z/OS DFSMSdfp Utilities
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Example 6: Create and Update a Library Member

z/OS DFSMSdfp Utilities
SC23-6864-00

In this example, a member of a partitioned data set is created from sequential input and existing logical records are updated.
 
  //UPDATE   JOB  ...
  //STEP1    EXEC PGM=IEBUPDTE,PARM=MOD
  //SYSPRINT DD  SYSOUT=A
  //SYSUT1   DD  DSNAME=BROWN.OLDSEQDS,UNIT=tape,
  //             DISP=(OLD,KEEP),VOLUME=SER=001234
  //SYSUT2   DD  DSNAME=BROWN.NEWPART,UNIT=disk,DISP=(,CATLG),
  //             VOLUME=SER=111112,SPACE=(TRK,(10,5,5)),
  //             DCB=(RECFM=FB,LRECL=80,BLKSIZE=4080)
  //SYSIN    DD  *
  ./     CHANGE   NEW=PO,MEMBER=PARMEM1,LEVEL=01,
  ./             SEQFLD=605,COLUMN=40,SOURCE=0
 
  (Data statement 1, sequence number 00020)
 
  ./     DELETE   SEQ1=220,SEQ2=250
 
  (Data statement 2, sequence number 00230)
  (Data statement 3, sequence number 00260)
 
  ./      ALIAS   NAME=MEMB1
  /*
The control statements are as follows:
  • SYSUT1 DD defines the input sequential data set (BROWN.OLDSEQDS). The data set resides on a tape volume.
  • SYSUT2 DD defines the output partitioned data set (BROWN.NEWPART). Enough space is allocated to provide for members that may be added in the future.
  • SYSIN DD defines the control data set, which follows in the input stream.
  • The CHANGE function statement identifies the output member (PARMEM1) and indicates that a conversion from sequential input to partitioned output is made. The SEQFLD parameter indicates that a 5-byte sequence number is located in columns 60 through 64 of each data statement. The COLUMN=40 parameter specifies the starting column of a field (within subsequent data statements) from which replacement information is obtained. SOURCE=0 indicates that the replacement information is provided by you.
  • The first data statement is used as replacement data. Columns 40 through 80 of the statement replace columns 40 through 80 of the corresponding logical record. If no such logical record exists, the entire card image is inserted in the output data set member.
  • The DELETE detail statement deletes all of the logical records having sequence numbers from 220 through 250.
  • The second data statement, whose sequence number falls within the range specified in the DELETE detail statement is incorporated in its entirety in the output data set member.
  • The third data statement, which is beyond the range of the DELETE detail statement, is treated in the same manner as the first data statement.
  • ALIAS assigns the alias name MEMB1 to the output data set member PARMEM1.

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