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how to check if an Excel file is empty before doing a proc import procedure

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Contributor
Posts: 24

how to check if an Excel file is empty before doing a proc import procedure

Hello,

 

I would like to create a macro that check if the excel file is empty or not before doing a proc import.

I am using Sas Enterprise Guide 5.1

 

The idea is the following.  Suppose that I first test if my excel file is empty.

There is only two possible answers : yes or no.

 

If the file is empty do Steps A

Otherwise do Steps B.

 

I am able to ckeck if the file exist first.  But how can I check if the Excel file (*.xlsx) is empty before doing a proc import?

 

%macro test(Dir=, FileName=);

%let filrf=myfile;

%if %sysfunc(fileexist(&Dir.\&FileName.)) %then

%do;

%put the file &FileName exist;

 

%end;

%else %put the file &FileName does not exist;

%mend test;

%test(Dir=c:\Travail\Temp2\, FileName= File1.xlsx);

 

Esteemed Advisor
Esteemed Advisor
Posts: 7,249

Re: how to check if an Excel file is empty before doing a proc import procedure

Define empty?  An xlsx file is never empty, and XLSX file is a ZIP file containing some folders, and some XML files at minimum.  I assume you mean that it contains no data yes?  If so just run the proc import, then test the dataset which is created - either as exist() function, or taking number of observations from the created dataset (can't remember if proc import creates and empty dataset for no data or not).  There's no direct way to ascertain numbe of observations before import, even libname to an xlsx file will do a sort of import.

Contributor
Posts: 26

Re: how to check if an Excel file is empty before doing a proc import procedure

This is the correct way to go about it!
Grand Advisor
Posts: 9,593

Re: how to check if an Excel file is empty before doing a proc import procedure

Check ANY attribute.



data x;
 set sashelp.class;
 stop;
run;

%let dsid=%sysfunc(open(x));
%let any=%sysfunc(attrn(&dsid,any));
%let dsid=%sysfunc(close(&dsid));

%put &any ;

Contributor
Posts: 24

Re: how to check if an Excel file is empty before doing a proc import procedure

Hello KSsharp,

 

I have try your solution and it works fine if your worksheet have at least the variable names in it.  I am not sure that it will works with a new excel file (empty).

 

Thanks for your help which is always apprecitated.

Alain

Grand Advisor
Posts: 9,593

Re: how to check if an Excel file is empty before doing a proc import procedure

The code will return different value according to you have no obs, no variable, both no obs and no variable.


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