161 DBMS_STREAMS_AUTH

The DBMS_STREAMS_AUTH package, one of a set of Oracle Streams packages, provides subprograms for granting privileges to Oracle Streams administrators and revoking privileges from Oracle Streams administrators.

This chapter contains the following topics:

Using DBMS_STREAMS_AUTH

This section contains topics which relate to using the DBMS_STREAMS_AUTH package.

Overview

This package provides subprograms for granting privileges to Oracle Streams administrators and revoking privileges from Oracle Streams administrators.

See Also:

Oracle Streams Concepts and Administration and Oracle Streams Replication Administrator's Guide for more information about this package and Oracle Streams administrators

Security Model

Security on this package can be controlled in either of the following ways:

  • Granting EXECUTE on this package to selected users or roles.

  • Granting EXECUTE_CATALOG_ROLE to selected users or roles.

If subprograms in the package are run from within a stored procedure, then the user who runs the subprograms must be granted EXECUTE privilege on the package directly. It cannot be granted through a role.

To ensure that the user who runs the subprograms in this package has the necessary privileges, connect as an administrative user who can create users, grant privileges, and create tablespaces when using this package.

Summary of DBMS_STREAMS_AUTH Subprograms

Table 161-1 DBMS_STREAMS_AUTH Package Subprograms

Subprogram Description

GRANT_ADMIN_PRIVILEGE Procedure

Either grants the privileges needed by a user to be an Oracle Streams administrator directly, or generates a script that you can use to grant these privileges

GRANT_REMOTE_ADMIN_ACCESS Procedure

Enables a remote Oracle Streams administrator to perform administrative actions at the local database by connecting to the grantee using a database link

REVOKE_ADMIN_PRIVILEGE Procedure

Either revokes Oracle Streams administrator privileges from a user directly, or generates a script that you can use to revoke these privileges

REVOKE_REMOTE_ADMIN_ACCESS Procedure

Disables a remote Oracle Streams administrator from performing administrative actions by connecting to the grantee using a database link

Note:

All subprograms commit unless specified otherwise.

GRANT_ADMIN_PRIVILEGE Procedure

This procedure either grants the privileges needed by a user to be an Oracle Streams administrator directly, or generates a script that you can use to grant these privileges.

Syntax

DBMS_STREAMS_AUTH.GRANT_ADMIN_PRIVILEGE(
   grantee           IN  VARCHAR2,
   grant_privileges  IN  BOOLEAN   DEFAULT TRUE,
   file_name         IN  VARCHAR2  DEFAULT NULL,
   directory_name    IN  VARCHAR2  DEFAULT NULL);

Parameters

Table 161-2 GRANT_ADMIN_PRIVILEGE Procedure Parameters

Parameter Description

grantee

The user to whom privileges are granted

grant_privileges

If TRUE, then the procedure grants the privileges to the specified grantee directly, and adds the grantee to the DBA_STREAMS_ADMINISTRATOR data dictionary view with YES for both the LOCAL_PRIVILEGES column and the ACCESS_FROM_REMOTE column. If the user has an entry in this data dictionary view, then the procedure does not make another entry, and no error is raised. If TRUE and any of the grant statements fail, then the procedure raises an error.

If FALSE, then the procedure does not grant the privileges to the specified grantee directly, and does not add the grantee to the DBA_STREAMS_ADMINISTRATOR data dictionary view.

You specify FALSE when the procedure is generating a file that you will edit and then run. If you specify FALSE and either the file_name or directory_name parameter is NULL, then the procedure raises an error.

file_name

The name of the file generated by the procedure. The file contains all of the statements that grant the privileges. If a file with the specified file name exists in the specified directory name, then the grant statements are appended to the existing file.

If NULL, then the procedure does not generate a file.

directory_name

The directory into which the generated file is placed. The specified directory must be a directory object created using the SQL statement CREATE DIRECTORY. If you specify a directory, then the user who invokes the procedure must have WRITE privilege on the directory object.

If the file_name parameter is NULL, then this parameter is ignored, and the procedure does not generate a file.

If NULL and the file_name parameter is non-NULL, then the procedure raises an error.

Usage Notes

The user who runs the procedure must be an administrative user who can grant privileges to other users.

Specifically, the procedure grants the following privileges to the specified user:

  • The RESTRICTED SESSION system privilege

  • EXECUTE on the following packages:

    • DBMS_APPLY_ADM

    • DBMS_AQ

    • DBMS_AQADM

    • DBMS_AQIN

    • DBMS_AQELM

    • DBMS_CAPTURE_ADM

    • DBMS_FLASHBACK

    • DBMS_LOCK

    • DBMS_PROPAGATION_ADM

    • DBMS_RULE_ADM

    • DBMS_STREAMS_ADM

    • DBMS_STREAMS_ADVISOR_ADM

    • DBMS_STREAMS_HANDLER_ADM

    • DBMS_STREAMS_MESSAGING

    • DBMS_TRANSFORM

  • Privileges to enqueue messages into and dequeue messages from any queue

  • Privileges to manage any queue

  • Privileges to create, alter, and execute any of the following types of objects in the user's own schema and in other schemas:

    • Evaluation contexts

    • Rule sets

    • Rules

    In addition, the grantee can grant these privileges to other users.

  • SELECT_CATALOG_ROLE

  • SELECT or READ privilege on data dictionary views related to Oracle Streams

  • The ability to allow a remote Oracle Streams administrator to perform administrative actions through a database link by connecting to the grantee. This ability is enabled by running the GRANT_REMOTE_ADMIN_ACCESS procedure in this package.

    Note:

    • To view all of the statements run by the procedure in detail, you can use the procedure to generate a script and then view the script in a text editor.

    • This procedure does not grant any roles to the grantee.

    • This procedure grants only the privileges necessary to configure and administer an Oracle Streams environment. You can grant more privileges to the grantee if necessary.

    See Also:

GRANT_REMOTE_ADMIN_ACCESS Procedure

This procedure enables a remote Oracle Streams administrator to perform administrative actions at the local database by connecting to the grantee using a database link.

Syntax

DBMS_STREAMS_AUTH.GRANT_REMOTE_ADMIN_ACCESS(
   grantee  IN  VARCHAR2);

Parameters

Table 161-3 GRANT_REMOTE_ADMIN_ACCESS Procedure Parameter

Parameter Description

grantee

The user who allows remote access. The procedure adds the grantee to the DBA_STREAMS_ADMINISTRATOR data dictionary view with YES for the ACCESS_FROM_REMOTE column. If the user has an entry in this data dictionary view, then the procedure does not make another entry. Instead, it updates the ACCESS_FROM_REMOTE column to YES.

Usage Notes

Typically, you run the procedure and specify a grantee at a local source database if a downstream capture process captures changes originating at the local source database. The Oracle Streams administrator at a downstream capture database administers the source database using this connection. You can also run the procedure at a database running an apply process so that a remote Oracle Streams administrator can set instantiation SCNs at the local database.

Note:

The GRANT_ADMIN_PRIVILEGE procedure runs this procedure.

See Also:

GRANT_ADMIN_PRIVILEGE Procedure

REVOKE_ADMIN_PRIVILEGE Procedure

This procedure either revokes Oracle Streams administrator privileges from a user directly, or generates a script that you can use to revoke these privileges.

Syntax

DBMS_STREAMS_AUTH.REVOKE_ADMIN_PRIVILEGE(
   grantee            IN  VARCHAR2,  
   revoke_privileges  IN  BOOLEAN   DEFAULT TRUE,
   file_name          IN  VARCHAR2  DEFAULT NULL,
   directory_name     IN  VARCHAR2  DEFAULT NULL);

Parameters

Table 161-4 REVOKE_ADMIN_PRIVILEGE Procedure Parameters

Parameter Description

grantee

The user from whom privileges are revoked

revoke_privileges

If TRUE, then the procedure revokes the privileges from the specified user directly, and removes the user from the DBA_STREAMS_ADMINISTRATOR data dictionary view. If the user does not have a record in this data dictionary view, then the procedure does not remove a record from the view, and no error is raised. If TRUE and any of the revoke statements fail, then the procedure raises an error. A revoke statement will fail if the user is not granted the privilege that is being revoked.

If FALSE, then the procedure does not revoke the privileges to the specified user directly, and does not remove the user from the DBA_STREAMS_ADMINISTRATOR data dictionary view.

You specify FALSE when the procedure is generating a file that you will edit and then run. If you specify FALSE and either the file_name or directory_name parameter is NULL, then the procedure does not raise an error.

file_name

The name of the file generated by this procedure. The file contains all of the statements that revoke the privileges. If a file with the specified file name exists in the specified directory name, then the revoke statements are appended to the existing file.

If NULL, then the procedure does not generate a file.

directory_name

The directory into which the generated file is placed. The specified directory must be a directory object created using the SQL statement CREATE DIRECTORY. If you specify a directory, then the user who invokes the procedure must have WRITE privilege on the directory object.

If the file_name parameter is NULL, then this parameter is ignored, and the procedure does not generate a file.

If NULL and the file_name parameter is non-NULL, then the procedure raises an error.

Usage Notes

The user who runs this procedure must be an administrative user who can revoke privileges from other users. Specifically, this procedure revokes the privileges granted by running the GRANT_ADMIN_PRIVILEGE procedure in this package.

Note:

To view all of the statements run by this procedure in detail, you can use the procedure to generate a script and then view the script in a text editor.

See Also:

GRANT_ADMIN_PRIVILEGE Procedure

REVOKE_REMOTE_ADMIN_ACCESS Procedure

This procedure disables a remote Oracle Streams administrator from performing administrative actions by connecting to the grantee using a database link.

Note:

The REVOKE_ADMIN_PRIVILEGE procedure runs this procedure.

See Also:

REVOKE_ADMIN_PRIVILEGE Procedure

Syntax

DBMS_STREAMS_AUTH.REVOKE_REMOTE_ADMIN_ACCESS(
   grantee  IN  VARCHAR2);

Parameters

Table 161-5 REVOKE_REMOTE_ADMIN_ACCESS Procedure Parameter

Parameter Description

grantee

The user for whom access from a remote Oracle Streams administrator is disabled.

If a row for the grantee exists in the DBA_STREAMS_ADMINISTRATOR data dictionary view, then the procedure updates the ACCESS_FROM_REMOTE column for the grantee to NO. If, after this update, both the LOCAL_PRIVILEGES column and the ACCESS_FROM_REMOTE column are NO for the grantee, then the procedure removes the grantee from the view.

If no row for the grantee exists in the DBA_STREAMS_ADMINISTRATOR data dictionary view, then the procedure does not update the view and does not raise an error.