| /* |
| * 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.metastore; |
| |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| import org.apache.hadoop.hive.conf.HiveConf; |
| import org.apache.hadoop.hive.conf.HiveConf.ConfVars; |
| import org.apache.hive.jdbc.miniHS2.MiniHS2; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| import java.sql.Connection; |
| import java.sql.DriverManager; |
| import java.sql.Statement; |
| import java.util.HashMap; |
| |
| /** |
| * Test that set/unset of metaconf:hive.metastore.disallow.incompatible.col.type.changes is local |
| * to the session |
| * |
| * Two connections are created. In one connection |
| * metaconf:hive.metastore.disallow.incompatible.col.type.changes is set to false. Then the |
| * columm type can changed from int to smallint. In the other connection |
| * metaconf:hive.metastore.disallow.incompatible.col.type.changes is left with the default value |
| * true. In that connection changing column type from int to smallint will throw an error. |
| * |
| */ |
| public class TestHiveMetaStoreAlterColumnPar { |
| |
| public static MiniHS2 miniHS2 = null; |
| |
| @BeforeClass |
| public static void startServices() throws Exception { |
| HiveConf hiveConf = new HiveConf(); |
| hiveConf.setIntVar(ConfVars.HIVE_SERVER2_THRIFT_MIN_WORKER_THREADS, 2); |
| hiveConf.setIntVar(ConfVars.HIVE_SERVER2_THRIFT_MAX_WORKER_THREADS, 2); |
| hiveConf.setBoolVar(ConfVars.HIVE_SUPPORT_CONCURRENCY, false); |
| |
| miniHS2 = new MiniHS2.Builder().withMiniMR().withRemoteMetastore().withConf(hiveConf).build(); |
| |
| miniHS2.start(new HashMap<String, String>()); |
| |
| Connection hs2Conn = DriverManager.getConnection(miniHS2.getJdbcURL(), "hive", "hive"); |
| Statement stmt = hs2Conn.createStatement(); |
| |
| // create table |
| stmt.execute("drop table if exists t1"); |
| stmt.execute("create table t1 (c1 int)"); |
| |
| stmt.close(); |
| hs2Conn.close(); |
| } |
| |
| @AfterClass |
| public static void stopServices() throws Exception { |
| if (miniHS2 != null && miniHS2.isStarted()) { |
| miniHS2.stop(); |
| } |
| } |
| |
| @Test |
| public void testAlterColumn() throws Exception { |
| assertTrue("Test setup failed. MiniHS2 is not initialized", |
| miniHS2 != null && miniHS2.isStarted()); |
| |
| try ( |
| Connection hs2Conn1 = DriverManager |
| .getConnection(TestHiveMetaStoreAlterColumnPar.miniHS2.getJdbcURL(), "hive", "hive"); |
| Statement stmt1 = hs2Conn1.createStatement(); |
| Connection hs2Conn2 = DriverManager |
| .getConnection(TestHiveMetaStoreAlterColumnPar.miniHS2.getJdbcURL(), "hive", "hive"); |
| Statement stmt2 = hs2Conn2.createStatement(); |
| ) { |
| // Set parameter to be false in connection 1. int to smallint allowed |
| stmt1.execute("set metaconf:hive.metastore.disallow.incompatible.col.type.changes=false"); |
| stmt1.execute("alter table t1 change column c1 c1 smallint"); |
| |
| // Change the type back to int so that the same alter can be attempted from connection 2. |
| stmt1.execute("alter table t1 change column c1 c1 int"); |
| |
| // parameter value not changed to false in connection 2. int to smallint throws exception |
| try { |
| stmt2.execute("alter table t1 change column c1 c1 smallint"); |
| fail("Exception not thrown"); |
| } catch (Exception e1) { |
| assertTrue("Unexpected exception: " + e1.getMessage(), e1.getMessage().contains( |
| "Unable to alter table. The following columns have types incompatible with the existing columns in their respective positions")); |
| } |
| |
| // parameter value is still false in 1st connection. The alter still goes through. |
| stmt1.execute("alter table t1 change column c1 c1 smallint"); |
| } catch (Exception e2) { |
| fail("Unexpected Exception: " + e2.getMessage()); |
| } |
| } |
| } |