somandal commented on code in PR #11200:
URL: https://github.com/apache/pinot/pull/11200#discussion_r1278059576
##########
pinot-core/src/main/java/org/apache/pinot/core/operator/docidsets/AndDocIdSet.java:
##########
@@ -75,13 +77,21 @@ public BlockDocIdIterator iterator() {
List<BitmapBasedDocIdIterator> bitmapBasedDocIdIterators = new
ArrayList<>();
List<ScanBasedDocIdIterator> scanBasedDocIdIterators = new ArrayList<>();
List<BlockDocIdIterator> remainingDocIdIterators = new ArrayList<>();
- for (int i = 0; i < numDocIdSets; i++) {
- BlockDocIdIterator docIdIterator = _docIdSets.get(i).iterator();
+
+ Iterator<BlockDocIdSet> iterator = _docIdSets.iterator();
+ for (int i = 0; iterator.hasNext(); i++) {
+ BlockDocIdSet blockDocIdSet = iterator.next();
+ BlockDocIdIterator docIdIterator = blockDocIdSet.iterator();
allDocIdIterators[i] = docIdIterator;
if (docIdIterator instanceof SortedDocIdIterator) {
sortedDocIdIterators.add((SortedDocIdIterator) docIdIterator);
+ // do not keep holding on to the _docIdRanges since they will occupy
heap space during the query execution
+ iterator.remove();
} else if (docIdIterator instanceof BitmapBasedDocIdIterator) {
bitmapBasedDocIdIterators.add((BitmapBasedDocIdIterator)
docIdIterator);
+ // do not keep holding on to the bitmaps since they will occupy heap
space during the query execution
+ _numEntriesScannedInFilter +=
blockDocIdSet.getNumEntriesScannedInFilter();
Review Comment:
it is quite confusing when you update the `getNumEntriesScannedInFilter`
here but not for the `SortedDocIdIterator` case where also you remove the
iterator. From the code (please double check) it looks like the
`SortedDocIdSet` returns 0:
```
@Override
public long getNumEntriesScannedInFilter() {
return 0L;
}
```
Can we also call this API for that case to ensure that if ever the
implementation changes in the future this doesn't result in a bug here since we
don't update for all cases where we remove?
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