Method execute_loop

sql/sql_prepare.cc:4654–4770

*/

bool
Prepared_statement::execute_loop(String *expanded_query,
                                 bool open_cursor,
                                 select_result *result_arg,
                                 Server_side_cursor **cursor_arg,
                                 const InstrSlice &instrs_set_placeholder,
                                 uchar *packet,
                                 uchar *packet_end)
{
  DBUG_ASSERT(result_arg);
  DBUG_ASSERT(cursor_arg);
  Reprepare_observer reprepare_observer;
  bool error;
  iterations= FALSE;
  bool params_are_set= false;

  /*
    - In mysql_sql_stmt_execute() we hide all "external" Items
      e.g. those created in the "SET STATEMENT" part of the "EXECUTE" query.
    - In case of mysqld_stmt_execute() there should not be "external" Items.
  */
  DBUG_ASSERT(thd->free_list == NULL);

  if (lex->needs_reprepare)
  {
    /*
      Something has happened on previous execution that requires us to
      re-prepare before we try to execute.
    */
    lex->needs_reprepare= false;
    goto start_with_reprepare;
  }

  /* Check if we got an error when sending long data */
  if (unlikely(state == Query_arena::STMT_ERROR))
  {
    my_message(last_errno, last_error, MYF(0));
    return TRUE;
  }

reexecute:
  if (!params_are_set && set_parameters(expanded_query,
                                        instrs_set_placeholder,
                                        packet, packet_end))
    return TRUE;
  params_are_set= true;
#ifdef WITH_WSREP
  if (thd->wsrep_delayed_BF_abort)
  {
    WSREP_DEBUG("delayed BF abort, quitting execute_loop, stmt: %d", id);
    return TRUE;
  }
#endif /* WITH_WSREP */

  // Make sure that reprepare() did not create any new Items.
  DBUG_ASSERT(thd->free_list == NULL);

  /*