我编写了以下匿名PL SQL块。
然而,行
dbms_output.put_line(total_tckt_col.LAST)
为我输出366
(在DBMS_OUTPUT中是SQL Developer),当没有设置限制时这是正确的。
如果100
语句中的限制设置为FETCH
,那么dbms_output.put_line(total_tckt_col.LAST)
会给我66
。
我在这里做错了什么?
DECLARE
CURSOR cur_total_tckt
is
select t.ticket_id ticket_id, t.created_date created_date, t.created_by created_by, t.ticket_status ticket_status,
t.last_changed last_changed, h.created_date closed_date
from n01.cc_ticket_info t
inner join n01.cc_ticket_status_history h
on (t.ticket_id = h.ticket_id)
where t.last_changed >= '6/28/2012 17:28:59' and t.last_changed < (sysdate + interval '1' day);
type total_tckt_colcn
is
TABLE OF cur_total_tckt%rowtype;
total_tckt_col total_tckt_colcn;
total_coach_col total_tckt_colcn;
begin
total_tckt_col := total_tckt_colcn ();
total_coach_col := total_tckt_colcn ();
OPEN cur_total_tckt;
loop
fetch cur_total_tckt bulk collect into total_tckt_col;
-- fetch cur_total_tckt bulk collect into total_tckt_col limit 100;
EXIT
WHEN (cur_total_tckt%NOTFOUND);
END LOOP ;
CLOSE cur_total_tckt;
dbms_output.put_line(total_tckt_col.LAST);
FOR i IN total_tckt_col.first..total_tckt_col.last
LOOP
dbms_output.put_line(i);
END LOOP;
end;
答案 0 :(得分:3)
问题是当您将限制设置为100进行循环时,您将删除之前的获取结果。
所以3次获取100行,每次循环时都会被删除,并且在最后一次获取66时,所以你得到66的结果。
您需要积累所有结果以获得正确的计数。
要正确使用带限制的批量收集,请参阅此示例:
PROCEDURE process_all_rows (limit_in IN PLS_INTEGER DEFAULT 100)
IS
CURSOR employees_cur
IS
SELECT * FROM employees;
TYPE employees_aat IS TABLE OF employees_cur%ROWTYPE
INDEX BY PLS_INTEGER;
l_employees employees_aat;
BEGIN
OPEN employees_cur;
LOOP
FETCH employees_cur
BULK COLLECT INTO l_employees LIMIT limit_in;
FOR indx IN 1 .. l_employees.COUNT
LOOP
analyze_compensation (l_employees(indx));
END LOOP;
EXIT WHEN l_employees.COUNT < limit_in;
END LOOP;
CLOSE employees_cur;
END process_all_rows;
所以你的for循环应该驻留在普通循环中,你可以在其中批量收集。
所以正确的代码是:
DECLARE
CURSOR cur_total_tckt
is
select t.ticket_id ticket_id, t.created_date created_date, t.created_by created_by, t.ticket_status ticket_status,
t.last_changed last_changed, h.created_date closed_date
from n01.cc_ticket_info t
inner join n01.cc_ticket_status_history h
on (t.ticket_id = h.ticket_id)
where t.last_changed >= '6/28/2012 17:28:59' and t.last_changed < (sysdate + interval '1' day);
type total_tckt_colcn
is
TABLE OF cur_total_tckt%rowtype;
total_tckt_col total_tckt_colcn;
total_coach_col total_tckt_colcn;
begin
total_tckt_col := total_tckt_colcn ();
total_coach_col := total_tckt_colcn ();
OPEN cur_total_tckt;
loop
fetch cur_total_tckt bulk collect into total_tckt_col limit 100;
dbms_output.put_line(total_tckt_col.LAST);
FOR i IN total_tckt_col.first..total_tckt_col.last
LOOP
dbms_output.put_line(i);
END LOOP;
EXIT
WHEN (cur_total_tckt%NOTFOUND);
END LOOP ;
CLOSE cur_total_tckt;
end;