Oracle SQL FGA sys_context('userenv','current_sql') 被截断

Posted 2023-03-26

【中文标题】Oracle SQL FGA sys_context(\'userenv\',\'current_sql\') 被截断

【英文标题】：Oracle SQL FGA sys_context(‘userenv’,’current_sql’) truncatedOracle SQL FGA sys_context('userenv','current_sql') 被截断

【发布时间】：2017-09-23 01:53:50

【问题描述】：

我想记录针对特定表的所有语句，使用 FGA 和 sys_context('userenv','current_sql') 我接近我需要的，但似乎 current_sql 总是被截断为 256 个字符。

我尝试查看 current_sql1 到 7，但它们始终为空。这是我用来设置的代码：

create table emp_audit
( whodidit varchar2(40)
, whenwasit timestamp
, sql_executed varchar2(4000)
, sql_executed1 varchar2(4000)
, sql_executed2 varchar2(4000)
, sql_executed3 varchar2(4000)
, sql_executed4 varchar2(4000)
, sql_executed5 varchar2(4000)
, sql_executed6 varchar2(4000)
, sql_executed7 varchar2(4000)
);

create or replace
package AUDIT_HANDLER
is
PROCEDURE HANDLE_EMP_SAL_ACCESS
( object_schema VARCHAR2
, object_name VARCHAR2
, policy_name VARCHAR2
);
end;

create or replace
package body AUDIT_HANDLER
is
PROCEDURE HANDLE_EMP_SAL_ACCESS
( object_schema VARCHAR2
, object_name VARCHAR2
, policy_name VARCHAR2
) is
  PRAGMA AUTONOMOUS_TRANSACTION;
begin
  insert into emp_audit
  ( whodidit, whenwasit, sql_executed, SQL_EXECUTED1, SQL_EXECUTED2, SQL_EXECUTED3, SQL_EXECUTED4, SQL_EXECUTED5, SQL_EXECUTED6, SQL_EXECUTED7)
  values
  ( user, systimestamp, sys_context('userenv','current_sql'),sys_context('userenv','current_sql1'),sys_context('userenv','current_sql2'),sys_context('userenv','current_sql3'),sys_context('userenv','current_sql4'),sys_context('userenv','current_sql5'),sys_context('userenv','current_sql6'),sys_context('userenv','current_sql7'))
  ;
  commit;
end HANDLE_EMP_SAL_ACCESS;
end;


begin
  dbms_fga.add_policy
  ( object_schema=>'EPAT'
  , object_name=>'PERSON'
  , policy_name=>'PHI_ACCESS_HANDLED'
  , handler_schema => 'SBOUCHAR'
  , handler_module => 'AUDIT_HANDLER.HANDLE_EMP_SAL_ACCESS'
  );
end;

【参考方案1】：

看来您必须在调用 sys_context 时指定长度：

sys_context('userenv','current_sql',4000)