Initial commit

sqlscripts/procedures/specific-procedures/unused/procedure-insert_or_update_barcode.sql

@@ -0,0 +1,79 @@
+USE [Database]
+
+IF OBJECT_ID('[Procedures].[insert_or_update_barcode]', 'P') IS NOT NULL
+  DROP PROCEDURE [Procedures].[insert_or_update_barcode];
+GO
+CREATE PROCEDURE [Procedures].[insert_or_update_barcode]
+  @product_id                    AS INT,
+  @barcode_attribute_id          AS INT,
+  @barcode                       AS BIGINT = NULL,
+  @record_id AS INT = NULL OUTPUT
+AS
+  BEGIN TRANSACTION;
+    SET NOCOUNT ON;
+
+	IF @barcode IS NOT NULL AND EXISTS(
+      SELECT *
+      FROM [Tables].[product_values]
+      WHERE [attribute_id] = @barcode_attribute_id
+          AND CAST([value] AS BIGINT) = @barcode
+    )
+    BEGIN;
+	  IF @@TRANCOUNT > 0
+	    ROLLBACK TRANSACTION;
+      THROW 53000, 'The barcode is not unique', 1;
+    END;
+
+	CREATE TABLE [Tables].[#existing_hash_codes](
+      [hash_code] NVARCHAR(13) 
+    );
+    INSERT INTO [#existing_hash_codes]([hash_code])
+    SELECT [value]
+    FROM [Tables].[product_attributes] AS [pa]
+    JOIN [Tables].[product_values] AS [pv]
+       ON [pv].[product_id] = [pa].[product_id]
+          AND [pv].[attribute_id] = [pa].[attribute_id]
+    WHERE [pa].[attribute_id] = @barcode_attribute_id
+    
+	-- begin creating barcode
+    IF @barcode IS NULL
+      EXECUTE [Procedures].[get_next_barcode] @next_barcode = @barcode OUTPUT;
+    
+    WHILE EXISTS(
+      SELECT *
+      FROM [#existing_hash_codes]
+      WHERE CAST([hash_code] AS BIGINT) = @barcode
+    )
+	OR EXISTS(
+	  SELECT *
+      FROM [Tables].[product_values]
+      WHERE [attribute_id] = @barcode_attribute_id
+        AND CAST([value] AS BIGINT) = @barcode
+	)
+    BEGIN
+      SET @barcode += 1;
+    END
+	-- end creating barcode
+
+	IF EXISTS(
+      SELECT *
+      FROM [Tables].[product_values]
+      WHERE [attribute_id] = @barcode_attribute_id
+	    AND [product_id] = @product_id
+	    AND [value] IS NOT NULL
+    ) 
+	BEGIN
+	  UPDATE [Tables].[product_values]
+      SET @record_id = [id],
+	  [value] = [Functions].[to_barcode_ean_13](@barcode)
+	  WHERE [product_id] = @product_id
+	    AND [attribute_id] = @barcode_attribute_id;
+	END
+	ELSE BEGIN
+	  INSERT INTO [Tables].[product_values]([product_id], [attribute_id], [value])
+      VALUES(@product_id, @barcode_attribute_id, [Functions].[to_barcode_ean_13](@barcode));
+      SET @record_id = SCOPE_IDENTITY();
+	END
+    
+    COMMIT TRANSACTION;
+GO