Method insert

sql/sql_db.cc:169–189

  }

  void insert(const char *s)
  {
    auto len= strlen(s);
    auto ls= (LEX_STRING *) my_malloc(key_memory_dbnames_cache,
                                      sizeof(LEX_STRING) + strlen(s) + 1, 0);

    if (!ls)
      return;

    ls->length= len;
    ls->str= (char *) (ls + 1);

    memcpy(ls->str, s, len + 1);
    mysql_rwlock_wrlock(&m_lock);
    bool found= m_set.find(s, len) != 0;
    if (!found)
      m_set.insert(ls);
    mysql_rwlock_unlock(&m_lock);
    if (found)
      my_free(ls);
  }

  void clear()
  {