Prepare taggings table for bigint conversion

Adds bigint column and triggers to prepare for bigint conversion

Changelog: other
MR: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/62205

config/initializers/0_acts_as_taggable.rb

@@ -9,3 +9,7 @@ ActsAsTaggableOn.tags_counter = false
 # validate that counter cache is disabled
 raise "Counter cache is not disabled" if
     ActsAsTaggableOn::Tagging.reflections["tag"].options[:counter_cache]
+
+ActsAsTaggableOn::Tagging.include IgnorableColumns
+ActsAsTaggableOn::Tagging.ignore_column :id_convert_to_bigint, remove_with: '14.2', remove_after: '2021-08-22'
+ActsAsTaggableOn::Tagging.ignore_column :taggable_id_convert_to_bigint, remove_with: '14.2', remove_after: '2021-08-22'

db/migrate/20210520133032_initialize_conversion_of_taggings_to_bigint.rb

+# frozen_string_literal: true
+
+class InitializeConversionOfTaggingsToBigint < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  TABLE = :taggings
+  COLUMNS = %i(id taggable_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/migrate/20210520133440_backfill_taggings_for_bigint_conversion.rb

+# frozen_string_literal: true
+
+class BackfillTaggingsForBigintConversion < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  TABLE = :taggings
+  COLUMNS = %i(id taggable_id)
+
+  def up
+    backfill_conversion_of_integer_to_bigint TABLE, COLUMNS, batch_size: 15000, sub_batch_size: 100
+  end
+
+  def down
+    revert_backfill_conversion_of_integer_to_bigint TABLE, COLUMNS
+  end
+end

db/schema_migrations/20210520133032

+eddbcd18c17f9017a2cdfb6fc0144dcfcb539d3617271722b2918bdbe48c481a
\ No newline at end of file

db/schema_migrations/20210520133440

+3ee15db28406522a5fb591395dd3d4a46b10e958339dc60ded3751e23096864d
\ No newline at end of file

db/structure.sql

@@ -161,6 +161,16 @@ BEGIN
 END;
 $$;
 
+CREATE FUNCTION trigger_aebe8b822ad3() RETURNS trigger
+    LANGUAGE plpgsql
+    AS $$
+BEGIN
+  NEW."id_convert_to_bigint" := NEW."id";
+  NEW."taggable_id_convert_to_bigint" := NEW."taggable_id";
+  RETURN NEW;
+END;
+$$;
+
 CREATE FUNCTION trigger_be1804f21693() RETURNS trigger
     LANGUAGE plpgsql
     AS $$
@@ -18207,7 +18217,9 @@ CREATE TABLE taggings (
     tagger_id integer,
     tagger_type character varying,
     context character varying,
-    created_at timestamp without time zone
+    created_at timestamp without time zone,
+    id_convert_to_bigint bigint DEFAULT 0 NOT NULL,
+    taggable_id_convert_to_bigint bigint
 );
 
 CREATE SEQUENCE taggings_id_seq
@@ -25250,6 +25262,8 @@ CREATE TRIGGER trigger_8485e97c00e3 BEFORE INSERT OR UPDATE ON ci_sources_pipeli
 
 CREATE TRIGGER trigger_91dc388a5fe6 BEFORE INSERT OR UPDATE ON ci_build_trace_sections FOR EACH ROW EXECUTE FUNCTION trigger_91dc388a5fe6();
 
+CREATE TRIGGER trigger_aebe8b822ad3 BEFORE INSERT OR UPDATE ON taggings FOR EACH ROW EXECUTE FUNCTION trigger_aebe8b822ad3();
+
 CREATE TRIGGER trigger_be1804f21693 BEFORE INSERT OR UPDATE ON ci_job_artifacts FOR EACH ROW EXECUTE FUNCTION trigger_be1804f21693();
 
 CREATE TRIGGER trigger_cf2f9e35f002 BEFORE INSERT OR UPDATE ON ci_build_trace_chunks FOR EACH ROW EXECUTE FUNCTION trigger_cf2f9e35f002();