RE: Move an entire record format as a whole

For instance with External Data Structures      

Create an EDS refering to the file name.
Create a field long enaugh for the whole record format (I usually do this
with data structure)
After file input move the EDS to the save field.

In reference to prior LOCK record discussion I have seen this used in
on-line update programs.

1. Chain to record without lock.
2. Move EDS to SVFLD1
3. Allow user change on display
4. Move EDS  (changed) to SVFLD2 
5. Chain to record with lock and compare EDS to SVFLD1.
6. If EDS and SVFLD1 match then SVFLD2 is moved into EDS before update.
7. If not, alert user and allow him to repeat process from 1 or quit.


An example in RPG/400:

 *external structure STRUCT for FILE1
ISTRUCT    E DS FILE1                           

 *Save field 1 defined as a structure without subfields 1000 long
ISVFLD1        DS                        1000

 *Save field 2 defined as a structure without subfields 1000 long
ISVFLD2        DS                         1000


C          KEY      CHAIN   FILE1                      N01
C                       MOVEL STRUCT  SVFLD1
C                       EXFMT  DISPLY
C                       MOVEL STRUCT  SVFLD2
C          KEY      CHAIN   FILE1                       01
 
C          SVFLD1 IFNE     STRUCT
C                       UNLCK  FILE1
C                       EXSR    ERROR
C                       ELSE
C                       MOVEL SVFLD2   STRUCT
C                       UPDAT  FILE1R
C                       ENDIF

 



> -----Original Message-----
> From: Brian Stapleton [SMTP:brianstapleton@yahoo.com]
> Sent: 7. júlí 1999 20:30
> To:   RPG List" Midrange
> Subject:      Move an entire record format as a whole 
> 
> Greetings;
> 
> Does anyone know if it is possible to move an entire record format to a
> holding field, or DS so that I can move my file pointer (another chain)
> but still access the old data?
> 
> Sware that I have done this before, but I seem to having an Amnesia
> attach.
> 
> 
> 
> ===
> Brian Stapleton
> BrianStapleton@yahoo.com
> 
> _________________________________________________________
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