moved code around

Author: hmottestad

core/queryalgebra/evaluation/src/main/java/org/eclipse/rdf4j/query/algebra/evaluation/sketch/JoinCostVector.java

@@ -13,6 +13,9 @@
 
 import java.util.Objects;
 
+import org.eclipse.rdf4j.common.annotation.Experimental;
+
+@Experimental
 final class JoinCostVector implements Comparable<JoinCostVector> {
 
 	private final double totalWorkRows;

core/queryalgebra/evaluation/src/main/java/org/eclipse/rdf4j/query/algebra/evaluation/sketch/JoinPlanningState.java

@@ -12,6 +12,9 @@
 
 package org.eclipse.rdf4j.query.algebra.evaluation.sketch;
 
+import org.eclipse.rdf4j.common.annotation.Experimental;
+
+@Experimental
 final class JoinPlanningState {
 
 	private static final int ORDER_SLOT_BITS = 6;

core/queryalgebra/evaluation/src/main/java/org/eclipse/rdf4j/query/algebra/evaluation/sketch/ParetoFrontier.java

@@ -17,6 +17,9 @@
 import java.util.Objects;
 import java.util.function.BiConsumer;
 
+import org.eclipse.rdf4j.common.annotation.Experimental;
+
+@Experimental
 final class ParetoFrontier<T> {
 
 	private final int limit;

core/queryalgebra/evaluation/src/main/java/org/eclipse/rdf4j/query/algebra/evaluation/sketch/SketchStatementSourceException.java

@@ -12,11 +12,17 @@
 
 package org.eclipse.rdf4j.query.algebra.evaluation.sketch;
 
+import java.io.Serial;
+
+import org.eclipse.rdf4j.common.annotation.Experimental;
+
 /**
  * Runtime failure while reading statements for sketch estimation.
  */
+@Experimental
 public class SketchStatementSourceException extends RuntimeException {
 
+	@Serial
 	private static final long serialVersionUID = -4992850717269141299L;
 
 	public SketchStatementSourceException(Throwable cause) {

core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/LmdbStore.java

@@ -55,8 +55,8 @@
 /**
  * A SAIL implementation using LMDB for storing and querying its data.
  *
- * @implNote the LMDB store is is in an experimental state: its existence, signature or behavior may change without
- *           warning from one release to the next.
+ * @implNote the LMDB store is in an experimental state: its existence, signature or behavior may change without warning
+ *           from one release to the next.
  */
 @Experimental
 public class LmdbStore extends AbstractNotifyingSail implements FederatedServiceResolverClient {

core/sail/lmdb/src/main/java/org/eclipse/rdf4j/sail/lmdb/estimate/package-info.java

@@ -0,0 +1,14 @@
+/*******************************************************************************
+ * Copyright (c) 2026 Eclipse RDF4J contributors.
+ *
+ * All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse
+ * Distribution License v1.0 which accompanies this distribution, and is available at
+ * http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *******************************************************************************/
+
+@InternalUseOnly
+package org.eclipse.rdf4j.sail.lmdb.estimate;
+
+import org.eclipse.rdf4j.common.annotation.InternalUseOnly;