From 3dd493182769abea8aee919503c45adbf3225d57 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ha=CC=8Avard=20Ottestad?= <hmottestad@gmail.com>
Date: Thu, 9 May 2024 13:11:16 +0200
Subject: [PATCH] GH-2998 possible improvement to the Changeset

---
 .../org/eclipse/rdf4j/sail/base/Changeset.java    | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/core/sail/base/src/main/java/org/eclipse/rdf4j/sail/base/Changeset.java b/core/sail/base/src/main/java/org/eclipse/rdf4j/sail/base/Changeset.java
index fd8b3a54b68..a634c35faee 100644
--- a/core/sail/base/src/main/java/org/eclipse/rdf4j/sail/base/Changeset.java
+++ b/core/sail/base/src/main/java/org/eclipse/rdf4j/sail/base/Changeset.java
@@ -806,6 +806,21 @@ Iterable<Triple> getApprovedTriples(Resource subj, IRI pred, Value obj) {
 
 	void removeApproved(Statement next) {
 		assert !closed;
+
+		Model localApproved = approved;
+		if (localApproved != null && !localApproved.contains(next)) {
+			boolean readLock = readWriteLock.readLock();
+			try {
+				if (approved != null && !approvedEmpty) {
+					if (!approved.contains(next)) {
+						return;
+					}
+				}
+			} finally {
+				readWriteLock.unlockReader(readLock);
+			}
+		}
+
 		long writeLock = readWriteLock.writeLock();
 		try {
 			if (approved != null) {