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https://issues.apache.org/jira/browse/FLINK-2997?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15201548#comment-15201548
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ASF GitHub Bot commented on FLINK-2997:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1776#discussion_r56664085
--- Diff:
flink-tests/src/test/java/org/apache/flink/test/distribution/TestDataDist.java
---
@@ -0,0 +1,77 @@
+/*
+ * 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.flink.test.distribution;
+
+import org.apache.flink.api.common.distributions.DataDistribution;
+import org.apache.flink.api.common.typeinfo.TypeInformation;
+import org.apache.flink.api.java.typeutils.TypeExtractor;
+import org.apache.flink.core.memory.DataInputView;
+import org.apache.flink.core.memory.DataOutputView;
+
+import java.io.IOException;
+
+/**
+ * The class is used to do the tests of range partition with customed data
distribution.
+ */
+public class TestDataDist implements DataDistribution {
+
+ private int dim;
+
+ public TestDataDist() {}
+
+ /**
+ * Constructor of the customized distribution for range partition.
+ * @param dim the number of the fields.
+ */
+ public TestDataDist(int dim) {
+ this.dim = dim;
+ }
+
+ public int getParallelism() {
+ return 3;
+ }
+
+ @Override
+ public Object[] getBucketBoundary(int bucketNum, int totalNumBuckets) {
+ if (dim == 1) {
+ return new Integer[]{(bucketNum + 1) * 7};
+ }
+ return new Integer[]{(bucketNum + 1) * 7, (bucketNum) * 2 + 3};
+ }
+
+ @Override
+ public int getNumberOfFields() {
+ return this.dim;
+ }
+
+ @Override
+ public TypeInformation[] getKeyTypes() {
+ return new
TypeInformation[]{TypeExtractor.getForClass(Integer.class)};
--- End diff --
`BasicTypeInfo.INT_TYPE_INFO`
> Support range partition with user customized data distribution.
> ---------------------------------------------------------------
>
> Key: FLINK-2997
> URL: https://issues.apache.org/jira/browse/FLINK-2997
> Project: Flink
> Issue Type: New Feature
> Reporter: Chengxiang Li
>
> This is a followup work of FLINK-7, sometime user have better knowledge of
> the source data, and they can build customized data distribution to do range
> partition more efficiently.
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