Function process_master_state

sql/sql_table.cc:10482–10517

process_master_state:- process the info->state recieved from master We will comapre master state with alter_result In the case of ROLLBACK_ALTER alter_result > 0 In the case of COMMIT_ALTER alter_result == 0 if the condition is not satisfied we will report error and Return 1. Make sure wait_for_master is called before calling this function This function should be called only at th

  @retval 0 Ok
*/
static int process_master_state(THD *thd, int alter_result,
                                uint64 &start_alter_id, bool if_exists)
{
#ifdef HAVE_REPLICATION
  start_alter_info *info= thd->rgi_slave->sa_info;
  bool partial_alter= false;

  if (info->state == start_alter_state::INVALID)
  {
    /* the caller has not yet called SA logging nor wait for master decision */
    if (!write_bin_log_start_alter(thd, partial_alter, start_alter_id,
                                   if_exists))
      wait_for_master(thd);

    DBUG_ASSERT(!partial_alter);
  }

  /* this function shouldn't be called twice */
  DBUG_ASSERT(start_alter_id);

  start_alter_id= 0;
  if ((info->state == start_alter_state::ROLLBACK_ALTER && alter_result >= 0)
      || (info->state == start_alter_state::COMMIT_ALTER && !alter_result))
  {
    alter_committed(thd, info, thd->rgi_slave->rli->mi);
    return 0;
  }
  else
  {
    thd->is_slave_error= 1;
    return 1;
  }
#else
  return 0;
#endif
}

/*
  Returns a (global unique) identifier of START Alter when slave applier