Method execute_inner

sql/sql_delete.cc:2139–2206

*/

bool Sql_cmd_delete::execute_inner(THD *thd)
{
  Running_stmt_guard guard(thd, active_dml_stmt::DELETING_STMT);

  if (!multitable)
  {
    if (lex->has_returning())
    {
      select_result *sel_result= NULL;
      delete result;
      /* This is DELETE ... RETURNING.  It will return output to the client */
      if (thd->lex->analyze_stmt)
      {
        /*
          Actually, it is ANALYZE .. DELETE .. RETURNING. We need to produce
          output and then discard it.
        */
        sel_result= new (thd->mem_root) select_send_analyze(thd);
        save_protocol= thd->protocol;
        thd->protocol= new Protocol_discard(thd);
      }
      else
      {
        if (!lex->result && !(sel_result= new (thd->mem_root) select_send(thd)))
          return true;
      }
      result= lex->result ? lex->result : sel_result;
    }
  }

  bool res= multitable ? Sql_cmd_dml::execute_inner(thd)
                         : delete_from_single_table(thd);

  res|= thd->is_error();

  if (save_protocol)
  {
    delete thd->protocol;
    thd->protocol= save_protocol;
  }
  {
    if (unlikely(res))
    {
      if (multitable)
        result->abort_result_set();
    }
    else
    {
      if (thd->lex->describe || thd->lex->analyze_stmt)
      {
        bool extended= thd->lex->describe & DESCRIBE_EXTENDED;
        res= thd->lex->explain->send_explain(thd, extended);
      }
    }
  }

  if (result)
  {