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Oracle

Home >Oracle > Checking privileges on oracle objects

Stampa  Stampa


Recently some colleagues did get sort of lost looking for their privileges on some other schema procedures and directories.
So as requested, it follows some brief suggestions on checking user privileges on different oracle objects. Many users know that to check if a schema has privileges on another schema's table simply need to check the dictionary view user_tab_privs.
For example, if USER_A creates a table and allows USER_B to query and update it:

SQLPLUS> create table t(n number); SQLPLUS> grant select, insert on t to USEER_B;

Then schema USER_B can check his privileges on USER_A objects querying the view user_tab_privs:

SQLPLUS> select * from user_tab_privs where owner='USER_A';

GRANTEE OWNER TABLE_NAME GRANTOR PRIVILEGE GRANTABLE HIERARCHY
USER_B USER_A T USER_A SELECT NO NO
USER_B USER_A T USER_A UPDATE NO NO

But what about privileges on other objects such as procedures or directories. Following oracle naming logic, We would look for user_procedures_privs , user_directories_privs or something like that, and get just "object not found". As a matter of fact, until now (Oracle 10g), user_tab_privs, dba_tab_privs, all_tab_privs are the dictionary objects to check schemas privileges.
If, for example USER_A creates a procedure and a oracle directory and allows USER_B to executing on the first, and reading, writing on the other.

SQLPLUS>create or replace procedure pro_joke as begin dbms_output.put_line('Just a joke'); end; /

SQLPLUS> grant execute on pro_joke to USER_B;

SQLPLUS> create or replace directory tmp_dir as '/tmp';

SQLPLUS> grant read, write on directory tmp_dir to USER_B;


Now USER_B wants to check his privileges on USER_A new objects. (By the way, note carefully, the query where condition is set on grantor not on owner as before, because the owner of an Oracle directory is by default SYS).

SQLPLUS> select * from user_tab_privs where grantor='USER_A';

GRANTEE OWNER TABLE_NAME GRANTOR PRIVILEGE GRANTABLE HIERARCHY
USER_B USER_A T USER_A SELECT NO NO
USER_B USER_A T USER_A INSERT NO NO
USER_B USER_A PRO_JOKE USER_A EXECUTE NO NO
USER_B SYS TMP_DIR USER_A WRITE NO NO
USER_B SYS TMP_DIR USER_A READ NO NO


So [dba/all/user/]_tab_privs is the source of not only tables but objects privileges. Next question is if privileges on tables, views, procedures, functions, directories merge all in the same view tab_privs, how to know which kind of objects we have ?
Answer is easy, joining to all_objects views:


SQLPLUS>col owner format a12;
SQLPLUS>col object format a12;
SQLPLUS>col object_type format a16;
SQLPLUS>col privilege format a16;

SQLPLUS> select p.table_name object, o.object_type, p.privilege , p.owner from user_tab_privs p, all_objects o where p.table_name = o.object_name order by 1;

OBJECT OBJECT_TYPE PRIVILEGE OWNER
PRO_JOKE PROCEDURE EXECUTE USER_A
T TABLE SELECT USER_A
T TABLE INSERT USER_A
TMP_DIR DIRECTORY WRITE SYS
TMP_DIR DIRECTORY READ SYS




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signal Marco Magnani marcomagnani@fishscript.com



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Oracle... Info: dbms_output.put_line

A good scientist is a person with original ideas.
A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering.
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A good scientist is a person with original ideas.
A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering.
Freeman Dyson

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