Lock Objects

[#1]

Is creating Lock objects,admin job or ABAPer job?

What is the ABAPer work regarding Lock objects?

Can ABAPer use the ENQUEUE and DEQUEUE function modules for locking and unlocking?

[Former Member]

Hi Lalitha.

Answer 1: Locking can be done by an ABAP consultant.

Answer 2: An ABAP programmer has to follows important strategies:

1. Setting of Lock mode:

Status that determines whether a user has exclusive access to an object, or whether access is shared with other users.

The lock mode (either "Shared" or "Exclusive") is assigned to the tables of a lock object on definition.

2. Activation of lock object (Calling Function Modules):

Use of various function modules (ENQUEUE and DEQUEUE) to facilitate the locking and unlocking mechanisms.

I would like to show you some code where you can understand some basic locking and releasing mechanism for HR Infotype modifications :

tables:
  pa0001.

data:
  t_pa0001 like table of pa0001.

data:
  fs_pa0001 like p0001.

parameters:
  p_pernr like pa0001-pernr.

select single *
from pa0001
into  corresponding fields of fs_pa0001
where pernr = p_pernr.


fs_pa0001-gsber = '1000'.
fs_pa0001-infty = '0001'.


call function 'BAPI_EMPLOYEE_ENQUEUE'
  exporting
    number = p_pernr.

call function 'HR_INFOTYPE_OPERATION'
  exporting
    infty                  = '0001'
    number                 = p_pernr
*   SUBTYPE                =
*   OBJECTID               =
*   LOCKINDICATOR          =
   validityend            = '99991231'
   validitybegin          = '20080628'
*   RECORDNUMBER           =
    record                 = fs_pa0001
    operation              = 'MOD'
*   TCLAS                  = 'A'
*   DIALOG_MODE            = '0'
*   NOCOMMIT               =
*   VIEW_IDENTIFIER        =
*   SECONDARY_RECORD       =
* IMPORTING
*   return                 = return
*   KEY                    =
          .
          call function 'BAPI_TRANSACTION_COMMIT'
*           EXPORTING
*             WAIT          =
*           IMPORTING
*             RETURN        =
                    .


call function 'BAPI_EMPLOYEE_DEQUEUE'
  exporting
    number = p_pernr.

Reward Points if you find this information usefull.

Regards

Harsh