PL/SQL打印出存储过程返回的引用游标

Question

如何从存储过程(OUT变量)返回的引用游标中获取并将结果行打印到SQL*PLUS中的STDOUT？

ORACLE存储过程:

PROCEDURE GetGrantListByPI(p_firstname IN VARCHAR2, p_lastname IN VARCHAR2,
p_orderby IN VARCHAR2, p_cursor OUT grantcur);

PL/SQL:

SET SERVEROUTPUT ON;

DECLARE
  TYPE r_cursor IS REF CURSOR;
  refCursor r_cursor;

  CURSOR grantCursor IS
    SELECT last_name, first_name
    FROM ten_year_pis
    WHERE year_added = 2010;

  last_name VARCHAR2(100);
  first_name VARCHAR2(100);

BEGIN
  OPEN grantCursor;
  FETCH grantCursor INTO last_name, first_name;

  WHILE grantCursor%FOUND LOOP
    PMAWEB_PKG.GetGrantListByPI(last_name, first_name, 'last_name', refCursor);

    --HOW DO I LOOP THROUGH THE RETURNED REF CURSOR (refCursor)
    --AND PRINT THE RESULTING ROWS TO STDOUT?

    FETCH grantCursor into last_name, first_name;
  END LOOP;
  CLOSE grantCursor;
END;
/

Answer 1

注意:此代码未经测试

为refCursor返回类型定义一条记录,将其命名为rec.例如:

TYPE MyRec IS RECORD (col1 VARCHAR2(10), col2 VARCHAR2(20), ...);  --define the record
rec MyRec;        -- instantiate the record

从过程返回refcursor后,可以在以下注释中添加以下代码:

LOOP
  FETCH refCursor INTO rec;
  EXIT WHEN refCursor%NOTFOUND;
  dbms_output.put_line(rec.col1||','||rec.col2||','||...);
END LOOP;

Answer 2

您可以在SQLPlus级别使用绑定变量来执行此操作.当然,您几乎无法控制输出的格式.

VAR x REFCURSOR;
EXEC GetGrantListByPI(args, :x);
PRINT :x;

Answer 3

更简单的选择是使用DBMS_SQL.return_result()；

假设您的包/过程/光标规格如下。

    create or replace PACKAGE my_package IS
    
    TYPE my_ref_cursor_type IS REF CURSOR;
    
    PROCEDURE my_procedure (
        p_in_param1     IN     VARCHAR2, 
        p_in_param2     IN     VARCHAR2, 
        p_in_param3     IN     VARCHAR2, 
        p_my_ref_cursor OUT    my_ref_cursor_type,
        p_err_code      OUT    NUMBER,
        p_err_msg       OUT    VARCHAR2   
        );
    
    END my_package;

尝试从您的 sql 开发人员工作表中调用该过程

SET SERVEROUTPUT ON;

DECLARE

  P_MY_REF_CURSOR my_schema.my_package.my_ref_cursor_type;
  P_ERR_CODE NUMBER;
  P_ERR_MSG VARCHAR2(200);
  
BEGIN

  my_package.my_procedure(
    'VALUE1',
    'VALUE2',
    'VALUE3',
    P_MY_REF_CURSOR => P_MY_REF_CURSOR,
    P_ERR_CODE => P_ERR_CODE,
    P_ERR_MSG => P_ERR_MSG
  );
    DBMS_OUTPUT.PUT_LINE(P_ERR_MSG); 
    DBMS_OUTPUT.PUT_LINE(P_ERR_CODE); 
    DBMS_SQL.return_result(P_MY_REF_CURSOR);

END;

希望这可以帮助 ！

Answer 4

如果要打印select子句中的所有列,可以使用autoprint命令.

CREATE OR REPLACE PROCEDURE sps_detail_dtest(v_refcur OUT sys_refcursor)
AS
BEGIN
  OPEN v_refcur FOR 'select * from dummy_table';
END;

SET autoprint on;

--calling the procedure
VAR vcur refcursor;
DECLARE 
BEGIN
  sps_detail_dtest(vrefcur=>:vcur);
END;

希望这能为您提供另一种解决方案