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https://issues.apache.org/jira/browse/CASSANDRA-9928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15526654#comment-15526654
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Donovan Hsieh commented on CASSANDRA-9928:
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Whatever technical issues associated with race condition stated above and limit
to just 1 non-PK column, imho, make MV seriously handicapped. If this
limitation is not removed, I can't see any serious real world applications can
use MV effectively.
> Add Support for multiple non-primary key columns in Materialized View primary
> keys
> ----------------------------------------------------------------------------------
>
> Key: CASSANDRA-9928
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9928
> Project: Cassandra
> Issue Type: Improvement
> Reporter: T Jake Luciani
> Labels: materializedviews
> Fix For: 3.x
>
>
> Currently we don't allow > 1 non primary key from the base table in a MV
> primary key. We should remove this restriction assuming we continue
> filtering out nulls. With allowing nulls in the MV columns there are a lot
> of multiplicative implications we need to think through.
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