What is the use of overlay in JCL?

What is the use of overlay in JCL?

Overlay lets you change specific existing columns without affecting the entire record.

How do I use overlay in mainframe?

To overlay one or more single lines:

1. Type either M or C in the line command field of the line that is to be moved or copied.
2. To specify a single destination for the data that is to be moved or copied, type O in the line command field of the line that the moved or copied line is to overlay.
3. Press Enter.

What is Dfsort?

DFSORT is IBM’s high-performance sort, merge, copy, analysis, and reporting product for z/OS. With DFSORT, you can sort, merge, and copy data sets. You can use DFSORT to do simple tasks such as alphabetizing a list of names, or you can use it to aid complex tasks such as taking inventory or running a billing system.

When to use sort fields in OUTREC overlay?

Statement ‘SORT FIELDS=COPY’ is used here to indicate that all records will be copied from input file to output file. Statement ‘OUTREC OVERLAY= (11:11,10,TRAN=UTOL), is used here to specify that the field at position (11-20 i.e. length=10) of input file should be converted to lowercase and then it should be written to 11th position of output file.

What does the overlay concept mean in DFSORT?

In DFSORT the OVERLAY concept tells you that how to replace one character with other character. The speciality of this post tells how to write correct syntax for multiple overlay.

Is the DFSORT command good for record manipulation?

DFSORT is very good concept for record manipulation. As a mainframe resource, if you have command on DFSORT you will get many job opportunities. Read this book to get more exposure. In the join keys recently I used, in my work, Inrec, Outrec and Overlay in a sort card.

How is the OUTREC overlay used in mainframebug?

OUTREC OVERLAY It is used to reformat each record by specifying just the items that overlay specific columns. Overlay lets you change specific existing columns without affecting the entire record.