At this point it is important to see how all of these macros work
together in a program. Figure 1 shows the
relationship between JCL and the VSAM macros in a program.
Figure 1. VSAM Macro Relationships
Figure 2 is a skeleton program that shows the relationship
of VSAM macros to each other and to the rest of the program.
Figure 2. Skeleton VSAM Program
START CSECT
SAVE(14,12) Standard entry code
.
B INIT Branch around file specs
MASACB ACB DDNAME=MASDS,AM=VSAM, File specs X
MACRF=(KEY,SEQ,OUT), X
EXLST=EXITS, X
RMODE31=ALL
MASRPL RPL ACB=MASACB, X
OPTCD=(KEY,SEQ,NUP,MVE,SYN), X
AREA=WA, X
AREALEN=80, X
RECLEN=80
EXITS EXLST LERAD=LOGER, X
JRNAD=JOURN
TRANDCB DCB DDNAME=TRANDS, X
DSORG=PS, X
MACRF=GM, X
EODAD=EOTRF, X
LRECL=80, X
BLKSIZE=80, X
RECFM=F
INIT . Program initialization
.
OPEN (MASACB,,TRANDCB) Connect data sets
.
GET TRANDCB,WA Processing loop
.
PUT RPL=MASRPL
.
EOTRF CLOSE (MASACB,,TRANDCB) Disconnect data sets
.
RETURN (14,12) Return to calling routine
LOGER Exit routines
.
JOURN .
.
WA DS CL80 Work area
END