Is the onUpgrade method ever called?

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For those of you who would like to know the exact moment when onUpgrade() gets called, it is during a call to either getReadableDatabase() or getWriteableDatabase().

To those who are not clear how it ensure it gets triggered, the answer is: It is triggered when the database version provided to the constructor of SqLiteOpenHelper is updated. Here is a example

public class dbSchemaHelper extends SQLiteOpenHelper {

private String sql;
private final String D_TAG = "FundExpense";
//update this to get onUpgrade() method of sqliteopenhelper class called
static final int DB_VERSION = 2; 
static final String DB_NAME = "fundExpenseManager";

public dbSchemaHelper(Context context) {
    super(context, DB_NAME, null, DB_VERSION);
    // TODO Auto-generated constructor stub
}

now to…onUpgrade()

@Override
public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) {
    sql = "ALTER TABLE " + fundExpenseSchema.Expense.TABLE_NAME + " ADD COLUMN " + fundExpenseSchema.Expense.FUNDID + " INTEGER";
    arg0.execSQL(sql);
}

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