Github user seancxmao commented on the issue: https://github.com/apache/spark/pull/22184 > My proposal is, parquet data source should provide an option(not SQL conf) to ... You mentioned this option is not SQL conf. Could you give me some advice about where this option should be defined? I just thought to define this option in SQLConf as something like `spark.sql.parquet.onDuplicatedFields` = FAIL, FIRST_MATCH, as I see bunch of options starting with `spark.sql.parquet` in SQLConf.
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