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IBMSystem/3
RPGll DiskFileProcessing
Programmer'sGuide
Pageof cC21 7566 1
lssued30 June 1978
Bv TN L: GN2 tr-5625
SecondEdition (July 1974)
T h i s i s e r m a j o r r e v i s i o n o f , a n d o b s o l e t e s ,G C 2 1 - 7 5 6 6 - 0 a n d T e c h n i c a l N e w s l e t t e r
G N 2 1 - 7 6 5 7 . T h i s m a n u a l h a s b e e n e x t e n s i v e l v r e v i s e da n d s h o u l d b e r e v i e w e d i n
rtsentrr{.'tY.
Information concerningIBM System/3 Model 15 hasbeenadded to the manual, The
entire section entitled Chapter 5. Using Console Devices has been removed from
t h i s m a n u a l . T h e K E Y ( M o d e l 6 o n l y ) a n d D S P L Y o p e r a t i o n c o d e s ,f o r m e r l y d e s c r i b e d
i n C h a p t e r5 , a r e d e s c r i b e d n y o u r R P G l l r e f e r e n c e a n u a l . F o r i n f o r m a t i o n
i m
c o n c e r n i n gt h e R P G l l l n q u i r y f a c i l i t y ( R o l l o u t / R o l l i n ) ,a l s o f o r m e r l y d e s c r i b e d n
i
Chapter 5.see Related Publications, listed in the Preface.
C h a n g e s r e p e r i o d i c a l l y m a d e t o t h e i n f o r . n a t i o n h e r e i n ;b e f o r e u s i n g t h i s p u b l i c a t i o n
a
in connection with the operation of IBM systems, refer to the IBM System/3
B i b l i o g r a p h y , G C 2 0 - 8 O 8 Of,o r t h e e d i t i o n s t h a t a r e a p p l i c a b l ea n d c u r r e n t .
U s e t h i s p u b l i c i a t i o no n l V f o r t h e p u r p o s e ss t a t e d i n t h e P r e f a c e .
P u b l i c a l i o n s a r e n o t s t o c k e d a t t h e a d d r e s sb e l o w . R e q u e s t sf o r c o p i e s o f I B M
p u b l i c a t i o n sa n d f o r t e c h n i c a l i n f o r m a t i o n a b o u t t h e s y s t e m s h o u l d b e m a d e t o y o u r
I B M r e p , r e s e n t a t i vo r t o t h e I B M b r a n c h o f f i c e s e r v i n gy o u r l o c a l i t y .
e
T h i s p u l l l i c a t i o n c o u l d c o n t a i n t e c h n i c a l i n a c c u r a c i e s r t y p o g r a p h i c a le r r o r s . U s e t h e
o
R e a d e r ' sC o m m e n t F o r m a t t h e b a c k o f t h i s p u b l i c a t i o n t o m a k e c o m m e n t s a b o u t t h i s
p u b l i c a t i o n . l f t h e f o r m h a s b e e n r e m o v e d ,a d d r e s sy o u r c o m m e n t s t o I B M C o r p o r a t i o n ,
P u b l i c a t i o n s ,D e p a r t m e n t 2 4 5 , R o c h e s t e r ,M i n n e s o t a 5 5 9 O 1 . C o m m e n t s b e c o m e t h e
p r o p e r t ' yo f l B M .
O C o p y r i g h t I n t e r n a t i o n a B u s i n e s M a c h i n e s o r p o r a t i o n1 9 7 1 , 1 9 7 4
l s C
P a g e o f G C 2 1, 7 5 6 6 - 1
lssued30 June 1978
By TNL: GN21-5625
Preface
This manualexplains the RPG ll specif ications necessarv RelatedPublications
t o p r o c e sd i s kf i l e su s i n g h e I B M S y s t e m / 3 o d e l6 ,
s t M
M o d e l1 0 D i s kS y s t e ma n d M o d e l1 5 . T h e f o l l o w i n g
. T h e s e u b l i c a t i o na r er e c o m m e n d e d r a d d i t i o n a l
p s fo
typesof f ilesarediscussed: reference:
o Sequential
GeneralSystem/3
o Indexed
. l8M System/3 Disk Conceptsand Planning Guide,
. Direct GC21.7571
o RecordAddress
RPG ll References
I n c l u d e d r ee x a m p l eo f c r e a t i n g n d m a i n t a i n i ne a c h
a s a g
f
o f t h e s e i l et y p e s . F o r i n f o r m a t i o n n h o w t h i s p u b -
o . IBM System/3 Model 6 RPG ll ReferenceManuar.
lication should be read, seeHow to Use This Publication, sc21-7517
t o l l o w i n g h e t a b l eo f c o n t e n t s .
t
. IBM System/3 RPG ll Reference
Manual SC21-7504
.
This manualis intended programmers for who havea
b a s i c n o w l e d g o f t h e R P Gl l l a n g u a g en c l u d i n gh e
k e i, t
a b i l i t yt o d e s c r i b s e q u e n t i a ln d i n d e x e di l e sa s
e a f OCL References
input f iles. The reader must be familiarwith the
information presented inthe IBM System/3 Disk Con- . IBM System/3 Models 8 and | 0 System Controt
ceptsand PlanningGuide, GC21-7571. Programming Reference Manual, GC2l-7512
. IBM System/3 Model l5 System Control programming
Note: lsy detailedinformationconcerning multi- ReferenceManual, GC21-5O77
volumedisk files - concepts; OperationControl Lan-
guage considerations; -
RPG I I processing seethe . IBM System/3 Models 4 and 6 Operation Control
publicationslisted under RelatedPublicationswhich Languageand Disk Utility ProgramsReference
areappropriate your System/3
for model. Manual. GC21-7516
. IBM System/3 Model l5 SystemControl programming
Conceptsand Reference Manual. GC21 5162
Contents
CHAPTER 1. SEOUENT]AL FILES. 1
C r e a t i n ga S e q u e n t i a lF i l e 1
Input Records 3
Output Record 3
M a i n t a i n i n g a S e q u e n t i a lF i l e 6
Adding Records 7
T a g g i n gR e c o r d sf o r D e l e t i o n 16
Updating Records 16
Reorganizing File a 22
CHAPTER 2. INDEXED FILES 26
C r e a t i n ga n I n d e x e d F i l e 26
C r e a t i n ga n O r d e r e d l n d e x e d F i l e . 27
C r e a t i n ga n U n o r d e r e d I n d e x e d F i l e 2a
Input Record N
Output Record 29
M a i n t a i n i n g n I n d e x e dF i l e
a 31
Updating Records 32
Adding Records 37
T a g g i n g R e c o r d sf o r D e l e t i o n 49
Reorganizing File a 49
O t h e r W a y s t o P r o c e s sI n d e x e d F i l e s 50
Processing n Indexed File Consecutively
a 50
Processing n lndexed File Randomly by
a
RelativeRecord Number 50
CHAPTER 3. DIRECT FILES 51
C r e a t i n ga D i r e c t F i l e 51
R?
C r e a t i n ga D i r e c t F i l e w i t h o u t S y n o n y m s
Input Record 54
OutDut Record 54
C r e a t i n ga D i r e c t F i l e w i t h S y n o n y m s 58
R e t r i e v a lo f R e c o r d si n a D i r e c t F i l e 60
C o n s e c u t i v eR e t r i e v a l 61
Random Retrieval 66
Maintaining DirectFile
a 70
Adding Records 70
T a g g i n gR e c o r d sf o r D e l e t i o n 70
t l
Updating Records
CHAPTER 4. RECORD ADDRESS FILES . 79
F i l e sC o n t a i n i n g R e l a t i v eR e c o r d N u m b e r s
(ADDROUT Files) 79
Creating n ADDROUT File
a 79
P r o c e s s i nb y a n A D D R O U T F i l e .
g 80
F i l e sC o n t a i n i n g R e c o r d K e y L i m i t s 83
C r e a t i n ga F i l e w i t h R e c o r d K e y L i m i t s 83
P r o c e s s i n g e q u e n t i a l l yw i t h i n L i m i t s
S 84
INDEX 89
How To Use This Publication
T h i s p u b l i c a t i o ni s d i v i d e d i n t o f o u r c h a p t e r s :
t. S e q u e n t i a lF i l e s
2. IndexedFiles
? Direct Files
4. Record Address Files
Each of the chapters discusses the RPG | | specificationsneededto create and
m a i n t a i n a c e r t a i nt y p e o f f i l e . S i n c et h e d i s c u s s i o n is e a c h c h a p t e r a p p l y t o
n
a p a r t i c u l a rf i l e o r g a n i z a t i o n y o u n e e d r e a d o n l y t h e c h a p t e r f o r t h e f i l e
.
organization ou will use.
y
T h i s m a n u a l i s d e s i g n e d o s h o w y o u t h e e n t r i e st h a t m u s f b e m a d e i n o r d e r f o r
t
t h e s y s t e mt o i d e n t i f y t h e f i l e a n d d e t e r m i n ew h a t f u n c t i o n s a r e t o b e d o n e . O t h e r
e n t r i e sw i l l b e n e e d e d ,b u t t h e y d e p e n do n t h e j o b y o u a r e d o i n g . R e f e r t o t h e r e f -
e r e n c em a n u a l f o r y o u r s y s t e m i f y o u n e e d i n f o r m a t i o n o n t h e s e a d d i t i o n a le n t r i e s .
Note Concerning Examples
M o s t o f t h e e x a m p l e si n t h i s m a n u a l u s e M F C U i n p u t f i l e s a n d u s e 9 6 - c o l u m n c a r d
i m a g e s o r e p r e s e n t n p u t r e c o r d s . T h i s d o e sn o t i m p l y t h a t e i t h e r t h e M F C U o r
t i
9 6 - c o l u m nc a r d sm u s t b e u s e df o r i n p u t ; a n y o f s e v e r a i n p u t d e v i c e s a n b e u s e d ,
l c
d e p e n d i n g n w h i c h S y s t e m / 3 m o d e l a n d c o n f i g u r a t i o ny o u h a v e .
o
l f y o u a r e a M o d e l 6 u s e r ,y o u w o u l d p r o b a b l y n o t u s e a c a r d f i l e f o r i n p u t , a l -
t h o u g h y o u m a y u s e a n o n l i n e d a t a r e c o r d e rf o r c a r d i n p u t . I n s t e a d ,y o u w o u l d
c r e a t es e q u e n t i a d i s k t r a n s a c t i o nf i l e s i n o n e o f t h e f o l l o w i n g w a y s :
l
o U s i n g t h e K e y b o a r d D a t a E n t r y c o n v e r s a t i o n au t i l i t y p r o g r a m ( s e eI B M
l
System/3 Model 6 Conversational lJtility Programs Reference Manual, SC21-75281
o U s i n ga n i n t e r a c t i v e P G l l , F O R T R A N , o r B A S I C p r o g r a mt o b u i l d t h e d i s k
R
f i l e f r o m k e y b o a r di n p u t
Page GC21-7566-1
of
lssued September
24 1976
By'TNL: GN21-5427
The disk transaction would then be usedto updatea disk master
file file in the
s a m e a y M F C Uf i l e sa r eu s e di n t h e e x a m p l eis t h i s m a n u a l .T h u s ,t h e M F c u
w n
f i l e si n t h e e x a m p l ec o u l db e r e p l a c e d y s e q u e n t i a li s kf i l e s . F o r e x a m p l e :
s b d
F i l e D e s c r i p t i o n S p e c i fi c a t i o n
D e p e n d i n go n t h e S y s t e m / 3 m o d e l a r r dt h e l / O d e v i c e s v a i l a b l e M F C U i n p u t f i l e s s h o w n
a ,
i n m o s t o f t h e e x a m p l e sc a n b e r e p l a c e db y 8 0 - c o l u m nc a r d f i l e s , c o n s o l ef i l e s ,t a p e f i l e s ,
5 4 4 5 d i s k f i l e s , o r o t h e r t y p e s o f i n p u t f i l e s . M o d e l s 1 0 , 1 2 , a n d 1 5 u s e r sc a n s u b s t i t u t e
DlSK45 (5445 disk) or DlSK40 (3340 disk) for the clevice ntry DISK (5444 disk) in the e
e x a m p l e s , e p e n d i n go n t h e e q u i p m e n t t h e y h a v e . M o d e l 6 u s e r ss h o u l d r e p l a c et h e d e v i c e
d
e n t r y P R I N T E R i n t h e e x a m p l e sw i t h t h e d e v i c ec n t r y T R A C T R l . a n d r e p l a c eB l o c l
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