Add new vendors, brands, categories tables and calculate scripts

inventory-server/db/config-schema-new.sql

@@ -1,3 +1,21 @@
+-- Create function for updating timestamps if it doesn't exist
+CREATE OR REPLACE FUNCTION update_updated_column()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated = CURRENT_TIMESTAMP;
+    RETURN NEW;
+END;
+$$ language 'plpgsql';
+
+-- Create function for updating updated_at timestamps
+CREATE OR REPLACE FUNCTION update_updated_at_column()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = CURRENT_TIMESTAMP;
+    RETURN NEW;
+END;
+$$ language 'plpgsql';
+
 -- Drop tables in reverse order of dependency
 DROP TABLE IF EXISTS public.settings_product CASCADE;
 DROP TABLE IF EXISTS public.settings_vendor CASCADE;