[JENA-1517] Some queries not working when using OpQuadBlock

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 3.6.0
• Fix Version/s: Jena 3.8.0
• Component/s: ARQ
• Assignee: Andy Seaborne
• Reporter: Jeremy Coulon
• Created: 09/Apr/18 12:30
• Updated: 03/Jan/23 10:20
• Resolved: 13/Apr/18 14:15

Description

I am using a custom QueryEngine that rewrites algebra. I am transforming OpBGP into OpQuadBlock (not OpQuadPattern).

Most queries work fine except when using one of the following:

• MINUS
• FILTER EXISTS
• FILTER NOT EXISTS

I tracked the issue down to this visitor: org.apache.jena.sparql.algebra.OpVarsPattern.

An override for visit(OpQuadBlock) is missing.

Issue Links

• links to: GitHub Pull Request #118
• links to: GitHub Pull Request #393