Re: review: CHECK FUNCTION statement

Excerpts from Alvaro Herrera's message of sáb mar 03 17:56:23 -0300 2012:
> Excerpts from Alvaro Herrera's message of sáb mar 03 16:54:19 -0300 2012:
> > Excerpts from Pavel Stehule's message of sáb mar 03 02:25:52 -0300 2012:
> 
> > > 3. THE ARE NOT CARET - this is really important
> 
> > I am not sure about the caret thingy -- mainly because I don't think it
> > works all that well.

It doesn't work correctly with your patch; see sample below.  Note the
caret is pointing to an entirely nonsensical position.  I'm not sure
about duplicating the libpq line-counting logic in the backend.

Also note i18n seems to be working well, except for the "In function"
header, "query", and the error level.  That seems easily fixable.

I remain unconvinced that this is the best possible output.

alvherre=# create function f() returns int language plpgsql as $$
begin select
var
from
foo; end; $$;
CREATE FUNCTION
alvherre=# check function f();
                     CHECK FUNCTION                      
---------------------------------------------------------
 In function: 'f()'
 error:42P01:2:sentencia SQL:no existe la relación «foo»
 query:select                                           +
 var                                                    +
 from                                                   +
 foo
                       ^
(4 filas)

-- 
Álvaro Herrera <alvherre@commandprompt.com>
The PostgreSQL Company - Command Prompt, Inc.
PostgreSQL Replication, Consulting, Custom Development, 24x7 support