mysql - LEFT JOIN - losing a line from LEFT table selection -


i have trouble following query:

select  ifnull(t4.itemid,  ifnull(t3.itemid, ifnull(t2.itemid, t1.itemid))) id,  ifnull(t4.parentitemid,  ifnull(t3.parentitemid,  ifnull(t2.parentitemid, t1.parentitemid))) parent,  ifnull(tp4.itemno, ifnull(tp3.itemno, ifnull(tp2.itemno, tp1.itemno))) itemno itemsparents t1 left join itemsdb tp1  on t1.itemid = tp1.id left join itemsparents t2  on t1.itemid = t2.parentitemid left join itemsdb tp2  on t2.itemid = tp2.id left join itemsparents t3  on t2.itemid = t3.parentitemid left join itemsdb tp3  on t3.itemid = tp3.id left join itemsparents t4  on t3.itemid = t4.parentitemid left join itemsdb tp4  on t4.itemid = tp4.id t1.parentitemid =  ( select id  itemsdb  itemnoint = 359 )

this table should return 2 rows (822 , 875) first part of selection , append more rows following itemsparents left joins. appends new rows, 1 row original 2 gets lost.
  822
  859
  834
  846
  810
...so the row 875 got lost.
if remove or incapacitate left join parent items (by "= 1 -- " - commenting out original condition):

select ifnull ( t4.itemid,  ifnull(t3.itemid, ifnull(t2.itemid, t1.itemid))) id,  ifnull(t4.parentitemid,  ifnull(t3.parentitemid,  ifnull(t2.parentitemid, t1.parentitemid))) parent,  ifnull(tp4.itemno,  ifnull(tp3.itemno, ifnull(tp2.itemno, tp1.itemno))) itemno itemsparents t1 left join itemsdb tp1  on t1.itemid = tp1.id left join itemsparents t2  on t1.itemid = 1 -- t2.parentitemid left join itemsdb tp2  on t2.itemid = tp2.id left join itemsparents t3  on t2.itemid = 1 -- t3.parentitemid left join itemsdb tp3  on t3.itemid = tp3.id left join itemsparents t4   -- t4.parentitemid on t3.itemid = 1  left join itemsdb tp4  on t4.itemid = tp4.id t1.parentitemid =  ( select id  itemsdb  itemnoint = 359 )

...i returns correct 2 rows left joined table (822 , 875).

i googled cases of lost rows in left joined table, none of them seems apply case. idea?

regards,

libor

not answer idea, hope have asked finding last row of table in left join,

select lastrowofsubtable.* tablemain outer apply (     select top 1 * tablesub     tablemain.id = tablesub.id     order tablesub.pk_id desc )as lastrowofsubtable

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