tkalkirill commented on code in PR #5276:
URL: https://github.com/apache/ignite-3/pull/5276#discussion_r1981207146


##########
modules/catalog/src/main/java/org/apache/ignite/internal/catalog/Catalog.java:
##########
@@ -327,4 +339,24 @@ private static Int2ObjectMap<List<CatalogIndexDescriptor>> 
toIndexesByTableId(Co
 
         return indexesByTableId;
     }
+
+    private static Int2ObjectMap<List<CatalogTableDescriptor>> 
toTablesByZoneId(Collection<CatalogSchemaDescriptor> schemas) {
+        Int2ObjectMap<List<CatalogTableDescriptor>> tablesByZoneId = new 
Int2ObjectOpenHashMap<>();
+
+        for (CatalogSchemaDescriptor schema : schemas) {
+            for (CatalogTableDescriptor table : schema.tables()) {
+                tablesByZoneId.computeIfAbsent(table.zoneId(), tables -> new 
ArrayList<>()).add(table);
+            }
+        }
+
+        for (List<CatalogTableDescriptor> tables : tablesByZoneId.values()) {
+            tables.sort(comparingInt(CatalogTableDescriptor::id));
+        }
+
+        for (Entry<List<CatalogTableDescriptor>> entry : 
tablesByZoneId.int2ObjectEntrySet()) {
+            entry.setValue(unmodifiableList(entry.getValue()));

Review Comment:
   unmodifiableList(entry.getValue()) -> List.copyOf(entry.getValue())



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