /** Creates a context for preparing a statement for execution. */
    CalcitePrepare.Context createPrepareContext();
  
    /** Returns the connection. */
    CalciteConnection getConnection();
  
    void setSignature(Meta.Signature signature);
  
    Meta.@Nullable Signature getSignature();
  
    @Nullable Iterator<Object> getResultSet();
  
    void setResultSet(Iterator<Object> resultSet);
  }
  