[JENA-2207] A SERVICE call involving a SELECT projection may generate illegal syntax

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 4.3.0
• Fix Version/s: Jena 4.3.1, Jena 4.4.0
• Component/s: ARQ, SPARQL
• Assignee: Andy Seaborne
• Reporter: Andy Seaborne
• Created: 07/Dec/21 09:21
• Updated: 13/Dec/21 17:19
• Resolved: 08/Dec/21 14:05

Description

This is a regression in Jena 4.3.0.

Example:

SELECT * {
  SERVICE <http://localhost:3030/ds> {
      SELECT ?s { ?s ?p ?o }
  }
}

will have a compiled inner pattern with ?/p and ?/o. The ?p and ?o variables were rewritten to hide them (they are not in the SELECT ?s).

This rewrite needs to be reversed before sending the service-query.

Issue Links

• links to: GitHub Pull Request #1125