Function Doubt

Inside a function of trigger type, i have:

Declare
qCampos record;
StrCampo string;
StrInsert string;
Begin

StrCampo = '''';
StrInsert = '''';

For qCampos in select pga.attname from pg_class pgc, pg_attribute pga
where pgc.relname = '''' || tg_relname || '''' and
pgc.oid = pga.attrelid and pga.attnum > 0 and
attisdropped <> ''t'' Loop

StrCampo = ''new.'' || qCampos.attname;
StrInsert = StrInsert || virgula || StrCampo || '' - '';
End Loop;

Return new;
End;

What i need to do for the variable StrCampo returns to me "SP", "RJ", i
mean, return a value inserted into the field.
I do not want to use static command new.campo1, new.campo2....

Thanks,

Wilton Ruffato Wonrath

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