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https://issues.apache.org/jira/browse/FLINK-2678?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15126588#comment-15126588
]
ASF GitHub Bot commented on FLINK-2678:
---------------------------------------
Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/1566#discussion_r51448517
--- Diff:
flink-core/src/main/java/org/apache/flink/api/common/typeutils/base/GenericArrayComparator.java
---
@@ -0,0 +1,205 @@
+/*
+ * 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.api.common.typeutils.base;
+
+import org.apache.flink.api.common.typeutils.TypeComparator;
+import org.apache.flink.api.common.typeutils.TypeSerializer;
+import org.apache.flink.core.memory.DataInputView;
+import org.apache.flink.core.memory.DataOutputView;
+import org.apache.flink.core.memory.MemorySegment;
+
+import java.io.IOException;
+import java.lang.reflect.Array;
+import java.util.Arrays;
+
+public class GenericArrayComparator<T> extends TypeComparator<T[]>
implements java.io.Serializable {
--- End diff --
Java docs missing
> DataSet API does not support multi-dimensional arrays as keys
> -------------------------------------------------------------
>
> Key: FLINK-2678
> URL: https://issues.apache.org/jira/browse/FLINK-2678
> Project: Flink
> Issue Type: Wish
> Components: DataSet API
> Reporter: Till Rohrmann
> Assignee: Subhobrata Dey
> Priority: Minor
>
> The DataSet API does not support grouping/sorting on field which are
> multi-dimensional arrays. It could be helpful to also support these types.
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