COBOL FILE HANDLING

azar.mhd · New User Joined: 22 Feb 2010 Posts: 14 Location: Hyderabad

Hi ALL,

Can any one tell me about REWRITE comd in file handling. Please check my following requirement.

file1 , file2 and file3. All are sequential files.

I tried to open the files in input-output, output and input mode respectively.

I have read the records from file1 into file2 and written to file2. Then after i tried to read the file3 and written to the file1 using WRITE command. There am getting abend error when i tried to run it.

So can i use rewrite in this scenario...

And one more thing that ..

if i want to use rewrite command on a particular file, is that mandatory to open that file in i-o mode.

Thanks

Bill O'Boyle · Posted: Mon Mar 01, 2010 9:09 pm

Review the student sample programs -

www.ibmmainframes.com/programs.php

Bill

CICS Guy · Posted: Mon Mar 01, 2010 9:15 pm

You could start with Coding input and output statements for QSAM files in the Programming Guide...

superk · Posted: Mon Mar 01, 2010 9:18 pm

This stuff can be found in the COBOL reference manuals:

Table 45. Permissible statements for sequential files

dick scherrer · Posted: Mon Mar 01, 2010 9:51 pm

Hello,

Note: The data to be rewritten must be the same lentgh as the data read. . .

None of the sites i've ever supported permits REWRITE on any sequential files . . . Typically, there is a requirement that the file be "copied" with the changes applied (often requiring audit informaton about what was changed).