Do not use WHERE NOT IN in CopyStatusStats migration (#8281)

Fix #8275

As the batch operation progresses, the statuses_stats table grows,
and the WHERE NOT IN subquery becomes more expensive
master
Eugen Rochko 6 years ago committed by GitHub
parent 0fc0980de1
commit f13afa1ee9
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  1. 2
      db/migrate/20180812173710_copy_status_stats.rb

@ -3,7 +3,7 @@ class CopyStatusStats < ActiveRecord::Migration[5.2]
def up
safety_assured do
Status.where.not(id: StatusStat.select('status_id')).select('id').find_in_batches do |statuses|
Status.unscoped.select('id').find_in_batches(batch_size: 5_000) do |statuses|
execute <<-SQL.squish
INSERT INTO status_stats (status_id, reblogs_count, favourites_count, created_at, updated_at)
SELECT id, reblogs_count, favourites_count, created_at, updated_at

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