Push down optimizations in the query at the subquery level

[paoliniluis]

Is your feature request related to a problem? Please describe.
The way we do nested questions keeps the fields of the subqueries static, but on columnar databases we should be only picking the columns we're using in the top level query

Describe the solution you'd like
If we're using columnar DB's, instead of

SELECT
  "source"."id" AS "id",
  "source"."rating" AS "rating",
  "source"."rating_mapped" AS "rating_mapped",
  "source"."body" AS "body"
FROM
  (
    SELECT
      "public"."feedback"."id" AS "id",
      "public"."feedback"."account_id" AS "account_id",
      "public"."feedback"."email" AS "email",
      "public"."feedback"."date_received" AS "date_received",
      "public"."feedback"."rating" AS "rating",
      "public"."feedback"."rating_mapped" AS "rating_mapped",
      "public"."feedback"."body" AS "body"
    FROM
      "public"."feedback"
  ) AS "source"
LIMIT
  1048575

the query should be

SELECT
  "source"."id" AS "id",
  "source"."rating" AS "rating",
  "source"."rating_mapped" AS "rating_mapped",
  "source"."body" AS "body"
FROM
  (
    SELECT
      "public"."feedback"."id" AS "id",
      "public"."feedback"."rating" AS "rating",
      "public"."feedback"."rating_mapped" AS "rating_mapped",
      "public"."feedback"."body" AS "body"
    FROM
      "public"."feedback"
  ) AS "source"
LIMIT
  1048575

Describe alternatives you've considered
None

How important is this feature to you?
NA

Additional context
NA