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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