Remove temp index in oauth_applications table

changelogs/unreleased/remove-tmp-index-oauth-applications.yml

+---
+title: Remove temp index in oauth_applications table
+merge_request: 52157
+author:
+type: other

db/migrate/20210120221743_delete_oauth_applications_tmp_index.rb

+# frozen_string_literal: true
+
+class DeleteOauthApplicationsTmpIndex < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+  INDEX_NAME = 'tmp_index_oauth_applications_on_id_where_trusted'
+
+  disable_ddl_transaction!
+
+  def up
+    remove_concurrent_index_by_name :oauth_applications, INDEX_NAME
+  end
+
+  def down
+    add_concurrent_index :oauth_applications, :id, where: 'trusted = true', name: INDEX_NAME
+  end
+end

db/schema_migrations/20210120221743

+4bf1d277affdfa9ee772d69cb713f49f257140fb58c40bc8659d563b4cc3de29
\ No newline at end of file

db/structure.sql

@@ -23418,8 +23418,6 @@ CREATE UNIQUE INDEX term_agreements_unique_index ON term_agreements USING btree
 
 CREATE INDEX tmp_idx_deduplicate_vulnerability_occurrences ON vulnerability_occurrences USING btree (project_id, report_type, location_fingerprint, primary_identifier_id, id);
 
-CREATE INDEX tmp_index_oauth_applications_on_id_where_trusted ON oauth_applications USING btree (id) WHERE (trusted = true);
-
 CREATE INDEX tmp_index_on_vulnerabilities_non_dismissed ON vulnerabilities USING btree (id) WHERE (state <> 2);
 
 CREATE UNIQUE INDEX uniq_pkgs_deb_grp_architectures_on_distribution_id_and_name ON packages_debian_group_architectures USING btree (distribution_id, name);