/**
* 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.cli;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.metastore.MetaStoreClient;
import org.apache.hadoop.hive.metastore.api.FieldSchema;
import org.apache.hadoop.hive.metastore.api.MetaException;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.apache.hadoop.hive.ql.CommandProcessor;
public class MetadataProcessor implements CommandProcessor {
public int run(String command) {
SessionState ss = SessionState.get();
String table_name = command.trim();
if(table_name.equals("")) {
return 0;
}
try {
MetaStoreClient msc = new MetaStoreClient(ss.getConf());
if(!msc.tableExists(table_name)) {
ss.err.println("table does not exist: " + table_name);
return 1;
} else {
List<FieldSchema> fields = msc.get_fields(table_name);
for(FieldSchema f: fields) {
ss.out.println(f.getName() + ": " + f.getType());
}
}
} catch (MetaException err) {
ss.err.println("Got meta exception: " + err.getMessage());
return 1;
} catch (Exception err) {
ss.err.println("Got exception: " + err.getMessage());
return 1;
}
return 0;
}
}