From 011f274830480cffb525adbd2550f3a109e86432 Mon Sep 17 00:00:00 2001
From: Martin Brodbeck <martin@brodbeck-online.de>
Date: Fri, 19 Jul 2024 15:52:07 +0200
Subject: [PATCH] Revert "Using 'false' for sql query, which works with all db
 versions."

This reverts commit 7998ff7d6076b5061afe8e5446ade02674800051.
---
 src/calibre/devices/kobo/driver.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/calibre/devices/kobo/driver.py b/src/calibre/devices/kobo/driver.py
index f3e3e4f3fe..3eeec567da 100644
--- a/src/calibre/devices/kobo/driver.py
+++ b/src/calibre/devices/kobo/driver.py
@@ -3086,7 +3086,10 @@ class KOBOTOUCH(KOBO):
         if not self.supports_bookshelves:
             return bookshelves
 
-        query = "SELECT Name FROM Shelf WHERE _IsDeleted = 'false'"
+        if self.dbversion >= 188:
+            query = 'SELECT Name FROM Shelf WHERE _IsDeleted = false'
+        else:
+            query = 'SELECT Name FROM Shelf WHERE _IsDeleted = "false"'
 
         cursor = connection.cursor()
         cursor.execute(query)