Remove users.bio column

changelogs/unreleased/226989-remove-users-bio-column.yml

+---
+title: Remove unused users.bio database column
+merge_request: 40269
+author:
+type: other

db/post_migrate/20200824130028_remove_index_on_users_bio.rb

+# frozen_string_literal: true
+
+class RemoveIndexOnUsersBio < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  BACKGROUND_MIGRATION_CLASS = 'MigrateUsersBioToUserDetails'
+  INDEX_NAME = 'tmp_idx_on_user_id_where_bio_is_filled'
+
+  disable_ddl_transaction!
+
+  def up
+    Gitlab::BackgroundMigration.steal(BACKGROUND_MIGRATION_CLASS)
+    remove_concurrent_index_by_name(:users, INDEX_NAME)
+  end
+
+  def down
+    add_concurrent_index :users, :id, where: "(COALESCE(bio, '') IS DISTINCT FROM '')", name: INDEX_NAME
+  end
+end

db/post_migrate/20200824130447_remove_users_bio_column.rb

+# frozen_string_literal: true
+
+class RemoveUsersBioColumn < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    with_lock_retries do
+      remove_column :users, :bio
+    end
+  end
+
+  def down
+    with_lock_retries do
+      add_column :users, :bio, :string # rubocop: disable Migration/AddColumnsToWideTables
+    end
+  end
+end

db/schema_migrations/20200824130028

+891f1660592c4443aeced7594cea391066cc79b54b40c67a8c973eb6959bf6f1
\ No newline at end of file

db/schema_migrations/20200824130447

+e6dcd20fe77c443999aa2373e0acdd77eb68c3a6f0d6d65e86b7f85ac97ddb9a
\ No newline at end of file

db/structure.sql

@@ -16114,7 +16114,6 @@ CREATE TABLE public.users (
     skype character varying DEFAULT ''::character varying NOT NULL,
     linkedin character varying DEFAULT ''::character varying NOT NULL,
     twitter character varying DEFAULT ''::character varying NOT NULL,
-    bio character varying,
     failed_attempts integer DEFAULT 0,
     locked_at timestamp without time zone,
     username character varying,
@@ -21115,8 +21114,6 @@ CREATE INDEX terraform_states_verification_failure_partial ON public.terraform_s
 
 CREATE INDEX tmp_build_stage_position_index ON public.ci_builds USING btree (stage_id, stage_idx) WHERE (stage_idx IS NOT NULL);
 
-CREATE INDEX tmp_idx_on_user_id_where_bio_is_filled ON public.users USING btree (id) WHERE ((COALESCE(bio, ''::character varying))::text IS DISTINCT FROM ''::text);
-
 CREATE INDEX tmp_index_for_email_unconfirmation_migration ON public.emails USING btree (id) WHERE (confirmed_at IS NOT NULL);
 
 CREATE UNIQUE INDEX unique_merge_request_metrics_by_merge_request_id ON public.merge_request_metrics USING btree (merge_request_id);