Sql 使用参数调用oracle函数
我开始学习pl/sql。我对函数有问题。我创建了这样一个函数Sql 使用参数调用oracle函数,sql,oracle,Sql,Oracle,我开始学习pl/sql。我对函数有问题。我创建了这样一个函数 create or replace FUNCTION GET_RANK_INFO( p_no IN VARCHAR2, p_date IN DATE, p_count IN NUMBER, p_cycle OUT VARCHAR2, p_return_code OUT INTEGER, p_return_
create or replace
FUNCTION GET_RANK_INFO(
p_no IN VARCHAR2,
p_date IN DATE,
p_count IN NUMBER,
p_cycle OUT VARCHAR2,
p_return_code OUT INTEGER,
p_return_desc OUT VARCHAR2)
RETURN SYS_REFCURSOR
AS
.... --Some variable definitions
....
BEGIN
....
...
END;
create or replace
FUNCTION GET_RANK_INFO(
p_no IN VARCHAR2,
p_date IN DATE,
p_count IN NUMBER,
p_cycle OUT VARCHAR2,
p_return_code OUT INTEGER,
p_return_desc OUT VARCHAR2)
RETURN SYS_REFCURSOR
AS
.... --Some variable definitions
....
BEGIN
....
...
END;
从dual中选择获取排名信息（'12345'，截止日期（'2019年3月10日'，'dd/mm/yyyy'），空）
但它给出的错误类似于调用的参数类型的数量不正确
我将调用转换为pl/sql块结构，但代码仍给出相同的错误：
DECLARE
p_no VARCHAR2(200);
p_date DATE;
p_count NUMBER;
p_cycle NUMBER;
p_return_code NUMBER;
p_return_desc VARCHAR2(200);
v_Return SYS_REFCURSOR;
BEGIN
p_no := '23';
p_date := to_date('10/03/2019','dd/mm/yyyy');
p_count:= NULL;
v_Return := GET_RISK_RANK_FN(
p_no=> p_no,
p_date => p_date ,
p_count => p_count,
p_cycle => p_cycle,
p_return_code => p_return_code,
p_return_desc => p_return_desc
);
DBMS_OUTPUT.PUT_LINE('p_cycle= ' || p_cycle);
:p_cycle := p_cycle ;
DBMS_OUTPUT.PUT_LINE('p_return_code = ' || p_return_code );
:p_return_code := p_return_code ;
DBMS_OUTPUT.PUT_LINE('p_return_desc = ' || p_return_desc );
:p_return_desc := p_return_desc ;
:v_Return := v_Return; --<-- Cursor
END;
声明
p_no VARCHAR2（200）；
p_日期；
p_计数；
p_循环数；
p_返回_代码编号；
p_return_desc VARCHAR2（200）；
返回系统参考光标；
开始
p_编号：='23'；
付款日期：=截止日期（'2019年3月10日'，'dd/mm/yyyy'）；
p_计数：=NULL；
v_回报率：=获取风险等级FN(
p_no=>p_no，
p_日期=>p_日期，
p_计数=>p_计数，
p_循环=>p_循环，
p_return_code=>p_return_code，
p_return_desc=>p_return_desc
);
DBMS|u OUTPUT.PUT_LINE（'p|u cycle='| p|u cycle）；
：p_循环：=p_循环；
DBMS_OUTPUT.PUT_LINE（'p_return_code='| | p_return_code'）；
：p_return_code:=p_return_code；
DBMS_OUTPUT.PUT_LINE（'p_return_desc='| | p_return_desc）；
：p_return_desc:=p_return_desc；
：v_Return:=v_Return-- 如果函数中有OUT
参数，则无法从SQL查询中调用该参数
此外，如果函数中有任何DML，则无法在SQL查询中调用该函数
您需要从PL/SQL块调用此函数。这样的函数是可疑的；如果它返回一个值就可以了，但是-将它与几个OUT
参数一起返回非常像一个过程，您应该使用它。下面是一个如何做到这一点的示例：
SQL> create or replace procedure p_test
2 (par_deptno in number,
3 par_count out number,
4 par_name out varchar2,
5 par_rc out sys_refcursor
6 )
7 is
8 begin
9 select count(*), max(dname)
10 into par_count, par_name
11 from dept
12 where deptno = par_deptno;
13
14 open par_rc for select * from dept;
15 end;
16 /
Procedure created.
测试：
SQL> set serveroutput on
SQL> declare
2 l_deptno dept.deptno%type := 10;
3 l_count number;
4 l_name dept.dname%type;
5 --
6 l_rc sys_refcursor;
7 r_deptno dept.deptno%type;
8 r_dname dept.dname%type;
9 r_loc dept.loc%type;
10 begin
11 p_test (l_deptno, l_count, l_name, l_rc);
12
13 dbms_output.put_line('count = ' || l_count);
14 dbms_output.put_line('name = ' || l_name);
15
16 loop
17 fetch l_rc into r_deptno, r_dname, r_loc;
18 exit when l_rc%notfound;
19 dbms_output.put_line(r_deptno ||' - '|| r_dname ||' - '|| r_loc);
20 end loop;
21 end;
22 /
count = 1
name = ACCOUNTING
10 - ACCOUNTING - NEW YORK
20 - RESEARCH - DALLAS
30 - SALES - CHICAGO
40 - OPERATIONS - BOSTON
PL/SQL procedure successfully completed.
SQL>
SQL> set serveroutput on
SQL> declare
2 l_deptno dept.deptno%type := 10;
3 l_count number;
4 l_name dept.dname%type;
5 --
6 l_rc sys_refcursor;
7 r_deptno dept.deptno%type;
8 r_dname dept.dname%type;
9 r_loc dept.loc%type;
10 begin
11 l_rc := f_test (l_deptno, l_count, l_name);
12
13 dbms_output.put_line('count = ' || l_count);
14 dbms_output.put_line('name = ' || l_name);
15
16 loop
17 fetch l_rc into r_deptno, r_dname, r_loc;
18 exit when l_rc%notfound;
19 dbms_output.put_line(r_deptno ||' - '|| r_dname ||' - '|| r_loc);
20 end loop;
21 end;
22 /
count = 1
name = ACCOUNTING
10 - ACCOUNTING - NEW YORK
20 - RESEARCH - DALLAS
30 - SALES - CHICAGO
40 - OPERATIONS - BOSTON
PL/SQL procedure successfully completed.
SQL>
如果你坚持一个函数，哦，好吧，给你；如您所见，它与前面的示例非常相似：
SQL> create or replace function f_test
2 (par_deptno in number,
3 par_count out number,
4 par_name out varchar2
5 )
6 return sys_refcursor
7 is
8 l_rc sys_refcursor;
9 begin
10 select count(*), max(dname)
11 into par_count, par_name
12 from dept
13 where deptno = par_deptno;
14
15 open l_rc for select * from dept;
16 return l_rc;
17 end;
18 /
Function created.
测试：
SQL> set serveroutput on
SQL> declare
2 l_deptno dept.deptno%type := 10;
3 l_count number;
4 l_name dept.dname%type;
5 --
6 l_rc sys_refcursor;
7 r_deptno dept.deptno%type;
8 r_dname dept.dname%type;
9 r_loc dept.loc%type;
10 begin
11 p_test (l_deptno, l_count, l_name, l_rc);
12
13 dbms_output.put_line('count = ' || l_count);
14 dbms_output.put_line('name = ' || l_name);
15
16 loop
17 fetch l_rc into r_deptno, r_dname, r_loc;
18 exit when l_rc%notfound;
19 dbms_output.put_line(r_deptno ||' - '|| r_dname ||' - '|| r_loc);
20 end loop;
21 end;
22 /
count = 1
name = ACCOUNTING
10 - ACCOUNTING - NEW YORK
20 - RESEARCH - DALLAS
30 - SALES - CHICAGO
40 - OPERATIONS - BOSTON
PL/SQL procedure successfully completed.
SQL>
SQL> set serveroutput on
SQL> declare
2 l_deptno dept.deptno%type := 10;
3 l_count number;
4 l_name dept.dname%type;
5 --
6 l_rc sys_refcursor;
7 r_deptno dept.deptno%type;
8 r_dname dept.dname%type;
9 r_loc dept.loc%type;
10 begin
11 l_rc := f_test (l_deptno, l_count, l_name);
12
13 dbms_output.put_line('count = ' || l_count);
14 dbms_output.put_line('name = ' || l_name);
15
16 loop
17 fetch l_rc into r_deptno, r_dname, r_loc;
18 exit when l_rc%notfound;
19 dbms_output.put_line(r_deptno ||' - '|| r_dname ||' - '|| r_loc);
20 end loop;
21 end;
22 /
count = 1
name = ACCOUNTING
10 - ACCOUNTING - NEW YORK
20 - RESEARCH - DALLAS
30 - SALES - CHICAGO
40 - OPERATIONS - BOSTON
PL/SQL procedure successfully completed.
SQL>