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https://issues.apache.org/jira/browse/PIG-777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12704161#action_12704161
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David Ciemiewicz commented on PIG-777:
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Gunther, thanks for adding the informational output about removing the 
unnecessary load statement.

> Code refactoring: Create optimization out of store/load post processing code
> ----------------------------------------------------------------------------
>
>                 Key: PIG-777
>                 URL: https://issues.apache.org/jira/browse/PIG-777
>             Project: Pig
>          Issue Type: Improvement
>            Reporter: Gunther Hagleitner
>         Attachments: log_message.patch
>
>
> The postProcessing method in the pig server checks whether a logical graph 
> contains stores to and loads from the same location. If so, it will either 
> connect the store and load, or optimize by throwing out the load and 
> connecting the store predecessor with the successor of the load.
> Ideally the introduction of the store and load connection should happen in 
> the query compiler, while the optimization should then happen in an separate 
> optimizer step as part of the optimizer framework.

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