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https://issues.apache.org/jira/browse/CALCITE-5343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17794459#comment-17794459
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Mihai Budiu commented on CALCITE-5343:
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I will close this issue. This seems to be by design.
Unfortunately the safe_divide function cannot be used for this purpose, since
it only takes BIGINT arguments.
> 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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