Re: ADS 11.10.0.24 Performance Issue

OR clauses are always difficult.

Maybe you can build the statement dynamically or make two cases out of it (untested, just to give you an idea what I am talking about):

//Run the script to test the issue

DECLARE@InputAccountNumber integer;
DECLARE@InputPostingDate date;

@InputPostingDate =null;
@InputAccountNumber = 1;

if @InputAccountNumber isnull then
  select*
  from#TEMP
  where(@InputPostingDate isnullor PostingDate <=@InputPostingDate )

else

  select*
  from#TEMP
  where(AccountNumber = @InputAccountNumber)
  and(@InputPostingDate isnullor PostingDate <=@InputPostingDate )

end if