| /** |
| * 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.hadoop.hive.ql; |
| |
| import java.sql.Timestamp; |
| import java.util.Map; |
| |
| import org.apache.hadoop.hive.conf.HiveConf; |
| import org.apache.hadoop.hive.ql.metadata.HiveException; |
| import org.apache.hadoop.hive.ql.plan.HiveOperation; |
| |
| /** |
| * The class to store query level info such as queryId. Multiple queries can run |
| * in the same session, so SessionState is to hold common session related info, and |
| * each QueryState is to hold query related info. |
| * |
| */ |
| public class QueryState { |
| /** |
| * current configuration. |
| */ |
| private final HiveConf queryConf; |
| /** |
| * type of the command. |
| */ |
| private HiveOperation commandType; |
| |
| public QueryState(HiveConf conf) { |
| this(conf, null, false); |
| } |
| |
| public QueryState(HiveConf conf, Map<String, String> confOverlay, boolean runAsync) { |
| this.queryConf = createConf(conf, confOverlay, runAsync); |
| } |
| |
| /** |
| * If there are query specific settings to overlay, then create a copy of config |
| * There are two cases we need to clone the session config that's being passed to hive driver |
| * 1. Async query - |
| * If the client changes a config setting, that shouldn't reflect in the execution already underway |
| * 2. confOverlay - |
| * The query specific settings should only be applied to the query config and not session |
| * @return new configuration |
| */ |
| private HiveConf createConf(HiveConf conf, |
| Map<String, String> confOverlay, |
| boolean runAsync) { |
| |
| if ( (confOverlay != null && !confOverlay.isEmpty()) ) { |
| conf = (conf == null ? new HiveConf() : new HiveConf(conf)); |
| |
| // apply overlay query specific settings, if any |
| for (Map.Entry<String, String> confEntry : confOverlay.entrySet()) { |
| try { |
| conf.verifyAndSet(confEntry.getKey(), confEntry.getValue()); |
| } catch (IllegalArgumentException e) { |
| throw new RuntimeException("Error applying statement specific settings", e); |
| } |
| } |
| } else if (runAsync) { |
| conf = (conf == null ? new HiveConf() : new HiveConf(conf)); |
| } |
| |
| if (conf == null) { |
| conf = new HiveConf(); |
| } |
| |
| conf.setVar(HiveConf.ConfVars.HIVEQUERYID, QueryPlan.makeQueryId()); |
| return conf; |
| } |
| |
| public String getQueryId() { |
| return (queryConf.getVar(HiveConf.ConfVars.HIVEQUERYID)); |
| } |
| |
| public String getQueryString() { |
| return queryConf.getQueryString(); |
| } |
| |
| public String getCommandType() { |
| if (commandType == null) { |
| return null; |
| } |
| return commandType.getOperationName(); |
| } |
| |
| public HiveOperation getHiveOperation() { |
| return commandType; |
| } |
| |
| public void setCommandType(HiveOperation commandType) { |
| this.commandType = commandType; |
| } |
| |
| public HiveConf getConf() { |
| return queryConf; |
| } |
| } |