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https://issues.apache.org/jira/browse/CASSANDRA-4004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13254139#comment-13254139
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Jonathan Ellis commented on CASSANDRA-4004:
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bq. The idea of my patch is that adding DESC to a field in a table declaration
changes the order of records logically
That makes sense for the old world of ReversedType and {{reversed}} slice flag,
but I don't think it makes sense for CQL. When I ask for "ORDER BY X DESC" I
expect the largest X first, period. So a table declaration like this makes
sense as an optimization if DESC is your most frequent query type, but it
shouldn't change the semantics of the query itself.
> Add support for ReversedType
> ----------------------------
>
> Key: CASSANDRA-4004
> URL: https://issues.apache.org/jira/browse/CASSANDRA-4004
> Project: Cassandra
> Issue Type: Sub-task
> Components: API
> Reporter: Sylvain Lebresne
> Assignee: Sylvain Lebresne
> Priority: Trivial
> Fix For: 1.1.1
>
> Attachments: 4004.txt
>
>
> It would be nice to add a native syntax for the use of ReversedType. I'm sure
> there is anything in SQL that we inspired ourselves from, so I would propose
> something like:
> {noformat}
> CREATE TABLE timeseries (
> key text,
> time uuid,
> value text,
> PRIMARY KEY (key, time DESC)
> )
> {noformat}
> Alternatively, the DESC could also be put after the column name definition
> but one argument for putting it in the PK instead is that this only apply to
> keys.
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