How to pass a temp table as a parameter into a separate stored procedure

Question

I have a stored procedure that takes an input parameter @CategoryKeys varchar, and parses its contents into a temp table, #CategoryKeys.

Answer 1

When you create a #TEMP table, the "scope" is bigger than just the procedure it is created in.

Below is a sample:

IF EXISTS 
    (
    SELECT * FROM INFORMATION_SCHEMA.ROUTINES
    WHERE ROUTINE_TYPE = N'PROCEDURE' and ROUTINE_SCHEMA = N'dbo' and ROUTINE_NAME = N'uspProc002'  
    )
BEGIN
    DROP PROCEDURE [dbo].[uspProc002]
END


GO

CREATE Procedure dbo.uspProc002 
AS

BEGIN

/* Uncomment this code if you want to be more explicit about bad "wiring" */
/*
IF OBJECT_ID('tempdb..#TableOne') IS NULL
begin
        THROW 51000, 'The procedure expects a temp table named #TableOne to already exist.', 1;  
end
*/

    /* Note, I did not Create #TableOne in this procedure.  It "pre-existed".  An if check will ensure that it is there.  */
    IF OBJECT_ID('tempdb..#TableOne') IS NOT NULL
    begin
        Insert into #TableOne ( SurrogateKey , NameOf ) select 2001, 'uspProc002'
    end

END


GO



IF EXISTS 
    (
    SELECT * FROM INFORMATION_SCHEMA.ROUTINES
    WHERE ROUTINE_TYPE = N'PROCEDURE' and ROUTINE_SCHEMA = N'dbo' and ROUTINE_NAME = N'uspProc001'  
    )
BEGIN
    DROP PROCEDURE [dbo].[uspProc001]
END


GO

CREATE Procedure dbo.uspProc001 (
@Param1 int
)
AS

BEGIN


    IF OBJECT_ID('tempdb..#TableOne') IS NOT NULL
    begin
            drop table #TableOne
    end


    CREATE TABLE #TableOne
    ( 
    SurrogateKey int , 
    NameOf varchar(12)
    )

    Insert into #TableOne ( SurrogateKey , NameOf ) select 1001, 'uspProc001'

    Select * from #TableOne

    EXEC dbo.uspProc002 

    Select * from #TableOne

    IF OBJECT_ID('tempdb..#TableOne') IS NOT NULL
    begin
            drop table #TableOne
    end


END


GO




exec dbo.uspProc001 0

HAVING SAID THAT, PLEASE DO NOT CODE UP ALOT OF THESE. ITS THE SQL EQUIVALENT OF A GLOBAL VARIABLE AND IT IS DIFFICULT TO MAINTAIN AND BUG PRONE.