Adrien Grand b16e2d95af Allow scripts to expose whether they use the _score.
This commit adds a new API to allow scripts to say whether they need scores.
In practice, only the `expression` script engine makes use of it correctly,
other engines just return `true` since they can't predict whether they'll
need scores. This should make scripted aggregations and `function_query`
faster as we'll now be able to pass needsScores=false to Query.createWeight.
2015-08-06 17:25:51 +02:00
..
2015-08-05 21:45:09 -04:00