desc procedure可以看到procedure的宣告。
那如果要檢視procudre的內容呢？
solution：

select text from all_source where name = ‘ABC_GET_CMF' and OWNER='CWUK_YY' order by line;

PROCEDURE abc_get_cmf(
  v_account_no                          NUMBER,
  abc_get_cmf_cv IN OUT cv_types.customer_tp)
IS
BEGIN
  OPEN abc_get_cmf_cv FOR
  SELECT
  no_bill,
  CMF.currency_code,
  prev_bill_date
  FROM CMF
  WHERE CMF.account_no = v_account_no；  
END;

14 rows selected.

我們可以看下all_source這個表的各個欄位
SQL> desc  all_source;
 Name                                                                    Null?    Type
 ----------------------------------------------------------------------- -------- ------------------------------------------------
 OWNER                                                                            VARCHAR2(30)
 NAME                                                                             VARCHAR2(30)
 TYPE                                                                             VARCHAR2(12)
 LINE                                                                             NUMBER
 TEXT                                                                             VARCHAR2(4000)

SQL> select distinct type from all_source;

TYPE
------------
TYPE BODY
PROCEDURE
LIBRARY
TRIGGER
JAVA SOURCE
PACKAGE
TYPE
FUNCTION
PACKAGE BODY

ALL_SOURCE describes the text source of the stored objects accessible to the current user.
Related Views

DBA_SOURCE describes the text source of all stored objects in the database.

USER_SOURCE describes the text source of the stored objects owned by the current user. This view does not display the OWNERcolumn.
Column
Datatype
NULL
Description
OWNER
VARCHAR2(30)
NOT NULL
Owner of the object
NAME
VARCHAR2(30)
NOT NULL
Name of the object
TYPE
VARCHAR2(12)
 
Type of object: FUNCTION, JAVA SOURCE, PACKAGE, PACKAGE BODY, PROCEDURE, TRIGGER,TYPE, TYPE BODY
LINE
NUMBER
NOT NULL
Line number of this line of source
TEXT
VARCHAR2(4000)
Text source of the stored object
useful link：

https://docs.oracle.com/cd/B19306_01/server.102/b14237/statviews_2063.htm#i1588578