ABCs of z/OS System Programming Volume 3 - IBM Redbooks

Note: When you delete a data set, the BCS, VVDS, and VTOC entries for the data set are
removed. If you later recover a BCS, there can be BCS entries for data sets which have
been deleted. In this case, the data sets do not exist, and there are no entries for them in
the VVDS or VTOC. To clean up the BCS, delete the BCS entries.
Delete aliases
To simply delete an alias, use the IDCAMS DELETE ALIAS command, specifying the alias you
are deleting. To delete all the aliases for a catalog, use EXPORT DISCONNECT to disconnect the
catalog. The aliases are deleted when the catalog is disconnected. When you again connect
the catalog (using IMPORT CONNECT), the aliases remain deleted.
Delete the catalog entry
To only delete a catalog entry, you can use the DELETE NOSCRATCH command; the VVDS and
VTOC entries are not deleted. The entry deleted can be reinstated with the DEFINE
RECATALOG command, as shown in Figure 6-19.
//DELDS JOB ...
//STEP1 EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=A
//SYSIN DD *
DELETE TEST1.A NOSCRATCH /* deletes TEST1.A from the BCS */
DEFINE NONVSAM - /* redefines TEST1.A into the BCS */
(NAME(TEST1.A) -
DEVICETYPE(3390)-
VOLUMES(VSF6S3) -
RECATALOG -
)
/*
Figure 6-19 Delete NOSCRATCH, define RECATALOG
Delete VVR or NVR records
When the catalog entry is missing, and the data set remains on the DASD, you can use the
DELETE VVR for VSAM data sets and DELETE NVR for non-VSAM SMS-managed data sets to
remove its entry from the VVDS. You can only use these commands if there is no entry in the
BCS for the data set.
//DELDS JOB ...
//S1 EXEC PGM=IDCAMS
//SYSPRINT DD SYSOUT=*
//DD1 DD VOL=SER=VSF6S3,UNIT=3390,DISP=OLD
//SYSIN DD *
DELETE TEST1.A -
FILE(DD1) -
NVR
/*
Figure 6-20 Delete the VVDS entry for a non-VSAM data set
Important: When deleting VSAM KSDS, you must issue a DELETE VVR for each of the
components, the DATA, and the INDEX.
348 ABCs of z/OS System Programming Volume 3