fix: sort by time enable in follow (#5151)

src/service/search/datafusion/table_provider/mod.rs

@@ -311,7 +311,9 @@ impl TableProvider for NewListingTable {
                     )
                 }
             },
-            None => {} // no ordering required
+            None => {
+                log::debug!("don't not set split_file_groups_by_statistics");
+            } // no ordering required
         };
 
         // extract types of partition columns

src/service/search/grpc/flight.rs

@@ -100,6 +100,14 @@ pub async fn search(
         .downcast_ref::<NewEmptyExec>()
         .unwrap();
 
+    // because when init ctx we don't know this information
+    if empty_exec.sorted_by_time() {
+        ctx.state_ref().write().config_mut().options_mut().set(
+            "datafusion.execution.split_file_groups_by_statistics",
+            "true",
+        )?;
+    }
+
     // get stream name
     let stream_name = empty_exec.name();