CREATE TABLE IF NOT EXISTS ingredient
  ( product_id INTEGER NOT NULL PRIMARY KEY -- https://handlaprivatkund.ica.se/stores/1004247/api/v4/products/bop?retailerProductId=...
  );

CREATE TABLE IF NOT EXISTS ingredient_data
  ( product_id INTEGER REFERENCES ingredient(product_id)
  , name TEXT NOT NULL
  , cost_per_kg REAL NOT NULL
  , cost_per_unit REAL NOT NULL
  , image BYTEA NOT NULL
  );