Kavinder Dhaliwal created HAWQ-1409:
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Summary: HAWQ send additional header to PXF to indicate aggregate
function type
Key: HAWQ-1409
URL: https://issues.apache.org/jira/browse/HAWQ-1409
Project: Apache HAWQ
Issue Type: Improvement
Components: PXF
Reporter: Kavinder Dhaliwal
Assignee: Ed Espino
Fix For: 2.3.0.0-incubating
PXF can take advantage of some file formats such as ORC and leverage the stats
in the metadata. This means that for some simple aggregate functions like
count, min, max without any complex joins or filters PXF can simply read the
metadata and avoid reading tuples. In order for PXF to know that a query can be
completed via ORC metadata HAWQ must indicate to PXF that the query is an
aggregate query and the type of function
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