Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/12102#discussion_r58305579
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/HashedRelation.scala
---
@@ -523,44 +497,32 @@ private[joins] object LongHashedRelation {
}
}
- if (keyIsUnique) {
- if (hashTable.size() > (maxKey - minKey) * DENSE_FACTOR) {
- // The keys are dense enough, so use LongArrayRelation
- val length = (maxKey - minKey).toInt + 1
- val sizes = new Array[Int](length)
- val offsets = new Array[Int](length)
- var offset = 0
- var i = 0
- while (i < length) {
- val rows = hashTable.get(i + minKey)
- if (rows != null) {
- offsets(i) = offset
- sizes(i) = rows(0).getSizeInBytes
- offset += sizes(i)
- }
- i += 1
- }
- val bytes = new Array[Byte](offset)
- i = 0
- while (i < length) {
- val rows = hashTable.get(i + minKey)
- if (rows != null) {
- rows(0).writeToMemory(bytes, Platform.BYTE_ARRAY_OFFSET +
offsets(i))
- }
- i += 1
+ if (keyIsUnique && hashTable.size() > (maxKey - minKey) *
DENSE_FACTOR) {
+ // The keys are dense enough, so use LongArrayRelation
+ val length = (maxKey - minKey).toInt + 1
--- End diff --
ok when you remove this, can you make sure we put the logic of constructing
a LongBytesMap in LongBytesMap itself, and not a generic factory?
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