Need exit help

Hi experts,

I need to put a default value of 3 months for the posting date variable in one query.

Could someone help me on this?

if i_step = 1.

    l_s_range-low = ?

    l_s_range-high = ?

    l_s_range-sign = 'I'.

    l_s_range-opt = 'BT'.

    append l_s_range to e_t_range.

  endif.

here high value should the last day of the current month (july 31st ) and low value should be the first day of the previous 3 months (may 01st).

Thanks,

Sathya