2 files changed, 16 insertions, 0 deletions
diff --git a/migrations/2018-04-14-145711_create_index_view/down.sql b/migrations/2018-04-14-145711_create_index_view/down.sql
new file mode 100644
index 000000000000..87d26820f7e2
--- /dev/null
+++ b/migrations/2018-04-14-145711_create_index_view/down.sql
@@ -0,0 +1 @@
+DROP VIEW thread_index;
diff --git a/migrations/2018-04-14-145711_create_index_view/up.sql b/migrations/2018-04-14-145711_create_index_view/up.sql
new file mode 100644
index 000000000000..3b7ddc1d647a
--- /dev/null
+++ b/migrations/2018-04-14-145711_create_index_view/up.sql
@@ -0,0 +1,15 @@
+-- Create a simple view that returns the list of threads ordered by
+-- the last post that occured in the thread.
+
+CREATE VIEW thread_index AS
+  SELECT t.id AS thread_id,
+         t.title AS title,
+         t.author_name AS author_name,
+         t.posted AS posted,
+         p.id AS post_id
+    FROM threads t
+    JOIN (SELECT DISTINCT ON (thread_id) id, thread_id
+          FROM posts
+          ORDER BY thread_id, id DESC) AS p
+    ON t.id = p.thread_id
+    ORDER BY p.id DESC;