From 82c8a6bf84aaa862f292212c5190ca5d3bd44fc9 Mon Sep 17 00:00:00 2001
From: NguyenND <ngodanguyen@gmail.com>
Date: Fri, 22 May 2026 09:34:35 -0400
Subject: [PATCH] Fix explain 'NoneType' error

---
 app/ui/sql_editor.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app/ui/sql_editor.py b/app/ui/sql_editor.py
index 40cf5e2..8fb0691 100644
--- a/app/ui/sql_editor.py
+++ b/app/ui/sql_editor.py
@@ -527,6 +527,9 @@ class EditorTab(QWidget):
         self._stop_btn.setEnabled(False)
 
     def _explain(self):
+        if not self._driver:
+            self._results.show_error("No active connection. Connect to a database first.")
+            return
         sql = self._editor.selected_or_all().strip()
         if not sql:
             return