2009/11/21 Merlin Moncure <mmonc...@gmail.com>: > On Sat, Nov 21, 2009 at 1:24 PM, Pavel Stehule <pavel.steh...@gmail.com> > wrote: >> 2009/11/21 Merlin Moncure <mmonc...@gmail.com>: >>> On Sat, Nov 21, 2009 at 12:36 PM, Andrew Dunstan <and...@dunslane.net> >>> wrote: >>>>> Perhaps part of the problem is that psql can't interpolate its variable >>>>> into strings. Solving that might lessen the impetus for this, and have >>>>> other >>>>> uses besides. >> I am not sure, if I understand well. Can you show some use cases, please? > > If I understand Andrew correctly, > > \set msg world > > DO $$ > BEGIN > RAISE NOTICE 'Hello, %', :msg; > END > $$; >
This is base of my proposal :). But we cannot do it directly: a) the body of DO statement is black box for psql parser, b) psql does know nothing about used PL language - without this knowledge cannot do correct substitution: plpgsq use ', java use "", perl use "" these points are reason, why I propose "external USING clause" - it outside blackbox, it is common for all PL Point b is solved via using a real params - not substitution. Regards Pavel -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
