Method and apparatus for accessing database and database application system

An apparatus for accessing a database, comprising:

• a receiving module configured to receive a modification operation request for shared data in the database that is mapped into a process address space;
• a decomposing module configured to decompose the modification operation request to a preset number of atomic operation sequences;
• an invoking module configured to invoke atomic operation interfaces according to an execution order of the various atomic operation sequences;
• and
• an atomic access module configured to access the shared data in the database, which is mapped into the process address space, through atomic operations provided by the atomic operation interfaces.

A non-transitory computer readable storage medium including a computer program for accessing a database, the computer program is configured to:

• receive a modification operation request for shared data in he database that is mapped into a process address space;
• decompose the modification operation request to a preset number of atomic operation sequences;
• invoke atomic operation interfaces according to an execution order of various atomic operation sequences;
• and
• access the shared data in the database which is mapped into the process address space through atomic operations provided by the atomic operation interfaces.