[jira] [Updated] (PHOENIX-6191) We should also do checkAndPut checks on SYSTEM.MUTEX when creating a view which has its own new columns

["Chinmay Kulkarni (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PHOENIX-6191?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Chinmay Kulkarni updated PHOENIX-6191:
--------------------------------------
    Priority: Critical  (was: Major)

> We should also do checkAndPut checks on SYSTEM.MUTEX when creating a view which has its own new columns
> -------------------------------------------------------------------------------------------------------
>
>                 Key: PHOENIX-6191
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-6191
>             Project: Phoenix
>          Issue Type: Bug
>    Affects Versions: 5.0.0, 4.15.0
>            Reporter: Chinmay Kulkarni
>            Priority: Critical
>             Fix For: 5.1.0, 4.16.0
>
>
> Currently, when creating a view we do conditional writes with a checkAndPut to SYSTEM.MUTEX for the keys:
> (<physical parent's schema name>, <physical parent's table name>, <column name>)
> for each column in the view WHERE clause. Similarly, when issuing an ALTER TABLE/VIEW, we do a conditional write with a checkAndPut to SYSTEM.MUTEX for the key:
> (<physical parent's schema name>, <physical parent's table name>, <name of the column to add/drop>)
> to prevent conflicting modifications between a base table/view and its child views. However, if we create a view with its own new columns, for ex:
> {code:sql}
> CREATE VIEW V1 (NEW_COL1 INTEGER, NEW_COL2 INTEGER) AS SELECT * FROM T1 WHERE B = 10;
> {code}
> we will not do a checkAndPut with the new columns being added to the view (NEW_COL1 and NEW_COL2) thus conflicting concurrent mutations may occur to a parent in this case. 



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