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https://issues.apache.org/jira/browse/CALCITE-5343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17623381#comment-17623381
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Julian Hyde commented on CALCITE-5343:
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I think what you really want is to change the semantics of division. A change
in semantics might imply a change in data type.
Can you search for {{RelDataTypeSystem}} and find related jira cases?
> Type of division operator
> -------------------------
>
> Key: CALCITE-5343
> URL: https://issues.apache.org/jira/browse/CALCITE-5343
> Project: Calcite
> Issue Type: Bug
> Components: core
> Reporter: Mihai Budiu
> Priority: Minor
>
> The Calcite type checker assigns a type of INTEGER (not nullable) to the
> DIVIDE RexCall in the following statement: `SELECT 1/0`. Some databases, such
> as MySQL, evaluate this expression to NULL.
> This result is obtained even when using SqlConformanceEnum.MYSQL_5 for the
> parser and the validator.
> My question is whether there is some other way to influence how type
> inference is performed for division.
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