richardstartin commented on a change in pull request #7935:
URL: https://github.com/apache/pinot/pull/7935#discussion_r772659060
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File path:
pinot-core/src/main/java/org/apache/pinot/core/query/aggregation/groupby/DictionaryBasedGroupKeyGenerator.java
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@@ -270,6 +270,9 @@ private void processSingleValue(int numDocs, int[] dictIds,
int[] outGroupIds) {
if (!_flags[outGroupIds[i]]) {
_numKeys++;
_flags[outGroupIds[i]] = true;
+ if (_numKeys == _globalGroupIdUpperBound) {
Review comment:
This loop will only exit early when the cardinality is low.
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