Lock entries standard table

Question

Hi Experts,
Please help in finding which SAP Standard table can we find the lock entries(SM12 transaction).
Thanks!

Answer 1

Prerequisites
You have generated the demo data for the SQL Tutorial.
Log on to the database instance DEMODB as user MONA.
Examples
You can use the system table LOCKS to determine the following database information, among other things:
●     All locks that are currently held on table ROOM
SELECT lockmode, lockstate, rowidlength, rowidhex, rowid
  FROM DOMAIN.LOCKS
    WHERE tablename = 'ROOM'
●     All locks that the current user holds in that database session on table ROOM
SELECT lockmode, lockstate, rowidlength, rowidhex, rowid
  FROM DOMAIN.LOCKS, SYSINFO.SESSIONS
    WHERE tablename = 'ROOM'
      AND locks.session = sessions.sessionid
●     All locks that are currently held on the table with the hexadecimal internal identification 000000000000035D
SELECT lockmode, lockstate, rowidlength, rowidhex, rowid
  FROM DOMAIN.LOCKS
    WHERE tableid = X'000000000000035D'
If the current user is the database administrator (DBA user) or the database system administrator (SYSDBA user), then all currently held locks are shown.
Users that belong to other user classes only see the locks held by that one user.
Definition
The system table LOCKS describes the current lock entries and entries for lock requests.
Structure
LOCKS
SESSION
FIXED(10)
ID of the database session
TRANSCOUNT
CHAR(20)
Transaction identification in the database session
PROCESS
FIXED(10)
Process identification in the database instance
USERNAME
CHAR(32)
Name of the user
DATE
DATE(10)
Creation date of the lock
TIME
TIME(8)
Creation time of the lock
TERMID
CHAR(18)
User terminal identification
LASTWRITE
CHAR(10)
Elapsed time since the last SQL statement for data manipulation
LOCKMODE
CHAR(14)
Type of lock (NULL value | SHARE | EXCLUSIVE)
LOCKSTATE
CHAR(10)
Status of lock
APPLPROCESS
FIXED(10)
Process identification on the client hardware
APPLNODE
CHAR(64)
Client hardware identification
SCHEMANAME
CHAR(32)
Name of the schema of the table
OWNER
CHAR(32)
Name of the owner of the table
TABLENAME
CHAR(32)
Name of the table
TABLEID
CHAR(8) BYTE
ID of the table
ROWIDLENGTH
FIXED(4)
Length of the key of the locked row
ROWIDHEX
CHAR(64) BYTE
Start of the key of the locked row in hexadecimal notation
ROWID
CHAR(128)
Start of the key of the locked row
http://dev.mysql.com/doc/maxdb/en/c4/812640632cec01e10000000a155106/content.htm