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Posted to dev@drill.apache.org by "Jinfeng Ni (JIRA)" <ji...@apache.org> on 2014/04/27 23:58:15 UTC

[jira] [Created] (DRILL-580) Drill logical or physical rules should not specify child operand

Jinfeng Ni created DRILL-580:
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             Summary: 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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