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https://issues.apache.org/jira/browse/CALCITE-2608?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltan Haindrich moved HIVE-20689 to CALCITE-2608:
--------------------------------------------------
Workflow: jira (was: no-reopen-closed, patch-avail)
Issue Type: Improvement (was: Bug)
Key: CALCITE-2608 (was: HIVE-20689)
Project: Calcite (was: Hive)
> Simplifying using predicates should consider not equals in case its a
> predicate
> -------------------------------------------------------------------------------
>
> Key: CALCITE-2608
> URL: https://issues.apache.org/jira/browse/CALCITE-2608
> Project: Calcite
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
>
> Right now simplifyUsingPredicates bails out for [all <>
> comparisions|https://github.com/apache/calcite/blob/c39bfaa02a06ac91575076a6e74f29863923f5eb/core/src/main/java/org/apache/calcite/rex/RexSimplify.java#L1050];
> however if it's already an explicit predicate (or its negated one); then it
> could be demoted to:
> {code}
> x IS NOT NULL or null
> {code}
> which could be further simplified in most cases..
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