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https://issues.apache.org/jira/browse/CALCITE-5557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17698606#comment-17698606
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Oliver Lee commented on CALCITE-5557:
-------------------------------------
I have been investigating the test failures:
[https://github.com/apache/calcite/actions/runs/4370214681/jobs/7644894373]
Specifically this case
[https://github.com/apache/calcite/blob/main/testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java#L5526]
, it seems that on main branch, {{trunc(cast(42.345 as decimal(2,3)),2)}}
actually throws an exception because it fails this check:
https://github.com/apache/calcite/blob/main/core/src/main/java/org/apache/calcite/sql/type/SqlTypeUtil.java#L1809,
however the exceptions were previously just swallowed
> Add SAFE_CAST (BigQuery compatibility)
> --------------------------------------
>
> Key: CALCITE-5557
> URL: https://issues.apache.org/jira/browse/CALCITE-5557
> Project: Calcite
> Issue Type: New Feature
> Reporter: Oliver Lee
> Assignee: Oliver Lee
> Priority: Minor
>
> Implement SAFE_CAST per BigQuery specifications
> [https://cloud.google.com/bigquery/docs/reference/standard-sql/functions-and-operators#safe_casting]
> Equivalent to CAST(), except it will return {{null}} instead of throwing an
> exception if the casting fails.
> {quote}SAFE_CAST('1' as INT) -> 1
> SAFE_CAST('a' as INT) -> NULL
> SAFE_CAST("2022-12-12" as DATE) -> DATE('2022-12-12')
> SAFE_CAST(1 AS BOOLEAN) -> true
> SAFE_CAST('A' AS BOOLEAN) -> null
> {quote}
>
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