array(5) {
  ["str_query"]=>string(702) "select  t.*, s.V1, s.V2, s.T1,
      round((t.RGT-t.LFT-1)/2,0) AS kidcount,
      ((min(u.RGT)-t.RGT-(t.LFT>1))/2) <= 0 AS is_last,
      (( (t.LFT-max(u.LFT)<=1) )) AS is_first,count(distinct u.ID_KAT) as level from `kat` u, `kat` t
              left join string_kat s on s.S_TABLE='kat' and s.FK=t.ID_KAT
              and s.BF_LANG=if(t.BF_LANG_KAT & 128, 128, 1 << floor(log(t.BF_LANG_KAT+0.5)/log(2))) left join string st on st.S_TABLE='kat' and st.FK=u.ID_KAT
      and u.BF_LANG_KAT=if (u.BF_LANG_KAT & 128, 128, 1 << floor(log(u.BF_LANG_KAT+0.5)/log(2)))
      WHERE t.ROOT = 4 AND u.ROOT = 4
        AND t.LFT BETWEEN u.LFT AND u.RGT and t.LFT<>u.LFT 
      GROUP BY t.LFT order by LFT"
  ["rsrc"]=>bool(false)
  ["flt_runtime"]=>float(0.00063490867614746)
  ["int_result"]=>int(1054)
  ["str_error"]=>string(40) "Unknown column 'u.ID_KAT' in 'on clause'"
}