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https://issues.apache.org/jira/browse/FLINK-3234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15132298#comment-15132298
]
ASF GitHub Bot commented on FLINK-3234:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1585#discussion_r51870593
--- Diff:
flink-java/src/test/java/org/apache/flink/api/java/operator/SortPartitionTest.java
---
@@ -169,6 +169,38 @@ public void testSortPartitionWithExpressionKeys4() {
tupleDs.sortPartition("f3", Order.ASCENDING);
}
+ @Test
+ public void testSortPartitionWithKeySelector1() {
+ final ExecutionEnvironment env =
ExecutionEnvironment.getExecutionEnvironment();
+ DataSet<Tuple4<Integer, Long, CustomType, Long[]>> tupleDs =
env.fromCollection(tupleWithCustomData, tupleWithCustomInfo);
+
+ // should work
+ try {
+ tupleDs.sortPartition(new KeySelector<Tuple4<Integer,
Long, CustomType, Long[]>, Integer>() {
+ @Override
+ public Integer getKey(Tuple4<Integer, Long,
CustomType, Long[]> value) throws Exception {
+ return value.f0;
--- End diff --
The test only works because the KeySelector function returns the first
field of the input data. If you change this to `value.f1` the test will fail.
> SortPartition does not support KeySelectorFunctions
> ---------------------------------------------------
>
> Key: FLINK-3234
> URL: https://issues.apache.org/jira/browse/FLINK-3234
> Project: Flink
> Issue Type: Improvement
> Components: DataSet API
> Affects Versions: 1.0.0, 0.10.1
> Reporter: Fabian Hueske
> Assignee: Chiwan Park
> Fix For: 1.0.0
>
>
> The following is not supported by the DataSet API:
> {code}
> DataSet<MyObject> data = ...
> DataSet<MyObject> data.sortPartition(
> new KeySelector<MyObject, Long>() {
> public Long getKey(MyObject v) {
> ...
> }
> },
> Order.ASCENDING);
> {code}
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