-- +goose Up
-- +goose StatementBegin
CREATE FUNCTION immutable_array_to_string(arr ANYARRAY, sep TEXT)
RETURNS text
AS $$
    SELECT array_to_string(arr, sep);
$$
LANGUAGE SQL
IMMUTABLE;
-- +goose StatementEnd

-- +goose Down
-- +goose StatementBegin
DROP FUNCTION IF EXISTS immutable_array_to_string;
-- +goose StatementEnd