Brook.Storage.Postgres.Query.postgres_upsert

You're seeing just the function postgres_upsert, go back to Brook.Storage.Postgres.Query module for more information.
Link to this function

postgres_upsert(conn, view_table, collection, key, value)

View Source

Specs

postgres_upsert(
  conn(),
  schema_table(),
  Brook.view_collection(),
  Brook.view_key(),
  Brook.view_value()
) :: :ok | {:error, Brook.reason()}