From d15dd71b684b059b09aa5d6a8d7a8512541de6eb Mon Sep 17 00:00:00 2001
From: Damien Elmes <git@ichi2.net>
Date: Sat, 9 May 2009 03:25:46 +0900
Subject: [PATCH] speed up deleteDanglingFacts()

---
 anki/deck.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/anki/deck.py b/anki/deck.py
index f38bcd59a..ed756367c 100644
--- a/anki/deck.py
+++ b/anki/deck.py
@@ -1072,7 +1072,7 @@ where factId = :fid and cardModelId = :cmid""",
         "Delete any facts without cards. Return deleted ids."
         ids = self.s.column0("""
 select facts.id from facts
-where facts.id not in (select factId from cards)""")
+where facts.id not in (select distinct factId from cards)""")
         self.deleteFacts(ids)
         return ids