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apache · Jul 21, 2015 · 0f4380d · 0f4380d
1 parent 69e38f5
commit 0f4380d
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
@@ -154,6 +154,8 @@ private[joins] object HashedRelation {
  * A HashedRelation for UnsafeRow, which is backed by BytesToBytesMap that maps the key into a
  * sequence of values.
  *
+ * It's safe to to use inside a broadcast, and safe to read by multiple threads.
+ *
  * TODO(davies): use BytesToBytesMap
  */
 private[joins] final class UnsafeHashedRelation(