Sorry, but neither PL/SQL nor SQLScript (nor any other procedural add-on DB-language) follows the ANSI standard - since there is no ANSI SQL standard for procedural language extensions.
If there were one, it's pretty likely that most DBMS vendors would have just adopted it, like they did with SQL.
The question of porting PL/SQL code to SAP HANA has been discussed over and over here on SCN, so I recommend to read up on what's already here.
Bottom line still is: you will need to manually port your solution.
- Lars