Re: Stored Procedures

[thomas@xxxxxxxxxxx]

On Fri, 15 June 2001, "Rodriguez, Jose Amable" wrote:

> 
> I've got a simple question.  I'd like to be able to code a stored procudrure
> in SQL that creates a temporary table.  The idea is that I need a unique
> number to add to the end of the table name (e.g. TEMP12345).  This way if
> two instances of the stored procedure are running, they don't bump into one
> another. 
> 
> Does anyone know of a random function or of a way to access a unique number
> within the stored procedure for this purpose?
> 

Jose:

I would use a single table if at all reasonable and generate a unique key 
instead of a unique table. An excellent unique generator is the __GENUUID MI 
builtin. Basic definition and usage is below. It generates a 16-byte "universal 
unique identifier" that is practically guaranteed unique across all systems. I 
use it to set client keys for keyed *dtaqs so the client can recognize entries 
coming back from the *dtaq server.

Example:

D  NewUUID                      16a
                                          
D UUID_template   Ds                             
D  BytesPrv                     10u 0 Inz( %Size( UUID_template ))   
D  BytesAvl                     10u 0            
D                                8a   Inz( *Allx'00' )
D  UUID                         16a                                             
    
D GenUuid         PR                  ExtProc('_GENUUID')
D  UUID_template                  *   Value                                     
            
 *
 *  Generate the unique identifier, return the value and terminate...
 *             
C                   Callp     GenUuid( %Addr( UUID_template )
c                                    )                                      
C                   eval      NewUUID = UUID

Simple to use and as reliable as almost anyone ever needs.

Tom Liotta

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