Method open

sql/sql_cursor.cc:243–274

int Materialized_cursor::open(JOIN *join __attribute__((unused)))
{
  THD *thd= fake_unit.thd;
  int rc;
  Query_arena backup_arena;

  thd->set_n_backup_active_arena(this, &backup_arena);

  /* Create a list of fields and start sequential scan. */

  rc= result->prepare(item_list, &fake_unit);
  rc= !rc && table->file->ha_rnd_init_with_error(TRUE);
  is_rnd_inited= !rc;

  thd->restore_active_arena(this, &backup_arena);

  /* Commit or rollback metadata in the client-server protocol. */

  if (!rc)
  {
    thd->server_status|= SERVER_STATUS_CURSOR_EXISTS;
    result->send_eof();
  }
  else
  {
    result->abort_result_set();
  }

  on_table_fill_finished();

  return rc;
}


/**