Logical optimizer: push up project
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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
Fix For: 0.4.0
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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