diff -r 00b1b6b906cf -r 97c55baefa0c misc/migration/3.9.0_Any.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/migration/3.9.0_Any.py	Mon Jul 19 15:37:02 2010 +0200
@@ -0,0 +1,3 @@
+if repo.system_source.dbdriver == 'postgres':
+    sql('ALTER TABLE appears ADD COLUMN weight float')
+    sql('UPDATE appears SET weight=1.0 ')