Pradeep Kamath updated PIG-653:

    Attachment: PIG-653-3-proposal.txt

Introduced a boolean into RequiredField to indicate if all sub fields are 
required. The reason I feel we cannot use RequiredFieldList internally in 
RequiredField to represent the subfields is that REquiredFieldList is meant to 
be a class for communicating about the top level required fields. In the future 
the extensions added to it may only make sense at the top level and hence would 
not fit well for the sub fields.

I have attached the third version of the proposal with the above changes and 
have explicitly listed the getters in the classes since these will be used by 

> Make fieldsToRead work in loader
> --------------------------------
>                 Key: PIG-653
>                 URL: https://issues.apache.org/jira/browse/PIG-653
>             Project: Pig
>          Issue Type: New Feature
>            Reporter: Alan Gates
>            Assignee: Pradeep Kamath
>         Attachments: PIG-653-2.comment, PIG-653-3-proposal.txt
> Currently pig does not call the fieldsToRead function in LoadFunc, thus it 
> does not provide information to load functions on what fields are needed.  We 
> need to implement a visitor that determines (where possible) which fields in 
> a file will be used and relays that information to the load function.

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