update.js

    function openConnection() {
        try {
            var db = LocalStorage.openDatabaseSync('harbour-sudoku', '2.0', 'Saved Game Data for Sudoku', 2000);
        } catch(e) {
            var code = e.code;

            if(code !== SQLException.VERSION_ERR) {
                throw e;
            }   

            // XXX we'll need something better for moving between different versions...
            db = LocalStorage.openDatabaseSync('harbour-sudoku', '1.0', 'Saved Game Data for Sudoku', 2000);
            db.readTransaction(function(txn) {
                var result = txn.executeSql('SELECT * FROM sqlite_master');

                console.log(result.rows.length);
            }); 
            db.changeVersion('1.0', '2.0', function(txn) {
                txn.executeSql('ALTER TABLE board ADD COLUMN is_initial INTEGER NOT NULL DEFAULT 0');
            }); 
        }   

        return db; 
    }