Merge branch 'main' into tracing

Author: Devdutt Shenoi

src/event/format/json.rs

@@ -87,6 +87,7 @@ impl EventFormat for Event {
                     infer_schema
                         .fields
                         .iter()
+                        .filter(|field| !field.data_type().is_null())
                         .cloned()
                         .sorted_by(|a, b| a.name().cmp(b.name()))
                         .collect()

src/handlers/http/ingest.rs

@@ -384,7 +384,7 @@ mod tests {
         let (rb, _) = into_event_batch(req, json, HashMap::default(), None, None).unwrap();
 
         assert_eq!(rb.num_rows(), 1);
-        assert_eq!(rb.num_columns(), 6);
+        assert_eq!(rb.num_columns(), 5);
         assert_eq!(
             rb.column_by_name("a").unwrap().as_int64_arr(),
             &Int64Array::from_iter([1])