[Zebra] to support pig projection push down in Zebra
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Key: PIG-1067
URL: https://issues.apache.org/jira/browse/PIG-1067
Project: Pig
Issue Type: New Feature
Affects Versions: 0.4.0
Reporter: Chao Wang
Assignee: Chao Wang
Fix For: 0.6.0
Pig tries to determine which fields in a query script file will be needed and
passes that information to the load function, thereby optimizing the query by
reducing the data to be loaded.
To support this optimization, Zebra needs to implement fieldsToRead method in
TableLoader class to utilize this information. This jira is for this new
feature.
For more information of this optimization on pig side, one can refer to jira:
PIG-653
https://issues.apache.org/jira/browse/PIG-653
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