(Calculated fields) Allow aggregations on calculated fields

quickwit/Cargo.toml

@@ -379,7 +379,7 @@ quickwit-telemetry-exporters = { path = "quickwit-telemetry-exporters" }
 quickwit-transport = { path = "quickwit-transport" }
 
 # This is the tip of tantivy main.
-tantivy = { git = "https://github.com/quickwit-oss/tantivy/", rev = "2e87c2eb0c8577c96c82a777f345bbf236a985fe", default-features = false, features = [
+tantivy = { git = "https://github.com/quickwit-oss/tantivy/", rev = "8a4cfc40f5b7446c0700471aa50290dbb7f8ea97", default-features = false, features = [
   "jitexpr",
   "lz4-compression",
   "mmap",
@@ -388,7 +388,7 @@ tantivy = { git = "https://github.com/quickwit-oss/tantivy/", rev = "2e87c2eb0c8
   "columnar-zstd-compression",
 ] }
 # Must stay on the same rev as `tantivy`.
-tantivy-common = { git = "https://github.com/quickwit-oss/tantivy/", rev = "2e87c2eb0c8577c96c82a777f345bbf236a985fe" }
+tantivy-common = { git = "https://github.com/quickwit-oss/tantivy/", rev = "8a4cfc40f5b7446c0700471aa50290dbb7f8ea97" }
 tantivy-fst = "0.5"
 
 # This is actually not used directly the goal is to fix the version

quickwit/quickwit-proto/protos/quickwit/search.proto

@@ -285,6 +285,19 @@ message SearchRequest {
   // Scheduling priority for leaf search execution. Negative values are allowed,
   // and lower values have higher priority. Callers that omit it get priority 0.
   int32 priority = 21;
+
+  // Calculated fields: fields computed from fast fields with a jitexpr expression.
+  // Aggregations can use them as field names.
+  repeated CalculatedField calculated_fields = 22;
+}
+
+message CalculatedField {
+  // Name of the calculated field, as used in the aggregation request.
+  // A calculated field shadows a fast field with the same name.
+  string name = 1;
+  // Jitexpr expression, serialized as a string. For example: `(MULTIPLY price stock)`.
+  // Variables refer to fast fields.
+  string expression = 2;
 }
 
 enum CountHits {