Squash old migrations

- Squash migrations of the year 2019

Changelog: performance

Relates to https://gitlab.com/gitlab-org/gitlab/-/issues/331248

db/migrate/20190103140724_make_legacy_false_default.rb

-# frozen_string_literal: true
-
-class MakeLegacyFalseDefault < ActiveRecord::Migration[5.0]
-  DOWNTIME = false
-
-  def change
-    change_column_default :cluster_providers_gcp, :legacy_abac, from: true, to: false
-  end
-end

db/migrate/20190104182041_cleanup_legacy_artifact_migration.rb

-# frozen_string_literal: true
-
-class CleanupLegacyArtifactMigration < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  class Build < ActiveRecord::Base
-    include EachBatch
-
-    self.table_name = 'ci_builds'
-    self.inheritance_column = :_type_disabled
-
-    scope :with_legacy_artifacts, -> { where("artifacts_file <> ''") }
-  end
-
-  def up
-    Gitlab::BackgroundMigration.steal('MigrateLegacyArtifacts')
-
-    CleanupLegacyArtifactMigration::Build
-      .with_legacy_artifacts
-      .each_batch(of: 100) do |batch|
-      range = batch.pluck('MIN(id)', 'MAX(id)').first
-
-      Gitlab::BackgroundMigration::MigrateLegacyArtifacts.new.perform(*range)
-    end
-  end
-
-  def down
-    # no-op
-  end
-end

db/migrate/20190107151020_add_services_type_index.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddServicesTypeIndex < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :services, :type unless index_exists?(:services, :type)
-  end
-
-  def down
-    remove_concurrent_index :services, :type if index_exists?(:services, :type)
-  end
-end

db/migrate/20190108192941_remove_partial_index_from_ci_builds_artifacts_file.rb

-# frozen_string_literal: true
-
-class RemovePartialIndexFromCiBuildsArtifactsFile < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  INDEX_NAME = 'partial_index_ci_builds_on_id_with_legacy_artifacts'
-
-  disable_ddl_transaction!
-
-  def up
-    remove_concurrent_index_by_name(:ci_builds, INDEX_NAME)
-  end
-
-  def down
-    add_concurrent_index(:ci_builds, :id, where: "artifacts_file <> ''", name: INDEX_NAME)
-  end
-end

db/migrate/20190109153125_add_merge_request_external_diffs.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddMergeRequestExternalDiffs < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  def change
-    # Allow the merge request diff to store details about an external file
-    add_column :merge_request_diffs, :external_diff, :string # rubocop:disable Migration/PreventStrings
-    add_column :merge_request_diffs, :external_diff_store, :integer
-    add_column :merge_request_diffs, :stored_externally, :boolean
-
-    # The diff for each file is mapped to a range in the external file
-    add_column :merge_request_diff_files, :external_diff_offset, :integer
-    add_column :merge_request_diff_files, :external_diff_size, :integer
-
-    # If the diff is in object storage, it will be null in the database
-    change_column_null :merge_request_diff_files, :diff, true
-  end
-end

db/migrate/20190114172110_add_domain_to_cluster.rb

-# frozen_string_literal: true
-
-class AddDomainToCluster < ActiveRecord::Migration[5.0]
-  DOWNTIME = false
-
-  def change
-    add_column :clusters, :domain, :string # rubocop:disable Migration/PreventStrings
-  end
-end

db/migrate/20190115054216_add_error_notification_sent_to_remote_mirrors.rb

-# frozen_string_literal: true
-
-class AddErrorNotificationSentToRemoteMirrors < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    add_column :remote_mirrors, :error_notification_sent, :boolean
-  end
-end

db/migrate/20190115092821_add_columns_project_error_tracking_settings.rb

-# frozen_string_literal: true
-
-class AddColumnsProjectErrorTrackingSettings < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  def change
-    add_column :project_error_tracking_settings, :project_name, :string
-    add_column :project_error_tracking_settings, :organization_name, :string
-
-    change_column_default :project_error_tracking_settings, :enabled, from: true, to: false
-
-    change_column_null :project_error_tracking_settings, :api_url, true
-  end
-  # rubocop:enable Migration/PreventStrings
-end

db/migrate/20190116234221_add_sorting_fields_to_user_preference.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddSortingFieldsToUserPreference < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  def up
-    add_column :user_preferences, :issues_sort, :string
-    add_column :user_preferences, :merge_requests_sort, :string
-  end
-  # rubocop:enable Migration/PreventStrings
-
-  def down
-    remove_column :user_preferences, :issues_sort
-    remove_column :user_preferences, :merge_requests_sort
-  end
-end

db/migrate/20190130091630_add_local_cached_markdown_version.rb

-# frozen_string_literal: true
-
-class AddLocalCachedMarkdownVersion < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    add_column :application_settings, :local_markdown_version, :integer, default: 0, null: false
-  end
-end

db/migrate/20190206193120_add_index_to_tags.rb

-# frozen_string_literal: true
-
-class AddIndexToTags < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  INDEX_NAME = 'index_tags_on_name_trigram'
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :tags, :name, name: INDEX_NAME, using: :gin, opclass: { name: :gin_trgm_ops }
-  end
-
-  def down
-    remove_concurrent_index_by_name(:tags, INDEX_NAME)
-  end
-end

db/migrate/20190211131150_add_state_id_to_issuables.rb

-# frozen_string_literal: true
-
-class AddStateIdToIssuables < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def up
-    add_column :issues, :state_id, :integer, limit: 2
-    add_column :merge_requests, :state_id, :integer, limit: 2
-  end
-
-  def down
-    remove_column :issues, :state_id
-    remove_column :merge_requests, :state_id
-  end
-end

db/migrate/20190215154930_add_merge_pipelines_enabled_to_ci_cd_settings.rb

-# frozen_string_literal: true
-
-class AddMergePipelinesEnabledToCiCdSettings < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    add_column :project_ci_cd_settings, :merge_pipelines_enabled, :boolean
-  end
-end

db/migrate/20190218134158_add_masked_to_ci_variables.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddMaskedToCiVariables < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default :ci_variables, :masked, :boolean, default: false, allow_null: false # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column :ci_variables, :masked
-  end
-end

db/migrate/20190218134209_add_masked_to_ci_group_variables.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddMaskedToCiGroupVariables < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default :ci_group_variables, :masked, :boolean, default: false, allow_null: false # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column :ci_group_variables, :masked
-  end
-end

db/migrate/20190219201635_add_asset_proxy_settings.rb

-# frozen_string_literal: true
-
-class AddAssetProxySettings < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  # rubocop:disable Migration/AddLimitToTextColumns
-  def change
-    add_column :application_settings, :asset_proxy_enabled, :boolean, default: false, null: false
-    add_column :application_settings, :asset_proxy_url, :string
-    add_column :application_settings, :asset_proxy_whitelist, :text
-    add_column :application_settings, :encrypted_asset_proxy_secret_key, :text
-    add_column :application_settings, :encrypted_asset_proxy_secret_key_iv, :string
-  end
-  # rubocop:enable Migration/AddLimitToTextColumns
-  # rubocop:enable Migration/PreventStrings
-end

db/migrate/20190220142344_add_email_header_and_footer_enabled_flag_to_appearances_table.rb

-# frozen_string_literal: true
-
-class AddEmailHeaderAndFooterEnabledFlagToAppearancesTable < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  disable_ddl_transaction!
-
-  DOWNTIME = false
-
-  def up
-    add_column_with_default(:appearances, :email_header_and_footer_enabled, :boolean, default: false) # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column(:appearances, :email_header_and_footer_enabled)
-  end
-end

db/migrate/20190220150130_add_extra_shas_to_ci_pipelines.rb

-# frozen_string_literal: true
-
-class AddExtraShasToCiPipelines < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    add_column :ci_pipelines, :source_sha, :binary
-    add_column :ci_pipelines, :target_sha, :binary
-  end
-end

db/migrate/20190222051615_add_indexes_for_merge_request_diffs_query.rb

-# frozen_string_literal: true
-
-class AddIndexesForMergeRequestDiffsQuery < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  INDEX_SPECS = [
-    [
-      :merge_request_metrics,
-      :latest_closed_at,
-      { where: 'latest_closed_at IS NOT NULL' }
-    ],
-    [
-      :merge_request_metrics,
-      [:merge_request_id, :merged_at],
-      { where: 'merged_at IS NOT NULL' }
-    ],
-    [
-      :merge_request_diffs,
-      [:merge_request_id, :id],
-      {
-        name: 'index_merge_request_diffs_on_merge_request_id_and_id_partial',
-        where: 'NOT stored_externally OR stored_externally IS NULL'
-      }
-    ]
-  ].freeze
-
-  disable_ddl_transaction!
-
-  def up
-    INDEX_SPECS.each do |spec|
-      add_concurrent_index(*spec)
-    end
-  end
-
-  def down
-    INDEX_SPECS.reverse_each do |spec|
-      remove_concurrent_index(*spec)
-    end
-  end
-end

db/migrate/20190225152525_add_auto_dev_ops_enabled_to_namespaces.rb

-# frozen_string_literal: true
-
-class AddAutoDevOpsEnabledToNamespaces < ActiveRecord::Migration[5.0]
-  DOWNTIME = false
-
-  def change
-    add_column :namespaces, :auto_devops_enabled, :boolean # rubocop:disable Migration/AddColumnsToWideTables
-  end
-end

db/migrate/20190225160301_add_runner_tokens_indexes.rb

-# frozen_string_literal: true
-
-class AddRunnerTokensIndexes < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  # It seems that `ci_runners.token_encrypted` and `projects.runners_token_encrypted`
-  # are non-unique
-
-  def up
-    add_concurrent_index :ci_runners, :token_encrypted
-    add_concurrent_index :projects, :runners_token_encrypted
-    add_concurrent_index :namespaces, :runners_token_encrypted, unique: true
-  end
-
-  def down
-    remove_concurrent_index :ci_runners, :token_encrypted
-    remove_concurrent_index :projects, :runners_token_encrypted
-    remove_concurrent_index :namespaces, :runners_token_encrypted, unique: true
-  end
-end

db/migrate/20190228192410_add_multi_line_attributes_to_suggestion.rb

-# frozen_string_literal: true
-
-class AddMultiLineAttributesToSuggestion < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default :suggestions, :lines_above, :integer, default: 0, allow_null: false # rubocop:disable Migration/AddColumnWithDefault
-    add_column_with_default :suggestions, :lines_below, :integer, default: 0, allow_null: false # rubocop:disable Migration/AddColumnWithDefault
-    add_column_with_default :suggestions, :outdated, :boolean, default: false, allow_null: false # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_columns :suggestions, :outdated, :lines_above, :lines_below
-  end
-end

db/migrate/20190301182457_add_external_hostname_to_ingress_and_knative.rb

-# frozen_string_literal: true
-
-class AddExternalHostnameToIngressAndKnative < ActiveRecord::Migration[5.0]
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  def change
-    add_column :clusters_applications_ingress, :external_hostname, :string
-    add_column :clusters_applications_knative, :external_hostname, :string
-  end
-  # rubocop:enable Migration/PreventStrings
-end

db/migrate/20190312071108_add_detected_repository_languages_to_projects.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddDetectedRepositoryLanguagesToProjects < ActiveRecord::Migration[5.0]
-  DOWNTIME = false
-
-  def change
-    add_column :projects, :detected_repository_languages, :boolean # rubocop:disable Migration/AddColumnsToWideTables
-  end
-end

db/migrate/20190312113229_add_remove_at_to_pages_domains.rb

-# frozen_string_literal: true
-
-class AddRemoveAtToPagesDomains < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-  def change
-    add_column :pages_domains, :remove_at, :datetime_with_timezone
-  end
-end

db/migrate/20190312113634_add_remove_at_index_to_pages_domains.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddRemoveAtIndexToPagesDomains < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :pages_domains, :remove_at
-  end
-
-  def down
-    remove_concurrent_index :pages_domains, :remove_at
-  end
-end

db/migrate/20190315191339_create_merge_request_assignees_table.rb

-# frozen_string_literal: true
-
-class CreateMergeRequestAssigneesTable < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  INDEX_NAME = 'index_merge_request_assignees_on_merge_request_id_and_user_id'
-
-  def up
-    create_table :merge_request_assignees do |t|
-      t.references :user, foreign_key: { on_delete: :cascade }, index: true, null: false
-      t.references :merge_request, foreign_key: { on_delete: :cascade }, null: false
-    end
-
-    add_index :merge_request_assignees, [:merge_request_id, :user_id], unique: true, name: INDEX_NAME
-  end
-
-  def down
-    drop_table :merge_request_assignees
-  end
-end

db/migrate/20190320174702_add_lets_encrypt_notification_email_to_application_settings.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddLetsEncryptNotificationEmailToApplicationSettings < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  def change
-    add_column :application_settings, :lets_encrypt_notification_email, :string
-  end
-  # rubocop:enable Migration/PreventStrings
-end

db/migrate/20190322164830_add_auto_ssl_enabled_to_pages_domain.rb

-# frozen_string_literal: true
-
-class AddAutoSslEnabledToPagesDomain < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default :pages_domains, :auto_ssl_enabled, :boolean, default: false # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column :pages_domains, :auto_ssl_enabled
-  end
-end

db/migrate/20190325080727_truncate_user_fullname.rb

-# frozen_string_literal: true
-
-# rubocop:disable Migration/UpdateLargeTable
-class TruncateUserFullname < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    truncated_name = Arel.sql('SUBSTRING(name from 1 for 128)')
-    where_clause = Arel.sql("LENGTH(name) > 128")
-
-    update_column_in_batches(:users, :name, truncated_name) do |table, query|
-      query.where(where_clause)
-    end
-  end
-
-  def down
-    # noop
-  end
-end

db/migrate/20190325105715_add_fields_to_user_preferences.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddFieldsToUserPreferences < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  disable_ddl_transaction!
-
-  DOWNTIME = false
-
-  def up
-    add_column(:user_preferences, :timezone, :string) # rubocop:disable Migration/PreventStrings
-    add_column(:user_preferences, :time_display_relative, :boolean)
-    add_column(:user_preferences, :time_format_in_24h, :boolean)
-  end
-
-  def down
-    remove_column(:user_preferences, :timezone)
-    remove_column(:user_preferences, :time_display_relative)
-    remove_column(:user_preferences, :time_format_in_24h)
-  end
-end

db/migrate/20190325165127_add_managed_to_cluster.rb

-# frozen_string_literal: true
-
-class AddManagedToCluster < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  disable_ddl_transaction!
-
-  DOWNTIME = false
-
-  def up
-    add_column_with_default(:clusters, :managed, :boolean, default: true) # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column(:clusters, :managed)
-  end
-end

db/migrate/20190326164045_import_common_metrics_knative.rb

-# frozen_string_literal: true
-
-class ImportCommonMetricsKnative < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def up
-    ::Gitlab::DatabaseImporters::CommonMetrics::Importer.new.execute
-  end
-
-  def down
-    # no-op
-  end
-end

db/migrate/20190327163904_add_notification_email_to_notification_settings.rb

-# frozen_string_literal: true
-
-class AddNotificationEmailToNotificationSettings < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  def change
-    add_column :notification_settings, :notification_email, :string
-  end
-  # rubocop:enable Migration/PreventStrings
-end

db/migrate/20190329085614_add_lets_encrypt_terms_of_service_accepted_to_application_settings.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddLetsEncryptTermsOfServiceAcceptedToApplicationSettings < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default(:application_settings, :lets_encrypt_terms_of_service_accepted, :boolean, default: false) # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column :application_settings, :lets_encrypt_terms_of_service_accepted
-  end
-end

db/migrate/20190403161806_update_designs_index.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class UpdateDesignsIndex < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    remove_concurrent_index :design_management_designs, :issue_id, unique: true
-  end
-
-  def down
-    add_concurrent_index :design_management_designs, :issue_id, unique: true
-  end
-end

db/migrate/20190408163745_prometheus_knative05_fix.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class PrometheusKnative05Fix < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def up
-    ::Gitlab::DatabaseImporters::CommonMetrics::Importer.new.execute
-  end
-
-  def down
-    # no-op
-  end
-end

db/migrate/20190409224933_add_name_to_geo_nodes.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddNameToGeoNodes < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  def up
-    add_column :geo_nodes, :name, :string # rubocop:disable Migration/PreventStrings
-
-    # url is also unique, and its type and size is identical to the name column,
-    # so this is safe.
-    execute "UPDATE geo_nodes SET name = url;"
-
-    # url is also `null: false`, so this is safe.
-    change_column :geo_nodes, :name, :string, null: false
-  end
-
-  def down
-    remove_column :geo_nodes, :name
-  end
-end

db/migrate/20190410173409_add_name_index_to_geo_nodes.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddNameIndexToGeoNodes < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :geo_nodes, :name, unique: true
-  end
-
-  def down
-    remove_concurrent_index :geo_nodes, :name
-  end
-end

db/migrate/20190412155659_add_merge_request_blocks.rb

-# frozen_string_literal: true
-
-class AddMergeRequestBlocks < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    create_table :merge_request_blocks, id: :bigserial do |t|
-      t.references :blocking_merge_request,
-                   index: false, null: false,
-                   foreign_key: { to_table: :merge_requests, on_delete: :cascade }
-
-      t.references :blocked_merge_request,
-                   index: true, null: false,
-                   foreign_key: { to_table: :merge_requests, on_delete: :cascade }
-
-      t.index [:blocking_merge_request_id, :blocked_merge_request_id],
-              unique: true,
-              name: 'index_mr_blocks_on_blocking_and_blocked_mr_ids'
-
-      t.timestamps_with_timezone
-    end
-  end
-end

db/migrate/20190412183653_remove_url_index_from_geo_nodes.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class RemoveUrlIndexFromGeoNodes < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    remove_concurrent_index :geo_nodes, :url
-  end
-
-  def down
-    add_concurrent_index :geo_nodes, :url, unique: true
-  end
-end

db/migrate/20190414185432_add_comment_to_vulnerability_feedback.rb

-# frozen_string_literal: true
-
-class AddCommentToVulnerabilityFeedback < ActiveRecord::Migration[5.1]
-  DOWNTIME = false
-
-  def up
-    add_column :vulnerability_feedback, :comment_author_id, :integer
-    add_column :vulnerability_feedback, :comment, :text # rubocop:disable Migration/AddLimitToTextColumns
-    add_column :vulnerability_feedback, :comment_timestamp, :datetime_with_timezone
-  end
-
-  def down
-    remove_column :vulnerability_feedback, :comment_author_id
-    remove_column :vulnerability_feedback, :comment
-    remove_column :vulnerability_feedback, :comment_timestamp
-  end
-end

db/migrate/20190415030217_add_variable_type_to_ci_variables.rb

-# frozen_string_literal: true
-
-class AddVariableTypeToCiVariables < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-  disable_ddl_transaction!
-
-  DOWNTIME = false
-  ENV_VAR_VARIABLE_TYPE = 1
-
-  def up
-    add_column_with_default(:ci_variables, :variable_type, :smallint, default: ENV_VAR_VARIABLE_TYPE) # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column(:ci_variables, :variable_type)
-  end
-end

db/migrate/20190415095825_add_packages_size_to_project_statistics.rb

-# frozen_string_literal: true
-
-class AddPackagesSizeToProjectStatistics < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    add_column :project_statistics, :packages_size, :bigint
-  end
-end

db/migrate/20190415172035_update_insights_foreign_keys.rb

-# frozen_string_literal: true
-
-# rubocop: disable Migration/AddConcurrentForeignKey
-
-class UpdateInsightsForeignKeys < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def up
-    remove_foreign_key_if_exists(:insights, column: :project_id)
-    add_foreign_key(:insights, :projects, column: :project_id, on_delete: :cascade)
-
-    remove_foreign_key_if_exists(:insights, column: :namespace_id)
-    add_foreign_key(:insights, :namespaces, column: :namespace_id, on_delete: :cascade)
-  end
-
-  def down
-    remove_foreign_key_if_exists(:insights, column: :namespace_id)
-    add_foreign_key(:insights, :namespaces, column: :namespace_id)
-
-    remove_foreign_key_if_exists(:insights, column: :project_id)
-    add_foreign_key(:insights, :projects, column: :project_id)
-  end
-end

db/migrate/20190416185130_add_merge_train_enabled_to_ci_cd_settings.rb

-# frozen_string_literal: true
-
-class AddMergeTrainEnabledToCiCdSettings < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  # rubocop:disable Migration/AddColumnWithDefault
-  # rubocop:disable Migration/UpdateLargeTable
-  def up
-    add_column_with_default :project_ci_cd_settings, :merge_trains_enabled, :boolean, default: false, allow_null: false
-  end
-  # rubocop:enable Migration/AddColumnWithDefault
-  # rubocop:enable Migration/UpdateLargeTable
-
-  def down
-    remove_column :project_ci_cd_settings, :merge_trains_enabled
-  end
-end

db/migrate/20190416213556_add_variable_type_to_ci_group_variables.rb

-# frozen_string_literal: true
-
-class AddVariableTypeToCiGroupVariables < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-  disable_ddl_transaction!
-
-  DOWNTIME = false
-  ENV_VAR_VARIABLE_TYPE = 1
-
-  def up
-    add_column_with_default(:ci_group_variables, :variable_type, :smallint, default: ENV_VAR_VARIABLE_TYPE) # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column(:ci_group_variables, :variable_type)
-  end
-end

db/migrate/20190416213615_add_variable_type_to_ci_pipeline_variables.rb

-# frozen_string_literal: true
-
-class AddVariableTypeToCiPipelineVariables < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-  disable_ddl_transaction!
-
-  DOWNTIME = false
-  ENV_VAR_VARIABLE_TYPE = 1
-
-  # rubocop:disable Migration/AddColumnWithDefault
-  # rubocop:disable Migration/UpdateLargeTable
-  def up
-    add_column_with_default(:ci_pipeline_variables, :variable_type, :smallint, default: ENV_VAR_VARIABLE_TYPE)
-  end
-  # rubocop:enable Migration/AddColumnWithDefault
-  # rubocop:enable Migration/UpdateLargeTable
-
-  def down
-    remove_column(:ci_pipeline_variables, :variable_type)
-  end
-end

db/migrate/20190416213631_add_variable_type_to_ci_pipeline_schedule_variables.rb

-# frozen_string_literal: true
-
-class AddVariableTypeToCiPipelineScheduleVariables < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-  disable_ddl_transaction!
-
-  DOWNTIME = false
-  ENV_VAR_VARIABLE_TYPE = 1
-
-  def up
-    add_column_with_default(:ci_pipeline_schedule_variables, :variable_type, :smallint, default: ENV_VAR_VARIABLE_TYPE) # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column(:ci_pipeline_schedule_variables, :variable_type)
-  end
-end

db/migrate/20190418132750_add_foreign_key_from_vulnerability_feedback_to_users.rb

-# frozen_string_literal: true
-
-class AddForeignKeyFromVulnerabilityFeedbackToUsers < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_foreign_key :vulnerability_feedback, :users, column: :comment_author_id, on_delete: :nullify
-    add_concurrent_index :vulnerability_feedback, :comment_author_id
-  end
-
-  def down
-    remove_foreign_key :vulnerability_feedback, column: :comment_author_id
-    remove_concurrent_index :vulnerability_feedback, :comment_author_id
-  end
-end

db/migrate/20190418182545_create_merge_request_trains_table.rb

-# frozen_string_literal: true
-
-class CreateMergeRequestTrainsTable < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    create_table :merge_trains, id: :bigserial do |t|
-      t.references :merge_request, foreign_key: { on_delete: :cascade }, type: :integer, index: false, null: false
-      t.references :user, foreign_key: { on_delete: :cascade }, type: :integer, null: false
-      t.references :pipeline, foreign_key: { to_table: :ci_pipelines, on_delete: :nullify }, type: :integer
-      t.timestamps_with_timezone null: false
-
-      t.index [:merge_request_id], unique: true
-    end
-  end
-end

db/migrate/20190419121952_add_bridged_pipeline_id_to_bridges.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddBridgedPipelineIdToBridges < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  def change
-    add_column :ci_builds, :upstream_pipeline_id, :integer # rubocop:disable Migration/AddColumnsToWideTables
-  end
-end

db/migrate/20190419123057_add_bridged_pipeline_id_foreign_key.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddBridgedPipelineIdForeignKey < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :ci_builds, :upstream_pipeline_id, where: 'upstream_pipeline_id IS NOT NULL'
-    add_concurrent_foreign_key :ci_builds, :ci_pipelines, column: :upstream_pipeline_id
-  end
-
-  def down
-    remove_foreign_key :ci_builds, column: :upstream_pipeline_id
-    remove_concurrent_index :ci_builds, :upstream_pipeline_id
-  end
-end

db/migrate/20190422082247_create_project_metrics_settings.rb

-# frozen_string_literal: true
-
-class CreateProjectMetricsSettings < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    create_table :project_metrics_settings, id: :int, primary_key: :project_id, default: nil do |t|
-      t.string :external_dashboard_url, null: false # rubocop:disable Migration/PreventStrings
-      t.foreign_key :projects, column: :project_id, on_delete: :cascade
-    end
-  end
-end

db/migrate/20190423124640_add_index_to_projects_mirror_user_id.rb

-# frozen_string_literal: true
-
-class AddIndexToProjectsMirrorUserId < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :projects, :mirror_user_id
-  end
-
-  def down
-    remove_concurrent_index :projects, :mirror_user_id
-  end
-end

db/migrate/20190426180107_add_deployment_events_to_services.rb

-# frozen_string_literal: true
-
-class AddDeploymentEventsToServices < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  # rubocop:disable Migration/AddColumnWithDefault
-  # rubocop:disable Migration/UpdateLargeTable
-  def up
-    add_column_with_default(:services, :deployment_events, :boolean, default: false, allow_null: false)
-  end
-  # rubocop:enable Migration/AddColumnWithDefault
-  # rubocop:enable Migration/UpdateLargeTable
-
-  def down
-    remove_column(:services, :deployment_events)
-  end
-end

db/migrate/20190429082448_create_pages_domain_acme_orders.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class CreatePagesDomainAcmeOrders < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  # rubocop:disable Migration/AddLimitToTextColumns
-  def change
-    create_table :pages_domain_acme_orders do |t|
-      t.references :pages_domain, null: false, index: true, foreign_key: { on_delete: :cascade }, type: :integer
-
-      t.datetime_with_timezone :expires_at, null: false
-      t.timestamps_with_timezone null: false
-
-      t.string :url, null: false
-
-      t.string :challenge_token, null: false, index: true
-      t.text :challenge_file_content, null: false
-
-      t.text :encrypted_private_key, null: false
-      t.text :encrypted_private_key_iv, null: false
-    end
-  end
-  # rubocop:enable Migration/AddLimitToTextColumns
-  # rubocop:enable Migration/PreventStrings
-end

db/migrate/20190430131225_create_issue_tracker_data.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class CreateIssueTrackerData < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  def change
-    create_table :issue_tracker_data do |t|
-      t.references :service, foreign_key: { on_delete: :cascade }, type: :integer, index: true, null: false
-      t.timestamps_with_timezone
-      t.string :encrypted_project_url
-      t.string :encrypted_project_url_iv
-      t.string :encrypted_issues_url
-      t.string :encrypted_issues_url_iv
-      t.string :encrypted_new_issue_url
-      t.string :encrypted_new_issue_url_iv
-    end
-  end
-  # rubocop:enable Migration/PreventStrings
-end

db/migrate/20190430142025_create_jira_tracker_data.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class CreateJiraTrackerData < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  def change
-    create_table :jira_tracker_data do |t|
-      t.references :service, foreign_key: { on_delete: :cascade }, type: :integer, index: true, null: false
-      t.timestamps_with_timezone
-      t.string :encrypted_url
-      t.string :encrypted_url_iv
-      t.string :encrypted_api_url
-      t.string :encrypted_api_url_iv
-      t.string :encrypted_username
-      t.string :encrypted_username_iv
-      t.string :encrypted_password
-      t.string :encrypted_password_iv
-      t.string :jira_issue_transition_id
-    end
-  end
-  # rubocop:enable Migration/PreventStrings
-end

db/migrate/20190506135337_add_temporary_indexes_to_state_id.rb

-# frozen_string_literal: true
-
-# This migration adds temporary indexes to state_id column of issues
-# and merge_requests tables. It will be used only to peform the scheduling
-# for populating state_id in a post migrate and will be removed after it.
-# Check: ScheduleSyncIssuablesStateIdWhereNil.
-
-class AddTemporaryIndexesToStateId < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    %w(issues merge_requests).each do |table|
-      add_concurrent_index(
-        table,
-        'id',
-        name: index_name_for(table),
-        where: "state_id IS NULL"
-      )
-    end
-  end
-
-  def down
-    remove_concurrent_index_by_name(:issues, index_name_for("issues"))
-    remove_concurrent_index_by_name(:merge_requests, index_name_for("merge_requests"))
-  end
-
-  def index_name_for(table)
-    "idx_on_#{table}_where_state_id_is_null"
-  end
-end

db/migrate/20190513174947_enable_create_incident_issues_by_default.rb

-# frozen_string_literal: true
-
-class EnableCreateIncidentIssuesByDefault < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    change_default_for :create_issue, from: false, to: true
-    change_default_for :send_email, from: true, to: false
-  end
-
-  private
-
-  def change_default_for(column, from:, to:)
-    change_column_default :project_incident_management_settings,
-      column, from: from, to: to
-  end
-end

db/migrate/20190514105711_create_ip_restriction.rb

-# frozen_string_literal: true
-
-class CreateIpRestriction < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    create_table :ip_restrictions do |t|
-      t.references :group, references: :namespace,
-                   column: :group_id,
-                   type: :integer,
-                   null: false,
-                   index: true
-      t.string :range, null: false # rubocop:disable Migration/PreventStrings
-    end
-
-    add_foreign_key(:ip_restrictions, :namespaces, column: :group_id, on_delete: :cascade) # rubocop: disable Migration/AddConcurrentForeignKey
-  end
-end

db/migrate/20190515125613_add_application_settings_elasticsearch_shards.rb

-# frozen_string_literal: true
-
-class AddApplicationSettingsElasticsearchShards < ActiveRecord::Migration[5.1]
-  DOWNTIME = false
-
-  def change
-    add_column :application_settings, :elasticsearch_shards, :integer, null: false, default: 5
-    add_column :application_settings, :elasticsearch_replicas, :integer, null: false, default: 1
-  end
-end

db/migrate/20190516011213_add_build_queued_at_index.rb

-# frozen_string_literal: true
-
-# This migration make queued_at field indexed to speed up builds filtering by job_age
-
-class AddBuildQueuedAtIndex < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :ci_builds, :queued_at
-  end
-
-  def down
-    remove_concurrent_index :ci_builds, :queued_at
-  end
-end

db/migrate/20190516151857_add_lets_encrypt_private_key_to_application_settings.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddLetsEncryptPrivateKeyToApplicationSettings < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  # rubocop:disable Migration/AddLimitToTextColumns
-  def change
-    add_column :application_settings, :encrypted_lets_encrypt_private_key, :text
-    add_column :application_settings, :encrypted_lets_encrypt_private_key_iv, :text
-  end
-  # rubocop:enable Migration/AddLimitToTextColumns
-end

db/migrate/20190516155724_change_packages_size_defaults_in_project_statistics.rb

-# frozen_string_literal: true
-
-class ChangePackagesSizeDefaultsInProjectStatistics < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    change_column_default :project_statistics, :packages_size, 0
-
-    update_column_in_batches(:project_statistics, :packages_size, 0) do |table, query|
-      query.where(table[:packages_size].eq(nil))
-    end
-
-    change_column_null :project_statistics, :packages_size, false
-  end
-
-  def down
-    change_column_null :project_statistics, :packages_size, true
-    change_column_default :project_statistics, :packages_size, nil
-  end
-end

db/migrate/20190520200123_add_rule_type_to_approval_merge_request_approval_rules.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddRuleTypeToApprovalMergeRequestApprovalRules < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default(:approval_merge_request_rules, :rule_type, :integer, limit: 2, default: 1) # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column(:approval_merge_request_rules, :rule_type)
-  end
-end

db/migrate/20190521174505_add_report_type_to_approval_merge_request_rules.rb

-# frozen_string_literal: true
-
-class AddReportTypeToApprovalMergeRequestRules < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    change_table :approval_merge_request_rules do |t|
-      t.integer :report_type, limit: 2
-    end
-  end
-end

db/migrate/20190523112344_limit_milestone_date_years_to_4_digits.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class LimitMilestoneDateYearsTo4Digits < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  # When a migration requires downtime you **must** uncomment the following
-  # constant and define a short and easy to understand explanation as to why the
-  # migration requires downtime.
-  # DOWNTIME_REASON = ''
-
-  # When using the methods "add_concurrent_index", "remove_concurrent_index" or
-  # "add_column_with_default" you must disable the use of transactions
-  # as these methods can not run in an existing transaction.
-  # When using "add_concurrent_index" or "remove_concurrent_index" methods make sure
-  # that either of them is the _only_ method called in the migration,
-  # any other changes should go in a separate migration.
-  # This ensures that upon failure _only_ the index creation or removing fails
-  # and can be retried or reverted easily.
-  #
-  # To disable transactions uncomment the following line and remove these
-  # comments:
-  # disable_ddl_transaction!
-
-  def change
-    Milestone.where("start_date > '9999-12-31'").update_all(
-      "start_date = '9999-12-31'"
-    )
-    Milestone.where("due_date > '9999-12-31'").update_all(
-      "due_date = '9999-12-31'"
-    )
-  end
-end

db/migrate/20190524062810_generate_lets_encrypt_private_key.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class GenerateLetsEncryptPrivateKey < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  # we now generate this key on the fly, but since this migration was merged to master, we don't remove it
-  def up
-  end
-
-  def down
-  end
-end

db/migrate/20190524071727_add_ssl_valid_period_to_pages_domain.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddSslValidPeriodToPagesDomain < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  def change
-    add_column :pages_domains, :certificate_valid_not_before, :datetime_with_timezone
-    add_column :pages_domains, :certificate_valid_not_after, :datetime_with_timezone
-  end
-end

db/migrate/20190527011309_add_required_template_name_to_application_settings.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddRequiredTemplateNameToApplicationSettings < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  def change
-    add_column :application_settings, :required_instance_ci_template, :string, null: true
-  end
-  # rubocop:enable Migration/PreventStrings
-end

db/migrate/20190527194830_add_wiki_size_to_statistics.rb

-# frozen_string_literal: true
-
-class AddWikiSizeToStatistics < ActiveRecord::Migration[5.0]
-  DOWNTIME = false
-
-  def change
-    add_column :project_statistics, :wiki_size, :bigint
-  end
-end

db/migrate/20190528173628_add_index_for_code_owner_rule_type_on_approval_merge_request_rules.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddIndexForCodeOwnerRuleTypeOnApprovalMergeRequestRules < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  INDEX_CODE_OWNERS_RULES_UNIQUENESS_NAME = 'index_approval_rule_name_for_code_owners_rule_type'
-  INDEX_CODE_OWNERS_RULES_QUERY_NAME = 'index_approval_rules_code_owners_rule_type'
-
-  class ApprovalMergeRequestRule < ActiveRecord::Base
-    include EachBatch
-
-    enum rule_types: {
-      regular: 1,
-      code_owner: 2
-    }
-  end
-
-  def up
-    # Ensure only 1 code_owner rule per merge_request
-    add_concurrent_index(
-      :approval_merge_request_rules,
-      [:merge_request_id, :rule_type, :name],
-      unique: true,
-      where: "rule_type = #{ApprovalMergeRequestRule.rule_types[:code_owner]}",
-      name: INDEX_CODE_OWNERS_RULES_UNIQUENESS_NAME
-    )
-
-    # Support lookups for all code_owner rules per merge_request
-    add_concurrent_index(
-      :approval_merge_request_rules,
-      [:merge_request_id, :rule_type],
-      where: "rule_type = #{ApprovalMergeRequestRule.rule_types[:code_owner]}",
-      name: INDEX_CODE_OWNERS_RULES_QUERY_NAME
-    )
-  end
-
-  def down
-    remove_concurrent_index_by_name(
-      :approval_merge_request_rules,
-      INDEX_CODE_OWNERS_RULES_UNIQUENESS_NAME
-    )
-
-    remove_concurrent_index_by_name(
-      :approval_merge_request_rules,
-      INDEX_CODE_OWNERS_RULES_QUERY_NAME
-    )
-  end
-end

db/migrate/20190529142545_add_dns_rebinding_protection_enabled_to_application_settings.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddDnsRebindingProtectionEnabledToApplicationSettings < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default(:application_settings, :dns_rebinding_protection_enabled, # rubocop:disable Migration/AddColumnWithDefault
-                            :boolean,
-                            default: true,
-                            allow_null: false)
-  end
-
-  def down
-    remove_column(:application_settings, :dns_rebinding_protection_enabled)
-  end
-end

db/migrate/20190530042141_add_default_git_depth_to_ci_cd_settings.rb

-# frozen_string_literal: true
-
-class AddDefaultGitDepthToCiCdSettings < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    add_column :project_ci_cd_settings, :default_git_depth, :integer
-  end
-end

db/migrate/20190530154715_add_index_to_merge_requests_state_and_merge_status.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddIndexToMergeRequestsStateAndMergeStatus < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :merge_requests, [:state, :merge_status],
-                         where: "state = 'opened' AND merge_status = 'can_be_merged'"
-  end
-
-  def down
-    remove_concurrent_index :merge_requests, [:state, :merge_status]
-  end
-end

db/migrate/20190531153110_create_namespace_root_storage_statistics.rb

-# frozen_string_literal: true
-
-class CreateNamespaceRootStorageStatistics < ActiveRecord::Migration[5.1]
-  DOWNTIME = false
-
-  def change
-    create_table :namespace_root_storage_statistics, id: false, primary_key: :namespace_id do |t|
-      t.integer :namespace_id, null: false, primary_key: true
-      t.datetime_with_timezone :updated_at, null: false
-
-      t.bigint :repository_size, null: false, default: 0
-      t.bigint :lfs_objects_size, null: false, default: 0
-      t.bigint :wiki_size, null: false, default: 0
-      t.bigint :build_artifacts_size, null: false, default: 0
-      t.bigint :storage_size, null: false, default: 0
-      t.bigint :packages_size, null: false, default: 0
-
-      t.index :namespace_id, unique: true
-      t.foreign_key :namespaces, column: :namespace_id, on_delete: :cascade
-    end
-  end
-end

db/migrate/20190602014139_add_repository_type_to_lfs_objects_project.rb

-# frozen_string_literal: true
-
-class AddRepositoryTypeToLfsObjectsProject < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    add_column :lfs_objects_projects, :repository_type, :integer, limit: 2, null: true
-  end
-end

db/migrate/20190603124955_add_index_to_count_pending_mirror_updates.rb

-# frozen_string_literal: true
-
-class AddIndexToCountPendingMirrorUpdates < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :project_mirror_data, [:last_update_at, :retry_count]
-  end
-
-  def down
-    remove_concurrent_index :project_mirror_data, [:last_update_at, :retry_count]
-  end
-end

db/migrate/20190604091310_add_ldap_membership_lock.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddLdapMembershipLock < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default(:application_settings, :lock_memberships_to_ldap, :boolean, default: false) # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column(:application_settings, :lock_memberships_to_ldap)
-  end
-end

db/migrate/20190604184643_fix_pool_repository_source_project_id.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class FixPoolRepositorySourceProjectId < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  def up
-    execute "UPDATE pool_repositories SET source_project_id = (SELECT MIN(id) FROM projects WHERE pool_repository_id = pool_repositories.id) WHERE pool_repositories.source_project_id IS NULL"
-  end
-
-  def down
-    # nothing to do her
-  end
-end

db/migrate/20190605104727_add_default_project_deletion_protection_to_application_settings.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddDefaultProjectDeletionProtectionToApplicationSettings < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    # rubocop:disable Migration/AddColumnWithDefault
-    add_column_with_default :application_settings, :default_project_deletion_protection, :boolean, default: false, allow_null: false
-    # rubocop:enable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column :application_settings, :default_project_deletion_protection
-  end
-end

db/migrate/20190605184422_create_namespace_aggregation_schedules.rb

-# frozen_string_literal: true
-
-class CreateNamespaceAggregationSchedules < ActiveRecord::Migration[5.1]
-  DOWNTIME = false
-
-  def change
-    create_table :namespace_aggregation_schedules, id: false, primary_key: :namespace_id do |t|
-      t.integer :namespace_id, null: false, primary_key: true
-
-      t.index :namespace_id, unique: true
-      t.foreign_key :namespaces, column: :namespace_id, on_delete: :cascade
-    end
-  end
-end

db/migrate/20190606014128_add_last_ci_minutes_notification_at_to_namespaces.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddLastCiMinutesNotificationAtToNamespaces < ActiveRecord::Migration[5.1]
-  DOWNTIME = false
-
-  def change
-    add_column :namespaces, :last_ci_minutes_notification_at, :datetime_with_timezone # rubocop:disable Migration/AddColumnsToWideTables
-  end
-end

db/migrate/20190606034427_add_lfs_object_id_index_to_lfs_objects_projects.rb

-# frozen_string_literal: true
-
-class AddLfsObjectIdIndexToLfsObjectsProjects < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :lfs_objects_projects, :lfs_object_id
-  end
-
-  def down
-    remove_concurrent_index :lfs_objects_projects, :lfs_object_id
-  end
-end

db/migrate/20190606054649_change_operations_feature_flags_clients_token_not_null.rb

-# frozen_string_literal: true
-
-class ChangeOperationsFeatureFlagsClientsTokenNotNull < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    change_column_null :operations_feature_flags_clients, :token, true
-  end
-end

db/migrate/20190606054742_add_token_encrypted_to_operations_feature_flags_clients.rb

-# frozen_string_literal: true
-
-class AddTokenEncryptedToOperationsFeatureFlagsClients < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  # rubocop:disable Migration/PreventStrings
-  def change
-    add_column :operations_feature_flags_clients, :token_encrypted, :string
-  end
-  # rubocop:enable Migration/PreventStrings
-end

db/migrate/20190606054832_add_index_to_operations_feature_flags_clients_token_encrypted.rb

-# frozen_string_literal: true
-
-class AddIndexToOperationsFeatureFlagsClientsTokenEncrypted < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :operations_feature_flags_clients, [:project_id, :token_encrypted],
-      unique: true, name: "index_feature_flags_clients_on_project_id_and_token_encrypted"
-  end
-
-  def down
-    remove_concurrent_index_by_name :operations_feature_flags_clients, "index_feature_flags_clients_on_project_id_and_token_encrypted"
-  end
-end

db/migrate/20190606202100_add_name_to_badges.rb

-# frozen_string_literal: true
-
-class AddNameToBadges < ActiveRecord::Migration[5.0]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    add_column :badges, :name, :string, null: true, limit: 255 # rubocop:disable Migration/PreventStrings
-  end
-end

db/migrate/20190607085356_add_source_to_pages_domains.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddSourceToPagesDomains < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_column_with_default(:pages_domains, :certificate_source, :smallint, default: 0) # rubocop:disable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column(:pages_domains, :certificate_source)
-  end
-end

db/migrate/20190607145325_add_pages_domains_ssl_renew_index.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddPagesDomainsSslRenewIndex < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  INDEX_NAME = 'index_pages_domains_need_auto_ssl_renewal'
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index(:pages_domains, [:certificate_source, :certificate_valid_not_after],
-                         where: "auto_ssl_enabled = #{::Gitlab::Database.true_value}", name: INDEX_NAME)
-  end
-
-  def down
-    remove_concurrent_index(:pages_domains, [:certificate_source, :certificate_valid_not_after],
-                            where: "auto_ssl_enabled = #{::Gitlab::Database.true_value}", name: INDEX_NAME)
-  end
-end

db/migrate/20190607190856_add_index_to_users_public_emails.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddIndexToUsersPublicEmails < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :users, [:public_email],
-                         where: "public_email != ''"
-  end
-
-  def down
-    remove_concurrent_index :users, [:public_email],
-                         where: "public_email != ''"
-  end
-end

db/migrate/20190607205656_add_wiki_columns_to_index_status.rb

-# frozen_string_literal: true
-
-class AddWikiColumnsToIndexStatus < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    add_column :index_statuses, :last_wiki_commit, :binary
-    add_column :index_statuses, :wiki_indexed_at, :datetime_with_timezone
-  end
-end

db/migrate/20190610142825_add_index_to_members_invite_email.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddIndexToMembersInviteEmail < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    add_concurrent_index :members, [:invite_email]
-  end
-
-  def down
-    remove_concurrent_index :members, [:invite_email]
-  end
-end

db/migrate/20190611090827_add_time_tracking_limit_to_hours_to_application_settings.rb

-# frozen_string_literal: true
-
-# See http://doc.gitlab.com/ce/development/migration_style_guide.html
-# for more information on how to write migrations for GitLab.
-
-class AddTimeTrackingLimitToHoursToApplicationSettings < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  # Set this constant to true if this migration requires downtime.
-  DOWNTIME = false
-
-  disable_ddl_transaction!
-
-  def up
-    # rubocop:disable Migration/AddColumnWithDefault
-    add_column_with_default :application_settings, :time_tracking_limit_to_hours, :boolean, default: false, allow_null: false
-    # rubocop:enable Migration/AddColumnWithDefault
-  end
-
-  def down
-    remove_column :application_settings, :time_tracking_limit_to_hours
-  end
-end

db/migrate/20190611100201_add_geo_container_repository_updated_events_table.rb

-# frozen_string_literal: true
-
-class AddGeoContainerRepositoryUpdatedEventsTable < ActiveRecord::Migration[5.1]
-  include Gitlab::Database::MigrationHelpers
-
-  DOWNTIME = false
-
-  def change
-    create_table :geo_container_repository_updated_events, force: :cascade do |t|
-      t.integer :container_repository_id, null: false
-
-      t.index :container_repository_id, name: :idx_geo_con_rep_updated_events_on_container_repository_id, using: :btree
-    end
-
-    add_column :geo_event_log, :container_repository_updated_event_id, :bigint
-  end
-end