What is the Unix command to concatenate two files and merget it in to one ?

[babu_kilari4]

Hi Experts,

I have three jobs and each job creates a file. I want to run one more job which clubs these three files and merges it in to one.

I know the process of opening each file and appending it in to the target file using DATASET concept.

Instead of that, I want any UNIX Shell command so that I can call that directly from ABAP and execute it

Any help on this would be highly appreciated

Thanks in advance.

Babu Kilari

[Former Member]

Hello Babu,

We can very well call an OS command from within ABAP, but in your case, I don't think that is really required. Please find below a logic that might be helpful to you.

You have three files, whose contents needs to be merged into a single file.

Read the contents of each file and store it into an internal table.

DATA: command LIKE rs37a-line.
DATA: BEGIN OF tabl OCCURS 0,
          line(2000),
      END OF tabl.

command = 'cat /tmp/file1.txt'.

CALL 'SYSTEM' ID 'COMMAND' FIELD command
              ID 'TAB'     FIELD tabl-*sys*.

Internal table 'tabl' will contain the contents of the file.

Accumulate all the contents into a single file and upload to the application server using OPEN DATASET, TRANSFER DATASET and CLOSE DATASET.

Let me know if you need a more detailed explanation.

Regards

Sabu.

[babu_kilari4]

My main aim here is to eliminate one more internal table. Because, there will be lakhs of records and i dont want to loop on that final internal table using DATASET.

Simple Unix Command which combines the three files should do. Thats what I am searching for..

Thanks,

Babu Kilari

[Former Member]

Try this:

DATA: command LIKE rs37a-line.
DATA: BEGIN OF tabl OCCURS 0,
          line(2000),
      END OF tabl.
 
command = 'cat /tmp/file1.txt /tmp/file2.txt /tmp/file3.txt > /tmp/file4.txt'.
 
CALL 'SYSTEM' ID 'COMMAND' FIELD command
              ID 'TAB'     FIELD tabl-*sys*.

Regards

Sabu.

[babu_kilari4]

Thanx a lot for the reply