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https://issues.apache.org/jira/browse/CASSANDRA-6757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13911171#comment-13911171
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Edward Capriolo commented on CASSANDRA-6757:
--------------------------------------------

Also take this into account:
https://developers.google.com/protocol-buffers/docs/cpptutorial
{quote}
Required Is Forever You should be very careful about marking fields as 
required. If at some point you wish to stop writing or sending a required 
field, it will be problematic to change the field to an optional field – old 
readers will consider messages without this field to be incomplete and may 
reject or drop them unintentionally. You should consider writing 
application-specific custom validation routines for your buffers instead. Some 
engineers at Google have come to the conclusion that using required does more 
harm than good; they prefer to use only optional and repeated. However, this 
view is not universal. 
{quote}

Having done protobuf and thrift Objects and methods/services I completely agree 
with this advice. Leave yourself the maximum flexibility and limit required 
fields.

> SliceQueryFilter can accept multiple ColumnSlice but not exposed to thrift
> --------------------------------------------------------------------------
>
>                 Key: CASSANDRA-6757
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6757
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Edward Capriolo
>            Assignee: Edward Capriolo
>         Attachments: Cassandra-6757.1.diff
>
>
> Thrift has getSlice() which takes a key and a predicate. SliceQueryFilter can 
> accept multiple ColumnSlice(s). Users should have access to this capability 
> already found in Cassandra.



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