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From "Alan Gates (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-734) Non-string keys in maps
Date Wed, 25 Mar 2009 20:03:57 GMT
Non-string keys in maps

                 Key: PIG-734
                 URL: https://issues.apache.org/jira/browse/PIG-734
             Project: Pig
          Issue Type: Bug
    Affects Versions: 1.0.0
            Reporter: Alan Gates
            Assignee: Alan Gates
            Priority: Minor
             Fix For: 1.1.0

With the addition of types to pig, maps were changed to allow any atomic type to be a key.
 However, in practice we do not see people using keys other than strings.  And allowing multiple
types is causing us issues in serializing data (we have to check what every key type is) and
in the design for non-java UDFs (since many scripting languages include associative arrays
such as Perl's hash).

So I propose we scope back maps to only have string keys.  This would be a non-compatible
change.  But I am not aware of anyone using non-string keys, so hopefully it would have little
or no impact.

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