[jira] [Reopened] (OOZIE-244) GH-326: New 'dateAdd' EL function to enable specifying dataset ranges based on date deltas

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

     [ https://issues.apache.org/jira/browse/OOZIE-244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Roman Shaposhnik reopened OOZIE-244:
------------------------------------


> GH-326: New 'dateAdd' EL function to enable specifying dataset ranges based on date deltas
> ------------------------------------------------------------------------------------------
>
>                 Key: OOZIE-244
>                 URL: https://issues.apache.org/jira/browse/OOZIE-244
>             Project: Oozie
>          Issue Type: Bug
>            Reporter: Hadoop QA
>
> Currently dataset ranges are specified as frequency ranges, for many developers it is more natural to think in date ranges rather than frequency ranges.
> For example for an half-hourly dataset, today, the 48 instances for the the last day are expressed as the following range:
> <code>
>     <start-instance>${coord:current(-47)}</start-instance>
>     <end-instance>${coord:current(0)}</end-instance>
> </code>
> With the new 'dateAdd' EL function it would be:
> <code>
>     <start-instance>${coord:dateAdd(coord:nominalTime(), -1, DAY)}</start-instance>
>     <end-instance>${coord:nominalTime()}</end-instance>
> </code>

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