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https://issues.apache.org/jira/browse/SYSTEMML-905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm updated SYSTEMML-905:
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Description:
There is potential for incorrect unary aggregates over compressed matrices in
the presence of a mix of OLE/RLE groups with existing UC group. Since we
directly invoke uncompressed operations, the UC group computation resets the
partial aggregates computed over predecessor groups.
The fix should invoke uncompressed operations first before processing OLE and
RLE groups.
> Incorrect compressed unary aggregate w/ existing uc group
> ---------------------------------------------------------
>
> Key: SYSTEMML-905
> URL: https://issues.apache.org/jira/browse/SYSTEMML-905
> Project: SystemML
> Issue Type: Bug
> Components: Runtime
> Reporter: Matthias Boehm
>
> There is potential for incorrect unary aggregates over compressed matrices in
> the presence of a mix of OLE/RLE groups with existing UC group. Since we
> directly invoke uncompressed operations, the UC group computation resets the
> partial aggregates computed over predecessor groups.
> The fix should invoke uncompressed operations first before processing OLE and
> RLE groups.
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