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https://issues.apache.org/jira/browse/CALCITE-5766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17730310#comment-17730310
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Julian Hyde edited comment on CALCITE-5766 at 6/7/23 11:28 PM:
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Oops, I see this is {{SAFE_NEGATE}} not {{SAFE_MULTIPLY}}.
In {{SAFE_MULTIPLY}}, note that every case where {{SAFE_NEGATE\(x)}} returns
NULL is also a case where {{SAFE_MULTIPLY(x, -1)}} and {{SAFE_MULTIPLY(-1, x)}}
should return null.
was (Author: julianhyde):
Oops, I see this is {{SAFE_NEGATE}} not {{SAFE_MULTIPLY}}.
In {{SAFE_MULTIPLY}}, note that every case where {{SAFE_NEGATE(x)}} returns
NULL is also a case where {{SAFE_MULTIPLY(x, -1)}} and {{SAFE_MULTIPLY(-1, x)}}
should return null.
> Implement SAFE_NEGATE function (enabled for BigQuery)
> -----------------------------------------------------
>
> Key: CALCITE-5766
> URL: https://issues.apache.org/jira/browse/CALCITE-5766
> Project: Calcite
> Issue Type: Sub-task
> Reporter: Tanner Clary
> Assignee: Tanner Clary
> Priority: Major
> Labels: pull-request-available
>
> Add support for SAFE_NEGATE in BigQuery.
> SAFE_NEGATE: Equivalent to the unary minus operator (-), but returns NULL if
> overflow occurs.
> Example #1: {{SELECT SAFE_NEGATE(3)}} would return {{-3}}.
> Example #2: {{SELECT SAFE_NEGATE(-9223372036854775808)}} would return
> {{NULL}} because of overflow.
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