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# frozen_string_literal: true
module Gitlab
module BackgroundMigration
# The class to populates the non private projects counter of topics
class PopulateTopicsNonPrivateProjectsCount
SUB_BATCH_SIZE = 100
# Temporary AR model for topics
class Topic < ActiveRecord::Base
include EachBatch
self.table_name = 'topics'
end
def perform(start_id, stop_id)
Topic.where(id: start_id..stop_id).each_batch(of: SUB_BATCH_SIZE) do |batch|
ApplicationRecord.connection.execute(<<~SQL)
WITH batched_relation AS #{Gitlab::Database::AsWithMaterialized.materialized_if_supported} (#{batch.select(:id).limit(SUB_BATCH_SIZE).to_sql})
UPDATE topics
SET non_private_projects_count = (
SELECT COUNT(*)
FROM project_topics
INNER JOIN projects
ON project_topics.project_id = projects.id
WHERE project_topics.topic_id = batched_relation.id
AND projects.visibility_level > 0
)
FROM batched_relation
WHERE topics.id = batched_relation.id
SQL
end
end
end
end
end
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