How to update database in update task

Question

Hi everyone,
  I have a question: I need to update database in a SAP LUW. And I develop a method in my class
to update the database.how can I update database in SAP LUW.

Answer 1

Use can use "COMMIT WORK " and Database operate command SQL
Within an LUW, database changes are not made until after a database commit. Prior to this, any database change can be canceled by a database rollback.
In the R/3 System, a database commit is triggered either automatically or by the ABAP/4 command COMMIT WORK or the appropriate Native SQL command for the database system.
Similarly, a database rollback is triggered either automatically or by the ABAP/4 command ROLLBACK WORK or the appropriate Native SQL command for the database system.
After the COMMIT WORK has been executed, the event RAISE_TRANSACTION_FINISHED of the class CL_SYSTEM_TRANSACTION_STATE with parameter value CL_SYSTEM_TRANSACTION_STATE=>COMMIT_WORK is triggered. However, this does not apply to the COMMIT WORK at the end of the update.
Edited by: Jack Wu on Dec 16, 2008 11:13 AM