30 lines
982 B
Ruby
30 lines
982 B
Ruby
# frozen_string_literal: true
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module Gitlab
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module BackgroundMigration
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SUB_BATCH_SIZE = 1_000
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# The class to populates the total projects counter cache of topics
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class PopulateTopicsTotalProjectsCountCache
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# Temporary AR model for topics
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class Topic < ActiveRecord::Base
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include EachBatch
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self.table_name = 'topics'
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end
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def perform(start_id, stop_id)
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Topic.where(id: start_id..stop_id).each_batch(of: SUB_BATCH_SIZE) do |batch|
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ApplicationRecord.connection.execute(<<~SQL)
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WITH batched_relation AS #{Gitlab::Database::AsWithMaterialized.materialized_if_supported} (#{batch.select(:id).limit(SUB_BATCH_SIZE).to_sql})
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UPDATE topics
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SET total_projects_count = (SELECT COUNT(*) FROM project_topics WHERE topic_id = batched_relation.id)
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FROM batched_relation
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WHERE topics.id = batched_relation.id
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SQL
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end
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end
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end
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end
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end
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