Gaius cung cấp cho bạn câu trả lời ngắn. Nhận xét của ông về việc gói nó vào một giao dịch tự trị là rất quan trọng. Bạn sẽ hối hận ngày giao dịch của bạn được khôi phục và bạn không biết tại sao.
Dưới đây là nội dung hiển thị bằng cách sử dụng giao dịch tự động với một vài chi tiết bổ sung được đưa vào để bạn biết toàn bộ về lỗi xảy ra ở đâu.
khối ngoại lệ của bạn trở thành một cái gì đó như thế này: -
exception
when exception_pkg.assertion_failure_exception then
rollback;
raise;
when others then
rollback;
v_code := SQLCODE;
v_errm := SUBSTR(SQLERRM, 1, 255);
exception_pkg.throw(exception_pkg.unhandled_except, v_code || ' - ' || v_errm || ' ($Header$)');
... aaaand, đây là tất cả các mã bạn cần hỗ trợ này. Chơi đùa với nó, nó :-) hữu ích
-- Create a table to hold the error messages
CREATE TABLE ERROR_MESSAGES
(
ERROR_MESSAGE_ID NUMBER(10) NOT NULL,
ERROR_DATE TIMESTAMP(6) DEFAULT SYSDATE NOT NULL,
ERROR_USER VARCHAR2(30 BYTE) DEFAULT USER NOT NULL,
MESSAGE_TYPE VARCHAR2(15 BYTE),
PACKAGE_NAME VARCHAR2(250 BYTE),
PROCEDURE_OR_LINE VARCHAR2(30 BYTE),
ERROR_CODE VARCHAR2(10 BYTE),
ERROR_MESSAGE1 VARCHAR2(4000 BYTE),
ERROR_MESSAGE2 VARCHAR2(4000 BYTE),
ERROR_MESSAGE3 VARCHAR2(4000 BYTE),
ERROR_MESSAGE4 VARCHAR2(4000 BYTE)
);
CREATE UNIQUE INDEX ERROR_MESSAGES_XPK ON ERROR_MESSAGES
(ERROR_MESSAGE_ID);
-- Create the sequence used for the ERROR_MESSAGES PK
CREATE SEQUENCE ERROR_MESSAGE_SEQ
START WITH 1;
-- The package
CREATE OR REPLACE PACKAGE EXCEPTION_PKG
as
/************************************************************************************
* $Header$
*
* Package: exception_pkg
*
* Purpose: Exception handling functionality
*
* Authors: M.McAllister (via AskTom - http://tinyurl.com/c43jt)
*
* Revision History:
*
* $Log[10]$
******************************************************************************************/
/*=====================================================================
* Constants
*=====================================================================*/
c_InfMsg constant error_messages.message_type%type := 'Informational';
c_WarnMsg constant error_messages.message_type%type := 'Warning';
c_ErrMsg constant error_messages.message_type%type := 'Fatal Error';
c_DbgMsg constant error_messages.message_type%type := 'Debug';
c_MaintMsg constant error_messages.message_type%type := 'Maintenance';
/*=====================================================================
* Exception Definitions
*=====================================================================*/
unhandled_except constant number := -20001;
unhandled_except_exception exception;
pragma exception_init(unhandled_except_exception, -20001);
bad_parameter constant number := -20002;
bad_parameter_exception exception;
pragma exception_init(bad_parameter_exception, -20002);
assertion_failure constant number := -20003;
assertion_failure_exception exception;
pragma exception_init(assertion_failure_exception, -20003);
/*=====================================================================
* Procedures
*=====================================================================*/
procedure write_exception_info(p_msg_type error_messages.message_type%type
, p_pkg_name error_messages.package_name%type
, p_func_name error_messages.procedure_or_line%type
, p_error_code error_messages.error_code%type
, p_msg1 error_messages.error_message2%type
, p_msg2 error_messages.error_message3%type
, p_msg3 error_messages.error_message4%type
);
procedure who_called_me(p_owner out varchar2,
p_name out varchar2,
p_lineno out number,
p_caller_t out varchar2,
p_my_depth in number default 3
);
procedure throw(p_exception in number
, p_extra_msg in varchar2 default NULL
);
end exception_pkg;
/
-- Package Body
CREATE OR REPLACE PACKAGE BODY EXCEPTION_PKG
as
/************************************************************************************
* $Header$
*
* Package: exception_pkg
*
* Purpose: Exception handling functionality
*
* Authors: M.McAllister (via AskTom - http://tinyurl.com/c43jt)
*
* Revision History:
*
* $Log[10]$
******************************************************************************************/
/*=====================================================================
* Types
*=====================================================================*/
type myArray is table of varchar2(255) index by binary_integer;
/*=====================================================================
* Globals
*=====================================================================*/
err_msgs myArray;
/*=====================================================================
* Procedures
*=====================================================================*/
procedure who_called_me(p_owner out varchar2,
p_name out varchar2,
p_lineno out number,
p_caller_t out varchar2,
p_my_depth in number default 3
)
as
call_stack varchar2(4096) default dbms_utility.format_call_stack;
n number;
found_stack BOOLEAN default FALSE;
line varchar2(255);
cnt number := 0;
begin
loop
n := instr(call_stack, chr(10));
exit when (cnt = p_my_depth or n is NULL or n = 0);
line := substr(call_stack, 1, n-1);
call_stack := substr(call_stack, n+1);
if (NOT found_stack) then
if (line like '%handle%number%name%') then
found_stack := TRUE;
end if;
else
cnt := cnt + 1;
-- cnt = 1 is ME
-- cnt = 2 is MY Caller
-- cnt = 3 is Their Caller
if (cnt = p_my_depth) then
p_lineno := to_number(substr(line, 13, 6));
line := substr(line, 21);
if (line like 'pr%') then
n := length('procedure ');
elsif (line like 'fun%') then
n := length('function ');
elsif (line like 'package body%') then
n := length('package body ');
elsif (line like 'pack%') then
n := length('package ');
elsif (line like 'anonymous%') then
n := length('anonymous block ');
else
n := null;
end if;
if (n is not null) then
p_caller_t := ltrim(rtrim(upper(substr(line, 1, n-1))));
else
p_caller_t := 'TRIGGER';
end if;
line := substr(line, nvl(n,1));
n := instr(line, '.');
p_owner := ltrim(rtrim(substr(line, 1, n-1)));
p_name := ltrim(rtrim(substr(line, n+1)));
end if;
end if;
end loop;
end who_called_me;
/*=====================================================================
* PRIVATE function: get_session_info
* purpose: Returns a formatted string containing some information
* about the current session
*=====================================================================*/
function get_session_info return varchar2 is
l_sessinfo varchar2(2000);
begin
select
'[SID = ' || sid || '], ' ||
'[SERIAL# = ' || serial# ||'], ' ||
'[MACHINE = ' || replace(machine,chr(0),'') || '], ' ||
'[OSUSER = ' || osuser || '], ' ||
'[PROGRAM = ' || program || '], ' ||
'[LOGON_TIME = ' || to_char(logon_time,'mm/dd/yyyy hh:mi:ss') || ']' into l_sessinfo
from v$session
WHERE audsid = SYS_CONTEXT('userenv','sessionid');
return l_sessinfo;
end get_session_info;
/*=====================================================================
* procedure: write_exception_info
* purpose: Call the exception logging routine
*=====================================================================*/
procedure write_exception_info(p_msg_type error_messages.message_type%type
, p_pkg_name error_messages.package_name%type
, p_func_name error_messages.procedure_or_line%type
, p_error_code error_messages.error_code%type
, p_msg1 error_messages.error_message2%type
, p_msg2 error_messages.error_message3%type
, p_msg3 error_messages.error_message4%type
) is
-- This procedure is autonomous from the calling procedure.
-- i.e The calling procedure does not have to be complete
-- for this procedure to commit its changes.
pragma autonomous_transaction;
l_sessinfo varchar2(2000);
begin
l_sessinfo := get_session_info;
insert into error_messages
(error_message_id
, error_date
, error_user
, message_type
, package_name
, procedure_or_line
, error_code
, error_message1
, error_message2
, error_message3
, error_message4
)
values
(error_message_seq.nextval
, sysdate
, USER
, p_msg_type
, p_pkg_name
, p_func_name
, p_error_code
, l_sessinfo
, p_msg1
, p_msg2
, p_msg3
);
commit;
exception
when others then
-- We don't want an error logging a message to
-- cause the application to crash
return;
end write_exception_info;
procedure throw(p_exception in number
, p_extra_msg in varchar2 default NULL
) is
l_owner varchar2(30);
l_name varchar2(30);
l_type varchar2(30);
l_line number;
l_exception number;
begin
who_called_me(l_owner, l_name, l_line, l_type);
write_exception_info(c_ErrMsg
, l_owner || '.' || l_name
, 'Line ' || l_line
, p_exception
, p_extra_msg
, NULL
, err_msgs(p_exception)
);
raise_application_error(p_exception
, 'Exception at ' || l_type || ' ' ||
l_owner || '.' || l_name || '(' || l_line || '). ' ||
err_msgs(p_exception ) || '. ' || p_extra_msg
, TRUE);
exception
-- we will get this when we have an invalid exception code, one
-- that was not set in the err_msgs array below. The plsql table
-- access will raise the NO-DATA-FOUND exception. We'll catch it,
-- verify the exception code is in the valid range for raise_application_error
-- (if not, set to -20000) and then raise the exception with the message
-- "unknown error"
when NO_DATA_FOUND then
if (p_exception between -20000 and -20999) then
l_exception := p_exception;
else
l_exception := -20000;
end if;
write_exception_info(c_ErrMsg
, l_owner || '.' || l_name
, 'Line ' || l_line
, p_exception
, p_extra_msg
, NULL
, '**UNKNOWN ERROR**'
);
raise_application_error(l_exception
, 'Exception at ' || l_type || ' ' ||
l_owner || '.' || l_name || '(' || l_line || '). ' ||
'**UNKNOWN ERROR**' || '. ' || p_extra_msg
, TRUE);
end throw;
begin
-- This code is run once per session when this package is first touched
err_msgs(unhandled_except) := 'Unhandled exception';
err_msgs(bad_parameter) := 'Invalid parameter passed into function or procedure';
err_msgs(assertion_failure) := 'Program execution stopped due to assertion failure';
end exception_pkg;
/
Cảm ơn! Có nó hoạt động .. –