On 28/03/16 16:33, Joshua TAYLOR wrote:
On Mon, Mar 28, 2016 at 11:27 AM, Joshua TAYLOR <[email protected]> wrote:
On Mon, Mar 28, 2016 at 6:43 AM, Andy Seaborne <[email protected]> wrote:
Encountered " "distinct" "DISTINCT "" at line 6, column 129
Check the syntax at that point.
(GROUP_CONCAT DISTINCT (?x) ...
is wrong.
Andy,
I actually started another thread about this (not knowing about this
one), and that error looks like it might on Jena's end. If you throw,
e.g.,
select (group_concat(distinct ?x) as ?y) {}
into the validator on sparql.org, it parses it and formats it as
select (group_concat distinct (?x) as ?y) where {}
If Jena's parsing it and sending the re-formatted query along, the
remote endpoint would complain about the injected syntax error.
Is it significant that
https://github.com/apache/jena/blob/0653392c24d6ec0d83c97c77f789a85b3c3b79de/jena-arq/src/main/java/org/apache/jena/sparql/expr/aggregate/AggGroupConcat.java#L71
appends a group_concat with a following (, whereas
https://github.com/apache/jena/blob/0653392c24d6ec0d83c97c77f789a85b3c3b79de/jena-arq/src/main/java/org/apache/jena/sparql/expr/aggregate/AggGroupConcat.java#L91
doesn't?
Hi Joshua,
Thanks for taking the time to investigate.
Good news - this is a fixed bug.
https://issues.apache.org/jira/browse/JENA-1091
so it is not in 3.0.1 release, getting fix on the day of the release, 3
days after the build.
asSparqlExpr is the method that creates SPARQL syntax:
and it says:
x.append("GROUP_CONCAT(") ;
if ( isDistinct )
x.append("DISTINCT ") ;
so it is GROUP_CONCAT(DISTINCT ...) now.
prefixGroupConcatString creates syntax for the algebra form.
sparql.org is not up-to-date - unfortunately that machine (it's part of
the Apache infrastructure and a FreeBSD host machine running with jails
to isolate services) does not have an installable Java8 so it is not
up-to-date. It needs migrating sometime.
Andy
The OP is currently bombarding the users@ moderator with emails due to
not subscribing.
Andy
On 28/03/16 11:39, Andy Seaborne wrote:
Hi there,
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Andy
On 28/03/16 11:37, [email protected] wrote:
Dears,
I've been having this problem since a long time and unfortunately no
one on StackOverFlow could find the solution. It is definitely a bug
in Jena, could you have a look please?
https://stackoverflow.com/questions/36137483/sparql-query-works-on-the-fuseki-interface-but-in-jena
--
Joshua Taylor, http://www.cs.rpi.edu/~tayloj/
