Marco Gaido created SPARK-22215:
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Summary: Add a configuration parameter to set max size for
generated classes
Key: SPARK-22215
URL: https://issues.apache.org/jira/browse/SPARK-22215
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.2.0
Reporter: Marco Gaido
SPARK-18016 introduced an arbitrary threshold for the size of a generated class
(https://github.com/apache/spark/blob/83488cc3180ca18f829516f550766efb3095881e/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala#L286).
This value is hardcoded.
Since this is just a guess, in some cases making it smaller can help avoiding
the error of exceeding the maximum number of entries in the Constant Pool.
Then, I suggest to introduce a new configuration parameter, which defaults to
the previous value, but it allows to set this to a smaller one if needed.
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