/**
* 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);
}
}
}