USE Northgale
go
CREATE PROCEDURE search_orders_1
                 @orderid     int           = NULL,
                 @status      char(1)       = NULL,
                 @fromdate    date          = NULL,
                 @todate      date          = NULL,
                 @minprice    decimal(10,2) = NULL,
                 @maxprice    decimal(10,2) = NULL,
                 @custid      nchar(5)      = NULL,
                 @custname    nvarchar(40)  = NULL,
                 @city        nvarchar(25)  = NULL,
                 @region      nvarchar(15)  = NULL,
                 @country     nvarchar(15)  = NULL,
                 @prodid      int           = NULL,
                 @prodname    nvarchar(40)  = NULL,
                 @employeestr varchar(MAX)  = NULL,
                 @employeetbl intlist_tbltype READONLY AS

DECLARE @hasemptbl bit = CASE WHEN EXISTS (SELECT * FROM @employeetbl)
                              THEN 1
                              ELSE 0
                         END

SELECT o.OrderID, o.OrderDate, o.EmployeeID, o.Status,
       c.CustomerID, c.CustomerName, c.Address, c.City, c.Region,
       c.PostalCode, c.Country, c.Phone, od.UnitPrice, od.Quantity,
       p.ProductID, p.ProductName, p.UnitsInStock, p.UnitsOnOrder
FROM   Orders o
JOIN   [Order Details] od ON o.OrderID = od.OrderID
JOIN   Customers c ON o.CustomerID = c.CustomerID
JOIN   Products p ON p.ProductID = od.ProductID
WHERE  (o.OrderID = @orderid OR @orderid IS NULL)
  AND  (o.Status = @status OR @status IS NULL)
  AND  (o.OrderDate >= @fromdate OR @fromdate IS NULL)
  AND  (o.OrderDate <= @todate OR @todate IS NULL)
  AND  (od.UnitPrice >= @minprice OR @minprice IS NULL)
  AND  (od.UnitPrice <= @maxprice OR @maxprice IS NULL)
  AND  (o.CustomerID = @custid OR @custid IS NULL)
  AND  (c.CustomerName LIKE @custname + '%' OR @custname IS NULL)
  AND  (c.City = @city OR @city IS NULL)
  AND  (c.Region = @region OR @region IS NULL)
  AND  (c.Country = @country OR @country IS NULL)
  AND  (od.ProductID = @prodid OR @prodid IS NULL)
  AND  (p.ProductName LIKE @prodname + '%' OR @prodname IS NULL)
  AND  (o.EmployeeID IN (SELECT n FROM intlist_to_tbl(@employeestr)) OR
        @employeestr IS NULL)
  AND  (o.EmployeeID IN (SELECT val FROM @employeetbl) OR @hasemptbl = 0)
ORDER  BY o.OrderID
OPTION (RECOMPILE)