DATA Step, Macro, Functions and more

Length of macro variable

Accepted Solution Solved
Reply
Super Contributor
Posts: 673
Accepted Solution

Length of macro variable

proc sql;

           select distinct "'"||compress(networkid)||"'"

                  into :nwid SEPaRATED BY ","

                from a1.nw_master

             where srv>0;

               create table  a2.network_links as

                 select * from a1.nw_linkages

                  where id in (&&nwid.);

ERROR: The length of the value of the macro variable NWID (987973) exceeds the maximum length (65534). The value has been truncated

       to 65534 characters.

I thought all distinct values will be selected into nwid macro.


Accepted Solutions
Solution
‎01-29-2013 02:19 PM
Respected Advisor
Posts: 3,799

Re: Length of macro variable

This example is contrived but shows what you "could" do.

proc sql;
  
select * from sashelp.class
     
where name in(select name from sashelp.class where sex eq 'M');
   quit;
  
run;

View solution in original post


All Replies
Super Contributor
Posts: 578

Re: Length of macro variable

I'm not sure you need the double ampersand.

Solution
‎01-29-2013 02:19 PM
Respected Advisor
Posts: 3,799

Re: Length of macro variable

This example is contrived but shows what you "could" do.

proc sql;
  
select * from sashelp.class
     
where name in(select name from sashelp.class where sex eq 'M');
   quit;
  
run;
Super User
Posts: 19,877

Re: Length of macro variable

All distinct values will be selected but your string must be longer than the 65k character length.

You can check if that is the case by calculating the number of distinct network ID and then multiplying by 3+ length of network id: total length ~ # of distinct * (length of networkID + 3).

If thats close to 65K then you have a problem.

Super Contributor
Posts: 673

Re: Length of macro variable

Ok..If it greater than 65K sas cannot handle isnt it

Respected Advisor
Posts: 3,799

Re: Length of macro variable

You don't need the macro variable.

Super User
Posts: 19,877

Re: Length of macro variable

You can use a subquery as shown by Data _null_ or create a macro like identified in this link:

39605 - Create a string that goes beyond the 64K limit for macro variables

I'd go with a subquery, since both tables seem to be in the same location and it would be the fastest.

🔒 This topic is solved and locked.

Need further help from the community? Please ask a new question.

Discussion stats
  • 6 replies
  • 5330 views
  • 6 likes
  • 4 in conversation