Peter,
just an idea to use placeholders (?) in psql.
It would be useful for interactive work and debuging.
We already have powerful features in psql but sometimes
we need more. If user enter select string with placeholder,
he may get prompt to input something for arg1, then for arg2...
Regards, Oleg
_____________________________________________________________
Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
phone: +007(095)939-16-83, +007(095)939-23-83