From f9a4326461a3e5fc8cbdb39fbd5b79eff701cb62 Mon Sep 17 00:00:00 2001
From: Huaijin <haohuaijin@gmail.com>
Date: Fri, 12 May 2023 17:36:03 +0800
Subject: [PATCH] fix:  unwrap() `None` in NULL value exist multi-field table
 during prometheus `query_range` (#1571)

* fix: NULL value in multi-field table meet error in prometheus query_range

* fix: suggestion

* chore: change style
---
 src/servers/src/prom.rs | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/servers/src/prom.rs b/src/servers/src/prom.rs
index 7dabf45f4e..eaee673de6 100644
--- a/src/servers/src/prom.rs
+++ b/src/servers/src/prom.rs
@@ -350,10 +350,12 @@ impl PromJsonResponse {
                 let timestamp = timestamp_millis as f64 / 1000.0;
 
                 // retrieve value
-                let value =
-                    Into::<f64>::into(field_column.get_data(row_index).unwrap()).to_string();
-
-                buffer.entry(tags).or_default().push((timestamp, value));
+                if let Some(v) = field_column.get_data(row_index) {
+                    buffer
+                        .entry(tags)
+                        .or_default()
+                        .push((timestamp, Into::<f64>::into(v).to_string()));
+                };
             }
         }