From 09a38b10a9e282a508b375f7856ce5b5257a2df5 Mon Sep 17 00:00:00 2001
From: Hannah Bast <bast@cs.uni-freiburg.de>
Date: Thu, 15 Jan 2026 22:03:35 +0100
Subject: [PATCH] Add runtime parameter `disable-update-graph-metadata`

The parameter does what it says, and is `false` by default
---
 src/global/RuntimeParameters.cpp | 1 +
 src/global/RuntimeParameters.h   | 4 ++++
 src/index/LocatedTriples.cpp     | 6 ++++++
 3 files changed, 11 insertions(+)

diff --git a/src/global/RuntimeParameters.cpp b/src/global/RuntimeParameters.cpp
index 5a409a2c32..b23b79a4c4 100644
--- a/src/global/RuntimeParameters.cpp
+++ b/src/global/RuntimeParameters.cpp
@@ -51,6 +51,7 @@ RuntimeParameters::RuntimeParameters() {
   add(materializedViewWriterMemory_);
   add(defaultQueryTimeout_);
   add(sortInMemoryThreshold_);
+  add(disableUpdateGraphMetadata_);
 
   defaultQueryTimeout_.setParameterConstraint(
       [](std::chrono::seconds value, std::string_view parameterName) {
diff --git a/src/global/RuntimeParameters.h b/src/global/RuntimeParameters.h
index 67cdfbf3f8..24901addfe 100644
--- a/src/global/RuntimeParameters.h
+++ b/src/global/RuntimeParameters.h
@@ -135,6 +135,10 @@ struct RuntimeParameters {
   MemorySizeParameter sortInMemoryThreshold_{
       ad_utility::MemorySize::gigabytes(5), "sort-in-memory-threshold"};
 
+  // If set to `true`, skip updating graph metadata for delta triples.
+  // This can improve performance when graph metadata is not needed.
+  Bool disableUpdateGraphMetadata_{false, "disable-update-graph-metadata"};
+
   // ___________________________________________________________________________
   // IMPORTANT NOTE: IF YOU ADD PARAMETERS ABOVE, ALSO REGISTER THEM IN THE
   // CONSTRUCTOR, S.T. THEY CAN ALSO BE ACCESSED VIA THE RUNTIME INTERFACE.
diff --git a/src/index/LocatedTriples.cpp b/src/index/LocatedTriples.cpp
index 4666d856ff..4d61f5f903 100644
--- a/src/index/LocatedTriples.cpp
+++ b/src/index/LocatedTriples.cpp
@@ -11,6 +11,7 @@
 #include "index/LocatedTriples.h"
 
 #include "backports/algorithm.h"
+#include "global/RuntimeParameters.h"
 #include "index/CompressedRelation.h"
 #include "index/ConstantsIndexBuilding.h"
 #include "util/ChunkedForLoop.h"
@@ -276,6 +277,11 @@ void LocatedTriplesPerBlock::setOriginalMetadata(
 // the graph info is set to `nullopt`, which means that there is no info.
 static auto updateGraphMetadata(CompressedBlockMetadata& blockMetadata,
                                 const LocatedTriples& locatedTriples) {
+  // Early return if graph metadata updates are disabled.
+  if (getRuntimeParameter<&RuntimeParameters::disableUpdateGraphMetadata_>()) {
+    return;
+  }
+
   // We do not know anything about the triples contained in the block, so we
   // also cannot know if the `locatedTriples` introduces duplicates. We thus
   // have to be conservative and assume that there are duplicates.