Android : Upgrading user database using SQLiteAssetHelper -

i cant seem understand how upgrade database after reading docs @ https://github.com/jgilfelt/android-sqlite-asset-helper

i want keep users data in 1 table only. don't need alter tables. upgrade pretty adding new rows in table.

so flow (i'm guessing) :

onupgrade :
1) arraylist of user defined data table 1
2) update database
3) put user data table 1

am thinking wrong?
tips appreciated.

i misunderstood point of update script.
when app updated not install new database. keeps old 1 , runs update script bring old 1 speed.

so if dont need change user data not lost. run sql in script.

if need alter user data table can use temporary table change.

eg :

-- add fullnames column employees alter table "employees" rename 'employees_me_tmp';  create table "employees"  (     "employeeid" int not null,     "lastname" varchar(20) not null,     "firstname" varchar(10) not null,     "fullname" varchar(150),     primary key ("employeeid") );  insert "employees"   (     "employeeid",      "lastname",      "firstname",      "fullname" )  select      "employeeid",      "lastname",      "firstname",      "firstname" || ' ' || "lastname"       "employees_me_tmp";  drop table "employees_me_tmp";