RE: lock modes

In answer to the original question:

Exclusive: means that the table in question is locked by a user exclusively. This is usually used as shown below by Ep, to stop other users *modifying* the data within the table (they can still select).

Row Exclusive: You can specify an init parameter ROW_LOCKING, this will force a lock to be applied each time a row is updated.

None: Means what it says on the tin:) There are no locks applied.

HTH Mark

-----Original Message-----
Pierce
Sent: Thursday, April 12, 2001 07:06
To: Multiple recipients of list ORACLE-L

Partial answer only:

See below for a code example (something I use to irritate users if run during normal data enty times!).

It shows how how to lock a table for "mass update" while running in SQL*plus (amazing enough, it was probably originally found in an Oracle manual).

Regards,
Eric

---begin---

    whenever sqlerror exit sql.code ;
    lock table STUDENT_MASTER in exclusive mode nowait ;     whenever sqlerror continue ;

---end---

On 12 Apr 2001, at 9:26, Bunyamin K.Karadeniz wrote:

Date sent:              Thu, 12 Apr 2001 09:26:40 -0800
To:                     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>

> Can anyone explain the lock modes written below.What do they mean . And
how will I open the lock?
> Regards
>
> Exclusive
> Row Excl.
> None

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Author: Mark Leith
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