Zoltan Haindrich created CALCITE-2240:
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Summary: Predicate push into CASE statment doesn't happen in some
cases
Key: CALCITE-2240
URL: https://issues.apache.org/jira/browse/CALCITE-2240
Project: Calcite
Issue Type: Bug
Reporter: Zoltan Haindrich
Assignee: Julian Hyde
[CaseShuttle|https://github.com/apache/calcite/blob/8139acb78b100483fbafb078fb82d07f921abef0/core/src/main/java/org/apache/calcite/rel/rules/ReduceExpressionsRule.java#L562]
may make the optimization but the functions return value doesn't depend on
that.
For the following query the =1 is not pushed into the case.
{code}
select empno from emp where case when sal > 1000 then empno else sal end = 1
{code}
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