Prepare indexes for bigint column conversions

Add migrations to create indexes asynchronously for tables that need to
have columns converted from int to bigint. Creating the indexes
asynchronously will preventing the column swap migrations from running
for an excessive length of time.

Changelog: other

db/post_migrate/20210804151444_prepare_indexes_for_ci_job_artifact_bigint_conversion.rb

+# frozen_string_literal: true
+
+class PrepareIndexesForCiJobArtifactBigintConversion < ActiveRecord::Migration[6.1]
+  include Gitlab::Database::MigrationHelpers
+
+  def up
+    prepare_async_index :ci_job_artifacts, :id_convert_to_bigint, unique: true,
+      name: :index_ci_job_artifact_on_id_convert_to_bigint
+
+    prepare_async_index :ci_job_artifacts, [:project_id, :id_convert_to_bigint], where: 'file_type = 18',
+      name: :index_ci_job_artifacts_for_terraform_reports_bigint
+
+    prepare_async_index :ci_job_artifacts, :id_convert_to_bigint, where: 'file_type = 18',
+      name: :index_ci_job_artifacts_id_for_terraform_reports_bigint
+
+    prepare_async_index :ci_job_artifacts, [:expire_at, :job_id_convert_to_bigint],
+      name: :index_ci_job_artifacts_on_expire_at_and_job_id_bigint
+
+    prepare_async_index :ci_job_artifacts, [:job_id_convert_to_bigint, :file_type], unique: true,
+      name: :index_ci_job_artifacts_on_job_id_and_file_type_bigint
+  end
+
+  def down
+    unprepare_async_index_by_name :ci_job_artifacts, :index_ci_job_artifacts_on_job_id_and_file_type_bigint
+
+    unprepare_async_index_by_name :ci_job_artifacts, :index_ci_job_artifacts_on_expire_at_and_job_id_bigint
+
+    unprepare_async_index_by_name :ci_job_artifacts, :index_ci_job_artifacts_id_for_terraform_reports_bigint
+
+    unprepare_async_index_by_name :ci_job_artifacts, :index_ci_job_artifacts_for_terraform_reports_bigint
+
+    unprepare_async_index_by_name :ci_job_artifacts, :index_ci_job_artifact_on_id_convert_to_bigint
+  end
+end

db/post_migrate/20210804153307_prepare_indexes_for_tagging_bigint_conversion.rb

+# frozen_string_literal: true
+
+class PrepareIndexesForTaggingBigintConversion < ActiveRecord::Migration[6.1]
+  include Gitlab::Database::MigrationHelpers
+
+  def up
+    prepare_async_index :taggings, :id_convert_to_bigint, unique: true,
+      name: :index_taggings_on_id_convert_to_bigint
+
+    prepare_async_index :taggings, [:taggable_id_convert_to_bigint, :taggable_type],
+      name: :i_taggings_on_taggable_id_convert_to_bigint_and_taggable_type
+
+    prepare_async_index :taggings, [:taggable_id_convert_to_bigint, :taggable_type, :context],
+      name: :i_taggings_on_taggable_bigint_and_taggable_type_and_context
+
+    prepare_async_index :taggings, [:tag_id, :taggable_id_convert_to_bigint, :taggable_type, :context, :tagger_id, :tagger_type],
+      unique: true, name: :taggings_idx_tmp
+  end
+
+  def down
+    unprepare_async_index_by_name :taggings, :taggings_idx_tmp
+
+    unprepare_async_index_by_name :taggings, :i_taggings_on_taggable_bigint_and_taggable_type_and_context
+
+    unprepare_async_index_by_name :taggings, :i_taggings_on_taggable_id_convert_to_bigint_and_taggable_type
+
+    unprepare_async_index_by_name :taggings, :index_taggings_on_id_convert_to_bigint
+  end
+end

db/post_migrate/20210804154407_prepare_indexes_for_ci_stage_bigint_conversion.rb

+# frozen_string_literal: true
+
+class PrepareIndexesForCiStageBigintConversion < ActiveRecord::Migration[6.1]
+  include Gitlab::Database::MigrationHelpers
+
+  def up
+    prepare_async_index :ci_stages, :id_convert_to_bigint, unique: true,
+      name: :index_ci_stages_on_id_convert_to_bigint
+
+    prepare_async_index :ci_stages, [:pipeline_id, :id_convert_to_bigint], where: 'status in (0, 1, 2, 8, 9, 10)',
+      name: :index_ci_stages_on_pipeline_id_and_id_convert_to_bigint
+  end
+
+  def down
+    unprepare_async_index_by_name :ci_stages, :index_ci_stages_on_pipeline_id_and_id_convert_to_bigint
+
+    unprepare_async_index_by_name :ci_stages, :index_ci_stages_on_id_convert_to_bigint
+  end
+end

db/schema_migrations/20210804151444

+4a6676e9185a99070751c91c71a7a9e6a845426d68567abf80a2e414251e5805
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db/schema_migrations/20210804153307

+d73756410c7f37662c50bb05c372e6ac32ba81f232c07debcd42d1f679eb74ef
\ No newline at end of file

db/schema_migrations/20210804154407

+ab7ee98704e844de4a3ba3ae14ea64dd46539e63d49c7c7e0d67ed03ebc3bbd4
\ No newline at end of file