30 lines
1.0 KiB
Ruby
30 lines
1.0 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module BackgroundMigration
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# rubocop: disable BackgroundMigration/FeatureCategory -- Feature category to be specified by inheriting class
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class BackfillDesiredShardingKeyJob < BatchedMigrationJob
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job_arguments :backfill_column, :backfill_via_table, :backfill_via_column, :backfill_via_foreign_key
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scope_to ->(relation) { relation.where(backfill_column => nil) }
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def perform
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each_sub_batch do |sub_batch|
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sub_batch.connection.execute(construct_query(sub_batch: sub_batch))
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end
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end
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def construct_query(sub_batch:)
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<<~SQL
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UPDATE #{batch_table}
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SET #{backfill_column} = #{backfill_via_table}.#{backfill_via_column}
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FROM #{backfill_via_table}
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WHERE #{backfill_via_table}.id = #{batch_table}.#{backfill_via_foreign_key}
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AND #{batch_table}.id IN (#{sub_batch.select(:id).to_sql})
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SQL
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end
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end
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# rubocop: enable BackgroundMigration/FeatureCategory
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end
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end
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