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SAS - Temp dataset with DISP=MOD


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vasanthz

Global Moderator


Joined: 28 Aug 2007
Posts: 1692
Location: Tiruppur, India

PostPosted: Tue Jun 24, 2014 2:00 am
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Hi,

There is a JCL DD statement which allocates a TEMP file with DISP=MOD.
Code:
//TEMP     DD DSN=&&TEMP,DISP=(MOD,PASS),SPACE=(TRK,(5,2)),
//       DCB=(RECFM=VB,LRECL=2500,BLKSIZE=27998)
I need to convert this into SAS FILENAME statement.

Tried the below code as given in support.sas.com/documentation/cdl/en/hosto390/61886/HTML/default/viewer.htm#mvs-allexf-ufs.htm
Code:
FILENAME TEMP '&TEMP' DISP=NEW SPACE=(TRK,(3,1))
         LRECL = 2500 RECFM = VB BLKSIZE = 27998;
FILENAME TEMP '&TEMP' DISP=MOD;

But this file is still being written in DISP=OLD.

Test program:
Code:
FILENAME TEMP '&TEMP' DISP=NEW SPACE=(TRK,(3,1))
         LRECL = 2500 RECFM = VB BLKSIZE = 27998;
FILENAME TEMP '&TEMP' DISP=mod;
/* this step writes one record into temp file */
data think;
file temp;
put ' hello';
run;
/* this step writes second record into temp file */
data next;
file temp;
put 'world';
run;
/* this step reads the temp file and wrrites it into log */
data _null_;
infile temp;
input;
put _infile_;
run;


Expected output in SAS log:
Code:
hello
world

Actual output in SAS log:
Code:
world


Could you please let me know how to allocate a TEMP file with DISP=MOD in SAS. I cannot use JCL since there are a lot of TEMP files and the number of temp datasets are dynamic.
Thanks & Regards,
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Bill Woodger

Moderator Emeritus


Joined: 09 Mar 2011
Posts: 7310
Location: Inside the Matrix

PostPosted: Tue Jun 24, 2014 2:23 am
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What about coding a disposition for termination? KEEP?
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vasanthz

Global Moderator


Joined: 28 Aug 2007
Posts: 1692
Location: Tiruppur, India

PostPosted: Tue Jun 24, 2014 11:59 am
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Hello Bill,
Yup tried coding termination parameter as well. Still the same issue.
The file is being treated as disp = old.

Thanks,
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vasanthz

Global Moderator


Joined: 28 Aug 2007
Posts: 1692
Location: Tiruppur, India

PostPosted: Tue Jun 24, 2014 7:19 pm
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Hello,
This method worked.

Mentioning MOD in the FILE statement.

Code:
FILENAME TEMP '&TEMP' DISP=NEW SPACE=(TRK,(3,1))
         LRECL = 2500 RECFM = VB BLKSIZE = 27998;
/* this step writes one record into temp file */
data think;
file temp mod;
put 'hello';
run;
/* this step writes second record into temp file */
data next;
file temp mod;
put 'world';
run;
/* this step reads the temp file and wrrites it into log */
data _null_;
infile temp;
input;
put _infile_;
run;


Regards,
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