Github user jainaks commented on the issue: https://github.com/apache/spark/pull/21320 > @jainaks What is the value of the Spark SQL configuration setting spark.sql.caseSensitive when you run this query? Also, are you querying the parquet file as part of a Hive metastore table or from a dataframe loaded with the DataFrameReader.parquet method? @mallman "spark.sql.caseSensitive" value is not being set and is left to its default value as "false". We are querying the parquet file from a dataframe. > Hi @jainaks. Thanks for your report. Do you have the same problem running your test with this PR? @mallman Yes, the issue with window functions is reproducible even with this PR.
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