Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/21252#discussion_r186739581
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -1238,6 +1238,14 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+ val COMBINE_LIMIT_AFTER_SORT_THRESHOLD =
+ buildConf("spark.sql.execution.combineLimitAfterSortThreshold")
+ .internal()
+ .doc("In sql like 'select x from t order by y limit m', if m is
under this threshold, " +
--- End diff --
-> `SQL` and -> `'SELECT x FROM t ORDER BY y LIMIT m'` while we are here
..
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