Re: Index on substring?

Jeff Eckermann schrieb:
>
> Tom,
> Thanks very much for your full and clear answer.
> It's hard to imagine a general use for this facility, anyway.
> For me this is a one-off exercise, albeit a big one.
> Regards
>

 There're commercial OO persistance frameworks out there, which create
there own OID's (actually they consists out of three numbers) all these
numbers are converted to base 36 and concatenated to a string with size
15.

 One part of this string is a class number of the instance you
have just loaded. Therefore if you look for instances of a
special class you may query a substring of this OID ....


 Just as an practical usage ....


Marten