Github user concretevitamin commented on a diff in the pull request:
https://github.com/apache/spark/pull/1127#discussion_r13989753
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins.scala ---
@@ -245,6 +245,74 @@ case class LeftSemiJoinBNL(
}
}
+
+
+
+/*
+LeftSemiBloomFilterBroadcastJoin
+Sometimes the semijoin's broadcast table can't fit memory.So we can make
it as Bloomfilter to reduce the space
+and then broadcast it do the mapside join
+THe bloomfilter use Shark's BloomFilter class implementation.
+*/
+
+/**
+ * :: DeveloperApi ::
+ */
+@DeveloperApi
+case class LeftSemiJoinBFB(
+ leftKeys: Seq[Expression],
--- End diff --
4 space indent
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