*<PRE>;

/*

Vicki Cook wrote:
> 
> I have just started programming in SAS this year and I am still looking
> for some basic programming features.  Does anyone know how to determine
> if a SAS file is empty within the program itself.  In other words when my
> program is passing data from proc to data steps at a certain point I want
> the code to check if the incoming file is empty and do something within
> the data step.  Perhaps there is SAS keyword for this?
> 
> Any help would be appreciated...
> 
> Vicki

-- 
Vicki,

Here is a MACRO we use here to determine if the dataset has any observations.
Try it out...


--------------------------------------------------------------------------
  Kimball R. Cook                           The opinions expressed are
  StorageTek, Louisville CO  USA            those of my own and do not
  kimball_cook@stortek.com                  reflect those of my employer.

snip------*/

%macro numobs (lib,dsn);
 %global num;
 %let num=0;
 proc sql noprint;
 select (nobs-delobs) into :num
   from dictionary.tables
   where libname="%upcase(&lib)"
     and memname = "%upcase(&dsn)";
 %let num=&num;
 %if &num=0  /* inserted by Arnold Schick */
   %then %put MACRO-NOTE: The data set %upcase(&dsn) in library %upcase(&lib) is empty or does not exist.;
   %else %put MACRO-NOTE: The data set %upcase(&dsn) in library %upcase(&lib) has &num observations.;

quit;
%mend numobs;

*</PRE>;
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