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https://issues.apache.org/jira/browse/PIG-922?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Dai updated PIG-922:
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Attachment: PIG-922-p2_preview.patch
Include initial patch for phase 2 (inclusive). Need more test, but upload patch
first for comments.
This patch include these codes:
1. Prune inputs for relational operator
2. Recursively prune inputs from root of a logical plan
3. PigStorage with input pruning
Yet to do:
1. Map key pruning for a map input
2. Transformation rule to collect required fields and prune unused columns down
> Logical optimizer: push up project
> ----------------------------------
>
> Key: PIG-922
> URL: https://issues.apache.org/jira/browse/PIG-922
> Project: Pig
> Issue Type: New Feature
> Components: impl
> Affects Versions: 0.3.0
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Attachments: PIG-922-p1_0.patch, PIG-922-p1_1.patch,
> PIG-922-p1_2.patch, PIG-922-p1_3.patch, PIG-922-p1_4.patch,
> PIG-922-p2_preview.patch
>
>
> This is a continuation work of
> [PIG-697|https://issues.apache.org/jira/browse/PIG-697]. We need to add
> another rule to the logical optimizer: Push up project, ie, prune columns as
> early as possible.
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