--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SQL/sqlite/2015111100.sql	Sat Dec 29 07:07:34 2018 -0500
@@ -0,0 +1,35 @@
+CREATE TABLE tmp_users (
+  user_id integer NOT NULL PRIMARY KEY,
+  username varchar(128) NOT NULL default '',
+  mail_host varchar(128) NOT NULL default '',
+  created datetime NOT NULL default '0000-00-00 00:00:00',
+  last_login datetime DEFAULT NULL,
+  failed_login datetime DEFAULT NULL,
+  failed_login_counter integer DEFAULT NULL,
+  language varchar(5),
+  preferences text NOT NULL default ''
+);
+
+INSERT INTO tmp_users (user_id, username, mail_host, created, last_login, language, preferences)
+    SELECT user_id, username, mail_host, created, last_login, language, preferences FROM users;
+
+DROP TABLE users;
+
+CREATE TABLE users (
+  user_id integer NOT NULL PRIMARY KEY,
+  username varchar(128) NOT NULL default '',
+  mail_host varchar(128) NOT NULL default '',
+  created datetime NOT NULL default '0000-00-00 00:00:00',
+  last_login datetime DEFAULT NULL,
+  failed_login datetime DEFAULT NULL,
+  failed_login_counter integer DEFAULT NULL,
+  language varchar(5),
+  preferences text NOT NULL default ''
+);
+
+INSERT INTO users (user_id, username, mail_host, created, last_login, language, preferences)
+    SELECT user_id, username, mail_host, created, last_login, language, preferences FROM tmp_users;
+
+CREATE UNIQUE INDEX ix_users_username ON users(username, mail_host);
+
+DROP TABLE tmp_users;