Previous topic |
Next topic |
Contents |
Contact z/OS |
Library |
PDF
Generic Catalog Selection for DELETE and LISTCAT z/OS DFSMS Access Method Services Commands SC23-6846-01 |
|
The multilevel alias facility enhances generic catalog selection. If you use generic catalog selection with multilevel aliases, you can select several catalogs if the number of qualification levels of the generic name is less than the maximum your system allows. See z/OS DFSMS Managing Catalogs for information about setting multilevel alias levels in the catalog address space. If the number of qualification levels in the data set name is less than the maximum your system allows, and aliases exist that match the generic data set name, then every catalog related to those aliases (including the master catalog) is selected. The multilevel alias facility and
the system-generated name format require special attention, such as:
With the multilevel alias facility, a non-VSAM data set with the same high-level qualifier as an existing alias of a user catalog can be defined. For more details, see z/OS DFSMS Managing Catalogs. The selection order is based upon alias names encountered that match the generic data set name, not upon the catalogs or the data set names selected. For LISTCAT, therefore, entries appear in the data set within alias entry order. Should two or more aliases relate to the same catalog, only the first catalog reference is used. If no catalogs are found in the prior searches, the master catalog is searched. Examples: Given that,
The master catalog is not searched. |
Copyright IBM Corporation 1990, 2014
|