DELETE CHANNEL (delete a channel)

Using MQSC commands

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

Usage notes

• Successful completion of the command does not mean that the action completed. To check for true completion, see the DELETE CHANNEL step in Checking that async commands for distributed networks have finished.
• On z/OS systems, the command fails if the channel initiator and command server have not been started, or the channel status is RUNNING, except client-connection channels, which can be deleted without the channel initiator or command server running.
• On z/OS systems, you can only delete cluster-sender channels that have been created manually.

Parameter descriptions

(channel-name)

The name of the channel definition to be deleted. This is required. The name must be that of an existing channel.

CHLTABLE

Specifies the channel definition table that contains the channel to be deleted. This is optional.

QMGRTBL

The channel table is that associated with the target queue manager. This table does not contain any channels of type CLNTCONN. This is the default.

CLNTTBL

The channel table for CLNTCONN channels. On z/OS, this is associated with the target queue manager, but separate from the main channel table. On all other platforms, this channel table is normally associated with a queue manager, but can be a system-wide, queue manager independent channel table if you set up a number of environment variables. For more information about setting up environment variables, see Using IBM® MQ environment variables.

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. This is the default value.

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 the command was entered, only if you are using a queue sharing group 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 this is the same as entering the command on every queue manager in the queue sharing group.

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).

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 delete local copies on page set zero:

DELETE CHANNEL(channel-name) QSGDISP(COPY)

The deletion of the group object takes effect even if the generated command with QSGDISP(COPY) fails.

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.

This is the default value.

IGNSTATE

This parameter allows you to specify whether you want the command to return an error code if the object is already in the state the command moves it to.

A value of YES means the return code and message are the same as if the MQSC object has not been deleted.

A value of NO means that the return code is zero, even if the object has been deleted. This is the default value.

Note that, when running in runmqsc -n mode, that is, not connected to a queue manager, the DELETE CHANNEL command accepts the IGNSTATE parameter, but there is no difference in behavior between YES and NO options. If runmqsc is run normally, DELETE CHANNEL acts like other objects.