michaeljmarshall commented on code in PR #4196:
URL: https://github.com/apache/cassandra/pull/4196#discussion_r2138642065
##########
src/java/org/apache/cassandra/index/sai/plan/QueryController.java:
##########
@@ -395,15 +407,15 @@ private KeyRangeIterator getTopKRows(List<PrimaryKey>
rawSourceKeys, RowFilter.E
/**
* Create row id iterator from different indexes' on-disk searcher of the
same sstable
*/
- private KeyRangeIterator createRowIdIterator(Pair<Expression,
Collection<SSTableIndex>> indexExpression)
+ private KeyRangeIterator
createRowIdIterator(QueryViewBuilder.QueryExpressionView indexExpression)
{
- List<KeyRangeIterator> subIterators = indexExpression.right
+ List<KeyRangeIterator> subIterators = indexExpression.sstableIndexes
.stream()
.map(index ->
{
try
{
- List<KeyRangeIterator> iterators =
index.search(indexExpression.left, mergeRange, queryContext);
+ List<KeyRangeIterator> iterators =
index.search(indexExpression.expression, mergeRange, queryContext);
// concat the result from multiple
segments for the same index
return
KeyRangeConcatIterator.builder(iterators.size()).add(iterators).build();
Review Comment:
Note for reviewers: we could technically remove this `createRowIdIterator`
and collapse the logic in the calling method to use a
`IndexSearchResultIterator` now. I didn't do that here though because this
logic uses `KeyRangeConcatIterator` to more efficiently join sstable index
segments. Since that is an optimization, I didn't want to update the logic in
`IndexSearchResultIterator` on this bug fix. (I'd propose that the real fix is
to update `SSTableIndex#search`'s return type from `List<KeyRangeIterator>` to
`KeyRangeIterator` and then the implementation can use the
`KeyRangeConcatIterator`.)
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