Re: equivalent of lock and update in SQL

The equivalent SQL would be to declare an update-able cursor with
appropriate
isolation, fetch the record using it then do an UPDATE WHERE CURRENT OF
CURSOR <...> then commit...

Only other option would be to do a LOCK TABLE prior to the SELECT INTO and
UPDATE..

Personally, I'd consider using SQL identity or sequence columns...

Otherwise, just use your RPG as a UDF or SP.

Charles



On Wed, Mar 20, 2013 at 2:30 PM, Steve Richter <stephenrichter@xxxxxxxxx

wrote:

in rpg record I/O I lock a control record, increment a control number,

then

update the control record. Which reliably gives me a unique value.

C** GET NEXT SID NUMBER FROM WCMAST
C inwacd CHAIN WCREC
C EVAL WCNSID += 1
C UPDATE WCREC
/free
outSid = wcnsid ;
/end-free

Can I use SQL to do the same thing?

thanks,
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