BigQueryでコメント付きのテーブルをCREATE TABLE文で作る

CREATE OR REPLACE TABLE `my_dataset.my_table` (
  date DATE NOT NULL OPTIONS(description="集計日"),
  user_id STRING OPTIONS(description="ユーザーID"),
  item STRUCT<
    item_id STRING OPTIONS(description="商品ID"),
    item_id STRING OPTIONS(description="商品名"),
    price INTEGER OPTIONS(description="金額"),
  > OPTIONS(description="購入商品"),
  created_at DATETIME DEFAULT CURRENT_DATETIME("Asia/Tokyo") OPTIONS(description="作成日時")
)
PARTITION BY date
OPTIONS(description="購入履歴");