SAP ABAP Data Element APQ_QATT (Queue attribute (unique or append)) is used by

• Function Module (4)
• Table (2)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	DEQUEUE_BDC_QID VALUE(QATTRIB) TYPE APQI-QATTRIB OPTIONAL	Release lock on object BDC_QID
2	Function Module	ENQUEUE_BDC_QID VALUE(QATTRIB) TYPE APQI-QATTRIB OPTIONAL	Request lock for object BDC_QID
3	Function Module	QUEUE_OPEN VALUE(TYPE) LIKE APQI-QATTRIB DEFAULT 'A'	Open / create a queue	SQIO	BASIS	SAP_BASIS
4	Function Module	QUEUE_OPEN VALUE(TYPE) LIKE APQI-QATTRIB	Open / create a queue	SQIO	BASIS	SAP_BASIS