Initialize conversion of ci_builds_runner_session.build_id to bigint

See https://gitlab.com/gitlab-org/gitlab/-/issues/328444.

app/models/ci/build_runner_session.rb

@@ -5,6 +5,9 @@ module Ci
   # Data will be removed after transitioning from running to any state.
   class BuildRunnerSession < ApplicationRecord
     extend Gitlab::Ci::Model
+    include IgnorableColumns
+
+    ignore_columns :build_id_convert_to_bigint, remove_with: '14.1', remove_after: '2021-07-22'
 
     TERMINAL_SUBPROTOCOL = 'terminal.gitlab.com'
     DEFAULT_SERVICE_NAME = 'build'

changelogs/unreleased/328444-convert-ci-builds-runner-session-build-id-to-bigint.yml

+---
+title: Initialize conversion of ci_builds_runner_session.build_id to bigint
+merge_request: 60366
+author:
+type: other

db/migrate/20210427084924_initialize_conversion_of_ci_builds_runner_session_to_bigint.rb

+# frozen_string_literal: true
+
+class InitializeConversionOfCiBuildsRunnerSessionToBigint < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  TABLE = :ci_builds_runner_session
+  COLUMNS = %i(build_id)
+
+  def up
+    initialize_conversion_of_integer_to_bigint(TABLE, COLUMNS)
+  end
+
+  def down
+    revert_initialize_conversion_of_integer_to_bigint(TABLE, COLUMNS)
+  end
+end

db/post_migrate/20210427085020_backfill_ci_builds_runner_session_for_bigint_conversion.rb

+# frozen_string_literal: true
+
+class BackfillCiBuildsRunnerSessionForBigintConversion < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  TABLE = :ci_builds_runner_session
+  COLUMNS = %i(build_id)
+
+  def up
+    return unless should_run?
+
+    backfill_conversion_of_integer_to_bigint(TABLE, COLUMNS)
+  end
+
+  def down
+    return unless should_run?
+
+    revert_backfill_conversion_of_integer_to_bigint(TABLE, COLUMNS)
+  end
+
+  private
+
+  def should_run?
+    Gitlab.dev_or_test_env? || Gitlab.com?
+  end
+end

db/schema_migrations/20210427084924

+a2fcf3576de4ee5afdab8d07ffc6c2c8f96d6cc85c332f6ab69f2936bf9e58ae
\ No newline at end of file

db/schema_migrations/20210427085020

+2e30910d106dd6805f42ffc226d9008b826fa88eaec7091960e11db850b714c4
\ No newline at end of file

db/structure.sql

@@ -125,6 +125,15 @@ BEGIN
 END;
 $$;
 
+CREATE FUNCTION trigger_51ab7cef8934() RETURNS trigger
+    LANGUAGE plpgsql
+    AS $$
+BEGIN
+  NEW."build_id_convert_to_bigint" := NEW."build_id";
+  RETURN NEW;
+END;
+$$;
+
 CREATE FUNCTION trigger_69523443cc10() RETURNS trigger
     LANGUAGE plpgsql
     AS $$
@@ -10486,7 +10495,8 @@ CREATE TABLE ci_builds_runner_session (
     build_id integer NOT NULL,
     url character varying NOT NULL,
     certificate character varying,
-    "authorization" character varying
+    "authorization" character varying,
+    build_id_convert_to_bigint bigint DEFAULT 0 NOT NULL
 );
 
 CREATE SEQUENCE ci_builds_runner_session_id_seq
@@ -24768,6 +24778,8 @@ CREATE TRIGGER trigger_21e7a2602957 BEFORE INSERT OR UPDATE ON ci_build_needs FO
 
 CREATE TRIGGER trigger_3f6129be01d2 BEFORE INSERT OR UPDATE ON ci_builds FOR EACH ROW EXECUTE PROCEDURE trigger_3f6129be01d2();
 
+CREATE TRIGGER trigger_51ab7cef8934 BEFORE INSERT OR UPDATE ON ci_builds_runner_session FOR EACH ROW EXECUTE PROCEDURE trigger_51ab7cef8934();
+
 CREATE TRIGGER trigger_69523443cc10 BEFORE INSERT OR UPDATE ON events FOR EACH ROW EXECUTE PROCEDURE trigger_69523443cc10();
 
 CREATE TRIGGER trigger_8485e97c00e3 BEFORE INSERT OR UPDATE ON ci_sources_pipelines FOR EACH ROW EXECUTE PROCEDURE trigger_8485e97c00e3();