| |
| //// |
| 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 +import-all-tables+ tool imports a set of tables from an RDBMS to HDFS. |
| Data from each table is stored in a separate directory in HDFS. |
| |
| For the +import-all-tables+ tool to be useful, the following conditions |
| must be met: |
| |
| - Each table must have a single-column primary key or +--autoreset-to-one-mapper+ option must be used. |
| - You must intend to import all columns of each table. |
| - You must not intend to use non-default splitting column, nor impose |
| any conditions via a +WHERE+ clause. |
| |