From e36a6b94211badaaf868a2082c348a37e65d86e1 Mon Sep 17 00:00:00 2001
From: Masaya Tojo <masaya@tojo.tokyo>
Date: Tue, 28 Feb 2023 23:36:50 +0900
Subject: Add triger function to update a timestamp.

---
 deploy/update_timestamp.sql | 14 ++++++++++++++
 revert/update_timestamp.sql |  7 +++++++
 sqitch.plan                 |  1 +
 verify/update_timestamp.sql |  7 +++++++
 4 files changed, 29 insertions(+)
 create mode 100644 deploy/update_timestamp.sql
 create mode 100644 revert/update_timestamp.sql
 create mode 100644 verify/update_timestamp.sql

diff --git a/deploy/update_timestamp.sql b/deploy/update_timestamp.sql
new file mode 100644
index 0000000..246c57f
--- /dev/null
+++ b/deploy/update_timestamp.sql
@@ -0,0 +1,14 @@
+-- Deploy kakeibo:update_timestamp to pg
+-- requires: appschema
+
+BEGIN;
+
+CREATE OR REPLACE FUNCTION kakeibo.update_timestamp()
+  RETURNS TRIGGER AS $$
+BEGIN
+  NEW.updated_at = NOW();
+  RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+COMMIT;
diff --git a/revert/update_timestamp.sql b/revert/update_timestamp.sql
new file mode 100644
index 0000000..07074ac
--- /dev/null
+++ b/revert/update_timestamp.sql
@@ -0,0 +1,7 @@
+-- Revert kakeibo:update_timestamp from pg
+
+BEGIN;
+
+DROP FUNCTION kakeibo.update_timestamp;
+
+COMMIT;
diff --git a/sqitch.plan b/sqitch.plan
index 9247959..de81c12 100644
--- a/sqitch.plan
+++ b/sqitch.plan
@@ -10,3 +10,4 @@ delete_transaction [transactions appschema] 2023-02-28T12:00:07Z Masaya Tojo <ma
 items [appschema transactions] 2023-02-28T12:08:45Z Masaya Tojo <masaya@tojo.tokyo> # Add items table for tracking individual products in transaction.
 insert_item [appschema items] 2023-02-28T13:13:22Z Masaya Tojo <masaya@tojo.tokyo> # Add function to insert item.
 delete_item [appschema items] 2023-02-28T13:13:39Z Masaya Tojo <masaya@tojo.tokyo> # Add function to delete item.
+update_timestamp [appschema] 2023-02-28T14:30:04Z Masaya Tojo <masaya@tojo.tokyo> # Add triger function to update a timestamp.
diff --git a/verify/update_timestamp.sql b/verify/update_timestamp.sql
new file mode 100644
index 0000000..80fb7db
--- /dev/null
+++ b/verify/update_timestamp.sql
@@ -0,0 +1,7 @@
+-- Verify kakeibo:update_timestamp on pg
+
+BEGIN;
+
+SELECT has_function_privilege('kakeibo.update_timestamp()', 'execute');
+
+ROLLBACK;
-- 
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