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Parameter descriptions

 

You must specify the name of the channel definition you want to display. This can be a specific channel name or a generic channel name. By using a generic channel name, we can display either:

(generic-channel-name)

The name of the channel definition to be displayed (see Rules for naming WebSphere MQ objects). A trailing asterisk (*) matches all channel definitions with the specified stem followed by zero or more characters. An asterisk (*) on its own specifies all channel definitions.

WHERE

Specify a filter condition to display only those channels that satisfy the selection criterion of the filter condition. The filter condition is in three parts: filter-keyword, operator, and filter-value:

filter-keyword

Almost any parameter that can be used to display attributes for this DISPLAY command. However, we cannot use the CMDSCOPE, QSGDISP, or MCANAME parameters as filter keywords. We cannot use TYPE (or CHLTYPE) if it is also used to select channels. Channels of a type for which the filter keyword is not a valid attribute are not displayed.

operator

This is used to determine whether a channel satisfies the filter value on the given filter keyword. The operators are:

LT

Less than

GT

Greater than

EQ

Equal to

NE

Not equal to

LE

Less than or equal to

GE

Greater than or equal to

LK

Matches a generic string that you provide as a filter-value

NL

Does not match a generic string that you provide as a filter-value

CT

Contains a specified item. If the filter-keyword is a list, we can use this to display objects the attributes of which contain the specified item.

EX

Does not contain a specified item. If the filter-keyword is a list, we can use this to display objects the attributes of which do not contain the specified item.

CTG

Contains an item which matches a generic string that you provide as a filter-value. If the filter-keyword is a list, we can use this to display objects the attributes of which match the generic string.

EXG

Does not contain any item which matches a generic string that you provide as a filter-value. If thefilter-keyword is a list, we can use this to display objects the attributes of which do not match the generic string.

filter-value

The value that the attribute value must be tested against using the operator. Depending on the filter-keyword, this can be:

  • An explicit value, that is a valid value for the attribute being tested.

    You can use operators LT, GT, EQ, NE, LE or GE only. However, if the attribute value is one from a possible set of values on a parameter (for example, the value SDR on the TYPE parameter), we can only use EQ or NE.

  • A generic value. This is a character string (such as the character string you supply for the DESCR parameter) with an asterisk at the end, for example ABC*. The characters must be valid for the attribute you are testing. If the operator is LK, all items where the attribute value begins with the string (ABC in the example) are listed. If the operator is NL, all items where the attribute value does not begin with the string are listed.

    We cannot use a generic filter-value for parameters with numeric values or with one of a set of values.

  • An item in a list of values. The value can be explicit or, if it is a character value, it can be explicit or generic. If it is explicit, use CT or EX as the operator. For example, if the value DEF is specified with the operator CT, all items where one of the attribute values is DEF are listed. If it is generic, use CTG or EXG as the operator. If ABC* is specified with the operator CTG, all items where one of the attribute values begins with ABC are listed.

ALL

Specify this to display all the parameters. If this parameter is specified, any parameters that are also requested specifically have no effect; all parameters are still displayed.

On AIX, HP OpenVMS, HP-UX, i5/OS, Linux, Solaris, Windows, and z/OS, this is the default if you do not specify a generic name and do not request any specific parameters.

On z/OS this is also the default if you specify a filter condition using the WHERE parameter, but on other platforms only requested attributes are displayed.

If no parameters are specified (and the ALL parameter is not specified or defaulted), the default is that the channel names only are displayed. On z/OS, the CHLTYPE and QSGDISP values are also displayed.

CMDSCOPE

This parameter specifies how the command is executed when the queue manager is a member of a queue-sharing group.

‘ ’

The command is executed on the queue manager on which it was entered. This is the default value.

qmgr-name

The command is executed on the queue manager you specify, providing the queue manager is active within the queue-sharing group.

We 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 is executed 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

Specifies the disposition of the objects for which information is to be displayed. Values are:

LIVE

This is the default value and displays information for objects defined with QSGDISP(QMGR) or QSGDISP(COPY).

ALL

Displays information for objects defined with QSGDISP(QMGR) or QSGDISP(COPY).

If there is a shared queue manager environment, and the command is being executed on the queue manager where it was issued, this option also displays information for objects defined with QSGDISP(GROUP).

If QSGDISP(ALL) is specified in a shared queue manager environment, the command might give duplicated names (with different dispositions) .

In the QSGDISP(LIVE) case, this occurs only where a shared and a non-shared queue have the same name; such a situation should not occur in a well-managed system.

In a shared queue manager environment, use 

   DISPLAY CHANNEL(name) CMDSCOPE(*) QSGDISP(ALL)
to list ALL objects matching 
name
in the queue-sharing group without duplicating those in the shared repository.

COPY

Display information only for objects defined with QSGDISP(COPY).

GROUP

Display information only for objects defined with QSGDISP(GROUP). This is allowed only if there is a shared queue manager environment.

PRIVATE

Display information only for objects defined with QSGDISP(QMGR) or QSGDISP(COPY). Note that QSGDISP(PRIVATE) displays the same information as QSGDISP(LIVE).

QMGR

Display information only for objects defined with QSGDISP(QMGR).

QSGDISP displays one of the following values:

QMGR

The object was defined with QSGDISP(QMGR).

GROUP

The object was defined with QSGDISP(GROUP).

COPY

The object was defined with QSGDISP(COPY).

We cannot use QSGDISP as a filter keyword.

TYPE

This is optional. It can be used to restrict the display to channels of one type.

The value is one of the following:

ALL

Channels of all types are displayed (this is the default).

SDR

Sender channels only are displayed.

SVR

Server channels only are displayed.

RCVR

Receiver channels only are displayed.

RQSTR

Requester channels only are displayed.

CLNTCONN

Client-connection channels only are displayed.

SVRCONN

Server-connection channels only are displayed.

CLUSSDR

Cluster-sender channels only are displayed (valid on AIX, HP OpenVMS, HP-UX, Linux, i5/OS, Solaris, Windows, and z/OS only).

CLUSRCVR

Cluster-receiver channels only are displayed (valid on AIX, HP OpenVMS, HP-UX, Linux, i5/OS, Solaris, Windows, and z/OS only).

On AIX, HP OpenVMS, HP-UX, Linux, i5/OS, Solaris, and Windows, CHLTYPE(type) can be used as a synonym for this parameter.

 

Parent topic:

DISPLAY CHANNEL


sc11780_


 

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