Samarth Jain created PHOENIX-3599:
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Summary: Take advantage of EncodedQualifiersList when there is no
order by/group by
Key: PHOENIX-3599
URL: https://issues.apache.org/jira/browse/PHOENIX-3599
Project: Phoenix
Issue Type: Task
Reporter: Samarth Jain
Assignee: Samarth Jain
The way we do work in our co-processors today allows us to take advantage of
the EncodedColumnQualifiersCellsList only for cases when there is an order by
or group by on the query (with our without a filter). We should be able to take
advantage of this list in the other cases too. The way our co-processor is
written, it is too late to pass in our custom list to the
regionScanner.nextRaw() call. The list is already created in the HBase code and
passed as a param to the scanner.nextRaw() call. We don't hit this scenario
when we do order by or aggregation because in those cases phoenix does the work
of aggregation or ordering itself and then passes to HBase a materialized
result scanner. To be able to use the custom list implementation, we would need
to enhance our EncodedColumnQualifiersCellsList to accept an additional list.
We will also have to write or modify a co-processor that delegates the calls to
the HRegionScanner by passing it our enhanced EncodedColumnQualifiersCellsList.
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