Replace a particular record in file

surya anem · New User Joined: 20 Dec 2007 Posts: 54 Location: Hyderabad

Hi,
I have a set of records(say 100) in a file which are displayed in panels for the user to view or edit.
if a user edits the 51st record how do i write that particular record into the data file.

with regards,
surya

enrico-sorichetti · Posted: Tue Apr 29, 2008 4:18 pm

read into a stem all the records,
carry on the updates
rewrite the dataset/member from the stem
there is no way to update a single logical record in a PS datsset

dbzTHEdinosauer · Posted: Tue Apr 29, 2008 4:19 pm

your file. What kind of file is it?

surya anem · New User Joined: 20 Dec 2007 Posts: 54 Location: Hyderabad

It is a PS file.......(datafile)

surya anem · New User Joined: 20 Dec 2007 Posts: 54 Location: Hyderabad

Hi
if i have some millions of records and if i have updated just one field of one record..do i have to update all the records

thanks
surya

enrico-sorichetti · Posted: Tue Apr 29, 2008 4:22 pm

yes,

You will not be updating all the records
You will copy from the input dataset to the output dataset..

thats the basic rule of sequential dataset processing

superk · Posted: Tue Apr 29, 2008 5:26 pm

I have to double-check this, but I could swear that you can open a dataset and read a single record for update with EXECIO DISKRU, then write the single updated record back with the corresponding EXECIO DISKW, without having to process the entire dataset.

superk · Posted: Mon May 05, 2008 6:18 pm

I double-checked. You can update a single record. For example, if you have 10,000 records, and you want to update record 5000: