diff --git a/db_bridge/mysql_db.cpp b/db_bridge/mysql_db.cpp
--- a/db_bridge/mysql_db.cpp
+++ b/db_bridge/mysql_db.cpp
@@ -37,7 +37,7 @@
     Abstract_DB::DB_ROW vec;
     Abstract_DB::DB_RESULT rows;
     MYSQL_ROW row;
-    int i;
+    int i = 0;
 
     /*
      * send SQL query
@@ -61,6 +61,8 @@
         vec.clear ();
     }
 
+    std::cerr << "Die Abfrage hat " << i << " Spalte(n) und " << rows.size () << " Reihe(n)." << std::endl;
+
     if (res != NULL) {
         mysql_free_result (res);
     }