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https://issues.apache.org/jira/browse/CALCITE-4081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17159817#comment-17159817
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Chunwei Lei commented on CALCITE-4081:
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I spent some time on it. From what I can see, CAST was removed after reduced by
RexExecutor in RexSimplify. I don't think the fix for it is the same as
CALCITE-4118.
> Round-tripping a DECIMAL literal through Planner -> RelToSqlConverter ->
> Planner throws validation error
> --------------------------------------------------------------------------------------------------------
>
> Key: CALCITE-4081
> URL: https://issues.apache.org/jira/browse/CALCITE-4081
> Project: Calcite
> Issue Type: Bug
> Reporter: Steven Talbot
> Priority: Major
>
> Take the following SQL:
> SELECT CAST('11111111111111111111111111111111.111111' AS DECIMAL(38,6)) AS
> "num"
> And, in the default Calcite SQL dialect with all defaults, send it through
> Planner parse -> valiate -> rel to get a RelNode. The RelNode will have a
> Project with the "111111111111111.11111" literal in there as a RexLiteral
> with Decimal type.
>
> The use RelToSqlConverter to convert that RelNode back to SQL. The SQL now
> looks like
> SELECT 11111111111111111111111111111111.111111 AS "num"
>
> If you attempt to parse and validate that SQL, you get "Numeric literal
> '11111111111111111111111111111111.111111' out of range" throw by
> SqlValidatorImpl.validateLiteral()
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