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elwayfan446
Barite | Level 11

Hi,

 

I can't figure out why this code is not working.  I am trying to insert dummy rows into this data set when there are no observations found on it.  If I run the proc sql alone, it will insert the rows.  However, when I use the call execute if noobs=0, no observations are inserted.

 

data _null_;
set msrflow.msrflow_loansfunded_10YR_append;
if nobs=0 then do;
call execute(
'proc sql; 
	insert into msrflow.msrflow_loansfunded_10YR_append 
			(
				PRIMARY_LOAN_KEY 
				,INVESTOR_LOAN_ID 
				,SELLER_LOAN_NUMBER 
				,PNC_LOAN_NUMBER 
				,STATUS 
				,INVESTOR 
				,FUNDING_DATE 
				,NOTE_BALANCE 
				,NOTE_RATE 
				,SERVICE_FEE 
				,LTV 
				,FICO 
				,SRP_RATE 
				,SRP_AMOUNT 
				,PRODUCT 
				,ESCROW_FLAG 
				,PURPOSE 
				,TIMEFRAME 
				,PCT_TOTAL_UPB_PURCHASE 
				,PCT_TOTAL_UPB_REFI 
				,PCT_TOTAL_CNT_ESCROW 
				,PCT_TOTAL_CNT_NONESCROW 
				,WGT_AVG_10YR 
			)
		values (0,"","","","","",.,0,0,0,0,0,0,0,"","","","MTD",0,0,0,0,0)
		values (0,"","","","","",.,0,0,0,0,0,0,0,"","","","YTD",0,0,0,0,0)
		values (0,"","","","","",.,0,0,0,0,0,0,0,"","","","LTD",0,0,0,0,0)
	;
quit;'
);
end;
run;
1 ACCEPTED SOLUTION

Accepted Solutions
mkeintz
PROC Star

When a set statement attempts to read beyond the end of a data set, the data step immediately stops.   With zero obs, the first SET provokes that response.   There is a way, however, to get the proper nobs:

 

data _null_;
  if 0 then set msrflow.msrflow_loansfunded_10YR_append nobs=nrecs;
  put nrecs=;
  if nrecs=0 then call execute ('....');
  stop;
run;

 

This works because:

  1. The is no attempt to read beyond the end of data  ("if 0" is always false).
  2. But the "nobs=..." option is evaluated prior to data reading, so NRECS will have a testable value.
  3. The "stop" statement is not necessary, but a good habit for cases like this.
--------------------------
The hash OUTPUT method will overwrite a SAS data set, but not append. That can be costly. Consider voting for Add a HASH object method which would append a hash object to an existing SAS data set

Would enabling PROC SORT to simultaneously output multiple datasets be useful? Then vote for
Allow PROC SORT to output multiple datasets

--------------------------

View solution in original post

3 REPLIES 3
Kurt_Bremser
Super User

Maxim 2: read the log. You'll find a NOTE that nobs is uninitialized. You forgot the nobs= option in the set statement, and you need to move the set statement after the end and before the run.

mkeintz
PROC Star

When a set statement attempts to read beyond the end of a data set, the data step immediately stops.   With zero obs, the first SET provokes that response.   There is a way, however, to get the proper nobs:

 

data _null_;
  if 0 then set msrflow.msrflow_loansfunded_10YR_append nobs=nrecs;
  put nrecs=;
  if nrecs=0 then call execute ('....');
  stop;
run;

 

This works because:

  1. The is no attempt to read beyond the end of data  ("if 0" is always false).
  2. But the "nobs=..." option is evaluated prior to data reading, so NRECS will have a testable value.
  3. The "stop" statement is not necessary, but a good habit for cases like this.
--------------------------
The hash OUTPUT method will overwrite a SAS data set, but not append. That can be costly. Consider voting for Add a HASH object method which would append a hash object to an existing SAS data set

Would enabling PROC SORT to simultaneously output multiple datasets be useful? Then vote for
Allow PROC SORT to output multiple datasets

--------------------------
elwayfan446
Barite | Level 11

Thank you both for the help.  Both solutions worked for me and were very helpful.

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