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Date: Fri, 6 Apr 2012 09:05:38 +0000 (UTC)
From: "Prashant Kommireddi (Updated) (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (PIG-2600) Better Map support
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     [ https://issues.apache.org/jira/browse/PIG-2600?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Prashant Kommireddi updated PIG-2600:
-------------------------------------

    Attachment: PIG-2600_4.patch

Jon, adding a new patch as per our previous discussion (changing return type to bags). I have also added test cases for various primitive types being Map values. 
                
> Better Map support
> ------------------
>
>                 Key: PIG-2600
>                 URL: https://issues.apache.org/jira/browse/PIG-2600
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Jonathan Coveney
>            Assignee: Prashant Kommireddi
>             Fix For: 0.11
>
>         Attachments: PIG-2600.patch, PIG-2600_2.patch, PIG-2600_3.patch, PIG-2600_4.patch
>
>
> It would be nice if Pig played better with Maps. To that end, I'd like to add a lot of utility around Maps.
> - TOBAG should take a Map and output {(key, value)}
> - TOMAP should take a Bag in that same form and make a map.
> - KEYSET should return the set of keys.
> - VALUESET should return the set of values.
> - VALUELIST should return the List of values (no deduping).
> - INVERSEMAP would return a Map of values => the set of keys that refer to that Key
> This would all be pretty easy. A more substantial piece of work would be to make Pig support non-String keys (this is especially an issue since UDFs and whatnot probably assume that they are all Integers). Not sure if it is worth it.
> I'd love to hear other things that would be useful for people!

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