DISPLAY CHANNEL (MQTT)

filter-keyword

Almost any parameter that can be used to display attributes for this DISPLAY command. However, you cannot use the CMDSCOPE, QSGDISP, or MCANAME parameters as filter keywords. You 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, you 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, you 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, you 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, you 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), you 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. Only a single trailing wildcard character (asterisk) is permitted.

  You 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.

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.

CHLTYPE(type) can be used as a synonym for this parameter.