在Oracle 11g中，将REFCURSOR变量打印为过程中的OUT参数时出错

我正在使用Oracle（Oracle 11.1.0.7.0）。我在包MyPackage中创建了一个示例存储过程。我作为用户“DBA_用户”登录以创建此SP

PROCEDURE WT_MANAGEMENT_PRODUCTIVITY 
(
cur_output Out T_CURSOR
)AS 

sqlstr VARCHAR2(5000);
 BEGIN
  Sqlstr:='select sysdate from dual';
  Open cur_output For Sqlstr;

 END WT_MANAGEMENT_PRODUCTIVITY;

我尝试使用调用此SP

var r ref cursor;
exec MyPackage.WT_MANAGEMENT_PRODUCTIVITY(:r);
print r;

但它在Oracle SQL Developer中引发了以下错误

Usage: VAR[IABLE] [ <variable> [ NUMBER | CHAR | CHAR (n [CHAR|BYTE]) |
VARCHAR2 (n [CHAR|BYTE]) | NCHAR | NCHAR (n) |
NVARCHAR2 (n) | CLOB | NCLOB | REFCURSOR |
BINARY_FLOAT | BINARY_DOUBLE ] ]


Error starting at line 2 in command:
exec MyPackage.WT_MANAGEMENT_PRODUCTIVITY(:r);
Error report:
ORA-06550: line 1, column 7:
PLS-00306: wrong number or types of arguments in call to 'WT_MANAGEMENT_PRODUCTIVITY'
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored
06550. 00000 -  "line %s, column %s:\n%s"
*Cause:    Usually a PL/SQL compilation error.
*Action:
r
------

参考光标

上述内容在语法上是不正确的。应该是-

var r refcursor

ref cursor之间没有空格，它是一个单词，

refcursor

比如说,

SQL> create table t as select * from emp;

Table created.

SQL> var r refcursor
SQL>
SQL> begin
  2     open :r for select * from t;
  3  end;
  4  /

PL/SQL procedure successfully completed.

SQL>
SQL> delete from t;

14 rows deleted.

SQL> commit;

Commit complete.

SQL>
SQL> print r

     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM
---------- ---------- --------- ---------- --------- ---------- ----------
     DEPTNO
----------
      7369 SMITH      CLERK           7902 17-DEC-80        800
        20

      7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300
        30

      7521 WARD       SALESMAN        7698 22-FEB-81       1250        500
        30


      7566 JONES      MANAGER         7839 02-APR-81       2975
        20

      7654 MARTIN     SALESMAN        7698 28-SEP-81       1250       1400
        30

      7698 BLAKE      MANAGER         7839 01-MAY-81       2850
        30

      7782 CLARK      MANAGER         7839 09-JUN-81       2450
        10

      7788 SCOTT      ANALYST         7566 09-DEC-82       3000
        20

      7839 KING       PRESIDENT            17-NOV-81       5000
        10

      7844 TURNER     SALESMAN        7698 08-SEP-81       1500
        30

      7876 ADAMS      CLERK           7788 12-JAN-83       1100
        20

      7900 JAMES      CLERK           7698 03-DEC-81        950
        30


      7902 FORD       ANALYST         7566 03-DEC-81       3000
        20

      7934 MILLER     CLERK           7782 23-JAN-82       1300
        10


14 rows selected.

SQL>

---

类型T_CURSOR是REF CURSOR；很抱歉没有早点提到。我已经编辑了我的问题以包含相同的内容。

var r ref cursor

错误。将其更改为

var r refcursor

。看看我的答案。

SQL> create table t as select * from emp;

Table created.

SQL> var r refcursor
SQL>
SQL> begin
  2     open :r for select * from t;
  3  end;
  4  /

PL/SQL procedure successfully completed.

SQL>
SQL> delete from t;

14 rows deleted.

SQL> commit;

Commit complete.

SQL>
SQL> print r

     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM
---------- ---------- --------- ---------- --------- ---------- ----------
     DEPTNO
----------
      7369 SMITH      CLERK           7902 17-DEC-80        800
        20

      7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300
        30

      7521 WARD       SALESMAN        7698 22-FEB-81       1250        500
        30


      7566 JONES      MANAGER         7839 02-APR-81       2975
        20

      7654 MARTIN     SALESMAN        7698 28-SEP-81       1250       1400
        30

      7698 BLAKE      MANAGER         7839 01-MAY-81       2850
        30

      7782 CLARK      MANAGER         7839 09-JUN-81       2450
        10

      7788 SCOTT      ANALYST         7566 09-DEC-82       3000
        20

      7839 KING       PRESIDENT            17-NOV-81       5000
        10

      7844 TURNER     SALESMAN        7698 08-SEP-81       1500
        30

      7876 ADAMS      CLERK           7788 12-JAN-83       1100
        20

      7900 JAMES      CLERK           7698 03-DEC-81        950
        30


      7902 FORD       ANALYST         7566 03-DEC-81       3000
        20

      7934 MILLER     CLERK           7782 23-JAN-82       1300
        10


14 rows selected.

SQL>