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https://issues.apache.org/jira/browse/PIG-1454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Richard Ding updated PIG-1454:
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Attachment: PIG-1454.patch
> Consider clean up backend code
> ------------------------------
>
> Key: PIG-1454
> URL: https://issues.apache.org/jira/browse/PIG-1454
> Project: Pig
> Issue Type: Improvement
> Components: impl
> Affects Versions: 0.7.0
> Reporter: Richard Ding
> Assignee: Richard Ding
> Fix For: 0.8.0
>
> Attachments: PIG-1454.patch
>
>
> Prior to 0.7, Pig had its own local execution mode, in addition to hadoop map
> reduce execution mode. To support these two different execution modes, Pig
> implemented an abstraction layer with a set of interfaces and abstract
> classes. Pig 0.7 replaced the local mode with hadoop local mode and made
> this abstraction layer redundant.
> Our goal is to remove those extra code. But we need also keep code backward
> compatible since some interfaces are exposed by top-level API.
> So we propose the first steps:
> * Deprecate methods on FileLocalizer that have DataStorage as parameter.
> * Remove ExecPhysicalOperator, ExecPhysicalPlan, ExecScopedLogicalOperator,
> ExecutionEngine and util/ExecTools from
> org.apache.pig.backend.executionengine package.
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