RE: SQL Question On Record Locks

["Wilt, Charles" <CWilt@xxxxxxxxxxxx>]

In addition....

Check out the section on commitment control in chapter 19 of the SQL 
Programming Concepts manual.

There is a table that shows "Row Lock Duration" (page 313 v5r2).


HTH,

Charles Wilt
iSeries Systems Administrator / Developer
Mitsubishi Electric Automotive America
ph: 513-573-4343
fax: 513-398-1121
 

> -----Original Message-----
> From: rpg400-l-bounces@xxxxxxxxxxxx
> [mailto:rpg400-l-bounces@xxxxxxxxxxxx]On Behalf Of RPower@xxxxxxxxxx
> Sent: Tuesday, May 17, 2005 2:32 PM
> To: RPG programming on the AS400 / iSeries
> Subject: SQL Question On Record Locks
> 
> 
> Ok guys.  This debate started here since we are taking an SQL 
> training 
> class.
> It concerns how SQL handles record locking.  If we use SELECT 
> * FROM TABLE 
> FOR UPDATE and the result set returns 100 records all of 
> name="RON" and I 
> want them updated to name="PAT".  If a user goes to look at 
> one of those 
> records, at what point are the records updated, locked, etc?  
> Will the 
> user see RON or PAT during the processing?  Does SQL lock one 
> record at a 
> time, or the whole 100?  Thanks,
> 
> Ron Power
> Programmer
> Information Services
> City Of St. John's, NL
> P.O. Box 908
> St. John's, NL
> A1C 5M2
> Tel: 709-576-8132
> Email: rpower@xxxxxxxxxx
> Website: http://www.stjohns.ca/
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