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https://issues.apache.org/jira/browse/CALCITE-7145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18035418#comment-18035418
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Julian Hyde commented on CALCITE-7145:
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If someone really wants to simplify "1 / 0" (using the unsafe divide operator)
then I wouldn't object if they simplified it to "throw DivideByZero".
Similarly, you could simplify "(x / y) IS NULL" (again, unsafe divide) to "x IS
NULL OR y IS NULL OR ((x / y); FALSE)" where ";" is a (new) sequence operator
that evaluates all operands, aborts if any one of them throws, and returns the
result of the last operand.
> RexSimplify should not simplify IS NULL(10/0)
> ---------------------------------------------
>
> Key: CALCITE-7145
> URL: https://issues.apache.org/jira/browse/CALCITE-7145
> Project: Calcite
> Issue Type: Bug
> Reporter: Thomas Rebele
> Assignee: Thomas Rebele
> Priority: Major
> Labels: pull-request-available
>
> RexSimplify incorrectly simplifies {{IS NULL(10/0)}} to false and {{IS NOT
> NULL(10,0)}} to true
> In other DBMS it's either the inverse (sqlite, MySQL, MariaDB), or they throw
> an exception in both cases (Oracle, Postgres). The behavior was also
> mentioned in a comment on CALCITE-3368.
> Is it right that throwing an exception during query execution is the expected
> behavior according to the SQL standard?
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