Merge tag '0.9.17'

Hollo 0.9.17

Author: dahlia

CHANGES.md

@@ -80,6 +80,35 @@ To be released.
 [#549]: https://github.com/fedify-dev/hollo/issues/549
 
 
+Version 0.9.17
+--------------
+
+Released on August 30, 2026.
+
+ -  Fixed status URL searches timing out on installations with large posts
+    tables by adding a partial hash index on `posts.url`.  On large
+    installations, create the index before upgrading to avoid blocking writes
+    during the automatic migration:
+
+    ~~~~ sql
+    CREATE INDEX CONCURRENTLY posts_url_index
+    ON posts USING hash (url)
+    WHERE url IS NOT NULL;
+    ~~~~
+
+    If this concurrent build fails or is interrupted, PostgreSQL can leave an
+    invalid index behind.  Drop it and retry the command above before
+    upgrading:
+
+    ~~~~ sql
+    DROP INDEX CONCURRENTLY IF EXISTS posts_url_index;
+    ~~~~
+
+    [[#596]]
+
+[#596]: https://github.com/fedify-dev/hollo/issues/596
+
+
 Version 0.9.16
 --------------
 

drizzle/20260830122645_posts-url-index/migration.sql

@@ -0,0 +1,26 @@
+-- CONCURRENTLY omitted: Drizzle migrator wraps pending PostgreSQL migrations
+-- in a transaction, and CREATE INDEX CONCURRENTLY cannot run inside one.
+-- Large installations can pre-create this index with CONCURRENTLY before
+-- deployment; IF NOT EXISTS makes this step a no-op after a successful build.
+CREATE INDEX IF NOT EXISTS "posts_url_index"
+  ON "posts" USING hash ("url")
+  WHERE ("url" IS NOT NULL);
+--> statement-breakpoint
+DO $$ BEGIN
+  IF NOT EXISTS (
+    SELECT 1
+    FROM pg_catalog.pg_index AS idx
+    JOIN pg_catalog.pg_class AS relation
+      ON relation.oid = idx.indexrelid
+    JOIN pg_catalog.pg_am AS access_method
+      ON access_method.oid = relation.relam
+    WHERE relation.oid = 'public.posts_url_index'::regclass
+      AND idx.indrelid = 'public.posts'::regclass
+      AND idx.indisvalid
+      AND idx.indnkeyatts = 1
+      AND pg_get_indexdef(relation.oid, 1, false) = 'url'
+      AND access_method.amname = 'hash'
+  ) THEN
+    RAISE EXCEPTION 'posts_url_index is missing or invalid';
+  END IF;
+END $$;