Macros 宏变量值的SAS长度超过最大长度

嗨，我正试图使用下面的代码为数据集中的每一行调用一个宏

proc sql;
select cats('%run_procreg(name=',name,',month=',month,')') into :macrocalllist
  separated by ' ' from dataset_a;
quit;


&macrocalllist;

我得到了“可变最大长度”错误：

宏变量MACROCALLLIST（65540）值的SAS长度 超过最大长度（65534）。该值已被删除
截断为65534个字符

因为数据集中的行数太多。你能推荐一个工作环境吗

---

谢谢，调用执行是一种选择。它允许您使用数据集中的数据生成一系列宏调用，而无需将宏调用存储在宏变量中

例如：

%macro testprint(data=,obs=);
  proc print data=&data (obs=&obs);
  run;
%mend testprint;

data _null_;
  input datasetname $13. obs;
  call execute('%nrstr(%testprint(data='||datasetname
                               ||',obs='||put(obs,1.)
                               ||'))'
               );
  cards;
sashelp.shoes 3
sashelp.class 5
;

日志将显示：

NOTE: CALL EXECUTE generated line.
131  ;
1   + %testprint(data=sashelp.shoes,obs=3)    
NOTE: There were 3 observations read from the data set SASHELP.SHOES.   
2   + %testprint(data=sashelp.class,obs=5)    
NOTE: There were 5 observations read from the data set SASHELP.CLASS.

---

调用执行是一个选项。它允许您使用数据集中的数据生成一系列宏调用，而无需将宏调用存储在宏变量中

例如：

%macro testprint(data=,obs=);
  proc print data=&data (obs=&obs);
  run;
%mend testprint;

data _null_;
  input datasetname $13. obs;
  call execute('%nrstr(%testprint(data='||datasetname
                               ||',obs='||put(obs,1.)
                               ||'))'
               );
  cards;
sashelp.shoes 3
sashelp.class 5
;

日志将显示：

NOTE: CALL EXECUTE generated line.
131  ;
1   + %testprint(data=sashelp.shoes,obs=3)    
NOTE: There were 3 observations read from the data set SASHELP.SHOES.   
2   + %testprint(data=sashelp.class,obs=5)    
NOTE: There were 5 observations read from the data set SASHELP.CLASS.

---

数据集中有多少行？数据集中有多少行？