How to read a variable defined in dbt_project.yml to a dbt .sql model configuration

Question

How can we refer a variable defined in dbt_project.yml to a sql dbt model

vars:
  schema_name: "PUB"

The dbt .sql model code in which i want to refer this variable is in quoted between asterick below:

{{
  config(
      database= 'RND',
      schema= *schema_name*
  )
}}

Answer 1

If you want to specify it one file at a time, you can do the following.

{{
  config(
      database= 'RND',
      schema= var('schema_name')
  )
}}