我无法执行存储过程以获取结果。目前，我想在toad，eclipse或我正在使用的其他任何内容的输出窗口中显示结果。稍后，我想从程序中访问它们。暂时忽略程序部分，除非它是必不可少的。
我有这个存储过程代码：
create or replace procedure pottyuserange (p_date_format in varchar2,
p_start_date in varchar2,
p_end_date in varchar2,
p_ref_cursor out sys_refcursor)
as
begin
open p_ref_cursor for
select to_char(time_range, p_date_format) as current_date,
lm_search,
ao_search,
ro_search,
fl_search,
total
from (select trunc(time_range) time_range,
sum(case when porta_potty = 'LM' then 1 else 0 end) as lm_search,
sum(case when porta_potty = 'AO' then 1 else 0 end) as ao_search,
sum(case when porta_potty = 'RO' then 1 else 0 end) as ro_search,
sum(case when porta_potty = 'FL' then 1 else 0 end) as fl_search,
sum(case when porta_potty in ('LM', 'AO', 'RO', 'FL') then 1 else 0 end) as total
from core.date_test
where trunc(time_range) >= to_date(p_start_date, p_date_format)
and trunc(time_range) <= to_date(p_end_date, p_date_format)
group by trunc(time_range))
order by time_range asc;
end pottyuserange;
/
我正试图得到这样的结果：
variable rc refcursor;
BEGIN
pottyuserange('YYYY-MM-DD', '2008-10-1', '2010-10-12', :rc);
END;
print rc;
这就是我得到的错误：
ORA-01722: invalid number
ORA-06512: at "core.pottyuserange", line 4
ORA-06512: at line 1
如何正确访问此数据，或将其转换为User-Defined Function？
\
这是我尝试将其变成一个函数：
create or replace function pottyuserange (p_date_format in varchar2,
p_start_date in varchar2,
p_end_date in varchar2)
return result_set as rc sys_refcursor;
BEGIN
OPEN result_set FOR
select to_char(time_range, p_date_format) as current_date,
lm_search,
ao_search,
ro_search,
fl_search,
total
from (select trunc(time_range) time_range,
sum(case when porta_potty = 'LM' then 1 else 0 end) as lm_search,
sum(case when porta_potty = 'AO' then 1 else 0 end) as ao_search,
sum(case when porta_potty = 'RO' then 1 else 0 end) as ro_search,
sum(case when porta_potty = 'FL' then 1 else 0 end) as fl_search,
sum(case when porta_potty in ('LM', 'AO', 'RO', 'FL') then 1 else 0 end) as total
from core.date_test
where trunc(time_range) >= to_date(p_start_date, p_date_format)
and trunc(time_range) <= to_date(p_end_date, p_date_format)
group by trunc(time_range))
order by time_range asc;
return result_set;
end pottyuserange;
/
我上面提到的错误是：PLS-00201: identifier 'RESULT_SET' must be declared
编辑：TIME_RANGE是DATE。 PORTA_POTTY是varchar2。
答案 0 :(得分：1)
（方法1）创建自己的集合类型并更改函数以返回此类型的对象：
create or replace type tp_potty as object (
current_date varchar2(20), lm_search number(6), ao_search number(6),
ro_search number(6), fl_search number(6), total number(6));
create or replace type tp_potty_tbl as table of tp_potty;
create or replace function pottyuserange (p_date_format in varchar2,
p_start_date in varchar2,
p_end_date in varchar2)
return tp_potty_tbl is
potty_tbl tp_potty_tbl;
begin
select cast(multiset(
select to_char(time_range, p_date_format) as current_date,
lm_search, ao_search, ro_search, fl_search, total
from (select trunc(time_range) time_range,
sum(case when porta_potty = 'LM' then 1 else 0 end) lm_search,
sum(case when porta_potty = 'AO' then 1 else 0 end) ao_search,
sum(case when porta_potty = 'RO' then 1 else 0 end) ro_search,
sum(case when porta_potty = 'FL' then 1 else 0 end) fl_search,
sum(case when porta_potty in ('LM', 'AO', 'RO', 'FL')
then 1 else 0 end) total
from date_test
where trunc(time_range) >= to_date(p_start_date, p_date_format)
and trunc(time_range) <= to_date(p_end_date, p_date_format)
group by trunc(time_range))
order by time_range asc) as tp_potty_tbl) into potty_tbl from dual;
return potty_tbl;
end pottyuserange;
现在运行：
select * from table(pottyuserange('yyyy-mm-dd', '2015-10-10', '2015-10-15'))
CURRENT_DATE LM_SEARCH AO_SEARCH RO_SEARCH FL_SEARCH TOTAL
-------------------- --------- --------- --------- --------- -------
2015-10-12 1 0 0 0 1
2015-10-13 1 0 0 0 1
2015-10-14 0 0 0 0 0
（方法2）从PL / SQL块中的函数返回的游标的列表输出如下：
create or replace function potty2 (p_date_format in varchar2,
p_start_date in varchar2,p_end_date in varchar2) return sys_refcursor is
result_set sys_refcursor;
BEGIN
OPEN result_set FOR
select to_char(time_range, p_date_format) as current_date,
lm_search, ao_search, ro_search, fl_search, total
from (select trunc(time_range) time_range,
sum(case when porta_potty = 'LM' then 1 else 0 end) as lm_search,
sum(case when porta_potty = 'AO' then 1 else 0 end) as ao_search,
sum(case when porta_potty = 'RO' then 1 else 0 end) as ro_search,
sum(case when porta_potty = 'FL' then 1 else 0 end) as fl_search,
sum(case when porta_potty in ('LM', 'AO', 'RO', 'FL')
then 1 else 0 end) as total
from date_test
where trunc(time_range) >= to_date(p_start_date, p_date_format)
and trunc(time_range) <= to_date(p_end_date, p_date_format)
group by trunc(time_range))
order by time_range asc;
return result_set;
end potty2;
PL / SQL块：
declare
cur sys_refcursor;
v1 varchar2(20); v2 number(6); v3 number(6); v4 number(6); v5 number(6); v6 number(6);
begin
cur := potty2('yyyy-mm-dd', '2015-10-10', '2015-10-15');
loop
fetch cur into v1, v2, v3, v4, v5, v6;
exit when cur%notfound;
dbms_output.put_line(v1||' '||v2||' '||v3||' '||v4||' '||v5||' '||v6);
end loop;
close cur;
end;
我的回答基于这篇文章：PL/SQL 101 : Understanding Ref Cursors