Subject Re: [firebird-support] 'IN' limit still applies?
Author Dimitry Sibiryakov
> am I right in thinking that if the select returns more that 1500
> values the statement will fail in some way
> I remember that this used to be an issue and I can't find any
> reference to it being removed

You are wrong and this limit never applied to subqueries, only to
list of values.