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From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-11873) Add duration type
Date Fri, 17 Jun 2016 14:34:05 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-11873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15336215#comment-15336215
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Sylvain Lebresne commented on CASSANDRA-11873:
----------------------------------------------

bq. I understand the rational of the suggestions but I would be in favor of keeping what I
proposed.

I concur (and will note that we're really just following the [internal standard for those
unit|https://en.wikipedia.org/wiki/Second#SI_multiples], which weigths more in my book than
any particular database choices).

That said, I do agree that making the unit case-insensitive would be nice (because most stuffs
in CQL as case-insensitive, and because having the difference been only base on the case is
error prone). Which is why I would personally suggest using {{mo}} for months (I guess you
could alternatively keep {{m}} for months and force {{min}} for {{minutes}}, but I think it's
way more common to abbreviate minutes than month (in life in general) so I think using something
slightly irregular for month is less surprising).

> 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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