+-- This converts the old hot_rank functions, to columns
+
+-- Remove the old compound indexes
+DROP INDEX idx_post_aggregates_featured_local_newest_comment_time;
+DROP INDEX idx_post_aggregates_featured_community_newest_comment_time;
+DROP INDEX idx_post_aggregates_featured_local_comments;
+DROP INDEX idx_post_aggregates_featured_community_comments;
+DROP INDEX idx_post_aggregates_featured_local_hot;
+DROP INDEX idx_post_aggregates_featured_community_hot;
+DROP INDEX idx_post_aggregates_featured_local_score;
+DROP INDEX idx_post_aggregates_featured_community_score;
+DROP INDEX idx_post_aggregates_featured_local_published;
+DROP INDEX idx_post_aggregates_featured_community_published;
+DROP INDEX idx_post_aggregates_featured_local_active;
+DROP INDEX idx_post_aggregates_featured_community_active;
+
+DROP INDEX idx_comment_aggregates_hot;
+
+DROP INDEX idx_community_aggregates_hot;
+
+-- Add the new hot rank columns for post and comment aggregates
+-- Note: 1728 is the result of the hot_rank function, with a score of 1, posted now
+-- hot_rank = 10000*log10(1 + 3)/Power(2, 1.8)
+alter table post_aggregates add column hot_rank integer not null default 1728;
+alter table post_aggregates add column hot_rank_active integer not null default 1728;
+
+alter table comment_aggregates add column hot_rank integer not null default 1728;
+
+alter table community_aggregates add column hot_rank integer not null default 1728;
+
+-- Populate them initially
+-- Note: After initial population, these are updated in a periodic scheduled job,
+-- with only the last week being updated.
+update post_aggregates set hot_rank_active = hot_rank(score::numeric, newest_comment_time_necro);
+update post_aggregates set hot_rank = hot_rank(score::numeric, published);
+update comment_aggregates set hot_rank = hot_rank(score::numeric, published);
+update community_aggregates set hot_rank = hot_rank(subscribers::numeric, published);
+
+-- Create single column indexes
+create index idx_post_aggregates_score on post_aggregates (score desc);
+create index idx_post_aggregates_published on post_aggregates (published desc);
+create index idx_post_aggregates_newest_comment_time on post_aggregates (newest_comment_time desc);
+create index idx_post_aggregates_newest_comment_time_necro on post_aggregates (newest_comment_time_necro desc);
+create index idx_post_aggregates_featured_community on post_aggregates (featured_community desc);
+create index idx_post_aggregates_featured_local on post_aggregates (featured_local desc);
+create index idx_post_aggregates_hot on post_aggregates (hot_rank desc);
+create index idx_post_aggregates_active on post_aggregates (hot_rank_active desc);
+
+create index idx_comment_aggregates_hot on comment_aggregates (hot_rank desc);
+
+create index idx_community_aggregates_hot on community_aggregates (hot_rank desc);