why sap implemented lock concept seperatly as db
locks(Oracle) are already there?
Answers were Sorted based on User's Feedback
Answer / rajesh chowdary pendyala
A "SAP lock" is named "enqueue lock", the enqueue is on a
much higher level, e. g. a complete sales document is locked
there whereas in the datbase usually only row locks exist.
Since SAP runs on more database than Oracle one needed to
have a mechanism, that is database independent and on a
higher level. sap locks can be viewed in sm12 and db locks
we can view in db01.
Is This Answer Correct ? | 7 Yes | 0 No |
Answer / dj
Sap lock= sm12 lock on table/s while bring updated or modified.
Dealock/enaueue lock/db lock = db01. lock from db level by enqueue wp, so multiple instances in a landscape cannot access the db at the same time.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / guest
i told them to maintain platform independency.as db locks
are specific to database.(oracle lock concept is diff then
maxdb).is there any other reason besides this.the
interviewer asked me?
Is This Answer Correct ? | 1 Yes | 2 No |
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