[teiid-users] unexpected query results against XML data source

[Mike Mascari]

That's excellent news. I had grabbed the 6.2.0 M2 snapshot (v20090820) of teiid-designer. 

- Mike



________________________________
From: John Doyle <jdoyle at redhat.com>
To: Mike Mascari <mascarim at yahoo.com>
Cc: teiid-users at lists.jboss.org
Sent: Wednesday, September 2, 2009 10:47:54 AM
Subject: Re: [teiid-users] unexpected query results against XML data source


Mike,

The defect you've uncovered isn't the same as TEIID-93, it's much simpler and obvious.  I'm checking in a change for 6.2 today.  Are you working with 6.2 or 6.1?

~jd
----- "Mike Mascari" <mascarim at yahoo.com> wrote: 
> 
> 
I've attached both the xml and the xsd used and re-tested the importation and query against them with the same result. Thanks for looking into it! Could it be the same issue as this:

> 
https://jira.jboss.org/jira/browse/TEIID-93

> 
??

> 
My issue is a much simpler case, however. The query needn't be pushed down as apart of the planner over a federated view to cause the irregularity -- one need only query the XML source directly. 

> 
Thanks again!

> 
And just for giggles:

> 
# xmllint --schema clients.xsd clients.xml 
<?xml version="1.0" encoding="UTF-8"?>
<clients>
  <client>
    <name>acme</name>
    <rate>15</rate>
  </client>
  <client>
    <name>toolwerks</name>
    <rate>20</rate>
  </client>
</clients>
clients.xml validates

> 
:-)

> 
- Mike
> 
> 
> 
________________________________
From: John Doyle <jdoyle at redhat.com>
> To: Mike Mascari <mascarim at yahoo.com>
> Cc: teiid-users at lists.jboss.org
> Sent: Tuesday, September 1, 2009 11:48:24 AM
> Subject: Re: [teiid-users] unexpected query results against XML data source
> 
> 
> Hi Mike,
> 
> I've tried to reproduce this but get no root elements to select from during the import process.  Is it possible that the XSD pasted here is different from what you're using?
> 
> ~jd
> ----- "Mike Mascari" <mascarim at yahoo.com> wrote: 
> > 
> > 
Hello. I've downloaded and installed the snapshot as of today (8/31/2009) and, using the designer:

> > 
1. Used Import->XML Schema as Relational Source Model

> > 
2. Selected Document over HTTP with no request parameters

> > 
3. Selected No Catalog

> > 
4. Chose "File System" as source of XML Schema (inlined below)

> > 
5. Chose "client" (I've tried w/"clients" as well) as the root element and "Finish"

> > 
6. Create a "purchasing" View Model and, with "purchasing" selected, created an "example" BaseTable. I then drag-and-drop "client" from clients.xmi Source Model into SOURCES pane. (This View abstraction turns out not to be the problem -- I query the Source via the Execute'd VDB with the same outcome.)

> > 
7. Created a "billing" vdb, cleaned, built, and synchronized.

> > 
8. Then, with this data served up by apache:

> > 
<?xml version="1.0" encoding="UTF-8"?>
<clients>
  <client>
    <name>acme</name>
    <rate>15</rate>
  </client>
  <client>
    <name>toolwerks</name>
    <rate>20</rate>
  </client>
</clients>

> > 
I issued the following query:

> > 
select * from clients.client

> > 
and received the expected result:

> > 
null;acme;15
null;toolwerks;20

> > 
9. Then I did this:

> > 
select * from clients.client where name = 'acme'

> > 
and received *two rows*:

> > 
null;acme;15
null;toolwerks;20

> > 
10. So I did this:

> > 
select * from clients.client where name != 'acme' 

> > 
and received the expected one row:

> > 
null;toolwerks;20

> > 
???

> > 
Is there something goofy with the equality operator against XML data? Is there flag that needs flipped on these attributes? I went with the "string" mapping on the 'XML Schema as Relational Source Model' dialog wizard (pane 4 IIRC). Oughtn't I have? I also changed XML node names that might have been SQL keywords ('name' -> 'fullname') but no dice...

> > 
Thoughts? 

> > 
- Mike

> > 
Schema:

> > 
<?xml version="1.0"?>

> > 
  <!-- our client database -->

> > 
  <xs:element name="clients">
  
    <xs:complexType>
      <xs:sequence>

> > 
        <!-- the client -->
              
        <xs:element name="client" minOccurs="1" maxOccurs="unbounded">
          <xs:complexType>
            <xs:sequence>

> > 
              <!-- client name -->

> > 
              <xs:element name="name" type="xs:string" minOccurs="1" maxOccurs="1"/>

> > 
              <!-- bill rate -->

> > 
              <xs:element name="rate" minOccurs="0">
                <xs:simpleType>
                  <xs:restriction base="xs:decimal">
                    <xs:minInclusive value="50"/>
                    <xs:maxInclusive value="250"/>
                  </xs:restriction>
                </xs:simpleType>
              </xs:element>

> > 
            </xs:sequence>

> > 
          </xs:complexType>

> > 
        </xs:element>

> > 
      </xs:sequence>
    </xs:complexType>

> > 
  </xs:element>
</xs:schema>

> > 
> > 
> > 
> > _______________________________________________
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> 
> 
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