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https://issues.apache.org/jira/browse/CASSANDRA-11873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15335863#comment-15335863
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Benjamin Lerer commented on CASSANDRA-11873:
--------------------------------------------

bq. it's not easily compatible with making the type byte-comparable

For the moment, I am not even sure what is the best way for ordering the data. 
{{1 month}} and {{31 days}} are not the same thing so how should we sort them? 
Based on the number of month first then on the number of days? The sort result 
might be surprising in some cases :-(

> Add duration type
> -----------------
>
>                 Key: CASSANDRA-11873
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11873
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL
>            Reporter: Benjamin Lerer
>            Assignee: Benjamin Lerer
>              Labels: client-impacting, doc-impacting
>             Fix For: 3.x
>
>
> For CASSANDRA-11871 or to allow queries with {{WHERE}} clause like:
> {{... WHERE reading_time < now() - 2h}}, we need to support some duration 
> type.
> In my opinion, it should be represented internally as a number of 
> microseconds.



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