Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/1127#discussion_r14051069
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins.scala ---
@@ -245,6 +245,73 @@ case class LeftSemiJoinBNL(
}
}
+
+
+
+
+/**
+ * :: DeveloperApi ::
+ * 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
+case class LeftSemiJoinBFB(
+ leftKeys: Seq[Expression],
--- End diff --
Indent 4 spaces. Also I'd go with the full more descriptive name instead
of BFB since we are only going to have to type it out in like 2 places.
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