Returns the size of the last record read, or, if the file is opened for output, returns the current record size
Category: External Files
FRLEN ( file-id )
file-id
specifies the identifier that was assigned when the file was opened, generally by the FOPEN function.
This example opens the file that is identified by the fileref MYFILE. It determines the minimum and maximum length of records in the external file and writes the results to the log:
%let fid=%sysfunc(fopen(myfile)); %let min=0; %let max=0; %if (%sysfunc(fread(&fid)) = 0) %then %do; %let min=%sysfunc(frlen(&fid)); %let max=&min; %do %while(%sysfunc(fread(&fid)) = 0); %let reclen=%sysfunc(frlen(&fid)); %if (&reclen > &max) %then %let max=&reclen; %if (&reclen < &min) %then %let min=&reclen; %end; %end; %let rc=%sysfunc(fclose(&fid)); %put max=&max min=&min;
Functions:
'FCLOSE Function' on page 519
'FOPEN Function' on page 550
'FREAD Function' on page 558
'MOPEN Function' on page 656