| /** |
| * 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.hcatalog.cli.SemanticAnalysis; |
| |
| import java.io.Serializable; |
| import java.util.List; |
| |
| import org.apache.hadoop.hive.metastore.api.Database; |
| import org.apache.hadoop.hive.ql.exec.Task; |
| import org.apache.hadoop.hive.ql.metadata.Hive; |
| import org.apache.hadoop.hive.ql.metadata.HiveException; |
| import org.apache.hadoop.hive.ql.parse.ASTNode; |
| import org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer; |
| import org.apache.hadoop.hive.ql.parse.HiveParser; |
| import org.apache.hadoop.hive.ql.parse.HiveSemanticAnalyzerHookContext; |
| import org.apache.hadoop.hive.ql.parse.SemanticException; |
| import org.apache.hadoop.hive.ql.plan.CreateDatabaseDesc; |
| import org.apache.hadoop.hive.ql.plan.DDLWork; |
| import org.apache.hadoop.hive.ql.security.authorization.Privilege; |
| import org.apache.hcatalog.common.HCatConstants; |
| |
| final class CreateDatabaseHook extends HCatSemanticAnalyzerBase { |
| |
| String databaseName; |
| |
| @Override |
| public ASTNode preAnalyze(HiveSemanticAnalyzerHookContext context, ASTNode ast) |
| throws SemanticException { |
| |
| Hive db; |
| try { |
| db = context.getHive(); |
| } catch (HiveException e) { |
| throw new SemanticException("Couldn't get Hive DB instance in semantic analysis phase.", e); |
| } |
| |
| // Analyze and create tbl properties object |
| int numCh = ast.getChildCount(); |
| |
| databaseName = BaseSemanticAnalyzer.getUnescapedName((ASTNode) ast.getChild(0)); |
| |
| for (int num = 1; num < numCh; num++) { |
| ASTNode child = (ASTNode) ast.getChild(num); |
| |
| switch (child.getToken().getType()) { |
| |
| case HiveParser.TOK_IFNOTEXISTS: |
| try { |
| List<String> dbs = db.getDatabasesByPattern(databaseName); |
| if (dbs != null && dbs.size() > 0) { // db exists |
| return ast; |
| } |
| } catch (HiveException e) { |
| throw new SemanticException(e); |
| } |
| break; |
| } |
| } |
| |
| return ast; |
| } |
| |
| @Override |
| public void postAnalyze(HiveSemanticAnalyzerHookContext context, |
| List<Task<? extends Serializable>> rootTasks) throws SemanticException { |
| context.getConf().set(HCatConstants.HCAT_CREATE_DB_NAME, databaseName); |
| super.postAnalyze(context, rootTasks); |
| } |
| |
| @Override |
| protected void authorizeDDLWork(HiveSemanticAnalyzerHookContext context, |
| Hive hive, DDLWork work) throws HiveException { |
| CreateDatabaseDesc createDb = work.getCreateDatabaseDesc(); |
| if (createDb != null) { |
| Database db = new Database(createDb.getName(), createDb.getComment(), |
| createDb.getLocationUri(), createDb.getDatabaseProperties()); |
| authorize(db, Privilege.CREATE); |
| } |
| } |
| } |