AMashenkov commented on code in PR #7589:
URL: https://github.com/apache/ignite-3/pull/7589#discussion_r2871959938
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modules/sql-engine/src/main/java/org/apache/ignite/internal/sql/engine/prepare/QueryPlanChain.java:
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@@ -0,0 +1,235 @@
+package org.apache.ignite.internal.sql.engine.prepare;
+
+import it.unimi.dsi.fastutil.ints.IntSet;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.function.Supplier;
+import javax.annotation.Nullable;
+import org.apache.ignite.internal.util.Pair;
+
+/**
+ * Represents a collection of non-overlapping intervals [from, till).
+ */
+public class QueryPlanChain<T> {
+ // Guarded by synchronized,
+ private final TreeMap<Integer, VersionItem<T>> map = new TreeMap<>();
Review Comment:
Why don't use `Int2ObjectRBTreeMap`?
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