z/OS V1R6.0 DFSMS Access Method Services for Catalogs

DELETEremoved has no data sets in the VVDS. If the catalog entry indicates thereare data sets in the VVDS, the VVDS’s VSAM volume control record(VVCR) is removed and the catalog entry for the VVDS is removed.If the volume is mounted and you specify NOSCRATCH for a VSAMvolume data set (VVDS), the catalog entry for the VVDS is removed, andthe catalog back pointer in the VSAM volume control record (VVCR) isremoved.You should specify NOSCRATCH for the following:vvvvvIf the format-1 DSCB of a non-VSAM data set has already beenscratched from the VTOC.If you are deleting a non-VSAM data set that was defined with a devicetype named by the user (for example, SYSDA) and the device type is notvalid.If the object is defined in a catalog and you want to recatalog the objectin the same catalog.After you convert a volume, the names of catalogs owning data sets onthe volume will still be in the VVCR. Only catalogs that reside on theconverted volume need to have their names in the VVCR. You canremove unneeded catalog names from the VVCR by using DELETEVVDS NOSCRATCH with the CATALOG parameter referencing thecatalog to be deleted from the VVCR. For coexistence, an error indicationis still returned if there are VVR or NVRs on the volume for thereferenced catalog.NOSCRATCH affects the DFSMShsm delete function interaction forVSAM base clusters and non-VSAM data sets. It causes the migrateddata set to be recalled because a migrated data set cannot beuncataloged.Abbreviation: NSCRDELETE ExamplesThe DELETE command can perform the following functions.Delete a Truename Entry in a Catalog: Example 1In this example, the truename entry for a data component of an alternate index isdeleted. The purpose of this example is to remove the truename of an entry whenan error has occurred, leaving the associated base record either inaccessible ormissing. Removing the name allows a subsequent DEFINE command to reuse thename without an error caused by a duplicate name situation.//DELET12 JOB ...//STEP1 EXEC PGM=IDCAMS//SYSPRINT DD SYSOUT=A//SYSIN DD *DELETE -K101.AIX.DATATRUENAME -CATALOG(USERCAT4)/*The DELETE command deletes a truename entry that exists without its associatedbase record. The parameters are:vK101.AIX.DATA is the entryname of the alternate index’s data component to bedeleted.Chapter 20. DELETE 227