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https://issues.apache.org/jira/browse/JENA-1843?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17058011#comment-17058011
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Claus Stadler edited comment on JENA-1843 at 3/12/20, 3:24 PM:
---------------------------------------------------------------
Hi Andy,
While I tried to investigate JENA-1858, I checked out the latest master
(3.15.0-SNAPSHOT) which has the fix for JENA-1843 (this issue) included, but
this unfortunately gives me a failing test in my own code which reduces to this
line (it works with jena 3.14.0):
{code}
Query q = OpAsQuery.asQuery(Algebra.compile(QueryFactory.create("SELECT (?s AS
?x) { ?s ?p ?o }")));
{code}
The exception is:
{code}
java.lang.RuntimeException
at
org.apache.jena.sparql.algebra.walker.ApplyTransformVisitor.pop(ApplyTransformVisitor.java:458)
...
{code}
was (Author: aklakan):
Hi Andy,
I checked out the latest master (3.15.0-SNAPSHOT) which has the fix for
JENA-1843 (this issue) included, but this unfortunately gives me a failing test
in my own code which reduces to this line (it works with jena 3.14.0):
{code}
Query q = OpAsQuery.asQuery(Algebra.compile(QueryFactory.create("SELECT (?s AS
?x) { ?s ?p ?o }")));
{code}
The exception is:
{code}
java.lang.RuntimeException
at
org.apache.jena.sparql.algebra.walker.ApplyTransformVisitor.pop(ApplyTransformVisitor.java:458)
...
{code}
> OpAsQuery: Wrong order of Extend/Bind
> -------------------------------------
>
> Key: JENA-1843
> URL: https://issues.apache.org/jira/browse/JENA-1843
> Project: Apache Jena
> Issue Type: Bug
> Components: ARQ
> Affects Versions: Jena 3.14.0
> Reporter: Claus Stadler
> Assignee: Andy Seaborne
> Priority: Major
> Fix For: Jena 3.15.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> OpAsQuery breaks BINDs that depend on each other:
>
> {code:java}
> Query expected = QueryFactory.create("SELECT *
> { ?s ?p ?o BIND(?s AS ?x) BIND(?x AS ?y) }
> ");
> Query actual = OpAsQuery.asQuery(Algebra.compile(expected));
> System.out.println(expected);
> System.out.println(actual);
> {code}
> The two BIND statements incorrectly end up in reversed order - thus ?x is no
> longer bound in the result set:
> {code:java}
> expected: SELECT * WHERE { ?s ?p ?o BIND(?s AS ?x) BIND(?x AS ?y) }
> actual : SELECT * WHERE { ?s ?p ?o BIND(?x AS ?y) BIND(?s AS ?x) }
> {code}
>
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