Github user rxin commented on a diff in the pull request: https://github.com/apache/spark/pull/7592#discussion_r35399934 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala --- @@ -149,31 +158,141 @@ private[joins] object HashedRelation { } } +/** + * An extended CompactBuffer that could grow and update. + */ +private[joins] class MutableCompactBuffer[T: ClassTag] extends CompactBuffer[T] { + override def growToSize(newSize: Int): Unit = super.growToSize(newSize) + override def update(i: Int, v: T): Unit = super.update(i, v) +} /** * A HashedRelation for UnsafeRow, which is backed by BytesToBytesMap that maps the key into a * sequence of values. - * - * TODO(davies): use BytesToBytesMap */ private[joins] final class UnsafeHashedRelation( --- End diff -- you need to update the scaladoc to document the encoding here
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