Lucas_Werkmeister_WMDE added a comment.

Okay, I5c98bb3dd9 gets rid of wikibase-beta, which simplifies things a bit. After that, I think we have two options:

  • Introduce a flag whether the query service has the default prefixes built-in, and skip them if that flag is set to true. To stay on the safe side, it should probably default to false, so we’d also need a production config change to set it to true there.
  • Just assume the query service has the default prefixes built-in, and no user will ever use a different SPARQL server.

I would prefer the first option, but just today I realized that we’re currently acting more like the second option: for “has type” queries, we include query hints without even specifying the hint: prefixes, which is completely broken on non-BlazeGraph servers. So if we want to go for the first option, there should probably also be a “supports query hints” flag (or it could be merged with “supports default prefixes” into “is a Wikibase RDF Query server”).


TASK DETAIL
https://phabricator.wikimedia.org/T204317

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