Обсуждение: plpgsql - accessing field in RECORD variable by text variables

Hello!

I have the following code which does not work:


CREATE OR REPLACE FUNCTION td1(integer) RETURNS REFCURSOR AS '
DECLARE
r article%ROWTYPE;
BEGIN

SELECT INTO r * FROM article WHERE key = $1;
a := ''some_other_field'';
RAISE NOTICE ''%'', r.a;
END;
' LANGUAGE 'plpgsql';

SELECT td1(229);


I would like to access RECORD type variables fields by assigning field (attribute) name
to some text variable and then access the field in RECORD which has the same name.

Is this possible in plpgsql?

I can not use the dot notation (fully qualification). What I would like to do
is some automatic field copying from another table to table being updated
and that this field copying can be managed in DB by changing some record in
my meta table.

Damjan

"Damjan Pipan" <damjan.pipan@siol.net> writes:
> I would like to access RECORD type variables fields by assigning field (attribute) name
> to some text variable and then access the field in RECORD which has the same name.

> Is this possible in plpgsql?

I don't think so, but you could probably do it in pltcl, since Tcl is
such a weakly typed language ...

            regards, tom lane

I would like to try it, but I was unable to install tcl under cygwin.

I have installed ActiveTCL and tried to compile with with-tcl option
and got undefined reference for all Tcl functions. Then I have tried to set
path --with-libs= set to tcl/lib dir and also with tclConfig.sh and tkConfig.sh,
but nothing worked.

I have also tried to compile the sources from sourceforge (for tcl) but got back the
same error.

Can anybody help me setting up the right path for tcl libs.

Damjan



> "Damjan Pipan" <damjan.pipan@siol.net> writes:
> > I would like to access RECORD type variables fields by assigning field (attribute) name
> > to some text variable and then access the field in RECORD which has the same name.
>
> > Is this possible in plpgsql?
>
> I don't think so, but you could probably do it in pltcl, since Tcl is
> such a weakly typed language ...
>
> regards, tom lane
>