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https://issues.apache.org/jira/browse/PHOENIX-5025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16705976#comment-16705976
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ASF GitHub Bot commented on PHOENIX-5025:
-----------------------------------------
Github user kadirozde commented on a diff in the pull request:
https://github.com/apache/phoenix/pull/404#discussion_r238074666
--- Diff:
phoenix-core/src/main/java/org/apache/phoenix/mapreduce/OrphanViewTool.java ---
@@ -0,0 +1,812 @@
+/*
+ * 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.phoenix.mapreduce;
--- End diff --
I could not find a good place to move. Also, we may add M/R in future.
> Tool to clean up orphan views
> -----------------------------
>
> Key: PHOENIX-5025
> URL: https://issues.apache.org/jira/browse/PHOENIX-5025
> Project: Phoenix
> Issue Type: New Feature
> Reporter: Kadir OZDEMIR
> Assignee: Kadir OZDEMIR
> Priority: Major
>
> A view without its base table is an orphan view. Since views are virtual
> tables and their data is stored in their base tables, they are useless when
> they become orphan. A base table can have child views, grandchild views and
> so on. Due to some reasons/bugs, when a base table was dropped, its views
> were not not properly cleaned up in the past. For example, the drop table
> code did not support cleaning up grandchild views. This has been recently
> fixed by PHOENIX-4764. Although PHOENIX-4764 prevents new orphan views due to
> table drop operations, it does not clean up existing orphan views. It is also
> believed that when the system catalog table was split due to a bug in the
> past, it also contributed to creating orphan views as Phoenix did not support
> splittable system catalog. Therefore, Phoenix needs a tool to clean up orphan
> views.
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