Thanks Mike!

Relating particularly to this example, though, is the (now generally
unused) relevance adjustment code that targets exactly this problem by
boosting the score of (without restricting to) exact word matches.
One of the hopes with the "convert some stored procedures from perl or
plpgsql to C" GSoC project was to make that faster, but the expected
improvement didn't materialize quite as expected -- which, I want to
make clear, is not the fault of the student -- but I (and, it seems,
Dan, too, at least tangentially) will be looking at for
Evergreen.NEXT, along with other things like trigram indexing and some
other fun stuff.


I'm glad you brought this up because it leads to a question that has previously crossed my mind. What exactly is an "exact word match" when it's used for relevance ranking? I ask because an exact match search, which I believe would use the syntax of "^the assist$", does not work for this search because the full title (including subtitle) of this book is "The assist : hoops, hope, and the game of their lives." The exact match syntax seems to only work if it matches the entire field.

When the relevance adjustment code comes into play, is it also looking for a full-field match before boosting relevancy for a given title?

Thanks!
Kathy

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