| /** |
| * 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.sqoop.mapreduce.db.netezza; |
| |
| import java.sql.ResultSet; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| import org.apache.sqoop.mapreduce.db.DBSplitter; |
| import |
| org.apache.sqoop.mapreduce.db.DataDrivenDBInputFormat.DataDrivenDBInputSplit; |
| |
| import org.apache.sqoop.config.ConfigurationHelper; |
| |
| /** |
| * Netezza specific splitter based on data slice id. |
| */ |
| public class NetezzaDBDataSliceSplitter implements DBSplitter { |
| |
| // Note: We have removed the throws SQLException clause as there is no |
| // SQL work done in this method |
| @Override |
| public List<InputSplit> split(Configuration conf, ResultSet results, |
| String colName) { |
| // For each map we will add a split such that |
| // the datasliceid % the mapper index equals the mapper index. |
| // The query will only be on the lower bound where clause. |
| // For upper bounds, we will specify a constant clause which always |
| // evaluates to true |
| |
| int numSplits = ConfigurationHelper.getConfNumMaps(conf); |
| List<InputSplit> splitList = new ArrayList<InputSplit>(numSplits); |
| for (int i = 0; i < numSplits; ++i) { |
| StringBuilder lowerBoundClause = new StringBuilder(128); |
| lowerBoundClause.append(" datasliceid % ").append(numSplits) |
| .append(" = ").append(i); |
| splitList.add(new DataDrivenDBInputSplit(lowerBoundClause.toString(), |
| "1 = 1")); |
| } |
| return splitList; |
| } |
| |
| } |