Procedure inserts only one record - sql

Question

I have this stored procedure:
CREATE PROCEDURE [dbo].[TVP_OfferPrice] #OfferPriceTVP TVP_OfferPrice READONLY
AS
BEGIN
DECLARE #OfferId INT;
DECLARE #CountryId INT ;
DECLARE #VatRateId INT ;
DECLARE #SalePrice DECIMAL(16, 4) ;
DECLARE #SaleFromDate DATETIME;
DECLARE #SaleToDate DATETIME;
DECLARE #DefaultPrice DECIMAL(16, 4);
DECLARE #Price DECIMAL(16,4);
SELECT
#OfferId = a.OfferId, #CountryId = a.CountryId, #VatRateId = a.VatRateId,
#SalePrice = a.SalePrice, #SaleFromDate = a.SaleFromDate, #SaleToDate = a.SaleToDate,
#DefaultPrice =a.DefaultPrice
FROM
#OfferPriceTVP a;
SET #Price = (SELECT TOP 1 pp.Price
FROM [dbo].[Promotion] p
INNER JOIN [dbo].[PromotionProduct] pp ON pp.ProductId = p.Id
INNER JOIN [dbo].[Offer] do ON do.ProductId = pp.ProductId AND do.Id = #OfferId
INNER JOIN [dbo].[PromotionAssignment] pda ON pda.PromotionId = p.Id AND pda.Id = do.Id
WHERE p.CountryId = #CountryId
AND GETUTCDATE() >= p.ValidFrom AND GETUTCDATE() < p.ValidTo
ORDER BY p.ValidFrom DESC, pp.Price)
IF(#Price IS NULL AND #SalePrice IS NOT NULL AND GETUTCDATE() >= #SaleFromDate AND GETUTCDATE() < #SaleFromDate)
SET #Price = #SalePrice
IF #Price IS NULL
SET #Price = #DefaultPrice
IF NOT EXISTS (SELECT * FROM [dbo].[OfferPrice] dop WHERE dop.OfferId = #OfferId AND dop.CountryId = #CountryId)
INSERT INTO [dbo].[OfferPrice](OfferId, CountryId, VatRateId, Price, DefaultPrice, SalePrice, SaleFromDate, SaleToDate)
SELECT
#OfferId, #CountryId, #VatRateId, #Price, #DefaultPrice,
#SalePrice, #SaleFromDate, #SaleToDate
ELSE
UPDATE b
SET b.VatRateId = #VatRateId, #Price = #Price, b.DefaultPrice = #DefaultPrice,
b.SalePrice = #SalePrice, b.SaleFromDate = #SaleFromDate, b.SaleToDate = #SaleToDate
FROM
[dbo].OfferPrice b
WHERE
b.OfferId = #OfferId AND b.CountryId = #CountryId;
END
and when I try to execute it with some values for example:
DECLARE #OfferPriceTVP AS [dbo].[TVP_DealerOfferPrice]
INSERT INTO #OfferPriceTVP (DealerOfferId, CountryId, VatRateId, DefaultGrossPrice, SaleGrossPrice, SaleFromDate, SaleToDate)
VALUES (10006805, 1, 1, 1, 1, 2, NULL),
(10006806, 1, 1, 2, 1, NULL, NULL),
(10006807, 1, 1, 3, 1, NULL, NULL),
(10006808, 1, 1, 4, 1, NULL, NULL),
(10006809, 1, 1, 5, 1, NULL, NULL),
(10006810, 1, 1, 6, 1, NULL, NULL);
EXEC [dbo].[TVP_DealerOfferPrice] #OfferPriceTVP;
GO
SQL Server shows me that only 1 row gets affected and indeed last value gets only into my table. Any idea why?

Answer 1

Basically, since your variable cannot hold more than one value at the same time, with this statement:
SELECT #OfferId = a.OfferId
,#CountryId = a.CountryId
,#VatRateId = a.VatRateId
,#SalePrice = a.SalePrice
,#SaleFromDate = a.SaleFromDate
,#SaleToDate = a.SaleToDate
,#DefaultPrice = a.DefaultPrice
FROM #OfferPriceTVP a;
you are holding only one record of your input table.
I guess that you are trying to merge the input table with the OfferPrice table. So, you better use the MERGE statement. Here is an example:
MERGE OfferPrice AS TARGET
USING (SELECT VatRateId
,CASE WHEN Price IS NULL AND SalePrice IS NOT NULL AND GETUTCDATE() >= SaleFromDate AND GETUTCDATE() < SaleFromDate THEN SalePrice ELSE DefaultPrice END AS Price
-- And so on and so forth
FROM #OfferPriceTVP) AS SOURCE
ON TARGET.OfferId = SOURCE.OfferId
WHEN MATCHED THEN
UPDATE SET VatRateId = SOURCE.VatRateId
,Price = SOURCE.Price
-- And so on and so forth
WHEN NOT MATCHED THEN
INSERT (OfferId, CountryId) -- And so on and so forth
VALUES (SOURCE.OfferId, SOURCE.CountryId) -- And so on and so forth
More informations here:
MERGE (Transact-SQL)
CASE (Transact-SQL)