[
https://issues.apache.org/jira/browse/HIVE-22978?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jesus Camacho Rodriguez updated HIVE-22978:
-------------------------------------------
Status: Patch Available (was: In Progress)
> Fix decimal precision and scale inference for aggregate rewriting in Calcite
> ----------------------------------------------------------------------------
>
> Key: HIVE-22978
> URL: https://issues.apache.org/jira/browse/HIVE-22978
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
>
> Calcite rules can do rewritings of aggregate functions, e.g., {{avg}} into
> {{sum/count}}. When type of {{avg}} is decimal, inference of intermediate
> precision and scale for the division is not done correctly. The reason is
> that we miss support for some types in method {{getDefaultPrecision}} in
> {{HiveTypeSystemImpl}}. Additionally, {{deriveSumType}} should be overridden
> in {{HiveTypeSystemImpl}} to abide by the Hive semantics for sum aggregate
> type inference.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
