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https://issues.apache.org/jira/browse/FLINK-40920?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18124429#comment-18124429
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Sergey Nuyanzin commented on FLINK-40920:
-----------------------------------------
Merged as
[149dfbf2a6d1bff850e068869bd13ef31e37746a|https://github.com/apache/flink/commit/149dfbf2a6d1bff850e068869bd13ef31e37746a]
> SELECT 1 / (2 + 3) fails with ClassCastException: RexCall cannot be cast to
> RexLiteral in ExpressionReducer
> -----------------------------------------------------------------------------------------------------------
>
> Key: FLINK-40920
> URL: https://issues.apache.org/jira/browse/FLINK-40920
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 2.3.0
> Reporter: Yaoxuan Wu
> Assignee: Yaoxuan Wu
> Priority: Major
> Labels: pull-request-available
>
> {{*SELECT 1 / (2 + 3)*}}
> {{*SELECT 1 / (2 * 3)*}}
> {{*SELECT 1.0 / (2 * 3)*}}
> all fail during optimization:
> {code:java}
> java.lang.ClassCastException: class org.apache.calcite.rex.RexCall cannot be
> cast to class org.apache.calcite.rex.RexLiteral at
> org.apache.flink.table.planner.codegen.ExpressionReducer.$anonfun$skipAndValidateExprs$2(ExpressionReducer.scala:289)
> at
> org.apache.flink.table.planner.codegen.ExpressionReducer.skipAndValidateExprs(ExpressionReducer.scala:264)
> at
> org.apache.flink.table.planner.codegen.ExpressionReducer.reduce(ExpressionReducer.scala:72)
> at
> org.apache.calcite.rel.rules.ReduceExpressionsRule.reduceExpressionsInternal(ReduceExpressionsRule.java:774)
> {code}
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