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https://issues.apache.org/jira/browse/CALCITE-978?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15009420#comment-15009420
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Julian Hyde commented on CALCITE-978:
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One approach would be to supply a {{Predicate<RelNode>}} that becomes part of
the {{RelOptRuleOperand}} created in the rule constructor.
> Make ReduceExpressionsRule extensible to transform false filter in
> schema-on-read case
> ---------------------------------------------------------------------------------------
>
> Key: CALCITE-978
> URL: https://issues.apache.org/jira/browse/CALCITE-978
> Project: Calcite
> Issue Type: Bug
> Reporter: Jinfeng Ni
> Assignee: Julian Hyde
> Labels: drill
>
> This comes from a commit in Drill's forked Calcite
> (https://github.com/dremio/calcite/commit/a29f007f4f4017368b6f41bf8c3aba4490a1cee8).
> ReduceExpressionRule will transform a false filter into VALUES with empty
> input. This only works in the case of schema-aware scenario. In
> schema-on-read scenario like Drill, VALUES would not provide the schema type
> at the planning time; schema has to be propagate during execution time.
> We should allow ReduceExpressionRule extensible so that different behavior
> would be allowed to handle false filter in both schema-aware case and
> schema-on-read case.
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