From 91fbe071b1a252051a4d2eb4239e99ec9d5f99c2 Mon Sep 17 00:00:00 2001
From: realHannes <realhannes@outlook.com>
Date: Fri, 14 Jun 2024 01:21:16 +0200
Subject: [PATCH] fix

---
 src/engine/sparqlExpressions/SparqlExpressionValueGetters.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/engine/sparqlExpressions/SparqlExpressionValueGetters.cpp b/src/engine/sparqlExpressions/SparqlExpressionValueGetters.cpp
index 42fef1836f..eda7c75438 100644
--- a/src/engine/sparqlExpressions/SparqlExpressionValueGetters.cpp
+++ b/src/engine/sparqlExpressions/SparqlExpressionValueGetters.cpp
@@ -216,7 +216,7 @@ OptIri makeDatatypeValueGetter::operator()(
     case Datatype::VocabIndex: {
       const auto& idx = context->_qec.getIndex();
       entity = idx.idToOptionalString(id.getVocabIndex());
-      if (entity.has_value()) {
+      if (!entity.has_value()) {
         return std::nullopt;
       }
       return iriFromLiteral(entity.value());