Method is_allowed_hash_join_access

sql/sql_select.cc:32843–32858

}

bool JOIN::is_allowed_hash_join_access(const TABLE *table)
{
  /*
    If both NO_BNL() and NO_BKA() hints are specified then
    hash join is not allowed
  */
  if (!hint_table_state(thd, table, BNL_HINT_ENUM, true) &&
      !hint_table_state(thd, table, BKA_HINT_ENUM, true))
  {
    return false;
  }
  return allowed_join_cache_types & JOIN_CACHE_HASHED_BIT &&
         (max_allowed_join_cache_level > JOIN_CACHE_HASHED_BIT ||
           hint_table_state(thd, table, BNL_HINT_ENUM, false) ||
           hint_table_state(thd, table, BKA_HINT_ENUM, false));
}

/**
  Save a query execution plan so that the caller can revert to it if needed,