[jira] [Created] (SPARK-42399) CONV() silently overflows returning wrong results

["Serge Rielau (Jira)" <ji...@apache.org>]

Serge Rielau created SPARK-42399:
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             Summary: CONV() silently overflows returning wrong results
                 Key: SPARK-42399
                 URL: https://issues.apache.org/jira/browse/SPARK-42399
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 3.4.0
            Reporter: Serge Rielau


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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