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From "Richard Ding (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-1454) Consider clean up backend code
Date Wed, 16 Jun 2010 19:31:23 GMT
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

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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