---
title: "refint Extension Removed"
id: contrib-spi-refint
pg_version: "20devel"
---

<a id="contrib-spi-refint"></a>

## O.7. refint Extension Removed

PostgreSQL 19 and below shipped an extension named `refint` (part of the `spi` contrib module) that provided the trigger functions `check_primary_key` and `check_foreign_key` as an early way to enforce referential integrity. This functionality was long superseded by the built-in foreign key mechanism (see [Section 5.5.5](ddl-constraints.md#ddl-constraints-fk)), and the extension was removed in PostgreSQL 20.