Aklakan opened a new issue, #1656:
URL: https://github.com/apache/jena/issues/1656
### Version
4.7.0-SNAPSHOT
### What happened?
This is the bug report for the upcoming PR that solves the following 3
issues with the service enhancer plugin:
* A bug in the bulk-query rewriter of the service enhancer omits the ORDER
BY on the final query when both LIMIT and ORDER BY are present on the sub-query
being looped over:
```sparql
SELECT * {
VALUES ?s { <foo> <bar> }
SERVICE <loop:> {
SELECT * { ?s rdfs:label ?l } ORDER BY ?l LIMIT 1
}
}
```
The members of the generated UNION query incorrectly lack the ORDER BY
clause.
* We noticed and fixed an issues with the service enhancer on a TDB with
default union graph enabled where unexpectedly triple patterns would not
matched against the default graph anymore:
```
?s ?p ?o # This pattern matches correctly against the union default graph
SERVICE <{loop|cache|bulk}:> { ?o ?x ?y } # Used to not match against the
default graph anymore.
```
In essence the solution is to use QueryEngineRegistry (which gives all
registered plugins a chance to do their processing) rather than QC.execute.
### Relevant output and stacktrace
_No response_
### Are you interested in making a pull request?
Yes
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