adamkennedy commented on code in PR #3757:
URL: https://github.com/apache/calcite/pull/3757#discussion_r1565184064
##########
core/src/main/java/org/apache/calcite/tools/RelBuilder.java:
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@@ -2502,9 +2502,10 @@ private RelBuilder
pruneAggregateInputFieldsAndDeduplicateAggCalls(
newProjects.add(project.getProjects().get(i));
builder.add(project.getRowType().getFieldList().get(i));
}
+
r =
- project.copy(cluster.traitSet(), project.getInput(), newProjects,
- builder.build());
+ project.copy(project.getTraitSet().apply(targetMapping),
project.getInput(),
Review Comment:
If that's not the right one, it would result in corrupting the Collation of
the underlying Project
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