Hello,

the support for XQuery 3.0 is really wonderful! Thank you.

Just a trifle: I think there is a little bug concerning the "group by" clause and the case that a non-grouping variable is reused as grouping variable, but the shorthand notation for this is not used. According to the spec, these expressions should be equivalent:

group by $x
group by $x := $x

I observed that in the shorthand notation $x references the grouping variable, that is, one value per group, as it should. But in the longhand notation, $x references the variable in the pre-grouping variable, and I suppose this should not be so.

For a full example, see below.

Kind regards,

Hans-Juergen

PS: Full example:

Code:

for $x in (1, 1, 2)
group by $x := $x
return <r x="{$x}"/>

Output:

<r x="1 1"/>
<r x="2"/>