{"id":"appsync-subscription-null-vs-omitted-argument","text":"In AppSync subscriptions, passing `null` as an argument filters for records where the field is unset, while omitting the argument entirely means no filtering on that field.","truth_value":"IN","source":"entries/2026/03/11/appsync-latest-devguide-aws-appsync-real-time-datahtml.md","source_url":"","source_hash":"9ebcb5bfd81ee816","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"appsync-subscription-null-vs-omitted-argument","truth_value":"IN","reason":"premise"}]}}