DonnyZone commented on a change in pull request #1756: [CALCITE-1824] GROUP_ID
returns wrong result
URL: https://github.com/apache/calcite/pull/1756#discussion_r366246964
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File path:
core/src/main/java/org/apache/calcite/sql/validate/AggregatingSelectScope.java
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@@ -110,8 +111,11 @@ private Resolved resolve() {
final Set<ImmutableBitSet> flatGroupSets =
Sets.newTreeSet(ImmutableBitSet.COMPARATOR);
+ final Map<ImmutableBitSet, Integer> groupSetCount = new HashMap<>();
for (List<ImmutableBitSet> groupSet : Linq4j.product(builder.build())) {
- flatGroupSets.add(ImmutableBitSet.union(groupSet));
+ final ImmutableBitSet set = ImmutableBitSet.union(groupSet);
+ groupSetCount.put(set, groupSetCount.getOrDefault(set, 0) + 1);
+ flatGroupSets.add(set);
Review comment:
I agree. We can unify HashMap and the sorted Set as TreeMap.
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