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ABAP Keyword Documentation → ABAP Glossary →update function module
Function module for which the property update module is selected in the Function Builder. It is the basis of the update. Generally, an update function module contains changing database accesses and, with the statement CALL FUNCTION ... IN UPDATE TASK, can be registered to later execute the statement COMMIT WORK. When an update function module is created it is assigned either a high or low priority level.