clintropolis commented on code in PR #15232:
URL: https://github.com/apache/druid/pull/15232#discussion_r1369335570
##########
processing/src/main/java/org/apache/druid/query/groupby/GroupingEngine.java:
##########
@@ -788,11 +788,11 @@ private static boolean
summaryRowPreconditions(GroupByQuery query)
private static Iterator<ResultRow> summaryRowIterator(GroupByQuery q)
{
List<AggregatorFactory> aggSpec = q.getAggregatorSpecs();
- Object[] values = new Object[aggSpec.size()];
+ ResultRow resultRow =
ResultRow.create(q.getResultRowSizeWithPostAggregators());
for (int i = 0; i < aggSpec.size(); i++) {
- values[i] = aggSpec.get(i).factorize(new
AllNullColumnSelectorFactory()).get();
+ resultRow.set(i, aggSpec.get(i).factorize(new
AllNullColumnSelectorFactory()).get());
}
Review Comment:
oh, I think you need to actually compute the postaggs... which is why the
test is failing, see `mergeResults` for an example, something like
```
private static Iterator<ResultRow> summaryRowIterator(GroupByQuery q)
{
List<AggregatorFactory> aggSpec = q.getAggregatorSpecs();
ResultRow resultRow =
ResultRow.create(q.getResultRowSizeWithPostAggregators());
for (int i = 0; i < aggSpec.size(); i++) {
resultRow.set(i, aggSpec.get(i).factorize(new
AllNullColumnSelectorFactory()).get());
}
Map<String, Object> map = resultRow.toMap(q);
for (int i = 0; i < q.getPostAggregatorSpecs().size(); i++) {
final PostAggregator postAggregator =
q.getPostAggregatorSpecs().get(i);
final Object value = postAggregator.compute(map);
resultRow.set(q.getResultRowPostAggregatorStart() + i, value);
map.put(postAggregator.getName(), value);
}
return Collections.singleton(resultRow).iterator();
}
```
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