Marco Gaido created SPARK-22520:
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Summary: Support code generation also for complex CASE WHEN
Key: SPARK-22520
URL: https://issues.apache.org/jira/browse/SPARK-22520
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.3.0
Reporter: Marco Gaido
Priority: Minor
Code generation is disabled for CaseWhen when the number of branches is higher
than {{spark.sql.codegen.maxCaseBranches}} (which defaults to 20). This was
done in SPARK-13242 to prevent the well known 64KB method limit exception.
This tickets proposes to support code generation also in those cases (without
causing exceptions of course). As a side effect, we could get rid of the
{{spark.sql.codegen.maxCaseBranches}} configuration.
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