Reseting file pointer to the 1st record once EOF is reached

dham.kamal · New User Joined: 13 Jul 2007 Posts: 9 Location: India

Hi

Am reading sequential file. I read a system date and check for a matching date in the file. If the date is not matching then i have to decrement the date by 1 and again scan the whole file for the new date. This processing needs to go on till i find the matching date in file.

Once i dont find the 1st date i need to reset the pointer to 1st record to scan it again from the start. Can you tell me any command which resets the pointer back to the first record.

Thanks for your help in advance.
Regards
Kamal

William Thompson · Posted: Fri Jul 13, 2007 11:41 am

Two commands, "CLOSE" followed by "OPEN".....

dham.kamal · New User Joined: 13 Jul 2007 Posts: 9 Location: India

William Thompson · Posted: Fri Jul 13, 2007 11:53 am

IQofaGerbil · Posted: Fri Jul 13, 2007 1:03 pm

You don't say what you will do once you have found the appropriate record in the file, so there may be a 'better' way of doing this
eg could you sort the file in date order perhaps?

If you expand your requirements for us someone might come up with a good, resource friendly solution.

notonly4u · New User Joined: 26 Apr 2005 Posts: 87 Location: Hyderabad

Hi Kamal,

Include sequence numbers at the end of each record through sort. Using the sequence number as the key, copy the records into a KSDS file. So, on reaching the EOF, move 00001 to the key, so that you can reach back to the first record.

Regards
Tanden