Zhen Wang created SPARK-48922:
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Summary: Optimize complex type insertion performance
Key: SPARK-48922
URL: https://issues.apache.org/jira/browse/SPARK-48922
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.5.0, 4.0.0
Reporter: Zhen Wang
During the upgrade from Spark 3.1.1 to 3.5.0, I found a performance regression
in map type inserts.
There are some extra conversion expressions in project before insert, which
doesn't seem to be always necessary.
{code:java}
map_from_arrays(transform(map_keys(map#516), lambdafunction(lambda key#652,
lambda key#652, false)), transform(map_values(map#516), lambdafunction(lambda
value#654, lambda value#654, false))) AS map#656 {code}
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