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https://issues.apache.org/jira/browse/HIVE-25938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HIVE-25938 started by Alessandro Solimando.
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> Print excluded rules from CBO
> -----------------------------
>
> Key: HIVE-25938
> URL: https://issues.apache.org/jira/browse/HIVE-25938
> Project: Hive
> Issue Type: Improvement
> Components: CBO
> Affects Versions: 4.0.0
> Reporter: Alessandro Solimando
> Assignee: Alessandro Solimando
> Priority: Major
>
> HIVE-25880 introduced a configuration parameter for excluding CBO rules based
> on a regex on their description.
> Calcite logs when a rule is excluded (see
> [AbstractRelOptPlanner.java#L316|https://github.com/apache/calcite/blob/e42b85a45bd16dd58db1546736e653deda5463fe/core/src/main/java/org/apache/calcite/plan/AbstractRelOptPlanner.java#L316]
> and
> [VolcanoRuleCall.java#L169|https://github.com/apache/calcite/blob/e42b85a45bd16dd58db1546736e653deda5463fe/core/src/main/java/org/apache/calcite/plan/volcano/VolcanoRuleCall.java#L169]).
> To ease investigations, this should be complemented by printing the regex
> used (if not blank) in Hive DEBUG logs, and the same in CBO information
> (i.e., EXPLAIN CBO's output).
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