Re: Data model question regarding usage of arrays.

Solution

CREATE TABLE ingredients
(
    uid integer,
    ...     -- nutritional info
)

CREATE TABLE recipes
(
   uid integer,
   uid_bridge integer -- uids in bridge table
)

CREATE TABLE bridge
(
   uid integer,
   uid_ingredients integer -- uids in table ingredients
)

rows in recipes table can be unique for each recipe, rows in
bridge table are a row per recipe per ingredient in that recipe.