topic Re: Error handling in Proc Sql in SAS Procedures

Error handling in Proc Sql

Pradeepbanu — Tue, 13 Mar 2018 06:06:17 GMT

I doing like this

libname DZY 'Path';
Proc sql;
select * from DZ.some_table;
run;

Here I have to add an error handling like if something goes wrong in select statement or within the block I have to write error message to an separate text file in the folder. This is what I tried

%macro sortclass;
 Proc sql;
    select * from DZ.some_table;
    run; 
%if &amp;amp;SQLRC gt 0 %then %goto error;
%error:
proc export data=""
run;

%exit:
%mend; 
%sortclass;

I am trying to do an try catch like error handling.., How can do this in effective way. Thanks In advance

Re: Error handling in Proc Sql

andreas_lds — Tue, 13 Mar 2018 08:19:11 GMT

You should not do this, because you have to re-invent what the sas interpreter already does: checking the syntax of your code.

Re: Error handling in Proc Sql

RW9 — Tue, 13 Mar 2018 09:24:20 GMT

Why? You can check the existence of dataset, which is something that maybe necessary. However with such simple code you should not need to check? This:

%macro sortclass;

Sounds to me like your trying to re-write SAS functionality which is both a waste of time, and less stable.

Re: Error handling in Proc Sql

ballardw — Tue, 13 Mar 2018 21:57:01 GMT

@Pradeepbanu wrote:

I doing like this
libname DZY 'Path';
Proc sql;
select * from DZ.some_table;
run; 
Here I have to add an error handling like if something goes wrong in select statement or within the block I have to write error message to an separate text file in the folder. This is what I tried
%macro sortclass;
 Proc sql;
    select * from DZ.some_table;
    run; 
%if &amp;amp;SQLRC gt 0 %then %goto error;
%error:
proc export data=""
run;

%exit:
%mend; 
%sortclass;
I am trying to do an try catch like error handling.., How can do this in effective way. Thanks In advance

Your proc export is going to throw an error as you are missing ; and you are missing an OUTFILE option.

Since %exit is not referenced that will generate errors in the log. Also since you do not have anything that skips your proc export it will execute every time. See this code for examples:

Wrong as it output the value regardless of the value of the test.

%macro dummy(value);
%if &value= 3 %then %goto error;

%error: %Put the value of value is &value;
%mend;

%dummy(3);
%dummy(5);

Marginally better as only has the output when the test is true:

%macro dummy2(value);
%if &value=3 %then %goto error;
%else %goto exit;
%error: %Put the value of value is &value;
%exit:
%mend;

%dummy2(3);
%dummy2(5);

Re: Error handling in Proc Sql

Pradeepbanu — Tue, 13 Mar 2018 21:31:28 GMT

Thanks this is an excellent solution.., I have a question in writing file??

libname DZ 'Dataset';
%macro dummy2(value);
proc sql;
select * from DZ.HighV_Trans /* misspelled */
run;

%if &value=3 %then %goto error;
%else %goto exit;
%error:

/* here how do I write error in this file?? */

proc export data = ??
outfile ="C/Pradeep/Log.txt"
/*dbms = csv replace;*/
run;
%Put the value of value is &value;
%exit:
%mend;

%dummy2(3);
%dummy2(5);