ALTER NAMELIST (alter a list of names)

Use the MQSC command ALTER NAMELIST to alter a list of names. This list is most commonly a list of cluster names or queue names.

Using MQSC commands

For information on how you use MQSC commands, see Performing local administration tasks using MQSC commands.

Parameters not specified in the ALTER NAMELIST command result in the existing values for those parameters being left unchanged.

[z/OS] You can issue this command from sources 2CR. For an explanation of the source symbols, see Sources from which you can issue MQSC commands on z/OS®.

Syntax diagram
Usage notes
Parameter descriptions for ALTER NAMELIST

Synonym: ALT NL

ALTER NAMELIST

Notes:

¹ Valid only on z/OS when the queue manager is a member of a queue sharing group.
² Valid only on z/OS.

Usage notes

Successful completion of the command does not mean that the action completed. To check for true completion, see the ALTER NAMELIST step in Checking that async commands for distributed networks have finished.

Parameter descriptions for ALTER NAMELIST

(name)

Name of the list.

The name must not be the same as any other namelist name currently defined on this queue manager (unless REPLACE or ALTER is specified). See Rules for naming IBM® MQ objects.

CMDSCOPE

This parameter applies to z/OS only and specifies how the command runs when the queue manager is a member of a queue sharing group.

CMDSCOPE must be blank, or the local queue manager, if QSGDISP is set to GROUP.

' ': The command runs on the queue manager on which it was entered.
qmgr-name: The command runs on the queue manager you specify, providing the queue manager is active within the queue sharing group.
You can specify a queue manager name other than the queue manager on which it was entered, only if you are using a shared queue environment and if the command server is enabled.
*: The command runs on the local queue manager and is also passed to every active queue manager in the queue sharing group. The effect of specifying * is the same as entering the command on every queue manager in the queue sharing group.

DESCR(string)

Plain-text comment. It provides descriptive information about the namelist when an operator issues the DISPLAY NAMELIST command (see DISPLAY NAMELIST (display a list of names) ).

It must contain only displayable characters. The maximum length is 64 characters. In a DBCS installation, it can contain DBCS characters (subject to a maximum length of 64 bytes).

Note: If characters are used that are not in the coded character set identifier (CCSID) for this queue manager, they might be translated incorrectly if the information is sent to another queue manager.

NAMES(name, ...)

List of names.

The names can be of any type, but must conform to the rules for naming IBM MQ objects, with a maximum length of 48 characters.

An empty list is valid: specify NAMES(). The maximum number of names in the list is 256.

NLTYPE

Indicates the type of names in the namelist.

This parameter is valid only on z/OS.

NONE: The names are of no particular type.
QUEUE or Q: A namelist that holds a list of queue names.
CLUSTER: A namelist that is associated with clustering, containing a list of the cluster names.
AUTHINFO: This namelist is associated with TLS and contains a list of authentication information object names.

Namelists used for clustering must have NLTYPE(CLUSTER) or NLTYPE(NONE).

Namelists used for TLS must have NLTYPE(AUTHINFO).

QSGDISP

This parameter applies to z/OS only.

Specifies the disposition of the object to which you are applying the command (that is, where it is defined and how it behaves).

Table 1. Behavior for each of the QSGDISP values
QSGDISP	ALTER
COPY	The object definition resides on the page set of the queue manager that executes the command. The object was defined using a command that had the parameters QSGDISP(COPY). Any object residing in the shared repository, or any object defined using a command that had the parameters QSGDISP(QMGR), is not affected by this command.
GROUP	The object definition resides in the shared repository. The object was defined using a command that had the parameters QSGDISP(GROUP). Any object residing on the page set of the queue manager that executes the command (except a local copy of the object) is not affected by this command. If the command is successful, the following command is generated and sent to all active queue managers in the queue sharing group to attempt to refresh local copies on page set zero: `DEFINE NAMELIST(name) REPLACE QSGDISP(COPY)` The ALTER for the group object takes effect regardless of whether the generated command with QSGDISP(COPY) fails.
PRIVATE	The object resides on the page set of the queue manager that executes the command, and was defined with QSGDISP(QMGR) or QSGDISP(COPY). Any object residing in the shared repository is unaffected.
QMGR	The object definition resides on the page set of the queue manager that executes the command. The object was defined using a command that had the parameters QSGDISP(QMGR). Any object residing in the shared repository, or any local copy of such an object, is not affected by this command.