78 lines
2.5 KiB
Ruby
78 lines
2.5 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module BackgroundMigration
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# A job to create ci_namespace_mirrors entries in batches
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class BackfillCiNamespaceMirrors
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class Namespace < ActiveRecord::Base # rubocop:disable Style/Documentation
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include ::EachBatch
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self.table_name = 'namespaces'
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self.inheritance_column = nil
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scope :base_query, -> do
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select(:id, :parent_id)
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end
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end
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PAUSE_SECONDS = 0.1
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SUB_BATCH_SIZE = 500
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def perform(start_id, end_id)
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batch_query = Namespace.base_query.where(id: start_id..end_id)
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batch_query.each_batch(of: SUB_BATCH_SIZE) do |sub_batch|
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first, last = sub_batch.pluck(Arel.sql('MIN(id), MAX(id)')).first
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ranged_query = Namespace.unscoped.base_query.where(id: first..last)
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update_sql = <<~SQL
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INSERT INTO ci_namespace_mirrors (namespace_id, traversal_ids)
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#{insert_values(ranged_query)}
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ON CONFLICT (namespace_id) DO NOTHING
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SQL
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# We do nothing on conflict because we consider they were already filled.
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Namespace.connection.execute(update_sql)
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sleep PAUSE_SECONDS
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end
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mark_job_as_succeeded(start_id, end_id)
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end
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private
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def insert_values(batch)
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calculated_traversal_ids(
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batch.allow_cross_joins_across_databases(url: 'https://gitlab.com/gitlab-org/gitlab/-/issues/336433')
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)
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end
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# Copied from lib/gitlab/background_migration/backfill_namespace_traversal_ids_children.rb
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def calculated_traversal_ids(batch)
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<<~SQL
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WITH RECURSIVE cte(source_id, namespace_id, parent_id, height) AS (
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(
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SELECT batch.id, batch.id, batch.parent_id, 1
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FROM (#{batch.to_sql}) AS batch
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)
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UNION ALL
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(
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SELECT cte.source_id, n.id, n.parent_id, cte.height+1
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FROM namespaces n, cte
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WHERE n.id = cte.parent_id
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)
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)
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SELECT flat_hierarchy.source_id as namespace_id,
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array_agg(flat_hierarchy.namespace_id ORDER BY flat_hierarchy.height DESC) as traversal_ids
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FROM (SELECT * FROM cte FOR UPDATE) flat_hierarchy
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GROUP BY flat_hierarchy.source_id
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SQL
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end
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def mark_job_as_succeeded(*arguments)
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Gitlab::Database::BackgroundMigrationJob.mark_all_as_succeeded('BackfillCiNamespaceMirrors', arguments)
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end
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end
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end
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end
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