Jinfeng Ni created DRILL-776:
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Summary: Support selection vector sv2 and sv4 in partition sender
Key: DRILL-776
URL: https://issues.apache.org/jira/browse/DRILL-776
Project: Apache Drill
Issue Type: Improvement
Reporter: Jinfeng Ni
Assignee: Jinfeng Ni
Currently, Partition sender does not accept sv2 or sv4. If the incoming batch
is sv2 or sv4, a SelectionVectorRemover (SVR) op is required to remove sv2 or
sv4. SVR is essentially doing copy, while partition sender is doing copy as
well. This would introduce unnecessary copy to the whole query process.
In stead, we should enhance Partition sender so that it could take sv2 and sv4
directly, removing the SVR's copy overhead. This would improve the query
performance in terms of cpu and memory consumption.
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