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Posted to issues@hawq.apache.org by "Shivram Mani (JIRA)" <ji...@apache.org> on 2016/07/29 22:41:20 UTC
[jira] [Updated] (HAWQ-967) Extend Projection info to include
filter attributes
[ https://issues.apache.org/jira/browse/HAWQ-967?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Shivram Mani updated HAWQ-967:
------------------------------
Description:
HAWQ-927 includes query projection columns as part of the projection info sent from HAWQ to PXF.
For queries where filter attributes are different from projection attributes, PXF would return data with NULL values in the filter attributes.
Due to this HAWQ wouldn't have the necessary data to carry out filters once it receives data back from the underlying external dataset. via PXF
The projection information must be a union of the internal HAWQ projection info and the attributes in the filters.
> Extend Projection info to include filter attributes
> ---------------------------------------------------
>
> Key: HAWQ-967
> URL: https://issues.apache.org/jira/browse/HAWQ-967
> Project: Apache HAWQ
> Issue Type: Sub-task
> Components: PXF
> Reporter: Shivram Mani
> Assignee: Oleksandr Diachenko
> Fix For: backlog
>
>
> HAWQ-927 includes query projection columns as part of the projection info sent from HAWQ to PXF.
> For queries where filter attributes are different from projection attributes, PXF would return data with NULL values in the filter attributes.
> Due to this HAWQ wouldn't have the necessary data to carry out filters once it receives data back from the underlying external dataset. via PXF
> The projection information must be a union of the internal HAWQ projection info and the attributes in the filters.
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