> >
> > Does anybody knows if the FB has anything like:
> >
> > declare variable command varchar(1000);
> > select 'select * from TABLE' from RDB$DATABASE into :command;
> > execute(command);
>

Um, that is a very round about way of achieving

command = 'select * from table';

but anyway, once you have set the value into command, you can use it
inside a for select do construct. Check the FB 1.5(.0) release notes.
It has an example of how to achieve this.

If you are using a stored procedure, and you want to do it this way,
you could simply do a test

if (:User = -1) then
begin
command = :command || ' where User = ' || :User;
end

etc

But I don't think the plan can be stored for dynamicly created queries
like this, which may or may not be an issue.

Adam