sas - 使用调用执行时的宏变量问题

Question

我下面有 2 个宏，我试图像使用元数据表和数据步骤中的调用执行命令的循环一样，一个接一个地执行。

宏 %TWO 需要全局变量 &names_agg。应该在宏 %ONE 中创建。但是在下面的代码中， &names_agg 在我第一次运行时是空白的。如果我再次运行它，它只会保留上次运行时的值。

这个想法是每次运行 %ONE 时，都会生成一个新的 &names_agg。被 build 。

我究竟做错了什么？

谢谢

%macro ONE(condition); 
%global names_agg;  
%let names_agg = ; 

proc sql;
    select 
        cats(name,"_agg"),
    into 
        :names_agg separated by " ",
    from dataset
    where condition = "&condition."
    ;
quit;
%mend;

%macro TWO(name_OT);

data &name_OT.;
    set &names_agg.;
run;

%mend;

data _null_;
  length code $32767;
  set meta_table;
  code = "%ONE(" || cats(condition) || "); %TWO(" || cats(Name_OT) || ");";
  call execute(code);
run;

抱歉日志困惑，这是实际代码。问题在于 NAMES_AGG_A _B 和 _C 没有正确解析

871  data test;
872    length code $32767;
873    set c.new_name_OT (obs=1);
874    code = '%OT_Append(' || cats(portfolio) || ',' || cats(scorecard) || ',' ||
874! cats(event_table) || ',' ||
875          cats(scorecard_type) || ',' || cats(obs_period) || ',' || cats(outcome_period) ||
875! ',' || cats(x_var) ||
876          ',' || cats(y_var) || ',' || cats(use) || ',' || cats(condition) || '); %put
876! &names_agg_a.; %OT_Append2(' || cats(Name_OT) || ');';
877    call execute(code);
878  run;

MLOGIC(OT_APPEND):  Beginning execution.
MLOGIC(OT_APPEND):  Parameter PORTFOLIO has value MTG
MLOGIC(OT_APPEND):  Parameter SCORECARD has value A
MLOGIC(OT_APPEND):  Parameter EVENT_TABLE has value event_table_name
MLOGIC(OT_APPEND):  Parameter SCORECARD_TYPE has value Application
MLOGIC(OT_APPEND):  Parameter OBS_PERIOD has value 1
MLOGIC(OT_APPEND):  Parameter OUTCOME_PERIOD has value 18
MLOGIC(OT_APPEND):  Parameter X_VAR has value PI
MLOGIC(OT_APPEND):  Parameter Y_VAR has value GB_Odds
MLOGIC(OT_APPEND):  Parameter USE has value Development
MLOGIC(OT_APPEND):  Parameter CONDITION has value
MLOGIC(OT_APPEND):  %LET (variable name is NAMES_AGG_A)
MLOGIC(OT_APPEND):  %LET (variable name is NAMES_AGG_B)
MLOGIC(OT_APPEND):  %LET (variable name is NAMES_AGG_C)
MPRINT(OT_APPEND):   proc sql;
SYMBOLGEN:  Macro variable PORTFOLIO resolves to MTG
SYMBOLGEN:  Macro variable SCORECARD resolves to A
SYMBOLGEN:  Macro variable EVENT_TABLE resolves to event_table_name
SYMBOLGEN:  Macro variable SCORECARD_TYPE resolves to Application
SYMBOLGEN:  Macro variable OBS_PERIOD resolves to 1
SYMBOLGEN:  Macro variable OUTCOME_PERIOD resolves to 18
SYMBOLGEN:  Macro variable X_VAR resolves to PI
SYMBOLGEN:  Macro variable Y_VAR resolves to GB_Odds
SYMBOLGEN:  Macro variable USE resolves to Development
SYMBOLGEN:  Macro variable CONDITION resolves to
MPRINT(OT_APPEND):   select cats("c.",name,"_agg_a"), cats("c.",name,"_agg_b"),
cats("c.",name,"_agg_c") into :names_agg_a separated by " ", :names_agg_b separated by " ",
:names_agg_c separated by " " from c.datasets_pit where portfolio = "MTG" and scorecard = "A"
and event_table = "event_table_name" and scorecard_type = "Application" and obs_period = 1 and
outcome_period = 18 and x_var = "PI" and y_var = "GB_Odds" and use = "Development" and
condition = "" ;
MPRINT(OT_APPEND):   quit;
MLOGIC(OT_APPEND):  Ending execution.
SYMBOLGEN:  Macro variable NAMES_AGG_A resolves to

本质上问题就在这里，上面调用execute中的put语句表明NAMES_AGG_A解析为空。

NOTE: DATA statement used (Total process time):
      real time           0.00 seconds
      cpu time            0.00 seconds

MLOGIC(OT_APPEND2):  Beginning execution.
MLOGIC(OT_APPEND2):  Parameter NAME_OT2 has value MTG_Dev_OT_1
SYMBOLGEN:  Macro variable NAME_OT2 resolves to MTG_Dev_OT_1
MPRINT(OT_APPEND2):   data c.MTG_Dev_OT_1_ODDS;
SYMBOLGEN:  Macro variable NAMES_AGG_A resolves to
MPRINT(OT_APPEND2):   set ;
MPRINT(OT_APPEND2):   run;
SYMBOLGEN:  Macro variable NAME_OT2 resolves to MTG_Dev_OT_1
MPRINT(OT_APPEND2):   data c.MTG_Dev_OT_1_GINI;
SYMBOLGEN:  Macro variable NAMES_AGG_B resolves to
MPRINT(OT_APPEND2):   set ;
MPRINT(OT_APPEND2):   run;
SYMBOLGEN:  Macro variable NAME_OT2 resolves to MTG_Dev_OT_1
MPRINT(OT_APPEND2):   data c.MTG_Dev_OT_1_DIST;
SYMBOLGEN:  Macro variable NAMES_AGG_C resolves to
MPRINT(OT_APPEND2):   set ;
MPRINT(OT_APPEND2):   run;
MLOGIC(OT_APPEND2):  Ending execution.
NOTE: There were 1 observations read from the data set C.NEW_NAME_OT.
NOTE: The data set WORK.TEST has 1 observations and 12 variables.

NOTE: CALL EXECUTE generated line.
1   +       proc sql;
1   +                         select             cats("c.",name,"_agg_a"),
cats("c.",name,"_agg_b"),             cats("c.",name,"_agg_c")         into
:names_agg_a separated by " ",             :names_agg_b separated by " ",
2   + :names_agg_c separated by " "         from c.datasets_pit             where portfolio =
"MTG" and                 scorecard = "A" and                 event_table = "event_table_name"
and                 scorecard_type = "Application" and
3   + obs_period = 1 and                 outcome_period = 18 and                 x_var = "PI"
and                 y_var = "GB_Odds" and                 use = "Development" and
  condition = ""         ;     quit;; data c.MTG_Dev_OT_1_ODDS;     set
NOTE: PROCEDURE SQL used (Total process time):
      real time           0.01 seconds
      cpu time            0.00 seconds


4   + ; run;

NOTE: There were 1 observations read from the data set WORK.TEST.
NOTE: The data set C.MTG_DEV_OT_1_ODDS has 1 observations and 12 variables.
NOTE: DATA statement used (Total process time):
      real time           0.00 seconds
      cpu time            0.00 seconds


4   +         data c.MTG_Dev_OT_1_GINI;     set ; run;

NOTE: There were 1 observations read from the data set C.MTG_DEV_OT_1_ODDS.
NOTE: The data set C.MTG_DEV_OT_1_GINI has 1 observations and 12 variables.
NOTE: DATA statement used (Total process time):
      real time           0.00 seconds
      cpu time            0.00 seconds


4   +                                                   data c.MTG_Dev_OT_1_DIST;     set ; run;

NOTE: There were 1 observations read from the data set C.MTG_DEV_OT_1_GINI.
NOTE: The data set C.MTG_DEV_OT_1_DIST has 1 observations and 12 variables.
NOTE: DATA statement used (Total process time):
      real time           0.00 seconds
      cpu time            0.00 seconds

Answer 1

您可以使用 %nrstr() 延迟宏调用，然后它工作正常。

   /* test data */
   data dataset;
     name="a"; condition="1"; output;
     name="b"; condition=" "; output;
     name="c"; condition="1"; output;
   run;

   data a_agg; v="a_agg"; run;
   data b_agg; v="b_agg"; run;
   data c_agg; v="c_agg"; run;

   data meta_table;
     condition="1"; name_ot="ot1"; output;
     condition="2"; name_ot="ot2"; output;
     condition=" "; name_ot="ot_"; output;
   run;

   %macro one(condition); 
     %global names_agg;  
     %let names_agg = ; 
     proc sql noprint;
       select cats(name,"_agg") into :names_agg separated by " "
       from dataset where condition = "&condition.";
     quit;
   %mend;

   %*-- just checking --*;
   %one(condition=1) %put names_agg=&names_agg;
   %one(condition=2) %put names_agg=&names_agg;
   %one(condition= ) %put names_agg=&names_agg;
   %*-- on log
   names_agg=a_agg c_agg
   names_agg=
   names_agg=b_agg
   --*;

   %macro two(name_ot);
     %if &names_agg= %then %do;
       data &name_ot.; run;
     %end; %else %do;
       data &name_ot.;
         set &names_agg.;
       run;
     %end;
   %mend;

  data _null_;
      length code $200;
      set meta_table;
      code = catt('%one(', condition, ")");
      code = catt(code, '%two(', name_ot, ")");
      code = catt('%nrstr(', code, ")");
      call execute(code);
   run;

   /* check */
   title ot1; proc print data=ot1; run; title;
   /* on lst
   ot1
   Obs      v
    1     a_agg
    2     c_agg
   */
   title ot2; proc print data=ot2; run; title;
   /* on log
   NOTE: No variables in data set WORK.OT2.
   */
   title ot_; proc print data=ot_; run; title;
   /* on lst
   ot_
   Obs      v
    1     b_agg
   */