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https://issues.apache.org/jira/browse/DRILL-580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jinfeng Ni updated DRILL-580:
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Attachment: (was: DRILL-580.1.patch)
> Drill logical or physical rules should not specify child operand
> ----------------------------------------------------------------
>
> Key: DRILL-580
> URL: https://issues.apache.org/jira/browse/DRILL-580
> Project: Apache Drill
> Issue Type: Bug
> Reporter: Jinfeng Ni
> Assignee: Jinfeng Ni
>
> Most of Drill logical and physical rules (implements RelOptRule) are
> essentially conversion rules. For conversion rule, it's not required to
> specify the child operand in the rule's pattern matching expression. However,
> currently, Drill logical or physical rules specify the child operand. This
> will cause unnecessary rule firing during optiq transformation call, causing
> more planning time.
> In stead, for conversion rule in Drill logical/physical phases, it would be
> sufficient enough to specify the parent operand.
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