Slow report - more than 20000 rows

Question

When i use a pagination refresh page take more than minute for every page(much to slow). without pagination less then second. how can i solve pagination without visible loosing performance?

Answer 1

DECLARE
q VARCHAR2 (4000);
BEGIN
q:='select htmldb_item.display_and_save(1,MJA_ID) MJA_ID,htmldb_item.text(2,NOVI_NAZIV_NASELJA) novi_naselja,
htmldb_item.popup_from_lov (4,novi_hpt,''postemjesta'') novi_hpt, HPT, NAZIV_NASELJA, BROJ_OBVEZNIKA, KAT_ISPOSTAVA, vgi, datum_izmjene, redni_broj';
q :=q||' from (select * from mjesta_2005_2 where 1=1';
IF (:p1335_NAZIV_MJESTA IS NOT NULL) THEN
q := q || ' and upper(naziv_naselja) like ''';
q := q ||upper(:p1335_NAZIV_MJESTA)|| '%''';
END IF;
IF (:p1335_VGI is not null)THEN
q:=q||' and :p1335_VGI=VGI';
END IF;
IF (:p1335_KAT is not null)THEN
q:=q||' and :p1335_KAT=KAT_ISPOSTAVA';
END IF;
IF (:p1335_REDNI is not null)THEN
q:=q||' and REDNI_BROJ>:p1335_REDNI ';
END IF;
IF (:p1335_PB is not null and :p1335_PB_DO is null)THEN
q:=q||' and :p1335_PB=HPT';
END IF;
IF (:p1335_PB is not null and :p1335_PB_DO is not null)THEN
q:=q||' and HPT between :p1335_PB and :p1335_PB_DO';
END IF;
IF (:p1335_BO_OD is not null and :p1335_BO_DO is not null) THEN
q:=q||' and broj_obveznika between :p1335_BO_OD and :p1335_BO_DO';
END IF;
IF (:p1335_NPB_OD is not null and :p1335_NPB_DO is not null) THEN
q:=q||' and novi_hpt between :p1335_NPB_OD and :p1335_NPB_DO';
END IF;
q:=q||' order redni_broj)';
RETURN q;
END;
now i found that problem is in htmldb_item.popup_from_lov (4,novi_hpt,''postemjesta'') this column which use this lov query:
select pta_hpt||' '||naziv_mjesta d, pta_hpt r
from mjesta
order by pta_hpt
When i use this "setup" : only :p1335_VGI is not null with select list or search engine pagination with 25 rows on page it takes about a minute.
If htmldb_item.popup_from_lov (4,novi_hpt,''postemjesta'') replace with htmldb_item.text(4,novi_hpt) then same query finish in only 5 seconds.
If i use row ranges x to y (whit previous and next links) pagination it takes about 0.40 s per page not depending is it htmldb_item popup_from_lov or text.
i wish to set some pagination like select list, or search engine, but i also like to keep select list.