Prepare ci_builds swap indexes for async creation

Add a new migration that prepares remaining indexes for ci_builds
int4->int8 column swaps to be created asynchronously

Changelog: other

db/post_migrate/20210901184511_prepare_async_indexes_for_ci_builds.rb

+# frozen_string_literal: true
+
+class PrepareAsyncIndexesForCiBuilds < Gitlab::Database::Migration[1.0]
+  def up
+    prepare_async_index :ci_builds, :stage_id_convert_to_bigint, name: :index_ci_builds_on_converted_stage_id
+
+    prepare_async_index :ci_builds, [:commit_id, :artifacts_expire_at, :id_convert_to_bigint],
+      where: "type::text = 'Ci::Build'::text
+              AND (retried = false OR retried IS NULL)
+              AND (name::text = ANY (ARRAY['sast'::character varying::text,
+                                           'secret_detection'::character varying::text,
+                                           'dependency_scanning'::character varying::text,
+                                           'container_scanning'::character varying::text,
+                                           'dast'::character varying::text]))",
+      name: :index_ci_builds_on_commit_id_expire_at_and_converted_id
+
+    prepare_async_index :ci_builds, [:project_id, :id_convert_to_bigint],
+      name: :index_ci_builds_on_project_and_converted_id
+
+    prepare_async_index :ci_builds, [:runner_id, :id_convert_to_bigint],
+      order: { id_convert_to_bigint: :desc },
+      name: :index_ci_builds_on_runner_id_and_converted_id_desc
+
+    prepare_async_index :ci_builds, [:resource_group_id, :id_convert_to_bigint],
+      where: 'resource_group_id IS NOT NULL',
+      name: :index_ci_builds_on_resource_group_and_converted_id
+
+    prepare_async_index :ci_builds, [:name, :id_convert_to_bigint],
+      where: "(name::text = ANY (ARRAY['container_scanning'::character varying::text,
+                                       'dast'::character varying::text,
+                                       'dependency_scanning'::character varying::text,
+                                       'license_management'::character varying::text,
+                                       'sast'::character varying::text,
+                                       'secret_detection'::character varying::text,
+                                       'coverage_fuzzing'::character varying::text,
+                                       'license_scanning'::character varying::text])
+                ) AND type::text = 'Ci::Build'::text",
+      name: :index_security_ci_builds_on_name_and_converted_id_parser
+
+    prepare_async_index_from_sql(:ci_builds, :index_ci_builds_runner_id_and_converted_id_pending_covering, <<~SQL.squish)
+        CREATE INDEX CONCURRENTLY index_ci_builds_runner_id_and_converted_id_pending_covering
+        ON ci_builds (runner_id, id_convert_to_bigint) INCLUDE (project_id)
+        WHERE status::text = 'pending'::text AND type::text = 'Ci::Build'::text
+    SQL
+  end
+
+  def down
+    unprepare_async_index_by_name :ci_builds, :index_ci_builds_runner_id_and_converted_id_pending_covering
+
+    unprepare_async_index_by_name :ci_builds, :index_security_ci_builds_on_name_and_converted_id_parser
+
+    unprepare_async_index_by_name :ci_builds, :index_ci_builds_on_resource_group_and_converted_id
+
+    unprepare_async_index_by_name :ci_builds, :index_ci_builds_on_runner_id_and_converted_id_desc
+
+    unprepare_async_index_by_name :ci_builds, :index_ci_builds_on_project_and_converted_id
+
+    unprepare_async_index_by_name :ci_builds, :index_ci_builds_on_commit_id_expire_at_and_converted_id
+
+    unprepare_async_index_by_name :ci_builds, :index_ci_builds_on_converted_stage_id
+  end
+
+  private
+
+  def prepare_async_index_from_sql(table_name, index_name, definition)
+    return unless async_index_creation_available?
+
+    return if index_name_exists?(table_name, index_name)
+
+    async_index = Gitlab::Database::AsyncIndexes::PostgresAsyncIndex.safe_find_or_create_by!(name: index_name) do |rec|
+      rec.table_name = table_name
+      rec.definition = definition
+    end
+
+    Gitlab::AppLogger.info(
+      message: 'Prepared index for async creation',
+      table_name: async_index.table_name,
+      index_name: async_index.name)
+  end
+end

db/schema_migrations/20210901184511

+40780a28f881d4e80bdb6b023f22804c4da735223323c8cf03cfcdcaf5337fe6
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