/**
* 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.ql.hooks;
import java.util.Set;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.apache.hadoop.hive.ql.session.SessionState.LogHelper;
/**
* Implementation of a pre execute hook that simply prints out its
* parameters to standard output.
*/
public class PreExecutePrinter implements PreExecute {
@Override
public void run(SessionState sess, Set<ReadEntity> inputs,
Set<WriteEntity> outputs, UserGroupInformation ugi)
throws Exception {
LogHelper console = SessionState.getConsole();
if (console == null)
return;
if (sess != null)
console.printError("query: " + sess.getCmd().trim());
for(ReadEntity re: inputs) {
console.printError("Input: " + re.toString());
}
for(WriteEntity we: outputs) {
console.printError("Output: " + we.toString());
}
}
}