- Fix error in MSSQL DDL scripts (#1487112): use trigger instead of foreign key constraint

CHANGELOG

@@ -71,6 +71,7 @@ CHANGELOG Roundcube Webmail
 - jQuery 1.4.4
 - Fix handling of HTML entity strings in plain text messages
 - Fix focused elements aren't unfocused when clicking on the list (#1487123)
+- Fix error in MSSQL DDL scripts (#1487112)
 
 RELEASE 0.4.2
 -------------

SQL/mssql.initial.sql

@@ -291,8 +291,11 @@ ALTER TABLE [dbo].[contactgroupmembers] ADD CONSTRAINT [FK_contactgroupmembers_c
     ON DELETE CASCADE ON UPDATE CASCADE
 GO
 
-ALTER TABLE [dbo].[contactgroupmembers] ADD CONSTRAINT [FK_contactgroupmembers_contact_id] 
-    FOREIGN KEY ([contact_id]) REFERENCES [dbo].[contacts] ([contact_id])
-    ON DELETE CASCADE ON UPDATE CASCADE
+-- Use trigger instead of foreign key (#1487112)
+-- "Introducing FOREIGN KEY constraint ... may cause cycles or multiple cascade paths."
+CREATE TRIGGER [contact_delete_member] ON [dbo].[contacts]
+    AFTER DELETE AS
+    DELETE FROM [dbo].[contactgroupmembers]
+    WHERE [contact_id] IN (SELECT [contact_id] FROM deleted)
 GO
 

SQL/mssql.upgrade.sql

@@ -77,9 +77,10 @@ ALTER TABLE [dbo].[contactgroupmembers] ADD CONSTRAINT [FK_contactgroupmembers_c
     ON DELETE CASCADE ON UPDATE CASCADE
 GO
 
-ALTER TABLE [dbo].[contactgroupmembers] ADD CONSTRAINT [FK_contactgroupmembers_contact_id] 
-    FOREIGN KEY ([contact_id]) REFERENCES [dbo].[contacts] ([contact_id])
-    ON DELETE CASCADE ON UPDATE CASCADE
+CREATE TRIGGER [contact_delete_member] ON [dbo].[contacts]
+    AFTER DELETE AS
+    DELETE FROM [dbo].[contactgroupmembers]
+    WHERE [contact_id] IN (SELECT [contact_id] FROM deleted)
 GO
 
 ALTER TABLE [dbo].[contactgroups] ADD CONSTRAINT [FK_contactgroups_user_id]