Did you generate the migration for it?
For example, here is mine adding that function:
defmodule Core.Repo.Migrations.InstallAshFunctionsExtension420240925162123 do
@moduledoc """
Installs any extensions that are mentioned in the repo's `installed_extensions/0` callback
This file was autogenerated with `mix ash_postgres.generate_migrations`
"""
use Ecto.Migration
def up do
execute("""
CREATE OR REPLACE FUNCTION uuid_generate_v7()
RETURNS UUID
AS $$
DECLARE
timestamp TIMESTAMPTZ;
microseconds INT;
BEGIN
timestamp = clock_timestamp();
microseconds = (cast(extract(microseconds FROM timestamp)::INT - (floor(extract(milliseconds FROM timestamp))::INT * 1000) AS DOUBLE PRECISION) * 4.096)::INT;
RETURN encode(
set_byte(
set_byte(
overlay(uuid_send(gen_random_uuid()) placing substring(int8send(floor(extract(epoch FROM timestamp) * 1000)::BIGINT) FROM 3) FROM 1 FOR 6
),
6, (b'0111' || (microseconds >> 8)::bit(4))::bit(8)::int
),
7, microseconds::bit(8)::int
),
'hex')::UUID;
END
$$
LANGUAGE PLPGSQL
VOLATILE;
""")
execute("""
CREATE OR REPLACE FUNCTION timestamp_from_uuid_v7(_uuid uuid)
RETURNS TIMESTAMP WITHOUT TIME ZONE
AS $$
SELECT to_timestamp(('x0000' || substr(_uuid::TEXT, 1, 8) || substr(_uuid::TEXT, 10, 4))::BIT(64)::BIGINT::NUMERIC / 1000);
$$
LANGUAGE SQL
IMMUTABLE PARALLEL SAFE STRICT;
""")
end
def down do
# Uncomment this if you actually want to uninstall the extensions
# when this migration is rolled back:
execute("DROP FUNCTION IF EXISTS uuid_generate_v7(), timestamp_from_uuid_v7(uuid)")
end
end
