Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/5441#discussion_r167922399
  
    --- Diff: 
flink-libraries/flink-sql-client/src/main/java/org/apache/flink/table/client/gateway/ResultStore.java
 ---
    @@ -0,0 +1,124 @@
    +/*
    + * 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.flink.table.client.gateway;
    +
    +import org.apache.flink.configuration.Configuration;
    +import org.apache.flink.configuration.JobManagerOptions;
    +import org.apache.flink.runtime.net.ConnectionUtils;
    +import org.apache.flink.table.client.SqlClientException;
    +import org.apache.flink.table.client.config.Deployment;
    +import org.apache.flink.table.client.config.Environment;
    +
    +import java.net.InetAddress;
    +import java.net.InetSocketAddress;
    +import java.net.UnknownHostException;
    +import java.util.ArrayList;
    +import java.util.HashMap;
    +import java.util.List;
    +import java.util.Map;
    +
    +/**
    + * Maintains dynamic results.
    + */
    +public class ResultStore {
    +
    +   private Configuration flinkConfig;
    +
    +   private Map<String, DynamicResult> results;
    +
    +   public ResultStore(Configuration flinkConfig) {
    +           this.flinkConfig = flinkConfig;
    +
    +           results = new HashMap<>();
    +   }
    +
    +   public DynamicResult createResult(Environment env) {
    +           if (!env.getExecution().isStreamingExecution()) {
    +                   throw new SqlExecutionException("Emission is only 
supported in streaming environments yet.");
    --- End diff --
    
    Is this the point at which batch queries will fail? 
    Can we fail earlier with a better error message?


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