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https://issues.apache.org/jira/browse/PHOENIX-6124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17213649#comment-17213649
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ASF GitHub Bot commented on PHOENIX-6124:
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virajjasani commented on pull request #917:
URL: https://github.com/apache/phoenix/pull/917#issuecomment-708183801
Thanks @stoty for taking a look.
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> Block adding/dropping a column on a parent view for clients <4.15 and for
> clients that have phoenix.allow.system.catalog.rollback=true
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: PHOENIX-6124
> URL: https://issues.apache.org/jira/browse/PHOENIX-6124
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 5.0.0, 4.15.0
> Reporter: Chinmay Kulkarni
> Assignee: Viraj Jasani
> Priority: Blocker
> Fix For: 5.1.0, 4.16.0
>
> Attachments: PHOENIX-6124.master.000.patch
>
>
> For pre-4.15 clients, we have to block adding/dropping a column to a table if
> it has child views since we can’t do any checkAndPut distributed locking (see
> [this|https://github.com/apache/phoenix/blob/6ecc66738e576a5349605c2f5b20003df03f95de/phoenix-core/src/main/java/org/apache/phoenix/coprocessor/MetaDataEndpointImpl.java#L2595-L2616]).
>
> However, this is only prevented if the parent is a table and not if the
> parent is a view. We should extend [the
> condition|https://github.com/apache/phoenix/blob/6ecc66738e576a5349605c2f5b20003df03f95de/phoenix-core/src/main/java/org/apache/phoenix/coprocessor/MetaDataEndpointImpl.java#L2591]
> to also cover views since conflicting mutations on its children can also
> lead to inconsistencies.
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