ANSWERS to "What's wrong with XQuery" question

[Mike Sokolov]

On 07/28/2010 03:26 AM, Daniela Florescu wrote:
>>   but in xquery, a comma can introduce an entirely new statement 
>> because a sequence can appear pretty much anywhere and there is no 
>> required statement terminator
>
> Mike,
>
> I am not sure what you mean by that.
>
Sorry, I was a bit vague.  What I meant was that at one time I had some 
confusion due to the difference between:

for $x in (1 to 2)
return (<x>{$x}</x>, <y>3</y>)

and

for $x in (1 to 2)
return <x>{$x}</x>, <y>3</y>

My experience has been that the first statement returns:


<x>1</x>
<y>3</y>
<x>2</x>
<y>3</y>

while the second returns:

<x>1</x>
<x>2</x>
<y>3</y>

since it splits the whole expression at the comma and handles the two 
halves as separate statements (flwors).