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https://issues.apache.org/jira/browse/PIG-1330?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Dai closed PIG-1330.
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> Move pruned schema tracking logic from LoadFunc to core code
> ------------------------------------------------------------
>
> Key: PIG-1330
> URL: https://issues.apache.org/jira/browse/PIG-1330
> Project: Pig
> Issue Type: Improvement
> Components: impl
> Affects Versions: 0.7.0
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Fix For: 0.7.0
>
> Attachments: PIG-1330-1.patch
>
>
> Currently, LoadFunc.getSchema require a schema after column pruning. The good
> side of this is LoadFunc.getSchema matches the data it actually load. This
> gives a sense of consistency. However, by doing this, every LoadFunc need to
> keep track of the columns pruned. This is an unnecessary burden to the
> LoadFunc writer and it is very error proning. This issue is to move this
> logic from LoadFunc to Pig core. LoadFunc.getSchema then only need to return
> original schema even after pruning.
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