diff --git a/src/main/java/it/cavallium/dbengine/client/SearchResultKeys.java b/src/main/java/it/cavallium/dbengine/client/SearchResultKeys.java
index c456584..254c313 100644
--- a/src/main/java/it/cavallium/dbengine/client/SearchResultKeys.java
+++ b/src/main/java/it/cavallium/dbengine/client/SearchResultKeys.java
@@ -40,6 +40,10 @@ public class SearchResultKeys<T> {
 		);
 	}
 
+	public Flux<SearchResultKey<T>> onlyKeys() {
+		return this.results.filter(LuceneSignal::isValue).map(LuceneSignal::getValue);
+	}
+
 	/**
 	 * You must subscribe to both publishers
 	 */