Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7849#discussion_r36036208
--- Diff:
sql/core/src/main/java/org/apache/spark/sql/execution/UnsafeFixedWidthAggregationMap.java
---
@@ -225,4 +232,93 @@ public void printPerfMetrics() {
System.out.println("Total memory consumption (bytes): " +
map.getTotalMemoryConsumption());
}
+ /**
+ * Sorts the key, value data in this map in place, and return them as an
iterator.
+ *
+ * The only memory that is allocated is the address/prefix array, 16
bytes per record.
+ */
+ public KVIterator<UnsafeRow, UnsafeRow> sortedIterator() {
+ int numElements = map.numElements();
+ final int numKeyFields = groupingKeySchema.size();
+ TaskMemoryManager memoryManager = map.getTaskMemoryManager();
--- End diff --
can you name this `taskMemoryManager` to disambiguate from
`ShuffleMemoryManager`?
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