Consider clean up backend code
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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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