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https://issues.apache.org/jira/browse/TAJO-1686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15182503#comment-15182503
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ASF GitHub Bot commented on TAJO-1686:
--------------------------------------
Github user jihoonson commented on a diff in the pull request:
https://github.com/apache/tajo/pull/929#discussion_r55157868
--- Diff:
tajo-common/src/test/java/org/apache/tajo/util/TestWritableTypeConverter.java
---
@@ -0,0 +1,65 @@
+/*
+ * 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.tajo.util;
+
+import org.apache.hadoop.hive.serde2.io.DateWritable;
+import org.apache.hadoop.hive.serde2.io.TimestampWritable;
+import org.apache.hadoop.io.Writable;
+import org.apache.tajo.datum.DateDatum;
+import org.apache.tajo.datum.Datum;
+import org.apache.tajo.datum.TimestampDatum;
+import org.apache.tajo.util.datetime.DateTimeUtil;
+import org.apache.tajo.util.datetime.TimeMeta;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+public class TestWritableTypeConverter {
--- End diff --
It would be better if you add some negative tests.
> Allow Tajo to use Hive UDF
> --------------------------
>
> Key: TAJO-1686
> URL: https://issues.apache.org/jira/browse/TAJO-1686
> Project: Tajo
> Issue Type: New Feature
> Components: Function/UDF
> Reporter: Jaehwa Jung
> Assignee: Jongyoung Park
>
> Hive has been widely used in this area. Many users have maintained lots of
> big tables through Hive metastore using HiveQL and UDFs. Currently, Tajo
> provides own UDF and Hive users can implement their UDFs in Tajo. But if we
> can wrap Hive UDF in Tajo, it seems that they would be able to use Tajo
> easily for their analysis infrastructure.
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