Question

how to access v$database from PL/SQL (11g)

Asked by: jl66

sqlplus login as User system:
want to access v$database to get the database name out by
    EXECUTE IMMEDIATE 'select name into v_DBname from v$database';    
I got the error:
ORA-00942: table or view does not exist
ORA-06512: at "SYSTEM.CHANGE_PASSWORD", line 27

How to deal with it?

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Asked On
2009-09-21 at 15:16:28ID24750042
Tags

Oracle pl/sql

,

oracle 10g/11g

Topics

PL / SQL

,

Oracle 10.x

,

Oracle 11.x Database

Participating Experts
2
Points
500
Comments
4

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Answers

 

by: mrjoltcolaPosted on 2009-09-21 at 16:09:54ID: 25388511

v$database is a synonym and its base view is sys.v_$database

Since SYSTEM has access to that view via the DBA role, in order to use it in a procedure, you'll need to grant explicit object privileges on that object to system as the ROLE will not be in effect.

connect / as sysdba
grant select on v_$database to system;

-- Then create procedure as SYSTEM

CREATE OR REPLACE FUNCTION getdbname RETURN VARCHAR2
AS
v_DBname varchar2(100);
BEGIN
select name into v_DBname from sys.v_$database;
return v_DBname;
END;
/

 

by: AndytwPosted on 2009-09-21 at 16:13:21ID: 25388535

The user has access to V$DATABASE via a role.  You need to grant privileges on this object (V$DATABASE is a synonym for SYS.V_$DATABASE) directly to the user, then your code will compile.  This is due to the fact that Roles are not enabled in DEFINER RIGHTS procedures.

GRANT SELECT ON sys.v$_database TO user;

SQL> ed
Wrote file afiedt.buf
 
  1  create or replace procedure proc as
  2    v_dbname v$database.name%TYPE;
  3  begin
  4    execute immediate 'select name from v$database' into v_dbname;
  5* end;
SQL> /
 
Warning: Procedure created with compilation errors.
 
SQL> show errors;
Errors for PROCEDURE PROC:
 
LINE/COL ERROR
-------- -----------------------------------------------------------------
2/12     PL/SQL: Item ignored
2/12     PLS-00201: identifier 'V$DATABASE' must be declared
4/3      PL/SQL: Statement ignored
4/56     PLS-00320: the declaration of the type of this expression is
         incomplete or malformed
 
SQL> conn sys/***** as sysdba
Connected.
SQL> grant select on v_$database to andy;
 
Grant succeeded.
 
SQL> connect andy/*****
Connected.
SQL>  create or replace procedure proc as
  2     v_dbname v$database.name%TYPE;
  3   begin
  4     execute immediate 'select name from v$database' into v_dbname;
  5   end;
  6  /
 
Procedure created.
 
SQL>

                                              
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by: jl66Posted on 2009-09-21 at 17:26:59ID: 25388874

Thanks a lot for the info. How did you get the base table from the view?

 

by: mrjoltcolaPosted on 2009-09-21 at 17:38:12ID: 25388914

V$DATABASE is actually a synonym. The base view is V_$DATABASE

select * from dba_objects where object_name = 'V$DATABASE';

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