BookmarkSubscribeRSS Feed
deleted_user
Not applicable
I have two MACROs defined using the same maco variables as the following:

%MACRO func_1(datain, dataout, var_list);
........
%mend;

%MACRO func_2(datain, dataout, var_list);
.....
%mend;

In the same SAS session, if I may run both two macros several times,
should I do something to release the macro variables? How?

Thanks in advance.
2 REPLIES 2
Cynthia_sas
SAS Super FREQ
Hi:
Macro variables that are parameters to the macro program (yours are positional parameters) are LOCAL in scope to the Macro program. So when %func_1 is over, its macro variables are automatically "cleaned up" -- the LOCAL macro symbol table goes away when the macro program finishes. Unless those macro variables were previously defined to be GLOBAL in scope. The same applies to %func_2.

You might have referencing issues if %func_1 called %func_2 or vice versa. But generally you won't need to manually do any cleanup. Although if you DID need to ever do cleanup, there are ways to do it...from the simple %let:

%let var_list=; <--- which blanks out the macro variable value

to the complex -- the CALL SYMDEL or %SYMDEL statements (http://support.sas.com/documentation/cdl/en/mcrolref/59526/HTML/default/a001651249.htm ).

cynthia
deleted_user
Not applicable
great help.

Thank you so much.

sas-innovate-2024.png

Join us for SAS Innovate April 16-19 at the Aria in Las Vegas. Bring the team and save big with our group pricing for a limited time only.

Pre-conference courses and tutorials are filling up fast and are always a sellout. Register today to reserve your seat.

 

Register now!

How to Concatenate Values

Learn how use the CAT functions in SAS to join values from multiple variables into a single value.

Find more tutorials on the SAS Users YouTube channel.

Click image to register for webinarClick image to register for webinar

Classroom Training Available!

Select SAS Training centers are offering in-person courses. View upcoming courses for:

View all other training opportunities.

Discussion stats
  • 2 replies
  • 698 views
  • 0 likes
  • 2 in conversation