Github user gatorsmile commented on the issue: https://github.com/apache/spark/pull/16330 The extra flag is needed only when using Hive metastore. How about renaming the flag to `spark.sql.hive.metastore.default.derby.dir`? The value is unable to be changed at runtime. Thus, the best home should be `object StaticSQLConf`. So far, maybe we can set it as an internal configuration? cc @cloud-fan @yhuai
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