[jira] [Commented] (CASSANDRA-2710) Get multiple column ranges

["Vijay (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-2710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13434802#comment-13434802 ] 

Vijay commented on CASSANDRA-2710:
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It has a lot of potential (Provides flexibility) while modeling wide rows with composite columns. Should we at-least support it via thrift?
                
> Get multiple column ranges
> --------------------------
>
>                 Key: CASSANDRA-2710
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2710
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: API, Core
>            Reporter: David Boxenhorn
>            Assignee: Vijay
>              Labels: compositeColumns, cql
>         Attachments: 0001-2710-multiple-column-ranges-cql.patch, 0001-2710-multiple-column-ranges-thrift.patch
>
>
> I have replaced all my super column families with regular column families using composite columns. I have easily been able to support all previous functionality (I don't need range delete) except for one thing: getting multiple super columns with a single access. For this, I would need to get multiple ranges. (I can get multiple columns, or a single range, but not multiple ranges.) 
> For example, I used to have
> [<superColumnName1>,<subColumnName1..N>],[<superColumnName2>,<subColumnName1..N>]
> and I could get superColumnName1, superColumnName2
> Now I have
> [<len><superColumnName1>0<len><subColumnName1>..<len><superColumnName1>0<len><subColumnNameN>],[<len><superColumnName2>0<len><subColumnName1>..<len><superColumnName2>0<len><subColumnNameN>]
> and I need to get superColumnName1..superColumnName1+, superColumnName2..superColumnName2+
> to get the same functionality
> I would like the clients to support this functionality, e.g. Hector to have .setRages parallel to .setColumnNames 
> and for CQL to support a syntax like 
> SELECT [FIRST N] [REVERSED] name1..nameN1, name2..nameN2... FROM ...

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