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https://issues.apache.org/jira/browse/IMPALA-7923?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong updated IMPALA-7923:
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Issue Type: Improvement (was: Bug)
> DecimalValue should be marked as packed
> ---------------------------------------
>
> Key: IMPALA-7923
> URL: https://issues.apache.org/jira/browse/IMPALA-7923
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Affects Versions: Impala 3.1.0
> Reporter: Tim Armstrong
> Priority: Major
>
> IMPALA-7473 was a symptom of a more general problem that DecimalValue is not
> guaranteed to be aligned by the Impala runtime, but the class is not marked
> as packed and, under some circumstances, GCC will emit code for aligned loads
> to value_ when value_ is an int128.
> Testing helps confirm that the compiler does not emit the problematic loads
> in practice, but it would be better to mark the struct as packed.
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