Add schedule timezone column

schema/mysql/schema.sql

@@ -88,6 +88,7 @@ CREATE INDEX idx_contactgroup_member_changed_at ON contactgroup_member(changed_a
 CREATE TABLE schedule (
     id bigint NOT NULL AUTO_INCREMENT,
     name text NOT NULL COLLATE utf8mb4_unicode_ci,
+    timezone text NOT NULL, -- e.g. 'Europe/Berlin'
 
     changed_at bigint NOT NULL,
     deleted enum('n', 'y') NOT NULL DEFAULT 'n',

schema/mysql/upgrades/0.2.0-schedule-timezone.sql

@@ -0,0 +1,12 @@
+ALTER TABLE schedule ADD COLUMN timezone text AFTER name;
+UPDATE schedule SET timezone = (
+    SELECT entry.timezone
+    FROM timeperiod_entry entry
+    INNER JOIN timeperiod ON timeperiod.id = entry.timeperiod_id
+    INNER JOIN rotation ON rotation.id = timeperiod.owned_by_rotation_id
+    WHERE rotation.schedule_id = schedule.id
+    ORDER BY entry.id
+    LIMIT 1
+);
+UPDATE schedule SET timezone = 'UTC' WHERE timezone IS NULL;
+ALTER TABLE schedule MODIFY COLUMN timezone text NOT NULL;

schema/pgsql/schema.sql

@@ -121,6 +121,7 @@ CREATE INDEX idx_contactgroup_member_changed_at ON contactgroup_member(changed_a
 CREATE TABLE schedule (
     id bigserial,
     name citext NOT NULL,
+    timezone text NOT NULL, -- e.g. 'Europe/Berlin'
 
     changed_at bigint NOT NULL,
     deleted boolenum NOT NULL DEFAULT 'n',

schema/pgsql/upgrades/0.2.0-schedule-timezone.sql

@@ -0,0 +1,12 @@
+ALTER TABLE schedule ADD COLUMN timezone text;
+UPDATE schedule SET timezone = (
+    SELECT entry.timezone
+    FROM timeperiod_entry entry
+    INNER JOIN timeperiod ON timeperiod.id = entry.timeperiod_id
+    INNER JOIN rotation ON rotation.id = timeperiod.owned_by_rotation_id
+    WHERE rotation.schedule_id = schedule.id
+    ORDER BY entry.id
+    LIMIT 1
+);
+UPDATE schedule SET timezone = 'UTC' WHERE timezone IS NULL;
+ALTER TABLE schedule ALTER COLUMN timezone SET NOT NULL;