SQL Script to remove waitlist

this script moves and converts all entries in the waitlist table into the bachelor table
and then deletes the deprecated waitlist table

registration-system/other/sqlDumps/update_20161013.sql

+-- this update merges the waitlist table with the bachelor table
+
+-- first add necessary columns to the bachelor table
+ALTER TABLE `bachelor`
+  ADD `on_waitlist` int(11) NOT NULL DEFAULT 0,
+  ADD `transferred` int(11) DEFAULT NULL;
+
+-- first move those, that are not transferred yet
+INSERT INTO `bachelor`
+(`bachelor_id`, `fahrt_id`, `anm_time`, `forname`, `sirname`,
+ `anday`, `abday`, `antyp`,`abtyp`, `pseudo`,
+ `mehl`, `essen`,`public`, `virgin`, `studityp`, `comment`,
+ `transferred`, `on_waitlist`, `version`,
+ `paid`,  `repaid`, `backstepped`)
+  SELECT `waitlist_id` AS `bachelor_id`,
+    `fahrt_id`, `anm_time`, `forname`, `sirname`,
+    `anday`, `abday`, `antyp`,`abtyp`, `pseudo`,
+    `mehl`, `essen`,`public`, `virgin`, `studityp`, `comment`,
+    NULL AS `transferred`, 1 AS `on_waitlist`, 0 AS `version`,
+    NULL AS `paid`, NULL AS `repaid`, NULL AS `backstepped`
+  FROM `waitlist` WHERE `transferred` IS NULL;
+
+-- now update those, that were transferred already
+UPDATE `bachelor` AS b, `waitlist` AS wl
+SET
+  b.`transferred`=wl.`transferred`,
+  b.`on_waitlist`=1
+WHERE
+  wl.`waitlist_id` = b.`bachelor_id` AND
+  wl.`fahrt_id` = b.`fahrt_id`;
+
+-- remove deprecated waitlist table
+DROP TABLE IF EXISTS `waitlist`;
\ No newline at end of file