Batak Programming Language

Design Perspective

Programming language • • Extreme opinions – – Blind fanatism DON’T CARE (they are just the same) Proportional ones – Language is very important • Communication is of utmost important • Language is a means of communication (bad language => bad communication) – – No single language suits every needs A set of languages can suit every needs

7 language [style] s to fill every needs ?

• • • • • • • General purpose programming-language Database-oriented programming-language Shell programming-language Application-level scripting language (XML?) Assembly (style) programming-language Metalanguage (used in YACC) Binary-style (intermediate, machine)

May not be the category of language • • • • • String processing (Perl, AWK) Internal language of document (PDF; internal format of Excel, Word documents) PCL (Printing Command Language) Logic programming-language Functional programming-language

Integration with relational database (1) • Oracle SQL (real world) CREATE TYPE student AS OBJECT ( id NUMERIC(8), name VARCHAR(30) ); CREATE TABLE IT_students OF student; CREATE TABLE mech_students OF student;

Integration with relational database (2) • Some SQL (?) CREATE TYPE student := { numeric<9> id; char[20] name; }; CREATE TABLE IT_students, mech_students ( PRIMARY KEY {id} );

Integration with relational database (3) • In Batak Program P; Type student := { numeric<9> id; char[20] name; }; Table IT_students, mech_students ( PRIMARY KEY {id} ); integer main() { INSERT mech_students INTO IT_students; /* not INSERT INTO IT_students SELECT ... */ }