[jira] [Created] (SPARK-40089) Doring of at least Decimal(20, 2) fails for some values near the max.

["Robert Joseph Evans (Jira)" <ji...@apache.org>]

Robert Joseph Evans created SPARK-40089:
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             Summary: Doring of at least Decimal(20, 2) fails for some values near the max.
                 Key: SPARK-40089
                 URL: https://issues.apache.org/jira/browse/SPARK-40089
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 3.3.0, 3.2.0, 3.4.0
            Reporter: Robert Joseph Evans


I have been doing some testing with Decimal values for the RAPIDS Accelerator for Apache Spark. I have been trying to add in new corner cases and when I tried to enable the maximum supported value for a sort I started to get failures.  On closer inspection it looks like the CPU is sorting things incorrectly.  Specifically anything that is "999999999999999999.50" or above is placed as a chunk in the wrong location in the outputs.

 In local mode with 12 tasks.
{code:java}
spark.read.parquet("input.parquet").orderBy(col("a")).collect.foreach(System.err.println) {code}
 

Here you will notice that the last entry printed is {{[999999999999999999.49]}}, and {{[999999999999999999.99]}} is near the top near {{[-999999999999999999.99]}}





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