From e7b0c3e2b68e30f56ddaa29a2c76618016645a22 Mon Sep 17 00:00:00 2001
From: Roman M <roman.misyurin@gmail.com>
Date: Tue, 25 Jun 2024 11:15:17 +0200
Subject: [PATCH] fix gh-api issue

---
 src/datasource/sql_series.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/datasource/sql_series.ts b/src/datasource/sql_series.ts
index 2aca00276..2d5716c5b 100644
--- a/src/datasource/sql_series.ts
+++ b/src/datasource/sql_series.ts
@@ -293,6 +293,11 @@ export default class SqlSeries {
       if (keyColumns.length > 0) {
         metricKey = keyColumns.map((name: string) => {
           const value = row[name];
+
+          if (typeof value === 'undefined') {
+            return undefined;
+          }
+
           if (typeof value === 'object') {
             return JSON.stringify(value);
           } else {