--- a/artifact-database/src/main/resources/sql/org-postgresql-driver.properties	Mon Feb 22 17:25:21 2016 +0100
+++ b/artifact-database/src/main/resources/sql/org-postgresql-driver.properties	Fri Feb 09 13:26:19 2018 +0100
@@ -185,3 +185,10 @@
                 INNER JOIN collection_items ci ON c.id = ci.collection_id \
                 INNER JOIN artifacts a         ON a.id = ci.artifact_id \
         ORDER BY u_gid, c_gid
+
+find.user.by.artifact = \
+	SELECT users.id, users.name FROM users, collections, collection_items, artifacts \
+	WHERE users.id = collections.owner_id AND \
+		  collections.id = collection_items.collection_id AND \
+		  collection_items.artifact_id = artifacts.id AND \
+		  artifacts.gid = ?::uuid