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Posted to dev@jena.apache.org by Rachel Han <ra...@vmlabs.id.au> on 2017/10/22 23:21:43 UTC

ERROR [TransformSDB] OpTable : Not join identity

Hi list,

I am quite new to jena/sparql. Recently I have spotted an error while
running any sparql query with "values" keyword.
It gave me this line in the log : ERROR [TransformSDB] OpTable : Not join
identity

e.g.
PREFIX dm: <http://learningsparql.com/ns/demo#>

SELECT * WHERE { }
   VALUES (?color ?direction) {
   ( dm:red  "north" )
   ( dm:blue  "west" )
}

We are using
jena 2.10.1,
jena-arq 2.10.1,
jena-sdb 1.3.6,
jena-tdb 0.10.0,
jena-iri 0.9.6

mysql database version 5.7
sparql version 1.1

Would anyone have the same issue like this? Please help :)

Thanks in advance.

Cheers,
Rachel

Re: ERROR [TransformSDB] OpTable : Not join identity

Posted by Andy Seaborne <an...@apache.org>.

While an error is printed , the code drop through an processes it 
anyway.  The code seems to reflect an attempt to insert constants in the 
query ... but that's not active so the whole thing is a no-op for SDB.

Looks like the error can be ignored.

Does it produce the wrong answers at all?

     Andy

On 23/10/17 15:43, Andy Seaborne wrote:
> Hi Rachel,
> 
> That's a very old version of SDB but the bug is still there (I just 
> tested).  Actually, I'm not sure it is a bug because I get the right 
> answers.  Does it produce the wrong answers at all?
> 
> The latest versions are all "3.4.0" - and you need to reload data when 
> migrating.
> 
>      Andy
> 
> https://jena.apache.org/documentation/migrate_jena2_jena3.html
> 
> On 23/10/17 00:21, Rachel Han wrote:
>> Hi list,
>>
>> I am quite new to jena/sparql. Recently I have spotted an error while
>> running any sparql query with "values" keyword.
>> It gave me this line in the log : ERROR [TransformSDB] OpTable : Not join
>> identity
>>
>> e.g.
>> PREFIX dm: <http://learningsparql.com/ns/demo#>
>>
>> SELECT * WHERE { }
>>     VALUES (?color ?direction) {
>>     ( dm:red  "north" )
>>     ( dm:blue  "west" )
>> }
>>
>> We are using
>> jena 2.10.1,
>> jena-arq 2.10.1,
>> jena-sdb 1.3.6,
>> jena-tdb 0.10.0,
>> jena-iri 0.9.6
>>
>> mysql database version 5.7
>> sparql version 1.1
>>
>> Would anyone have the same issue like this? Please help :)
>>
>> Thanks in advance.
>>
>> Cheers,
>> Rachel
>>

Re: ERROR [TransformSDB] OpTable : Not join identity

Posted by Andy Seaborne <an...@apache.org>.

Hi Rachel,

That's a very old version of SDB but the bug is still there (I just 
tested).  Actually, I'm not sure it is a bug because I get the right 
answers.  Does it produce the wrong answers at all?

The latest versions are all "3.4.0" - and you need to reload data when 
migrating.

     Andy

https://jena.apache.org/documentation/migrate_jena2_jena3.html

On 23/10/17 00:21, Rachel Han wrote:
> Hi list,
> 
> I am quite new to jena/sparql. Recently I have spotted an error while
> running any sparql query with "values" keyword.
> It gave me this line in the log : ERROR [TransformSDB] OpTable : Not join
> identity
> 
> e.g.
> PREFIX dm: <http://learningsparql.com/ns/demo#>
> 
> SELECT * WHERE { }
>     VALUES (?color ?direction) {
>     ( dm:red  "north" )
>     ( dm:blue  "west" )
> }
> 
> We are using
> jena 2.10.1,
> jena-arq 2.10.1,
> jena-sdb 1.3.6,
> jena-tdb 0.10.0,
> jena-iri 0.9.6
> 
> mysql database version 5.7
> sparql version 1.1
> 
> Would anyone have the same issue like this? Please help :)
> 
> Thanks in advance.
> 
> Cheers,
> Rachel
>