MinJi Kim created CALCITE-1289:
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Summary: RexUtil.simplifyCase() should account for nullability
Key: CALCITE-1289
URL: https://issues.apache.org/jira/browse/CALCITE-1289
Project: Calcite
Issue Type: Bug
Components: core
Reporter: MinJi Kim
Assignee: Julian Hyde
RexUtil.simplify() returns incorrect type information if the RexNode is a
CASE(CONDITION, TRUE, FALSE). In this case, the CASE RexNode is a Boolean with
isNullable == false. But, with the simplify, RexUtil.simplify returns
CONDITION. When CONDITION has isNullable == true, the returned RexNode does
not match the row type and fails to transform.
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