I have this long-running macro code to check for the existence of a local table but there are no statements after the THEN. What happens? What does SAS do? I'm just trying to understand the logic
/* make sure the local table exist */
%if %sysfunc(exist(cdm.&tablename)) %then;
%else %do;
%let man_month=%sysfunc(putn(%sysfunc(intnx(MONTH,%sysfunc(inputn(&sysdate9,date9.)),+1)),yymmn6.));
%return;
%end;
If this macro finds that the table exists, it does nothing. If it does not exists then it does the calculation in the %ELSE portion.
If this macro finds that the table exists, it does nothing. If it does not exists then it does the calculation in the %ELSE portion.
A more readable version would be to simply negate the condition :
%if not %sysfunc(exist(cdm.&tablename)) %then do;
%let man_month=....
%end;
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