another ugly basic implementation

main.cpp

@@ -16,7 +16,8 @@ int main(int argc, char *argv[]) {
             "insert into a (i, s) values(1, 'one')",
             "insert into a (i, s) values(2, 'two')",
             "insert into a (i, s) values(3, 'two')",
-            "select i, s from a where i > 0"
+            "insert into a (i, s) values(4, 'four')",
+            "select i, s from a where i > 2"
 //            "update a set s = 'three' where i = 3"
 //            "delete from a where i = 3"
 //            "select i, s from a where i > 0"
@@ -25,7 +26,7 @@ int main(int argc, char *argv[]) {
 
     for(auto command : sql_commands) {
         auto node = parser.parse(command);
-        executor.execute(*node.get());
+        executor.execute(*node);
     }
 
 	return 0;