Hi Moises,

Here is a thread on the same topic Re: ID field Thread #1170010 Message #1170230 (read the whole thread).

It was not my particular problem to solve, but I passed some of the ideas to the person who was working on the problem and I think he ended with FLOCK() solution...

>In my applications that are already running for long time
>and would be hard to modify, I am considering to use the code below
>
>A random number would be added to the code to prevent duplications
>
>Do you think 1 in 10,000 is good a range to prevent duplications ?
>
>**************************************
>add_code = Int(10000*Rand())
>
>dimension lctemp[1]
>select max(ap.id2) from ap ;
> into array lctemp
> lcTemp[1] = nvl(lcTemp[1],0)+1 + add_code
>replace ap.id2 with lctemp
>
>*********************************************