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https://issues.apache.org/jira/browse/CALCITE-1289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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MinJi Kim updated CALCITE-1289:
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Description: 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 (vice versa). (was:
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.)
> 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 (vice versa).
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