identity column

supabase/migrations/20240409190001_bus_funcs.sql

@@ -6,10 +6,11 @@ CREATE EXTENSION IF NOT EXISTS "pg_net" SCHEMA extensions;
 -- request ID is inserted by first cron job,
 -- then second cron job updates from net._http_response table.
 create table if not exists raw_bus_positions (
-  request_id int not null,
-  created timestamp with time zone not null default now(),
-  response_status int null,
-  response_json jsonb null
+  id BIGINT GENERATED ALWAYS AS IDENTITY,
+  request_id INT not null,
+  created TIMESTAMP WITH TIME ZONE not null default now(),
+  response_status INT null,
+  response_json JSONB null
 );
 
 -- used to help craft the API URL. Requires plv8 extension.