The "missing" `item_name` is probably because "`item_name text, item_id int`" (where I've used backticks to enclose "code") got rendered as " item_name text, item_id int" (plain-text where underscore means "italic") in your post.
The "missing" `item_name` is probably because "`item_name text, item_id int`" (where I've used backticks to enclose "code") got rendered as " item_name text, item_id int" (plain-text where underscore means "italic") in your post.