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From "Benjamin Lerer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-11873) Add duration type
Date Mon, 23 May 2016 09:25:12 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-11873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15296147#comment-15296147
] 

Benjamin Lerer commented on CASSANDRA-11873:
--------------------------------------------

One interesting question is what type of text representation do we want to support for duration.
The simplest approach would be to support only a number and a time unit: days ({{d}}), hours
({{h}}), minutes ({{m}}), seconds ({{s}}), milliseconds ({{ms}}) and micro seconds ({{┬Ás}}).
A slightly more complex one would be to allow the combination of multiple simple expressions
like: 2d8h (2 days and 8 hours).

> 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
>             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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