SQL MERGE Table with tableName - sql

Question

I would like have a generic procedure to Update my look Up Table.
CREATE TYPE S_Reference.[ReferenceType] as TABLE (
[Id] SMALLINT NOT NULL PRIMARY KEY,
[Code] VARCHAR(16) UNIQUE NOT NULL,
[Rank] SMALLINT NOT NULL CHECK([Rank]>0),
[Description] VARCHAR(128) NOT NULL,
[Base] BIT NOT NULL DEFAULT 0);
GO
CREATE PROCEDURE [S_Reference].[P_B_ReferenceMerge]
#Values [ReferenceType] READONLY,
#TableName NVARCHAR(50)
AS
DECLARE #SQLQuery NVARCHAR(200)
SET #SQLQuery = 'SELECT * FROM ' + #TableName
MERGE INTO #SQLQuery Ori
USING
#Values New
ON (Ori.[Id] = New.[Id])
WHEN MATCHED THEN
UPDATE
SET Ori.[Code] = New.[Code],
Ori.[Rank] = New.[Rank],
Ori.[Description] = New.[Description],
Ori.[Base] = New.[Base]
WHEN NOT MATCHED THEN
INSERT (Ori.[Id] , Ori.[Code], Ori.[Rank],Ori.[Description] ,Ori.[Base])
Values (New.[Id] , New.[Code], New.[Rank],New.[Description] ,New.[Base]);
RETURN 0
But I don't know how to use the "tableName" ?
I get an error on Ori.[Id], I think the problem comes from
SET #SQLQuery = 'SELECT * FROM ' + #TableName
MERGE INTO #SQLQuery Ori

Answer 1

If can help this is how I did. By this way You can manage easily the values in your look up (reference or enum in c#).
First the procedure:
CREATE TYPE S_Reference.[ReferenceType] AS TABLE (
[Id] SMALLINT NOT NULL PRIMARY KEY,
[Code] VARCHAR(40) UNIQUE NOT NULL,
[Rank] SMALLINT UNIQUE NOT NULL CHECK([Rank]>0),
[Description] VARCHAR(128) NOT NULL,
[Base] BIT NOT NULL DEFAULT 0);
GO
CREATE PROCEDURE [S_Reference].[P_M_ReferenceMerge]
#Values S_Reference.[ReferenceType] READONLY,
#TableName NVARCHAR(50)
AS
CREATE TABLE #NewValues (
[Id] SMALLINT NOT NULL PRIMARY KEY,
[Code] VARCHAR(40) UNIQUE NOT NULL,
[Rank] SMALLINT UNIQUE NOT NULL CHECK([Rank]>0),
[Description] VARCHAR(128) NOT NULL,
[Base] BIT NOT NULL DEFAULT 0);
Insert INTO #NewValues
select * From #Values
DECLARE #SQLQuery NVARCHAR(MAX)
SET #SQLQuery =
'DELETE
FROM ' + #TableName + '
WHERE [Id] IN (SELECT [Id]
FROM ' + #TableName + '
EXCEPT
SELECT [Id]
FROM #NewValues)
MERGE INTO ' + #TableName + ' Ori
USING #NewValues New
ON (Ori.[Id] = New.[Id])
WHEN MATCHED THEN
UPDATE
SET Ori.[Code] = New.[Code],
Ori.[Rank] = New.[Rank],
Ori.[Description] = New.[Description],
Ori.[Base] = New.[Base]
WHEN NOT MATCHED THEN
INSERT ([Id] , [Code], [Rank], [Description] ,[Base])
Values (New.[Id] , New.[Code], New.[Rank], New.[Description] ,New.[Base]);'
EXEC sp_executesql #SQLQuery
RETURN 0
Usage
INSERT INTO
#VALUES([Id],[Code],[Rank],[Description] ,[Base])
Values
(1,'EUR',1,'EUR',0),
(2,'GBP',2,'GBP',0),
(3,'USD',3,'USD',0)
EXEC [S_Reference].[P_M_ReferenceMerge]
#Values = #VALUES,
#TableName = 'S_Reference.T_R_Currency'
DELETE FROM #VALUES