mirror of
https://github.com/apache/sqoop.git
synced 2025-05-04 06:41:12 +08:00
4b193ec488
From: Christopher Douglas <cdouglas@apache.org> git-svn-id: https://svn.apache.org/repos/asf/incubator/sqoop/trunk@1149834 13f79535-47bb-0310-9956-ffa450edef68
43 lines
1.7 KiB
Plaintext
43 lines
1.7 KiB
Plaintext
|
|
////
|
|
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.
|
|
////
|
|
|
|
|
|
Controlling the Input Format
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
include::input-formatting.txt[]
|
|
|
|
The following arguments allow you to control the input format of
|
|
records:
|
|
|
|
include::input-formatting-args.txt[]
|
|
|
|
If you have already imported data into HDFS in a text-based
|
|
representation and want to change the delimiters being used, you
|
|
should regenerate the class via `sqoop --generate-only`, specifying
|
|
the new delimiters with +--fields-terminated-by+, etc., and the old
|
|
delimiters with +--input-fields-terminated-by+, etc. Then run a
|
|
MapReduce job where your mapper creates an instance of your record
|
|
class, uses its +parse()+ method to read the fields using the old
|
|
delimiters, and emits a new +Text+ output value via the record's
|
|
+toString()+ method, which will use the new delimiters. You'll then
|
|
want to regenerate the class another time without the
|
|
+--input-fields-terminated-by+ specified so that the new delimiters
|
|
are used for both input and output.
|
|
|