Oleksiy Dyagilev created SPARK-41554:
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Summary: Decimal.changePrecision produces
ArrayIndexOutOfBoundsException
Key: SPARK-41554
URL: https://issues.apache.org/jira/browse/SPARK-41554
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.3.1
Reporter: Oleksiy Dyagilev
{{Reducing Decimal scale by more than 18 produces exception.}}
{code:java}
Decimal(1, 38, 19).changePrecision(38, 0){code}
{code:java}
java.lang.ArrayIndexOutOfBoundsException: 19
at org.apache.spark.sql.types.Decimal.changePrecision(Decimal.scala:377)
at
org.apache.spark.sql.types.Decimal.changePrecision(Decimal.scala:328){code}
Reproducing with SQL query:
{code:java}
sql("select cast(cast(cast(cast(id as decimal(38,15)) as decimal(38,30)) as
decimal(38,37)) as decimal(38,17)) from range(3)").show{code}
The bug exists for {{Decimal}} that is stored using compact long only, it works
fine with {{Decimal}} that uses {{scala.math.BigDecimal}} internally.
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