Last tested: Oct 21, 2019
When you use from and view_name together, from tells Looker what view to actually pull from and view_name can literally be anything. (per Paola)
So for example, say we have something like this:
explore: extension_hidden { extension: required
view_name: any_name_that_i_want
join: products {
sql_on: ${products.id} = ${any_name_that_i_want.id} ;;
type: left_outer
relationship: one_to_one
}
}
explore: order_items_3 {
extends: [extension_hidden]
from: orders}
The SQL generated in the UI will look like this:
SELECT
any_name_that_i_want.id AS `any_name_that_i_want.id`,
products.brand AS `products.brand`
FROM demo_db.orders AS any_name_that_i_want
LEFT JOIN demo_db.products AS products ON products.id = any_name_that_i_want.id
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