>>Yes, it has to be handled differently because of the time part.
>>
>>Assuming that lc_bdate and lc_edate are datetimes w/o time part
>>

>>...
>>  WHERE (  Inst_request.ir_orddte >= ?lc_bdate AND Inst_request.ir_orddte < (?lc_edate + 1) ;
>>...
>>

>
>
>Thanks Sergey, that worked great!

You're welcome.
BTW, you can use the same technique with other back ends, if necessary