is there any development plan by dolphindb to support embedded list as a column in a table ? we need something like the followings: 1. We quickly calculate the cumulative ask/bid qty according to the orderbook and save it to a column . 2. According to the provided qty , we can quickly figure out the corresponding price position on the orderbook and the distance from the price to mid . A simple example, as shown, in this example only 5 levels in the ask volume, in practice, we have 64-128 profile price and volume.