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https://issues.apache.org/jira/browse/TAJO-1686?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15190418#comment-15190418
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ASF GitHub Bot commented on TAJO-1686:
--------------------------------------
Github user eminency commented on a diff in the pull request:
https://github.com/apache/tajo/pull/929#discussion_r55785562
--- Diff:
tajo-catalog/tajo-catalog-common/src/main/java/org/apache/tajo/catalog/FunctionDescBuilder.java
---
@@ -0,0 +1,105 @@
+/***
+ * 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
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+ * 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.catalog;
+
+import org.apache.tajo.catalog.proto.CatalogProtos.FunctionType;
+import org.apache.tajo.common.TajoDataTypes.DataType;
+import org.apache.tajo.function.*;
+
+public class FunctionDescBuilder {
--- End diff --
Actually, I found out a main difference. PB's builder has a nested
structure. It must build children's PB at first and build its own PB. So it
looks complex to use.
The builder I made receives all informations needed at same level, then
builds FunctionDesc including children objects at once. So it doesn't have to
consider objects' hierarchy.
Which one can be better do you think?
> 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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