From 164ea9a6c87ddc5203ea2343d3c139f9a42b5fbe Mon Sep 17 00:00:00 2001
From: Masahiko AMANO <hiko-19@ya.ru>
Date: Thu, 3 Jul 2025 16:18:44 +0300
Subject: [PATCH] feat(db): add `uuid_extract_timestamp` function

---
 database/create-schema.sql | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/database/create-schema.sql b/database/create-schema.sql
index eaa8c70..8df50e7 100644
--- a/database/create-schema.sql
+++ b/database/create-schema.sql
@@ -80,6 +80,20 @@ CREATE EXTENSION IF NOT EXISTS "uuid-ossp" WITH SCHEMA public;
 COMMENT ON EXTENSION "uuid-ossp" IS 'generate universally unique identifiers (UUIDs)';
 
 
+--
+-- Name: uuid_extract_timestamp(uuid); Type: FUNCTION; Schema: public; Owner: -
+--
+
+CREATE FUNCTION public.uuid_extract_timestamp(uuid_val uuid) RETURNS timestamp with time zone
+    LANGUAGE sql IMMUTABLE
+    AS $$
+    SELECT to_timestamp(
+        ('x' || LEFT(REPLACE(uuid_val::TEXT, '-', ''), 12))::BIT(48)::BIGINT
+        / 1000.0
+    );
+$$;
+
+
 --
 -- Name: uuid_v7(timestamp with time zone); Type: FUNCTION; Schema: public; Owner: -
 --