diff --git a/src/main/java/it/inaf/oats/vospace/persistence/NodeDAO.java b/src/main/java/it/inaf/oats/vospace/persistence/NodeDAO.java
index 730a9bd418e802b55b01e5be04b7cad10257c4fb..11d8ad5b2fdb7bdd8c8c873f94d3e38c4fbdcc00 100644
--- a/src/main/java/it/inaf/oats/vospace/persistence/NodeDAO.java
+++ b/src/main/java/it/inaf/oats/vospace/persistence/NodeDAO.java
@@ -41,21 +41,24 @@ public class NodeDAO {
         String path = nodeURI.replaceAll("vos://[^/]+", "");
         String parentPath = getParentPath(path);
 
-        String sql = "SELECT path, relative_path from "
+        String sql = "SELECT path from "
                 + "node n join node_vos_path p on n.node_id = p.node_id "
                 + "where p.vos_path = ?";
 
-        List<NodePaths> paths = jdbcTemplate.query(conn -> {
+        List<String> ltreeParentPaths = jdbcTemplate.query(conn -> {
             PreparedStatement ps = conn.prepareStatement(sql);
             ps.setString(1, parentPath);
             return ps;
         }, (row, index) -> {
-            return getPathsFromResultSet(row);
+            return row.getString("path");
         });
 
-        if (paths.isEmpty()) {
+        if (ltreeParentPaths.isEmpty()) {
             throw new IllegalStateException("Unable to find parent node during node creation");
         }
+        if (ltreeParentPaths.size() > 1) {
+            throw new IllegalStateException("Multiple ltree parent paths found for " + parentPath);
+        }
 
         StringBuilder sb = new StringBuilder();
         sb.append("INSERT INTO node");
@@ -72,7 +75,7 @@ public class NodeDAO {
             ps.setArray(5, fromPropertyToArray(ps, getProperty(myNode, getPropertyURI("groupread"))));
             ps.setArray(6, fromPropertyToArray(ps, getProperty(myNode, getPropertyURI("groupwrite"))));
             ps.setBoolean(7, Boolean.valueOf(getProperty(myNode, getPropertyURI("publicread"))));
-            ps.setObject(8, paths.get(0).parentPath, Types.OTHER);
+            ps.setObject(8, ltreeParentPaths.get(0), Types.OTHER);
             ps.setObject(9, getDbNodeType(myNode), Types.OTHER);
             return ps;
         });
@@ -81,7 +84,7 @@ public class NodeDAO {
 
     public Optional<Node> listNode(String path) {
 
-        String sql = "SELECT os.vos_path, n.node_id, type, async_trans, busy_state, owner_id, group_read, group_write, is_public, content_length, created_on, last_modified from node n\n"
+        String sql = "SELECT os.vos_path, n.node_id, type, async_trans, busy_state, creator_id, group_read, group_write, is_public, content_length, created_on, last_modified from node n\n"
                 + "JOIN node_vos_path os ON n.node_id = os.node_id\n"
                 + "WHERE n.path ~ (" + getFirstLevelChildrenSelector(path) + ")::lquery\n"
                 + "OR os.vos_path = ? ORDER BY vos_path";
@@ -141,6 +144,9 @@ public class NodeDAO {
         addProperty(getPropertyURI("btime"), rs.getString("created_on"),
                 properties);
 
+        addProperty(getPropertyURI("creator"), rs.getString("creator_id"),
+                properties);
+
         addProperty(getPropertyURI("mtime"), rs.getString("last_modified"),
                 properties);
 
@@ -228,13 +234,22 @@ public class NodeDAO {
         return false;
     }
 
+    // Copied from CreateNodeController: to be moved in a common utility class
     private String getParentPath(String path) {
-        String[] parsedPath = path.split("/");
+        String[] parsedPath = path.split("[/]+");
+
+        if (parsedPath.length < 2 || !parsedPath[0].isEmpty()) {
+            throw new IllegalArgumentException();
+        }
 
         StringBuilder sb = new StringBuilder();
+        sb.append("/");
 
-        for (int i = 0; i < parsedPath.length - 1; i++) {
-            sb.append("/").append(parsedPath[i]);
+        for (int i = 1; i < parsedPath.length - 1; i++) {
+            sb.append(parsedPath[i]);
+            if (i < parsedPath.length - 2) {
+                sb.append("/");
+            }
         }
 
         return sb.toString();