PERFORMANCE: dropping the columns as soon as possible
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Key: PIG-466
URL: https://issues.apache.org/jira/browse/PIG-466
Project: Pig
Issue Type: Improvement
Affects Versions: types_branch
Reporter: Olga Natkovich
Fix For: types_branch
Currently, each operator carries all the data until foreach is encountered.
This can cause significant performance degradation.
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