Merge pull request #111 from jdeniau/raw-sql-without-data

jdeniau · Oct 7, 2024 · 6b67f99 · 6b67f99
2 parents 7690f2c + e9fab46
commit 6b67f99
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/src/sql/type-guard.ts b/src/sql/type-guard.ts
@@ -1,7 +1,7 @@
 import { ResultSetHeader, RowDataPacket } from 'mysql2';
 import { QueryReturnType } from './types';
 
-function isObjectAResultSetHeader(obj: object): boolean {
+function isObjectAResultSetHeader(obj: object): obj is ResultSetHeader {
   // test all keys that are present in ResultSetHeader (except deprecated "changedRows")
   return (
     'fieldCount' in obj &&
@@ -55,6 +55,11 @@ export function isRowDataPacketArray(
     return false;
   }
 
+  if (obj.length === 0) {
+    // a result with no data
+    return true;
+  }
+
   const firstItem = obj[0];
 
   if (typeof firstItem !== 'object') {