Class: Gitlab::BackgroundMigration::BackfillMergeRequestDiffsProjectId

Inherits:
BatchedMigrationJob show all
Defined in:
lib/gitlab/background_migration/backfill_merge_request_diffs_project_id.rb

Overview

This migration populates the new ‘merge_request_diffs.project_id` column from joining with `merge_requests` table

Constant Summary

Constants inherited from BatchedMigrationJob

Gitlab::BackgroundMigration::BatchedMigrationJob::DEFAULT_FEATURE_CATEGORY

Constants included from Database::DynamicModelHelpers

Database::DynamicModelHelpers::BATCH_SIZE

Instance Method Summary collapse

Methods inherited from BatchedMigrationJob

#batch_metrics, cursor, cursor?, cursor_columns, feature_category, #filter_batch, generic_instance, #initialize, job_arguments, job_arguments_count, operation_name, scope_to

Methods included from Database::DynamicModelHelpers

#define_batchable_model, #each_batch, #each_batch_range

Constructor Details

This class inherits a constructor from Gitlab::BackgroundMigration::BatchedMigrationJob

Instance Method Details

#perform ⇒ Object 



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# File 'lib/gitlab/background_migration/backfill_merge_request_diffs_project_id.rb', line 12

def perform
  each_sub_batch do |sub_batch|
    ApplicationRecord.connection.execute <<-SQL
      UPDATE merge_request_diffs
      SET project_id = merge_requests.target_project_id
      FROM merge_requests
      WHERE merge_requests.id = merge_request_diffs.merge_request_id
      AND merge_request_diffs.id IN (#{sub_batch.select(:id).to_sql})
    SQL
  end
end