> > >The problem is that the "IN" clause has a limitation of 1500 items.
> Thanks for the hint about inserting values in a table but for
> specific reasons we cannot do that.
>
> Since now servers are very fast, what about removing this
> limitation ? Is it so dangerous ?

Even if this limit will be removed, you will soon encounter
limits on sql command size or blr code size.

(And it reminds me that this type of query can easily be done
in my fulltext engine :-)

Ivan