1. PostgreSQL copy of all MySQL created and tested.\n 2. Purchase Orders and Sales Orders and stock level management added to MySQL, PostgreSQL, and server and front end code.

static/MySQL/314_tri_Shop_Variation.sql

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+
+# Shop Variation
+
+USE PARTSLTD_PROD;
+
+DROP TRIGGER IF EXISTS before_insert_Shop_Variation;
+DROP TRIGGER IF EXISTS before_update_Shop_Variation;
+
+
+DELIMITER //
+CREATE TRIGGER before_insert_Shop_Variation
+BEFORE INSERT ON Shop_Variation
+FOR EACH ROW
+BEGIN
+	SET NEW.created_on = NOW();
+    SET NEW.created_by = CURRENT_USER();
+END //
+DELIMITER ;
+
+
+DELIMITER //
+CREATE TRIGGER before_update_Shop_Variation
+BEFORE UPDATE ON Shop_Variation
+FOR EACH ROW
+BEGIN
+	IF OLD.id_change_set <=> NEW.id_change_set THEN
+		SIGNAL SQLSTATE '45000'
+        SET MESSAGE_TEXT = 'New change Set ID must be provided.';
+    END IF;
+    
+    INSERT INTO Shop_Variation_Audit (
+		id_variation,
+        name_field,
+        value_prev,
+        value_new,
+        id_change_set
+    )
+    # Changed code
+	SELECT NEW.id_variation, 'code', OLD.code, NEW.code, NEW.id_change_set
+		WHERE NOT OLD.code <=> NEW.code
+    UNION
+    # Changed name
+	SELECT NEW.id_variation, 'name', OLD.name, NEW.name, NEW.id_change_set
+		WHERE NOT OLD.name <=> NEW.name
+	UNION
+	# Changed active
+	SELECT NEW.id_variation, 'active', CONVERT(CONVERT(OLD.active, SIGNED), CHAR), CONVERT(CONVERT(NEW.active, SIGNED), CHAR), NEW.id_change_set
+		WHERE NOT (OLD.active <=> NEW.active)
+	UNION
+	# Changed display_order
+	SELECT NEW.id_variation, 'display_order', CONVERT(OLD.display_order, CHAR), CONVERT(NEW.display_order, CHAR), NEW.id_change_set
+		WHERE NOT (OLD.display_order <=> NEW.display_order)
+    ;
+END //
+DELIMITER ;