“Must declare the table variable ”@name“” in stored procedure

Question

I have a procedure which returns the error:

Must declare the table variable \"@PropIDs\".

But it is followed with the message:

Answer 1

The issue is that you're mixing up dynamic SQL with non-dynamic SQL.

Firstly - the reason it works when you put NULL into @NotNeededWPRNs is because when that variable is NULL, your @ProductsSQL becomes NULL.

WHat you need to do is either make your @PropsIDs table a non-table variable and either a temporary table or a physical table. OR you need to wrap everything in dynamic SQL and execute it.

So the easy way is to do something like this:

Declare @ProductsSQL nvarchar(max);
    SET @ProductsSQL = '
    DECLARE @PropIDs TABLE
    (ID bigint)
    Insert into @PropIDs (ID) 
    SELECT [WPRN] FROM [dbo].[Properties] WHERE(WPRN in (' + @NotNeededWPRNs + '))

    SELECT  p.WPRN AS ID,
    p.Address  AS Address,
    p.Address AS Street
      FROM [dbo].[Properties] AS p
    WHERE 
       p.WPRN NOT IN( SELECT ID FROM @PropIDs)
    '

and execute that. OR as mentioned - change @ProdIDs to a temporary table. (The route you're approaching in the CREATE #ProdIds, but then you need to use #ProdIDs instead of @ProdIDs everywhere in the sproc).