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Change MediaQueryBuilder to use a ConstantScore query for statements queries
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According to David it makes no sense to use scoring functions designed for human languages in the context of queries for strings like "P180=Q42", and we ought to use ConstantScore queries instead

Acceptance criteria:

  • if you look at http://<wiki>/w/index.php?search=SEARCH_TERM&ns6=1&mediasearch=1&cirrusDumpQuery you should see that queries for "PXXX=QYYY" are constant_score rather than match queries in the should section of query
  • if you look at http://<wiki>/w/index.php?search=SEARCH_TERM&ns6=1&mediasearch=1&cirrusDumpResult&cirrusExplain=pretty you should see that there's a "Constant scored query" section for each result where we have a match for "PXXX=QYYY"

Event Timeline

Change 612621 had a related patch set uploaded (by Cparle; owner: Cparle):
[mediawiki/extensions/WikibaseMediaInfo@master] Use ConstantScore queries for statements

Change 612621 merged by jenkins-bot:
[mediawiki/extensions/WikibaseMediaInfo@master] Use ConstantScore queries for statements

This was done, and then un-done because we found that using a match query gave us better results