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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