Smalyshev added a subscriber: LucasWerkmeister.
Smalyshev added a comment.

@LucasWerkmeister interesting question. There's two things we need to check I guess:

  1. Write the SPARQL query and see if it performs properly.
  2. See if that doesn't open us to the same issues as before.

In general, Blazegraph has timeboxing on queries, and does not use PCRE engine (it uses java.util.regex AFAIK). But in theory there could be some problem there. Since it's just generic query, that problem would be present regardless of constrains, though, so we should not be a concern.

So, I'd write the queries and test if they perform well, and if so, I think it's ok to add query constraints for this one.


TASK DETAIL
https://phabricator.wikimedia.org/T102752

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To: Smalyshev
Cc: LucasWerkmeister, Lucas_Werkmeister_WMDE, Smalyshev, Aklapper, Jonaskeutel, GoranSMilovanovic, QZanden, Izno, Luke081515, Wikidata-bugs, aude, fbstj, Mbch331
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