Bug #31355547: RUN CLANG-TIDY MODERNIZE-USE-OVERRIDE OVER THE CODE BASE

Post-push fix: Fix some Clang warnings in InnoDB. Change-Id: I89d9d63ea0ef61dbdbecd6aa5c7290677cc6adee

Author: Steinar H. Gunderson

storage/innobase/include/sync0types.h

@@ -1066,7 +1066,7 @@ struct btrsea_sync_check : public sync_check_functor_t {
  : m_result(), m_has_search_latch(has_search_latch) {}
 
  /** Destructor */
- virtual ~btrsea_sync_check() {}
+ ~btrsea_sync_check() override {}
 
  /** Called for every latch owned by the calling thread.
  @param[in]	level	Level of the existing latch
@@ -1129,7 +1129,7 @@ struct dict_sync_check : public sync_check_functor_t {
  : m_result(), m_dict_mutex_allowed(dict_mutex_allowed) {}
 
  /** Destructor */
- virtual ~dict_sync_check() {}
+ ~dict_sync_check() override {}
 
  /** Check the latching constraints
  @param[in]	level	The level held by the thread */

storage/innobase/row/row0pread.cc

@@ -472,7 +472,8 @@ Parallel_reader::Scan_ctx::create_persistent_cursor(
 }
 
 bool Parallel_reader::Ctx::move_to_next_node(PCursor *pcursor, mtr_t *mtr) {
- page_cur_t *cur = m_range.first->m_pcur->get_page_cur();
+ page_cur_t *cur MY_ATTRIBUTE((unused)) =
+ m_range.first->m_pcur->get_page_cur();
 
  if (m_scan_ctx->m_config.m_read_ahead) {
  page_no_t next_page_no = btr_page_get_next(page_cur_get_page(cur), mtr);