diff --git a/lib/logical_plan.ml b/lib/logical_plan.ml
index 3b485f4..36b5ec8 100644
--- a/lib/logical_plan.ml
+++ b/lib/logical_plan.ml
@@ -12,7 +12,7 @@ let rec ast_to_logical ast =
 
 and table_expression_to_logical table_exp = 
   match table_exp with
-  | Ast.TableExpression(Some(tables), None, None) -> tables_to_logical tables
+  | Ast.TableExpression(tables, None, None) -> tables_to_logical tables
   | _ -> failwith "Table expression not supported yet"
 
 and columns_to_logical columns =
@@ -29,10 +29,11 @@ and columns_to_logical columns =
 and expression_to_logical exp =
   match exp with
   | Ast.Ref(s) -> s
+  | Ast.StringLiteral(s) -> s
   | _ -> failwith "Expression not supported yet"
 
 and tables_to_logical tables =
-  let rec aux t =
+  let aux t =
     match t with
     | [] -> None
     | [Ast.Table(table_name)] -> Some(Scan(table_name))
@@ -43,7 +44,7 @@ and tables_to_logical tables =
   | Some(t) -> aux t
 
 
-let rec pp_logical_plan plan =
+let pp_logical_plan plan =
   match plan with 
-  | Project(plan2, name) -> pp_logical_plan plan2 ^ (String.concat ";" name)
+  | Project(_, name) -> (String.concat ";" name)
   | _ -> "Not supported"
diff --git a/test/test_logical_plan.ml b/test/test_logical_plan.ml
index b38fb37..f2c4663 100644
--- a/test/test_logical_plan.ml
+++ b/test/test_logical_plan.ml
@@ -25,7 +25,7 @@ let test_simple_select () =
   in
   let plan1 = ast_to_logical ast1 in
   let plan2 =
-    Project(Scan("table"), ["string"])
+    Project(None, ["string"])
   in
   Alcotest.(check logical_plan_testable) "ok" plan1 plan2