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From "Josh Wills (JIRA)" <>
Subject [jira] [Resolved] (CRUNCH-315) Empty collection
Date Sun, 29 Dec 2013 19:54:50 GMT


Josh Wills resolved CRUNCH-315.

       Resolution: Fixed
    Fix Version/s: 0.8.3

Pushed to master.

I'm inclined to say we add support for it only if/when someone brings a compelling use case
for it, primarily because it's not a totally trivial change and (as Micah indicated) there
are other mechanisms in place to do it when it's necessary.

> Empty collection
> ----------------
>                 Key: CRUNCH-315
>                 URL:
>             Project: Crunch
>          Issue Type: New Feature
>            Reporter: Chao Shi
>             Fix For: 0.10.0, 0.8.3
>         Attachments: CRUNCH-315.patch
> As discussed in the mailing list [1] and [2], I'd like to add an empty collection feature.
On the API side, I think we can add a new method in Pipeline to create an empty collection.
The collection should be a subclass of PCollection and behaves like other normal PCollecitons.
There are also some optimization points that Josh mentioned in [2].
> I haven't thought it clearly. Just put a ticket here and see if anyone else has a better
> [1]
> [2]

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