Github user liancheng commented on a diff in the pull request:
https://github.com/apache/spark/pull/8125#discussion_r36847448
--- Diff: sql/core/src/main/scala/org/apache/spark/sql/SQLConf.scala ---
@@ -420,6 +420,18 @@ private[spark] object SQLConf {
val USE_SQL_AGGREGATE2 = booleanConf("spark.sql.useAggregate2",
defaultValue = Some(true), doc = "<TODO>")
+ val COMBINE_SMALL_FILE = booleanConf(
+ "spark.sql.small.file.combine",
+ defaultValue = Some(true),
+ isPublic = false
+ )
--- End diff --
This option is made private and default to true, which assumes that reading
small files is the common case, which is neither true nor recommended.
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