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From "Richard Ding (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-1454) Consider clean up backend code
Date Fri, 25 Jun 2010 17:13:58 GMT

    [ https://issues.apache.org/jira/browse/PIG-1454?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12882640#action_12882640
] 

Richard Ding commented on PIG-1454:
-----------------------------------

I've run the core tests manually and they passed.

> 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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