Hierarchy
SAP_BASIS (Software Component) SAP Basis Component⤷
BC-DWB-DIC-AC (Application Component) Activation Program, Conversion Program, DB Utility, MC, SPDD⤷
SMAC (Package) R/3 Matchcode Development
Basic Data
| Data Element | ENQMODE |
| Short Description | Lock mode |
Data Type
| Category of Dictionary Type | D | Domain |
| Type of Object Referenced | No Information | |
| Domain / Name of Reference Type | ENQMODE | |
| Data Type | CHAR | Character String |
| Length | 1 | |
| Decimal Places | 0 | |
| Output Length | 1 | |
| Value Table |
Further Characteristics
| Search Help: Name | ||
| Search Help: Parameters | ||
| Parameter ID | ||
| Default Component name | ||
| Change document | ||
| No Input History | ||
| Basic direction is set to LTR | ||
| No BIDI Filtering |
Field Label
| Length | Field Label | |
| Short | 10 | Lock mode |
| Medium | 15 | Lock mode |
| Long | 20 | Lock mode |
| Heading | 3 | LM |
Documentation
Definition
Defines how the access of several users to records in the table will be synchronized.
The following modes are possible:
Exclusive Locks
The locked data can be displayed or edited by one user only. Requests for either another exclusive lock or a shared lock are rejected.
Shared Lock
Several users have simultaneous read access to the same data. However, as soon as any one user processes the data, a second user does not have any access to this data. Requests from further shared locks are accepted, even if they are from different users. Exclusive locks are rejected.
Exclusive but not cumulative lock
Whereas exclusive locks can be requested several times by the same transaction and released one by one, an exclusive, non-cumulative lock can only be requested once by the same transaction. Each further lock request will be rejected.
Optimistic Lock (O):
Optimistic locks initially behave like shared locks and can be converted into exclusive locks.
Promote Optimistic Lock (R):
Converts an optimistic lock into an exclusive lock.
Collision check / Promotion check ('U', 'V', 'W', 'C')
Checks whether one of the respective locks ('E', 'S', 'X', 'O') is possible, but does not set a lock
History
| Last changed by/on | SAP | 20110908 |
| SAP Release Created in |
