Class: Gitlab::BackgroundMigration::BackfillIssuesDatesWithWorkItemDatesSources

Inherits:
BatchedMigrationJob
  • Object
show all
Defined in:
lib/gitlab/background_migration/backfill_issues_dates_with_work_item_dates_sources.rb

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_issues_dates_with_work_item_dates_sources.rb', line 9

def perform
  each_sub_batch do |sub_batch|
    inner_scope = sub_batch.select(:start_date, :due_date, :issue_id)

    define_batchable_model('issues', connection: ApplicationRecord.connection).connection.execute <<~SQL
      WITH work_item_dates_sources_date_values AS MATERIALIZED (
        #{inner_scope.to_sql}
      )
      UPDATE issues
      SET
        start_date = work_item_dates_sources_date_values.start_date,
        due_date = work_item_dates_sources_date_values.due_date
      FROM
        work_item_dates_sources_date_values
      WHERE
        work_item_dates_sources_date_values.issue_id = issues.id
        AND work_item_dates_sources_date_values.start_date IS DISTINCT FROM issues.start_date
        AND work_item_dates_sources_date_values.due_date IS DISTINCT FROM issues.due_date
    SQL
  end
end