MSSQL Migration: CreatorID in InventoryItems changed to VARCHAR(36)

Again, the same thing about potentially having non-GUID CreatorID.
soprefactor
AlexRa 2010-05-23 11:34:56 +03:00
parent 89b7c64b6f
commit 52a3dbd076
1 changed files with 70 additions and 0 deletions

View File

@ -171,4 +171,74 @@ CREATE NONCLUSTERED INDEX folder ON dbo.inventoryitems
COMMIT COMMIT
:VERSION 5
# It would be totally crazy to have to recreate the whole table just to change one column type,
# just because MS SQL treats each DEFAULT as a constraint object that must be dropped
# before anything can be done to the column. Since all defaults here are unnamed, there is
# no easy way to drop them! The hairy piece of code below removes all DEFAULT constraints
# from InventoryItems.
# SO: anything that's NULLable is by default NULL, so please don't declare DEFAULT(NULL),
# they do nothing but prevent changes to the columns. If you really
# need to have DEFAULTs or other constraints, give them names so they can be dropped when needed!
BEGIN TRANSACTION
DECLARE @nm varchar(80);
DECLARE x CURSOR LOCAL FORWARD_ONLY READ_ONLY
FOR SELECT name FROM sys.default_constraints where parent_object_id = OBJECT_ID('inventoryitems');
OPEN x;
FETCH NEXT FROM x INTO @nm;
WHILE @@FETCH_STATUS = 0
BEGIN
EXEC('alter table inventoryitems drop ' + @nm);
FETCH NEXT FROM x INTO @nm;
END
CLOSE x
DEALLOCATE x
COMMIT
# all DEFAULTs dropped!
:GO
BEGIN TRANSACTION
# Restoring defaults:
# NOTE: [inventoryID] does NOT need one: it's NOT NULL PK and a unique Guid must be provided every time anyway!
alter table inventoryitems
add constraint def_baseperm default 0 for inventoryBasePermissions
alter table inventoryitems
add constraint def_allperm default 0 for inventoryEveryOnePermissions
alter table inventoryitems
add constraint def_grpperm default 0 for inventoryGroupPermissions
COMMIT
:VERSION 7
BEGIN TRANSACTION
# CreatorID goes back to VARCHAR(36) (???)
exec sp_rename 'inventoryitems.CreatorID', 'cr_old', 'COLUMN'
:GO
alter table inventoryitems
add creatorID varchar(36) NULL
:GO
update inventoryitems set creatorID = CONVERT(VARCHAR(36), cr_old)
alter table inventoryitems
drop column cr_old
COMMIT