HeartSaVioR commented on a change in pull request #26108: [SPARK-26154][SS]
Streaming left/right outer join should not return outer nulls for already
matched rows
URL: https://github.com/apache/spark/pull/26108#discussion_r341432221
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/SymmetricHashJoinStateManager.scala
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@@ -187,17 +217,17 @@ class SymmetricHashJoinStateManager(
// Find the next value satisfying the condition, updating `currentKey`
and `numValues` if
// needed. Returns null when no value can be found.
- private def findNextValueForIndex(): UnsafeRow = {
+ private def findNextValueForIndex(): (UnsafeRow, Boolean) = {
// Loop across all values for the current key, and then all other
keys, until we find a
// value satisfying the removal condition.
def hasMoreValuesForCurrentKey = currentKey != null && index <
numValues
def hasMoreKeys = allKeyToNumValues.hasNext
while (hasMoreValuesForCurrentKey || hasMoreKeys) {
if (hasMoreValuesForCurrentKey) {
// First search the values for the current key.
- val currentValue = keyWithIndexToValue.get(currentKey, index)
+ val (currentValue, matched) =
keyWithIndexToValue.getWithMatched(currentKey, index)
Review comment:
I'd wait for hearing voice on out parameter, as it complicates the logic
(all methods in call hierarchy should support out parameter to achieve object
reuse). I've changed tuple to case class to deal with null issue.
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