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From "Hong Tang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-653) Make fieldsToRead work in loader
Date Tue, 10 Feb 2009 06:50:59 GMT

    [ https://issues.apache.org/jira/browse/PIG-653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12672176#action_12672176
] 

Hong Tang commented on PIG-653:
-------------------------------

my quibble is that the interface uses null to indicate all required for nested fields, but
uses a concrete class for top level fields. any justification why possible future extensions
are only applicable to top-level fields but not nested fields?

> 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
>
>
> 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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