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https://issues.apache.org/jira/browse/SPARK-42399?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17688755#comment-17688755
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Serge Rielau commented on SPARK-42399:
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Adding support is of course best. If it can be done quickly, if not we should
stop the wrong results first.
> CONV() silently overflows returning wrong results
> -------------------------------------------------
>
> Key: SPARK-42399
> URL: https://issues.apache.org/jira/browse/SPARK-42399
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.4.0
> Reporter: Serge Rielau
> Priority: Critical
>
> spark-sql> SELECT
> CONV(SUBSTRING('0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff',
> 3), 16, 10);
> 18446744073709551615
> Time taken: 2.114 seconds, Fetched 1 row(s)
> spark-sql> set spark.sql.ansi.enabled = true;
> spark.sql.ansi.enabled true
> Time taken: 0.068 seconds, Fetched 1 row(s)
> spark-sql> SELECT
> CONV(SUBSTRING('0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff',
> 3), 16, 10);
> 18446744073709551615
> Time taken: 0.05 seconds, Fetched 1 row(s)
> In ANSI mode we should raise an error for sure.
> In non ANSI either an error or a NULL maybe be acceptable.
> Alternatively, of course, we could consider if we can support arbitrary
> domains since the result is a STRING again.
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