How to Full optimize below Select - sql ?

clear 
Local lcLiftcond
Close Databases All
Use 1001\psaudac In 0
Use 1001\psaudam In 0
Use 1001\customer In 0
Use 1001\pcode1 In 0

lcLiftcond = '.T.'

Do Case
        Case Thisform.Optiongroup1.Value = 1   &&  All Records
		Thisform._lcliftdate = ".T."
	Case Thisform.Optiongroup1.Value = 2   &&  Only Pending Records
		Thisform._lcliftdate = "empty(liftdate)"
	Case Thisform.Optiongroup1.Value = 3   &&  Only Final Records
		Thisform._lcliftdate = "not empty(liftdate)"
Endcase

lcLiftcond = Thisform._lcliftdate

= Sys(3054, 1)


Select 0
Select ;
		Str(Val(psaudam.saudano), 10) As dono, ;
		godown.acname As locname, ;
		party.acname As acname, ;
		pcode1.wood As prodname, ;
		mill.acname As millname, ;
		psaudac.Lotno, ;
		psaudac.Bags, ;
		psaudac.Weight, ;
		psaudac.liftdate, ;
		psaudac.Rem1, ;
		psaudac.Childid ;
	From psaudam ;
	Left Outer Join customer godown ;
		On godown.accode = psaudam.loccode ;
	Left Outer Join customer party ;
		On party.accode = psaudam.accode ;
	inner Join psaudac ;
		On psaudac.Masterid = psaudam.Masterid ;
	Left Outer Join pcode1  pcode1 ;
		On pcode1.pcode = psaudac.pcode ;
	Left Outer Join customer mill ;
		On mill.accode = psaudac.millcode ;
	Where psaudam.trnstatus = 'YO' ;
		And &lcLiftcond ;
	Order By 1 ;
	Into Cursor junk1 Readwrite

**  if i remove below code then it is fully optimized, but how to optimize including below code
*		And &lcLiftcond ;

What alternate we can use for " And &lcLiftcond " ?

Warm Regards,
mk.