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Shared/IdentNrGuppirung_Trigger.sql

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+SET ANSI_NULLS ON
+GO
+
+SET QUOTED_IDENTIFIER ON
+GO
+
+-- =============================================
+-- Author:		Stoyan Zlatev
+-- Create date: 13-04-2023
+-- Description:	That trigger should update IdentNrGruppierung, IdentNr_Gruppendetails
+--				when a group whit name (WPD [Nennweite] / [Temperatur]°)
+--				dose not exists in the IdentNr_Gruppendetails table.
+-- Update:		26-04-2023 - @GroupTyp added. 
+--				The GroupTyp will be determinated in CASE WHEN ... query 
+--				and later used for updates on [IdentNr_Gruppendetail] and [IdentNrGruppierung]
+-- =============================================
+ALTER TRIGGER [TRG_AfterInsert_UpdateIdentNrGrouping] 
+ON [dbo].[Identnr] 
+AFTER INSERT
+AS 
+BEGIN
+	-- SET NOCOUNT ON added to prevent extra result sets from interfering with SELECT statements.
+	SET NOCOUNT ON;
+
+	DECLARE @IdentNr INT;
+	DECLARE @Nennweite INT;
+	DECLARE @Temperatur INT;
+	DECLARE @Typ VARCHAR(20);
+	DECLARE @GroupId INT;
+	DECLARE @GroupName VARCHAR(MAX);
+	DECLARE @GroupTyp VARCHAR(20);
+
+	-- setting declared field from inserted table 
+	SELECT @IdentNr		= [IdentNr] 
+		 , @Nennweite	= [Nennweite] 
+		 , @Temperatur	= [Temperatur] 
+		 , @Typ			= [Typ] 
+	  FROM [inserted];
+
+	SET @GroupTyp = (CASE WHEN @Typ LIKE '%WPD%' THEN 'WPD'
+						  WHEN @Typ LIKE '%WPF%' THEN 'WPF'
+						  WHEN @Typ LIKE '%WSD%' THEN 'WSD'
+					 ELSE NULL END);
+
+	IF @GroupTyp IS NOT NULL
+	BEGIN
+		-- creating a group name from declared values "@GroupTyp [Nennweite] / [Temperatur]°"
+		SET @GroupName = @GroupTyp 
+					   + ' '
+					   + CASE WHEN @Nennweite	IS NOT NULL THEN CAST(@Nennweite	AS VARCHAR(5)) ELSE '0'	END 
+					   + ' / '
+					   + CASE WHEN @Temperatur	IS NOT NULL THEN CAST(@Temperatur	AS VARCHAR(5)) ELSE '0'	END
+					   + '°';
+
+		-- getting next group id
+		SET @GroupId = (SELECT TOP 1 [ID] 
+						  FROM [IdentNr_Gruppendetail] 
+						 WHERE [Name] = @GroupName);
+
+		-- case the group name dose not exist into [IdentNr_Gruppendetail] will be inserted.
+		IF @GroupId IS NULL
+		BEGIN
+			SET @GroupId = (SELECT MAX([ID]) FROM [IdentNr_Gruppendetail]) + 1;
+
+			INSERT INTO [IdentNr_Gruppendetail] ([ID], [Name])
+			VALUES (@GroupId, @GroupName)
+		END;
+	
+		-- case the @IdentNr dose not exist [IdentNrGruppierung] will be mapped.
+		IF (SELECT COUNT(1) FROM [IdentNrGruppierung] WHERE [IdentNr] = @IdentNr) = 0
+		BEGIN
+			   SET IDENTITY_INSERT [IdentNrGruppierung] ON;
+			INSERT INTO [IdentNrGruppierung] ([IdentNr], [GruppenID], [ID])
+			VALUES (@IdentNr, @GroupId, (SELECT MAX([ID]) FROM [IdentNrGruppierung]) + 1)
+			   SET IDENTITY_INSERT [IdentNrGruppierung] OFF;
+		END;
+	END;
+END
+GO