| /* |
| * 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.drill.exec.planner.sql.handlers; |
| |
| import org.apache.calcite.sql.SqlLiteral; |
| import org.apache.calcite.sql.SqlNode; |
| import org.apache.commons.lang3.StringUtils; |
| import org.apache.drill.common.exceptions.UserException; |
| import org.apache.drill.exec.alias.AliasRegistry; |
| import org.apache.drill.exec.physical.PhysicalPlan; |
| import org.apache.drill.exec.planner.sql.DirectPlan; |
| import org.apache.drill.exec.planner.sql.parser.SqlDropAllAliases; |
| import org.apache.drill.exec.work.foreman.ForemanSetupException; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.Locale; |
| |
| /** |
| * Handler for handling DROP ALL ALIASES statements. |
| */ |
| public class DropAllAliasesHandler extends BaseAliasHandler { |
| |
| private static final Logger logger = LoggerFactory.getLogger(DropAllAliasesHandler.class); |
| |
| public DropAllAliasesHandler(SqlHandlerConfig config) { |
| super(config); |
| } |
| |
| @Override |
| public PhysicalPlan getPlan(SqlNode sqlNode) throws ForemanSetupException, IOException { |
| checkAliasesEnabled(); |
| |
| SqlDropAllAliases node = unwrap(sqlNode, SqlDropAllAliases.class); |
| |
| String aliasTarget = ((SqlLiteral) node.getAliasKind()).toValue(); |
| AliasRegistry aliasRegistry = getAliasRegistry(aliasTarget); |
| |
| boolean isPublicAlias = ((SqlLiteral) node.getIsPublic()).booleanValue(); |
| if (isPublicAlias) { |
| deletePublicAliases(node.getUser(), aliasRegistry); |
| } else { |
| deleteUserAliases(node.getUser(), aliasRegistry); |
| } |
| return DirectPlan.createDirectPlan(context, true, String.format("%s aliases dropped successfully", |
| StringUtils.capitalize(aliasTarget.toLowerCase(Locale.ROOT)))); |
| } |
| |
| private void deleteUserAliases(SqlNode user, AliasRegistry aliasRegistry) { |
| if (!context.isImpersonationEnabled()) { |
| throw UserException.validationError() |
| .message("Cannot drop user aliases when user impersonation is disabled") |
| .build(logger); |
| } |
| String userName = resolveUserName(user); |
| aliasRegistry.deleteUserAliases(userName); |
| } |
| |
| private void deletePublicAliases(SqlNode user, AliasRegistry aliasRegistry) { |
| if (user != null) { |
| throw UserException.validationError() |
| .message("Cannot drop public aliases for specific user") |
| .build(logger); |
| } |
| checkAdminPrivileges(context.getOptions()); |
| aliasRegistry.deletePublicAliases(); |
| } |
| } |