Interested to Buy Any Domain ? << Click Here >> for more details...
Hai friends
why we need to read a file before re-write a record?
- 7 Answers
- 13280 Views
- L&T, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / diwakar
Without knowing what field to rewrite we cannot use rewrite
the field in a record.Thats why we read the file first and
then rewrite the same
| Is This Answer Correct ? | 13 Yes | 0 No |
Answer / mf buzz
Hi,
For Rewrite, the file has to be opened in I-O mode. REWRITE
is used to update records. Rewrite statement will update
the last read record. Hence, we have to read the record to
be updated first. Hope this clarifies.
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / anna
All pr answers are not right.
We read the record first because :
a) we need to knouw if record is exist
b) if you do not read the record on output file will have
just field that you changed the rest will be blank.
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / ravi patnam
1) When you want to modify a record, first you have to get
that into memory from physical file by the way of reading.
2)Then do modifications.
3)After the modification over again put it bak to the
physical file by using 'Rewrite' command.
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / mallappa
Rewrite is nothing but Update so if you want to
modify/changes in the record you should read the record
first, which you want to
then you can rewrite it. I hope it will clarify your
doubts.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / guest
The file may be ESDS, RRDS or KSDS.
Assuming that the access mode is sequential.
If you are directly performing a 'REWRITE' operation it
will end oup with file status=43. Means'DELETE OR REWRITE &
NO GOOD READ FIRST'.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / viks
A disk file, for example MASTER FILE, can be opened as I-O,
which means records from the disk will be accessed, read,
changed, and rewritten.
| Is This Answer Correct ? | 1 Yes | 3 No |
how do you move only numeric data from A to B 01 A pic x(10) value 'a1b2c34d5e'. 01 B pic x(5).
how can we find total no of records in a file ....is there any utility......?
can i use multiple when statements in search & search all ? justify ur answer?
what is lrec=f,what is difference between f,fb,v,vb?what is default value?how do we came to know that records are in f,fb,v,vb?
Which is the best IBM mainframe Training Institute in Ameerpet, Hyderabad
If I want to increase the Limit in GDG. What should I do?
what is the diff b/w select stsmt and cursor ?
RENAME clause takes new SPACE in memory.TRUE or FALSE? a)TRUE 2)FALSE
i declare a Table as OCCURS 2000 TIMES.If the input file has more than 2000 records will the COBOL program fail?
1.Can we define condition-name conditions in FD entry.
what happens if parmparameter passes zero bytes to the program
What is JOBLIB and STEPLIB in JCL? what is the purpose of using it?
COBOL 
