Github user viirya commented on a diff in the pull request: https://github.com/apache/spark/pull/15090#discussion_r81507325 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala --- @@ -581,6 +581,13 @@ object SQLConf { .timeConf(TimeUnit.MILLISECONDS) .createWithDefault(10L) + val NDV_MAX_ERROR = + SQLConfigBuilder("spark.sql.statistics.ndv.maxError") + .internal() + .doc("The maximum estimation error allowed in HyperLogLog++ algorithm.") --- End diff -- This config comment is not correct. It looks like it will set up the maximum estimation error for HyperLogLog++ algorithm.
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