From 5e8508e0250545e7deb6e62d4ec51aec575d1af1 Mon Sep 17 00:00:00 2001
From: Hongbo Wu <hongbo@omnivore.app>
Date: Wed, 27 Jul 2022 21:38:52 +0800
Subject: [PATCH] Add position column in labels table

---
 .../0090.do.add_position_to_labels.sql        | 25 +++++++++++++++++++
 .../0090.undo.add_position_to_labels.sql      |  9 +++++++
 2 files changed, 34 insertions(+)
 create mode 100755 packages/db/migrations/0090.do.add_position_to_labels.sql
 create mode 100755 packages/db/migrations/0090.undo.add_position_to_labels.sql

diff --git a/packages/db/migrations/0090.do.add_position_to_labels.sql b/packages/db/migrations/0090.do.add_position_to_labels.sql
new file mode 100755
index 000000000..a1790d4d6
--- /dev/null
+++ b/packages/db/migrations/0090.do.add_position_to_labels.sql
@@ -0,0 +1,25 @@
+-- Type: DO
+-- Name: add_position_to_labels
+-- Description: Add position column to labels table
+
+BEGIN;
+
+ALTER TABLE omnivore.labels ADD COLUMN position INTEGER NOT NULL DEFAULT 0;
+
+WITH positions AS (
+    SELECT
+        id, row_number() OVER (PARTITION BY user_id ORDER BY name) as row_num
+    FROM
+        omnivore.labels
+) UPDATE
+      omnivore.labels
+  SET
+      position = positions.row_num
+  FROM
+      positions
+  WHERE
+      omnivore.labels.id = positions.id;
+
+ALTER TABLE omnivore.labels ADD constraint labels_position_user_id_unique UNIQUE(user_id, position);
+
+COMMIT;
diff --git a/packages/db/migrations/0090.undo.add_position_to_labels.sql b/packages/db/migrations/0090.undo.add_position_to_labels.sql
new file mode 100755
index 000000000..a1eff4384
--- /dev/null
+++ b/packages/db/migrations/0090.undo.add_position_to_labels.sql
@@ -0,0 +1,9 @@
+-- Type: UNDO
+-- Name: add_position_to_labels
+-- Description: Add position column to labels table
+
+BEGIN;
+
+ALTER TABLE omnivore.labels DROP COLUMN IF EXISTS position;
+
+COMMIT;