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Posted to dev@hawq.apache.org by "Kavinder Dhaliwal (JIRA)" <ji...@apache.org> on 2017/03/24 15:15:41 UTC
[jira] [Created] (HAWQ-1409) HAWQ send additional header to PXF to
indicate aggregate function type
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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