zstan commented on a change in pull request #8380:
URL: https://github.com/apache/ignite/pull/8380#discussion_r510790611
##########
File path:
modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/exec/rel/Inbox.java
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@@ -216,7 +216,7 @@ private void push() throws IgniteCheckedException {
/** */
private void pushOrdered() throws IgniteCheckedException {
PriorityQueue<Pair<Row, Buffer>> heap =
- new PriorityQueue<>(buffers.size(),
Map.Entry.comparingByKey(comp));
+ new PriorityQueue<>(Math.max(buffers.size(), 1),
Map.Entry.comparingByKey(comp));
Review comment:
i understand why you refactor here: Math.max, but why do we need
additional allocation here ?
if (buffers.isEmpty)
PriorityQueue<Pair<Row, Buffer>> heap = null; and further F.isEmpty(heap)
check would be match clear, isn`t it ?
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