[jira] [Created] (PHOENIX-6124) Block adding/dropping a column on a parent view for clients <4.15 and for clients that have phoenix.allow.system.catalog.rollback=true

[Chinmay Kulkarni (Jira)]

Chinmay Kulkarni created PHOENIX-6124:
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             Summary: 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: 4.15.0, 5.0.0
            Reporter: Chinmay Kulkarni
             Fix For: 5.1.0, 4.16.0


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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