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From: "Josh Berkus" <josh@agliodbs.com>
Subject: Re: PLpgSQL FOR IN EXECUTE question
To: Christoph Haller <ch@rodos.fzk.de>, pgsql-sql@postgresql.org
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Chris,

> FOR this_record IN
> EXECUTE ''SELECT ''
>         || quote_ident($1)
>         || ''FROM ''
>         || quote_ident($2)
> LOOP
>     list := list || '', '' || this_record.$1 ;
> END LOOP;
> 
> As expected, accessing a field via this_record.$1
> does not work.
> Can it be done otherwise?

Yes.  Alias the columns:

FOR this_record IN
EXECUTE ''SELECT ''
        || quote_ident($1)
        || '' AS col1 FROM ''     
        || quote_ident($2) 
	|| '' AS col2'' LOOP
    list := list || '', '' || this_record.col1 ;
END LOOP;