SQL> insert into t@sol11
  2  values(sys_context('userenv','sid'))
  3  /
values(sys_context('userenv','sid'))
       *
ERROR at line 2:
ORA-02070: database  does not support  in this context


SQL> create or replace
  2  function f1(
  3              p_namespace varchar2,
  4              p_parameter varchar2
  5             )
  6  return varchar2
  7  authid current_user
  8  is
  9  begin
 10  return sys_context(p_namespace,p_parameter);
 11  end;
 12  /

Function created.

SQL> insert into t@sol11
  2  values(f1('userenv','sid'))
  3  /

1 row created.

SQL> 

SQL> CREATE TABLE d(d NUMBER);

Table created.

SQL> CREATE OR REPLACE VIEW v_d AS SELECT * FROM d WHERE d>NVL (TO_NUMBER (SYS_CONTEXT ('userenv','s
id')), 0);

View created.

SQL> insert into t@sol11
  2  select * from v_d
  3  /
select * from v_d
                *
ERROR at line 2:
ORA-02070: database  does not support  in this context


SQL> CREATE OR REPLACE VIEW v_d AS SELECT * FROM d WHERE d>NVL (TO_NUMBER (F1('userenv','sid')), 0);


View created.

SQL> insert into t@sol11
  2  select * from v_d
  3  /

0 rows created.

SQL>