Re: patch: function xmltable

2017-01-25 5:45 GMT+01:00 Tom Lane <tgl@sss.pgh.pa.us>:

> Andres Freund <andres@anarazel.de> writes:
> > On 2017-01-24 21:32:56 -0300, Alvaro Herrera wrote:
> >> XMLTABLE is specified by the standard to return multiple rows ... but
> >> then as far as my reading goes, it is only supposed to be supported in
> >> the range table (FROM clause) not in the target list.  I wonder if
> >> this would end up better if we only tried to support it in RT.  I asked
> >> Pavel to implement it like that a few weeks ago, but ...
>
> > Right - it makes sense in the FROM list - but then it should be an
> > executor node, instead of some expression thingy.
>
> +1 --- we're out of the business of having simple expressions that
> return rowsets.
>

If we do decision so this kind of function will have different behave than
other SRF functions, then I remove support for this.

There are not technical reasons (maybe I don't see it) - last Andres
changes do well support for my code.

Regards

Pavel


>
>                         regards, tom lane
>