ygerzhedovich commented on a change in pull request #498:
URL: https://github.com/apache/ignite-3/pull/498#discussion_r769754226



##########
File path: 
modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/rule/FilterSpoolMergeToSortedIndexSpoolRule.java
##########
@@ -78,7 +77,7 @@ public void onMatch(RelOptRuleCall call) {
             return;
         }
 
-        RelCollation collation = 
TraitUtils.createCollation(List.copyOf(idxCond.keys()));
+        RelCollation collation = TraitUtils.createCollation(idxCond.keys());

Review comment:
       why you remove copyOf? I'm not sure that we can pass the same 
collections here.




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