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

[John Doyle]

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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