
////
  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.
////

The +export+ tool exports a set of files from HDFS back to an RDBMS.
The target table must already exist in the database. The input files
are read and parsed into a set of records according to the
user-specified delimiters. 

The default operation is to transform these into a set of +INSERT+
statements that inject the records into the database. In "update mode,"
Sqoop will generate +UPDATE+ statements that replace existing records
in the database, and in "call mode" Sqoop will make a stored procedure
call for each record.