diff --git a/lib/db/clickhouse.js b/lib/db/clickhouse.js
index e55e4542..4a14c5fc 100644
--- a/lib/db/clickhouse.js
+++ b/lib/db/clickhouse.js
@@ -1363,7 +1363,7 @@ const samplesReadTable = {
  */
 const rawRequest = async (query, data, database, config) => {
   try {
-    if (!(Buffer.isBuffer(data) || data instanceof Uint8Array || typeof data === 'string')) {
+    if (data && !(Buffer.isBuffer(data) || data instanceof Uint8Array || typeof data === 'string')) {
       throw new Error('data must be Buffer, Uint8Array or String: currently the data is: ' + typeof data)
     }
     if (typeof query !== 'string') {