where is discount stored in AR tables?

Hi ,

I was wondering where invoice discounts are stored in AR Tables.

the only table/column i could find is ap_payment_schedules_all.DISCOUNT_TAKEN_UNEARNED and DISCOUNT_TAKEN_EARNED .

is this the correct table/column ?

and as discount_date column in this table is no longer used , how do i exclude discount when calculating amount due remaining/ invoice balance as of date ?

Thanks

T.K