Class: Gitlab::BackgroundMigration::BackfillMissingNamespaceIdOnNotes

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

Overview

rubocop:disable Metrics/ClassLength – Background migration requires multiple resolution strategies for different noteable types

Constant Summary

Constants inherited from BatchedMigrationJob

Gitlab::BackgroundMigration::BatchedMigrationJob::DEFAULT_FEATURE_CATEGORY, Gitlab::BackgroundMigration::BatchedMigrationJob::MINIMUM_PAUSE_MS

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, health_context_tables, #initialize, job_arguments, job_arguments_count, operation_name, scope_to, tables_to_check_for_vacuum

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_missing_namespace_id_on_notes.rb', line 13

def perform
  each_sub_batch do |sub_batch|
    # Build common CTEs that will be reused for all update queries
    ctes = build_common_ctes(sub_batch)

    # Get distinct noteable types in this batch to avoid unnecessary queries
    noteable_types = fetch_noteable_types_in_batch(ctes)

    # Skip processing if no notes need updating
    next if noteable_types.empty?

    # Process only the noteable types that exist in this batch
    process_noteables_with_ctes(ctes, noteable_types)

    # Archive orphaned notes (those still without namespace_id)
    archive_orphaned_notes_with_ctes(ctes)
  end
end