Chao Shi created CRUNCH-315:
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Summary: Empty collection
Key: CRUNCH-315
URL: https://issues.apache.org/jira/browse/CRUNCH-315
Project: Crunch
Issue Type: New Feature
Reporter: Chao Shi
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 idea.
[1]
http://mail-archives.apache.org/mod_mbox/crunch-dev/201312.mbox/%3CBLU0-SMTP1337A04FAC6B5F497F7473EADC10%40phx.gbl%3E
[2]
http://mail-archives.apache.org/mod_mbox/crunch-dev/201312.mbox/%3CCAH29n6MbSK9gapoC2DgVnhofjAobyasCuZh_0475DuSajV%3DCPg%40mail.gmail.com%3E
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