CTE无法使用额外的join子句

Question

Can someone tell me why this returns 0 records when I add the extra join information for [PropertyId]? I know this is something simple but, I'm at a loss.

declare @ViewId as int;

set @ViewId = 11;

with Views
as
(
    select [LiveWireView].[Id], [LiveWireView].[Name], [LiveWireView].[ParentId], [PropertyToViewMap].[PropertyId]
    from [LiveWireView]
    inner join [PropertyToViewMap] on [PropertyToViewMap].[ViewId] = [LiveWireView].[Id]
    where [LiveWireView].[Id] = @ViewId
    union all
    select [v].[Id], [v].[Name], [v].[ParentId], [p].[PropertyId]
    from [LiveWireView] v
    inner join [PropertyToViewMap] p on [p].[ViewId] = [v].[Id]
    inner join Views on Views.Id = v.ParentId
)

select [PropertyId] from Views;

Answer 1

If you added this join:

inner join [PropertyToViewMap] p on [p].[ViewId] = [v].[Id]

And are no longer getting results, I think it's same to say that there are no records that meet these conditions. You could test this by converting it to a LEFT JOIN and seeing if you get a null value for PropertyId