Subject Re: [firebird-support] Generators
Author Woody (TMW)
> Why a generator doesn't respect transactions?
>
> select gen_id(gen1, 1) from table1;
> 1
> select gen_id(gen1, 1) from table1;
> 2
> select gen_id(gen1, 1) from table1;
> 3
> ROLLBACK;
> select gen_id(gen1, 1) from table1;
> 4
> select gen_id(gen1, 1) from table1;
> 5
>
> Doesn't have to be a 1 instead of a 4?
> I'm thinking about producing the unique value for a primary key with
"select
> max(...) + 1 from..."... i know it's not a good idea for eficiency... but
it
> works, not?

Generators are transaction independent. They provide unique numbers for a
reason. If you need an audible set of numbers, then search for some
algorithms and ideas. There are papers written about them.

Woody (TMW)
Freeware Page: http://users.eonet.net/woodytmw

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