SAP ABAP Table VSYNC (Control Table for Distribution Program Running Parallel) is used by

• ENQU (1)
• Function Module (7)
• Program (3)

#	Object Type	Object Name	Object Description	Package	Structure Package	Software Component
1	Function Module	DD_MASS_DIST	DD_MASS_DIST	SDIC	BASIS	SAP_BASIS
2	Function Module	DEQUEUE_ES_VSYNC VALUE(LAST) LIKE VSYNC-LAST OPTIONAL	Release lock on object ES_VSYNC
3	Function Module	DEQUEUE_ES_VSYNC VALUE(FIRST) LIKE VSYNC-FIRST OPTIONAL	Release lock on object ES_VSYNC
4	Function Module	DEQUEUE_ES_VSYNC VALUE(CLASS) LIKE VSYNC-CLASS OPTIONAL	Release lock on object ES_VSYNC
5	Function Module	ENQUEUE_ES_VSYNC VALUE(FIRST) LIKE VSYNC-FIRST OPTIONAL	Request lock for object ES_VSYNC
6	Function Module	ENQUEUE_ES_VSYNC VALUE(LAST) LIKE VSYNC-LAST OPTIONAL	Request lock for object ES_VSYNC
7	Function Module	ENQUEUE_ES_VSYNC VALUE(CLASS) LIKE VSYNC-CLASS OPTIONAL	Request lock for object ES_VSYNC