Re: [HACKERS] patch: function xmltable

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.
        regards, tom lane