Re: [basex-talk] Peculiar External Binding and Casting Behaviour - BaseX-Talk - mailman.uni-konstanz.de

31 Oct 2017


      Hello there,
I found the problem! My code added a trailing space to the values of the
variables when binding.
After tokenizing in the XQuery, this creates a zero length string which
when cast to xs:integer then becomes an xs:double according to the error
message.
Is this intended behaviour?
Shaun
On 31 Oct 2017 06:20, "Shaun Flynn" scfy12@googlemail.com wrote:
...
Hello there,
I found the problem! My code added a trailing space to the values of the
variables when binding.
After tokenizing in the XQuery, this creates a zero length string which
when cast to xs:integer then becomes an xs:double according to the error
message.
Is this intended behaviour?
Shaun
On 30 Oct 2017 17:39, "Shaun Flynn" scfy12@googlemail.com wrote:
...
Hello there,
I created a simple example using the BaseX Java API, and that worked
fine, also using my code to create the query and submit it to a
ClientSession worked ok too :(
This was the query I ran:
declare variable $items external := "123 NIL";
declare variable $tokenizedItems:= tokenize($items," ");
for $item in $tokenizedItems
return
if($item = "NIL") then ("Nil") else (xs:integer($item))
Unable to reproduce the earlier result from today using my code as well :(
So I can understand the error better: "[FORG0001] Cannot cast to
xs:double: ."
The full stop after xs:double , does that relate to a decimal point or
the current item (xquery .)
Shaun
On 30 October 2017 at 10:31, Christian Grün christian.gruen@gmail.com
wrote:
...
Thanks. Some few lines of Java Code might already be sufficient
(provided that the problem can be reproduced with the XQuery snippet
that you sent in your last mail).
On Mon, Oct 30, 2017 at 11:24 AM, Shaun Flynn scfy12@googlemail.com
wrote:
...
Hello there,
I will put something together for you later on today in a .zip file.
Shaun
On 30 October 2017 at 10:22, Christian Grün <christian.gruen@gmail.com
wrote:
...
...
However, when I bind variables externally in Java, still getting the
same
problem, and I definitely not putting quotes around them there.
Do you have an example that might help me to reproduce it?
...
$depotConstraint: PM
$resourceConstraint: 143/6
$lowerDiagConstraint: 251
$upperDiagConstraint: 258
Oct 30, 2017 9:05:33 AM units.forms.UnitDiagramsController
fetchSelectedDiagrams
SEVERE: null
org.basex.core.BaseXException: Stopped at ., 29/61:
[FORG0001] Cannot cast to xs:double: .
On 30 October 2017 at 09:57, Christian Grün <
christian.gruen@gmail.com>
...
...
...
wrote:
>
> HiShaun,
>
> > I do not understand why that should be as there is clearly no
mention
...
...
...
> > of
> > xs:double in this query!
>
> I agree that the error message is misleading. You already get it
when
...
...
...
> invoking the following expression:
>
>   'a' cast as xs:integer
>
> I need to check the code, but I assume that an additional double
> conversion check takes place in the background in order to ensure
that
...
...
...
> the value can actually be converted to a non-fractional number.
>
> For more information on your query, it would be great if you could
> reduce it to a self-contained example that runs out of the box (I
> tried to invoke it, but your code seems to rely on an opened
> database).
>
> Best,
> Christian