ravi sankar

• Jul 27th, 2006

 

 Lock objects are function modules to avoid accessing data by two or more users.

there r two types of lock objects are available, DEQUEE, ENQUEE

Arivazhagan

• Nov 16th, 2006

 

multiple users access same records synchronized by lock objects.

1. syncronize lock

2. asyncronize lock

Senthil Kumar

• Jan 19th, 2007

 

Type of locks:

Exclusive Lock: The locked data can be read or processed by one user only.

Shared Lock: Several users can read the same data at the same time, but as soon as a user edits the data, a second user can no longer access this data.

Exclusive but not cumulative lock: Exclusive locks can be requested by the same transaction more than once and handled successively, but an exclusive but not cumulative lock can only be requested once by a given transaction. All other lock requests are rejected.

sreelakshmi.sakam

 Profile Answers by sreelakshmi.sakam 

• May 23rd, 2011

 

locking an object means synchronizing the simultaneous access by several users on same data

types:
            readlock(shared lock)
            write lock(exclusive lock)

             enhanced write lock

sankaran.ramaiah

 Profile Answers by sankaran.ramaiah Questions by sankaran.ramaiah

• Jun 6th, 2011

 

hi
Lock Object: Using lock object we can lock the table .The purpose is before updating the standard table (adding new fields) we need to lock the table.

types: 1) Enque-to lock the table
           2)Deque - To release the table.(after updated)





Regards,
Sankaran

sreelakshmi.sakam

 Profile Answers by sreelakshmi.sakam 

• Jun 8th, 2011

 

lock objects are used to synchronize the access of same data by more than one user simultaneously

types
read lock
write lock
enhanced write lock