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Posted to issues@calcite.apache.org by "Julian Hyde (JIRA)" <ji...@apache.org> on 2017/06/02 04:57:05 UTC

[jira] [Created] (CALCITE-1825) Rule to split a Project into expressions that can and cannot be pushed into Druid

Julian Hyde created CALCITE-1825:
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             Summary: Rule to split a Project into expressions that can and cannot be pushed into Druid
                 Key: CALCITE-1825
                 URL: https://issues.apache.org/jira/browse/CALCITE-1825
             Project: Calcite
          Issue Type: Bug
          Components: druid
            Reporter: Julian Hyde
            Assignee: Julian Hyde


Create a rule that can split the expressions in a Project (and optionally also a Filter) into pieces that can be pushed down to Druid and pieces that cannot. 

There is class CalcRelSplitter that can split expressions in a Project and Filter according to specified criteria. An existing rule, ProjectToWindowRule, that uses a sub-class of CalcRelSplitter. This rule could be built along similar lines.



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