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GroupId (MQBYTE24)

This is the group identifier to be used for the message sent to the queue whose name was specified by the corresponding element in the array of MQOR structures provided on the MQOPEN or MQPUT1 call. It is processed in the same way as the GroupId field in MQMD for a put to a single queue.

If this field is not present in the MQPMR record, or there are fewer MQPMR records than destinations, the value in MQMD is used for those destinations that do not have an MQPMR record containing a GroupId field. The value is processed as documented in Table 53, but with the following differences:

• In those cases where a new group identifier would be used, the queue manager generates a different group identifier for each destination (that is, no two destinations have the same group identifier).

• In those cases where the value in the field would be used, the call fails with reason code MQRC_GROUP_ID_ERROR.

This is an input/output field.

 

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