Add analytics for the negative operator

milli/src/search/hybrid.rs

@@ -11,6 +11,7 @@ struct ScoreWithRatioResult {
     candidates: RoaringBitmap,
     document_scores: Vec<(u32, ScoreWithRatio)>,
     degraded: bool,
+    used_negative_operator: bool,
 }
 
 type ScoreWithRatio = (Vec<ScoreDetails>, f32);
@@ -78,6 +79,7 @@ impl ScoreWithRatioResult {
             candidates: results.candidates,
             document_scores,
             degraded: results.degraded,
+            used_negative_operator: results.used_negative_operator,
         }
     }
 
@@ -113,6 +115,7 @@ impl ScoreWithRatioResult {
             documents_ids,
             document_scores,
             degraded: left.degraded | right.degraded,
+            used_negative_operator: left.used_negative_operator | right.used_negative_operator,
         }
     }
 }

milli/src/search/mod.rs

@@ -183,6 +183,7 @@ impl<'a> Search<'a> {
             documents_ids,
             document_scores,
             degraded,
+            used_negative_operator,
         } = match self.vector.as_ref() {
             Some(vector) => execute_vector_search(
                 &mut ctx,
@@ -221,7 +222,14 @@ impl<'a> Search<'a> {
             None => MatchingWords::default(),
         };
 
-        Ok(SearchResult { matching_words, candidates, document_scores, documents_ids, degraded })
+        Ok(SearchResult {
+            matching_words,
+            candidates,
+            document_scores,
+            documents_ids,
+            degraded,
+            used_negative_operator,
+        })
     }
 }
 
@@ -272,6 +280,7 @@ pub struct SearchResult {
     pub documents_ids: Vec<DocumentId>,
     pub document_scores: Vec<Vec<ScoreDetails>>,
     pub degraded: bool,
+    pub used_negative_operator: bool,
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]

milli/src/search/new/mod.rs

@@ -571,6 +571,7 @@ pub fn execute_vector_search(
         documents_ids: docids,
         located_query_terms: None,
         degraded,
+        used_negative_operator: false,
     })
 }
 
@@ -594,6 +595,7 @@ pub fn execute_search(
 ) -> Result<PartialSearchResult> {
     check_sort_criteria(ctx, sort_criteria.as_ref())?;
 
+    let mut used_negative_operator = false;
     let mut located_query_terms = None;
     let query_terms = if let Some(query) = query {
         let span = tracing::trace_span!(target: "search::tokens", "tokenizer_builder");
@@ -636,6 +638,7 @@ pub fn execute_search(
 
         let (query_terms, negative_words) =
             located_query_terms_from_tokens(ctx, tokens, words_limit)?;
+        used_negative_operator = !negative_words.is_empty();
 
         let ignored_documents = resolve_negative_words(ctx, &negative_words)?;
         universe -= ignored_documents;
@@ -710,6 +713,7 @@ pub fn execute_search(
         documents_ids: docids,
         located_query_terms,
         degraded,
+        used_negative_operator,
     })
 }
 
@@ -772,4 +776,5 @@ pub struct PartialSearchResult {
     pub document_scores: Vec<Vec<ScoreDetails>>,
 
     pub degraded: bool,
+    pub used_negative_operator: bool,
 }