dengzhhu653 commented on code in PR #6674: URL: https://github.com/apache/hive/pull/6674#discussion_r3780491860
########## standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/handler/AlterTableHandler.java: ########## @@ -0,0 +1,608 @@ +/* + * 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.handler; + +import java.io.IOException; +import java.net.URI; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; + +import org.apache.commons.collections4.CollectionUtils; +import org.apache.commons.lang3.StringUtils; +import org.apache.hadoop.fs.FileSystem; +import org.apache.hadoop.fs.Path; +import org.apache.hadoop.hive.common.StatsSetupConst; +import org.apache.hadoop.hive.common.TableName; +import org.apache.hadoop.hive.common.repl.ReplConst; +import org.apache.hadoop.hive.metastore.Batchable; +import org.apache.hadoop.hive.metastore.Deadline; +import org.apache.hadoop.hive.metastore.HiveAlterHandler; +import org.apache.hadoop.hive.metastore.HiveMetaHook; +import org.apache.hadoop.hive.metastore.HiveMetaStore; +import org.apache.hadoop.hive.metastore.IHMSHandler; +import org.apache.hadoop.hive.metastore.IMetaStoreMetadataTransformer; +import org.apache.hadoop.hive.metastore.MetaStoreListenerNotifier; +import org.apache.hadoop.hive.metastore.RawStore; +import org.apache.hadoop.hive.metastore.ReplChangeManager; +import org.apache.hadoop.hive.metastore.TableType; +import org.apache.hadoop.hive.metastore.TransactionalMetaStoreEventListener; +import org.apache.hadoop.hive.metastore.Warehouse; +import org.apache.hadoop.hive.metastore.api.AlterTableRequest; +import org.apache.hadoop.hive.metastore.api.Database; +import org.apache.hadoop.hive.metastore.api.EnvironmentContext; +import org.apache.hadoop.hive.metastore.api.FieldSchema; +import org.apache.hadoop.hive.metastore.api.GetTableRequest; +import org.apache.hadoop.hive.metastore.api.InvalidOperationException; +import org.apache.hadoop.hive.metastore.api.MetaException; +import org.apache.hadoop.hive.metastore.api.NoSuchObjectException; +import org.apache.hadoop.hive.metastore.api.Partition; +import org.apache.hadoop.hive.metastore.api.PartitionsRequest; +import org.apache.hadoop.hive.metastore.api.Table; +import org.apache.hadoop.hive.metastore.api.hive_metastoreConstants; +import org.apache.hadoop.hive.metastore.conf.MetastoreConf; +import org.apache.hadoop.hive.metastore.events.AlterTableEvent; +import org.apache.hadoop.hive.metastore.events.PreAlterTableEvent; +import org.apache.hadoop.hive.metastore.messaging.EventMessage; +import org.apache.hadoop.hive.metastore.utils.FileUtils; +import org.apache.hadoop.hive.metastore.utils.MetaStoreServerUtils; +import org.apache.hadoop.hive.metastore.utils.MetaStoreUtils; +import org.apache.hadoop.hive.metastore.DefaultIncompatibleTableChangeHandler; +import org.apache.thrift.TException; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import static org.apache.hadoop.hive.metastore.utils.MetaStoreServerUtils.isDbReplicationTarget; +import static org.apache.hadoop.hive.metastore.utils.MetaStoreUtils.getDefaultCatalog; +import static org.apache.hadoop.hive.metastore.utils.StringUtils.normalizeIdentifier; + +@SuppressWarnings("unused") +@RequestHandler(requestBody = AlterTableRequest.class) +public class AlterTableHandler + extends AbstractRequestHandler<AlterTableRequest, AlterTableHandler.AlterTableResult> { + private static final Logger LOG = LoggerFactory.getLogger(AlterTableHandler.class); + + private String catName; + private String dbname; + private String name; + private Table newTable; + private EnvironmentContext envContext; + private String validWriteIdList; + private List<String> processorCapabilities; + private String processorId; + + private RawStore msdb; + private Warehouse wh; + private Table oldTable; + private boolean isReplicated; + + AlterTableHandler(IHMSHandler handler, AlterTableRequest request) { + super(handler, false, request); + } + + AlterTableHandler(IHMSHandler handler, DirectAlterContext ctx) { + super(handler, false, new AlterTableRequest()); + this.msdb = ctx.msdb(); + this.wh = ctx.wh(); + this.catName = ctx.catName(); + this.dbname = ctx.dbname(); + this.name = ctx.name(); + this.newTable = ctx.newTable(); + this.envContext = ctx.envContext(); + this.validWriteIdList = ctx.validWriteIdList(); + } + + public static void runDirectAlter(IHMSHandler handler, DirectAlterContext ctx) + throws InvalidOperationException, MetaException { + try { + AlterTableHandler op = new AlterTableHandler(handler, ctx); + AlterTableResult result = op.alterTableCore(); + op.notifyRegularListeners(result); + } catch (TException e) { + throw new MetaException(e.getMessage()); + } + } + + public record DirectAlterContext(RawStore msdb, Warehouse wh, String catName, String dbname, String name, + Table newTable, EnvironmentContext envContext, String validWriteIdList) { + } + + @Override + protected void beforeExecute() throws TException, IOException { + this.catName = request.isSetCatName() && request.getCatName() != null + ? request.getCatName() : getDefaultCatalog(handler.getConf()); + this.dbname = request.getDbName(); + this.name = request.getTableName(); + this.newTable = request.getTable(); + this.validWriteIdList = request.getValidWriteIdList(); + this.processorCapabilities = request.getProcessorCapabilities(); + this.processorId = request.getProcessorIdentifier(); + + this.envContext = request.getEnvironmentContext() != null + ? request.getEnvironmentContext() : new EnvironmentContext(); + if (request.getExpectedParameterKey() != null) { + envContext.putToProperties(hive_metastoreConstants.EXPECTED_PARAMETER_KEY, + request.getExpectedParameterKey()); + } + if (request.getExpectedParameterValue() != null) { + envContext.putToProperties(hive_metastoreConstants.EXPECTED_PARAMETER_VALUE, + request.getExpectedParameterValue()); + } + + try { + Database db = handler.get_database_core(catName, dbname); + if (MetaStoreUtils.isDatabaseRemote(db)) { + throw new MetaException("Alter table in REMOTE database " + db.getName() + " is not allowed"); + } + } catch (NoSuchObjectException e) { + throw new InvalidOperationException("Alter table in REMOTE database is not allowed"); + } + + if (newTable.getParameters() == null + || newTable.getParameters().get(hive_metastoreConstants.DDL_TIME) == null) { + newTable.putToParameters(hive_metastoreConstants.DDL_TIME, + Long.toString(System.currentTimeMillis() / 1000)); + } + + if (newTable.getSd() != null) { + String newLocation = newTable.getSd().getLocation(); + if (StringUtils.isNotEmpty(newLocation)) { + Path tblPath = handler.getWh().getDnsPath(new Path(newLocation)); + newTable.getSd().setLocation(tblPath.toString()); + } + } + + if (!newTable.isSetCatName()) { + newTable.setCatName(catName); + } + + GetTableRequest getReq = new GetTableRequest(dbname, name); + getReq.setCatName(catName); + Table oldt = handler.get_table_core(getReq); + + IMetaStoreMetadataTransformer transformer = handler.getMetadataTransformer(); + if (transformer != null) { + newTable = transformer.transformAlterTable(oldt, newTable, processorCapabilities, processorId); + } + + ((BaseHandler) handler).firePreEvent(new PreAlterTableEvent(oldt, newTable, handler)); + } + + @Override + protected AlterTableResult execute() throws TException, IOException { + this.msdb = handler.getMS(); Review Comment: nit: can you move the two variables into `beforeExecute` -- This is an automated message from the Apache Git Service. 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