wuwenw commented on a change in pull request #6991:
URL: https://github.com/apache/incubator-pinot/pull/6991#discussion_r641166342
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File path:
pinot-core/src/main/java/org/apache/pinot/core/query/aggregation/groupby/DefaultGroupByExecutor.java
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@@ -144,4 +147,22 @@ protected void aggregate(TransformBlock transformBlock,
int length, int function
public AggregationGroupByResult getResult() {
return new AggregationGroupByResult(_groupKeyGenerator,
_aggregationFunctions, _groupByResultHolders);
}
+
+ @Override
+ public Collection<TableResizer.fullIntermediateResult> trimGroupByResult(int
threshold, TableResizer tableResizer) {
+ // Check if a trim is necessary
+ int keyNum = 0;
+ if (_hasMVGroupByExpression) {
+ keyNum = _mvGroupKeys.length;
+ } else {
+ keyNum = _svGroupKeys.length;
+ }
+ Iterator<GroupKeyGenerator.GroupKey> groupKeyIterator =
_groupKeyGenerator.getGroupKeys();
+ if (keyNum > threshold && threshold != -1) {
+ return tableResizer.trimInSegmentResults(groupKeyIterator,
_groupByResultHolders, threshold);
Review comment:
Now the threshold is calculated in the instance plan maker
> threshold should be calculated based on the `limit` instead of hardcoded
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