Oracle 存储过程 OUT 参数

Posted 2023-03-28

【中文标题】Oracle 存储过程 OUT 参数

【英文标题】：Oracle stored procedure OUT parameters

【发布时间】：2009-05-21 10:11:44

【问题描述】：

我有一个带有 IN OUT 参数的存储过程，声明如下：

create or replace PROCEDURE RIFATT_SEGN0_INS(pIdRifattSegn0  in  OUT NUMBER,
                           pNumDossier IN VARCHAR2 ,
                           pNumConsegna IN NUMBER,
                           pDtConsegna IN DATE,
[..]

)  AS
[..]

每当我从另一个过程中调用它时，我如何获取也输出的 pIdRifattSegn0 参数？

【参考方案1】：

您的问题并不完全清楚。顾名思义，IN OUT 参数是双向传递的。这意味着它必须传递一个变量，而不是文字，并且您需要一个声明块来执行此操作。例如：

declare
  l_segn number;
begin
  l_segn := 1;
  -- procedure will have received value = 1
  rifatt_segn0_ins(l_segn, 'x', 2, sysdate);
  -- procedure may have changed value of l_segn from 1 to something else
  dbms_output.put_line(l_segn); 
end;

【参考方案2】：

这是一个例子：

SQL> create or replace PROCEDURE RIFATT_SEGN0_INS
  2  ( pIdRifattSegn0 IN OUT NUMBER
  3  , pNumDossier    IN     VARCHAR2
  4  , pNumConsegna   IN     NUMBER
  5  , pDtConsegna    IN     DATE
  6  )
  7  as
  8  begin
  9    dbms_output.put_line(pNumDossier);
 10    dbms_output.put_line(to_char(pNumConsegna));
 11    dbms_output.put_line(to_char(pDtConsegna,'yyyy-mm-dd'));
 12    pIdRifattSegn0 := sqrt(pIdRifattSegn0);
 13  end;
 14  /

Procedure is aangemaakt.

SQL> create or replace procedure another_procedure
  2  as
  3    l_IdRifattSegn0 number := 4;
  4  begin
  5    rifatt_segn0_ins
  6    ( pIdRifattSegn0 => l_IdRifattSegn0
  7    , pNumDossier    => '1A'
  8    , pNumConsegna   => 42
  9    , pDtConsegna    => sysdate
 10    );
 11    dbms_output.put_line('from another_procedure: l_IdRifattSegn0 = ' || to_char(l_IdRifattSegn0));
 12  end;
 13  /

Procedure is aangemaakt.

SQL> exec another_procedure
1A
42
2009-05-21
from another_procedure: l_IdRifattSegn0 = 2

PL/SQL-procedure is geslaagd.

问候， 抢。