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From "Kadir OZDEMIR (JIRA)" <>
Subject [jira] [Created] (PHOENIX-5025) Tool to clean up orphan views
Date Fri, 16 Nov 2018 01:04:00 GMT
Kadir OZDEMIR created PHOENIX-5025:

             Summary: Tool to clean up orphan views
                 Key: PHOENIX-5025
             Project: Phoenix
          Issue Type: New Feature
            Reporter: Kadir OZDEMIR
            Assignee: Kadir OZDEMIR

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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