Method begin_dataset

sql/sql_prepare.cc:6087–6097

bool Protocol_local::begin_dataset()
{
  MYSQL_DATA *data= alloc_new_dataset();
  if (!data)
    return 1;
  alloc= &data->alloc;
  /* Assume rowlength < 8192 */
  init_alloc_root(PSI_INSTRUMENT_ME, alloc, 8192, 0, MYF(0));
  alloc->min_malloc= sizeof(MYSQL_ROWS);
  return 0;
}


bool Protocol_local::begin_dataset(THD *thd, uint numfields)