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https://issues.apache.org/jira/browse/CALCITE-5591?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17727759#comment-17727759
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Dan Zou commented on CALCITE-5591:
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[~tanclary] The point is we do not enough information to determine the real
return type in SqlFunctions, and determine whether the overflow occurs {*}based
on the return type{*}. I find you have opened a PR for SAFE_MULTIPLY, we could
discuss the details in this PR.
> Implement BigQuery functions SAFE_ADD, SAFE_SUBTRACT, SAFE_MULTIPLY,
> SAFE_DIVIDE and SAFE_NEGATE
> ------------------------------------------------------------------------------------------------
>
> Key: CALCITE-5591
> URL: https://issues.apache.org/jira/browse/CALCITE-5591
> Project: Calcite
> Issue Type: New Feature
> Reporter: Dan Zou
> Assignee: Dan Zou
> Priority: Major
>
> Add support for SAFE_ADD, SAFE_SUBTRACT, SAFE_MULTIPLY, SAFE_DIVIDE and
> SAFE_NEGATE in BigQuery.
> Function description:
> * SAFE_ADD: Equivalent to the addition operator '+', but returns NULL if
> overflow occurs.
> * SAFE_SUBTRACT: Returns the result of Y subtracted from X. Equivalent to the
> subtraction operator '-', but returns NULL if overflow occurs.
> * SAFE_MULTIPLY: Equivalent to the multiplication operator '*', but returns
> NULL if overflow occurs.
> * SAFE_DIVIDE: Equivalent to the division operator '/ ', but returns NULL if
> an error occurs, such as a division by zero error.
> * SAFE_NEGATE: Equivalent to the unary minus operator '-', but returns NULL
> if overflow occurs.
> See more details in [BigQuery
> Doc|https://cloud.google.com/bigquery/docs/reference/standard-sql/functions-and-operators#safe_divide]
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