if exists (select name from syscolumns where id = object_id('Pub_PlaySaveServer') and name = 'PlayURL')   
begin
  alter table Pub_PlaySaveServer
    alter column PlayURL nvarchar(256) null
end

if exists (select name from syscolumns where id = object_id('Pub_PlaySaveServer') and name = 'URLRoute')   
begin
  alter table Pub_PlaySaveServer
    alter column URLRoute nvarchar(512) null
end

if exists (select name from syscolumns where id = object_id('Pub_PlaySaveServer') and name = 'PlayURLRoute')   
begin
  alter table Pub_PlaySaveServer
    alter column PlayURLRoute nvarchar(512) null
end