Remove duplicate rows

2015-04-10 18:47:03 +01:00 · 2015-04-10 18:47:03 +01:00 · 93937b2b31
parent c5365dee56
commit 93937b2b31
1 changed files with 9 additions and 0 deletions
--- a/synapse/storage/schema/delta/16/remove_duplicates.sql
+++ b/synapse/storage/schema/delta/16/remove_duplicates.sql
@ -0,0 +1,9 @@
+
+
+DELETE FROM event_to_state_groups WHERE state_group not in (
+    SELECT MAX(state_group) FROM event_to_state_groups GROUP BY event_id
+);
+
+DELETE FROM event_to_state_groups WHERE rowid not in (
+    SELECT MIN(rowid) FROM event_to_state_groups GROUP BY event_id
+);