From 998437d4a4111055e019f28dd84a8af1f9a27047 Mon Sep 17 00:00:00 2001 From: Ivan Tashkinov Date: Thu, 18 Feb 2021 21:03:06 +0300 Subject: [PATCH] [#3213] Experimental / debug feature: `database: [improved_hashtag_timeline: :preselect_hashtag_ids]`. --- lib/pleroma/web/activity_pub/activity_pub.ex | 47 +++++++++++++++----- 1 file changed, 35 insertions(+), 12 deletions(-) diff --git a/lib/pleroma/web/activity_pub/activity_pub.ex b/lib/pleroma/web/activity_pub/activity_pub.ex index e012f2779..5392ce7c9 100644 --- a/lib/pleroma/web/activity_pub/activity_pub.ex +++ b/lib/pleroma/web/activity_pub/activity_pub.ex @@ -787,19 +787,42 @@ defp restrict_hashtag_any(_query, %{tag: _tag, skip_preload: true}) do end defp restrict_hashtag_any(query, %{tag: [_ | _] = tags}) do - from( - [_activity, object] in query, - where: - fragment( - """ - EXISTS (SELECT 1 FROM hashtags JOIN hashtags_objects - ON hashtags_objects.hashtag_id = hashtags.id WHERE hashtags.name = ANY(?::citext[]) - AND hashtags_objects.object_id = ? LIMIT 1) - """, - ^tags, - object.id + # TODO: refactor: debug / experimental feature + if Config.get([:database, :improved_hashtag_timeline]) == :preselect_hashtag_ids do + hashtag_ids = + from(ht in Pleroma.Hashtag, + where: fragment("name = ANY(?::citext[])", ^tags), + select: ht.id ) - ) + |> Repo.all() + + from( + [_activity, object] in query, + where: + fragment( + """ + EXISTS ( + SELECT 1 FROM hashtags_objects WHERE hashtag_id = ANY(?) AND object_id = ? LIMIT 1) + """, + ^hashtag_ids, + object.id + ) + ) + else + from( + [_activity, object] in query, + where: + fragment( + """ + EXISTS (SELECT 1 FROM hashtags JOIN hashtags_objects + ON hashtags_objects.hashtag_id = hashtags.id WHERE hashtags.name = ANY(?::citext[]) + AND hashtags_objects.object_id = ? LIMIT 1) + """, + ^tags, + object.id + ) + ) + end end defp restrict_hashtag_any(query, %{tag: tag}) when is_binary(tag) do