oracle - 如何使用 %ROWTYPE 获得真实签名

Question

如何获取使用 %ROWTYPE 参数的 PLSQL 过程的真实签名？

例如 :

clear screen;
prompt > Table creation to support %ROWTYPE
create table samples (
  id number,
  code varchar2(15),
  lib varchar2(200) );

prompt > Package witch use %ROWTYPE
create or replace package use_samples as
  procedure getSample(input_sample samples%ROWTYPE);
end use_samples;
/
prompt > Package BODY witch use %ROWTYPE
create or replace package body use_samples as
  procedure getSample(input_sample IN samples%ROWTYPE) is
    ex samples%ROWTYPE;
  begin
    select * into ex from samples where samples.code = input_sample.code;
  end getSample;
end use_samples;
/

prompt > Proc arguments by ALL_ARGUMENTS
set pagesize 50000
set linesize 2000
set verify off
CLEAR COLUMNS;
COLUMN object_name HEADING "PROC" FORMAT A30 JUSTIFY LEFT;
COLUMN argument_name HEADING "ARGUMENT_NAME" FORMAT A30 JUSTIFY LEFT;

select object_name, argument_name, in_out, data_level, position, data_type
from all_arguments
where owner = USER
and package_name = 'USE_SAMPLES'
and object_name = 'GETSAMPLE';

prompt >> Argument 'INPUT_SAMPLE' is shown as 'PL/SQL RECORD' without any link to 'samples%ROWTYPE'

prompt > PLSQL types declared
select *
from DBA_PLSQL_TYPES
where owner = USER
and package_name = 'USE_SAMPLES';

prompt >> There is no declared type because we use directly a %ROWTYPE argument


prompt > Clean up  
drop package use_samples;
drop table samples;

给出:

> Table creation to support %ROWTYPE

Table SAMPLES created.

> Package witch use %ROWTYPE

Package USE_SAMPLES compiled

> Package BODY witch use %ROWTYPE

Package body USE_SAMPLES compiled
> Proc arguments by ALL_ARGUMENTS
columns cleared

PROC                           ARGUMENT_NAME                  IN_OUT    DATA_LEVEL   POSITION DATA_TYPE                    
------------------------------ ------------------------------ --------- ---------- ---------- ------------------------------
GETSAMPLE                      INPUT_SAMPLE                   IN                 0          1 PL/SQL RECORD                 
GETSAMPLE                      ID                             IN                 1          1 NUMBER                        
GETSAMPLE                      CODE                           IN                 1          2 VARCHAR2                      
GETSAMPLE                      LIB                            IN                 1          3 VARCHAR2                      

>> Argument 'INPUT_SAMPLE' is shown as 'PL/SQL RECORD' without any link to 'samples%ROWTYPE'
> PLSQL types declared
no rows selected


>> There is no declared type because we use directly a %ROWTYPE argument
> Clean up

Package USE_SAMPLES dropped.


Table SAMPLES dropped.

因此，对于 ALL_ARGUMENTS，“INPUT_SAMPLE”显示为“PL/SQL RECORD”，而没有任何指向“samples%ROWTYPE”的链接。并且在 DBA_PLSQL_TYPES 中没有这种类型的踪迹。

如何在此表格下获得此过程的声明类型？

GETSAMPLE  INPUT_SAMPLE IN  SAMPLES%ROWTYPE

Answer 1

我可以建议走另一条路:

1)创建具有表中所需的所有属性的对象类型

2)创建您的类型的对象表

3) 将参数传递给你的 TYPE 过程

4) 您可以从 all_arguments 获取类型名称
%rowtype和 %type是在编译期间动态解析的伪类型。那么在这种情况下，您希望在 data_dictionary 信息中看到什么？没有与 sample%rowtype 相关的命名记录/类型/对象。