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https://issues.apache.org/jira/browse/CALCITE-1653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15878802#comment-15878802
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Remus Rusanu commented on CALCITE-1653:
---------------------------------------
Turns out traversing that stack is not hard at all.
{{ReduceExpressionsRule.reduceExpressions}} can get the executor from the
{{RelNode}} and then extending {{RexUtil$ExprSimplifier}} to take an executor
is trivial. I'm testing it now and it looks promising.
> Allow for custom RelOptPlanner.Executor in RexUtil.simplify
> -----------------------------------------------------------
>
> Key: CALCITE-1653
> URL: https://issues.apache.org/jira/browse/CALCITE-1653
> Project: Calcite
> Issue Type: Bug
> Reporter: Remus Rusanu
> Assignee: Julian Hyde
>
> {{RexUtil.simplify}} (and derivatives) use a default {{EXECUTOR}} for
> evaluating literals and expression in {{simplifyCast}}. This causes value
> differences from Hive, triggering issues like CALCITE-1650, CALCITE-1651.
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