168 DBMS_XDBZ

The DBMS_XDBZ package controls the Oracle XML DB repository security, which is based on Access Control Lists (ACLs).

This chapter contains the following topics:

Using DBMS_XDBZ
- Security Model
- Constants
Summary of DBMS_XDBZ Subprograms

See Also:
Oracle XML DB Developer's Guide

Using DBMS_XDBZ

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

Security Model
Constants

Security Model

Owned by XDB, the DBMS_XDBZ package must be created by SYS or XDB. The EXECUTE privilege is granted to PUBLIC. Subprograms in this package are executed using the privileges of the current user.

Constants

The DBMS_XDBZ package uses the constants shown in following tables.

DBMS_XDBZ Constants - Name Format
DBMS_XDBZ Constants - Enable Option
DBMS_XDBZ Constants - Enable Option Exercised

Table 168-1 DBMS_XDBZ Constants - Name Format

Constant	Type	Value	Description
NAME_FORMAT_SHORT	`PLS_INTEGER`	`1`	DB user name or LDAP nickname
NAME_FORMAT_DISTINGUISHED	`PLS_INTEGER`	`2`	LDAP distinguished name

Table 168-2 DBMS_XDBZ Constants - Enable Option

Constant	Type	Value	Description
ENABLE_CONTENTS	`PLS_INTEGER`	`1`	Enables hierarchy for contents and is used by users when calling the ENABLE_HIERARCHY Procedure
`ENABLE_RESMETADATA`	`PLS_INTEGER`	`2`	Enables hierarchy for resource metadata, that is, this table will store schema based custom metadata for resources

Table 168-3 DBMS_XDBZ Constants - Enable Option Exercised

Constant	Type	Value	Description
`IS_ENABLED_CONTENTS`	`PLS_INTEGER`	`1`	If hierarchy was enabled for contents, that is, the ENABLE_HIERARCHY Procedurewas called with `hierarchy_type` as `ENABLE_CONTENTS`
`IS_ENABLED_RESMETADATA`	`PLS_INTEGER`	`2`	If hierarchy was enabled for resource metadata, that is, the ENABLE_HIERARCHY Procedure was called with `hierarchy_type` as `ENABLE_RESMETADATA`

Summary of DBMS_XDBZ Subprograms

Table 168-4 DBMS_XDBZ Package Subprograms

Method	Description
DISABLE_HIERARCHY Procedure	Disables repository support for the specified `XMLTYPE` table or view
ENABLE_HIERARCHY Procedure	Enables repository support for the specified `XMLType` table or view
GET_ACLOID Function	Retrieves the ACL Object ID for the specified resource
GET_USERID Function	Retrieves the user ID for the specified user
IS_HIERARCHY_ENABLED Function	Determines if repository support for the specified `XMLType` table or view is enabled
PURGELDAPCACHE Function	Purges the LDAP nickname cache

DISABLE_HIERARCHY Procedure

This procedure disables repository support for a particular XMLType table or view.

Syntax

DBMS_XDBZ.DISABLE_HIERARCHY(
   object_schema IN VARCHAR2,
   object_name   IN VARCHAR2);

Parameters

Table 168-5 DISABLE_HIERARCHY Procedure Parameters

Parameter	Description
`object_schema`	The schema name of the `XMLType` table or view
`object_name`	The name of the `XMLType` table or view

ENABLE_HIERARCHY Procedure

This procedure enables repository support for a particular XMLType table or view. This allows the use of a uniform ACL-based security model across all documents in the repository.

GET_ACLOID Function

This function retrieves the ACL Object ID for the specified resource, if the repository path is known.

Syntax

DBMS_XDBZ.GET_ACLOID(
   aclpath   IN   VARCHAR2,
   acloid    OUT  RAW)
 RETURN BOOLEAN;

Parameters

Table 168-7 GET_ACLOID Function Parameters

Parameter	Description
`aclpath`	ACL resource path for the repository
`acloid`	The returned Object ID

Return Values

Returns TRUE if successful.

GET_USERID Function

This function retrieves the user ID for the specified user name. The local database is searched first, and if found, the USERID is returned in 4-byte database format. Otherwise, the LDAP directory is searched, if available, and if found, the USERID is returned in 4-byte database format.

Syntax

DBMS_XDBZ.GET_USERID(
   username IN  VARCHAR2,
   userid   OUT RAW,
   format   IN  BINARY_INTEGER := NAME_FORMAT_SHORT)
 RETURN BOOLEAN;

Parameters

Table 168-8 GET_USERID Function Parameters

Parameter Description

Parameter	Description
`username`	Name of the database or LDAP user.
`userid`	Return parameter for the matching user id.
`format`	Format of the specified user name; valid options are: `DBMS_XDBZ.NAME_FORMAT_SHORT` (default) -- DB user name or LDAP nickname `DBMS_XDBZ.NAME_FORMAT_DISTINGUISHIED` -- LDAP distinguished name.

username

Name of the database or LDAP user.

userid

Return parameter for the matching user id.

format

Format of the specified user name; valid options are:

DBMS_XDBZ.NAME_FORMAT_SHORT (default) -- DB user name or LDAP nickname
DBMS_XDBZ.NAME_FORMAT_DISTINGUISHIED -- LDAP distinguished name.

Return Values

Returns TRUE if successful.

IS_HIERARCHY_ENABLED Function

This function determines if repository support for the specified XMLType table or view is enabled.

Syntax

DBMS_XDBZ.IS_HIERARCHY_ENABLED(
   object_schema   IN  VARCHAR2,
   object_name     IN  VARCHAR2,
   hierarchy_type  IN  PLS_INTEGER := IS_ENABLED_CONTENTS)
 RETURN BOOLEAN;

Parameters

Table 168-9 IS_HIERARCHY_ENABLED Function Parameters

Parameter Description

object_schema

The schema name of the XMLType table or view

object_name

The name of the XMLType table or view

hierarchy_type

The type of hierarchy to check for.

IS_ENABLED_CONTENTS - if hierarchy was enabled for contents, that is, the ENABLE_HIERARCHY Procedurewas called with hierarchy_type as ENABLE_CONTENTS
IS_ENABLED_RESMETADATA - if hierarchy was enabled for resource metadata, that is, the ENABLE_HIERARCHY Procedure was called with hierarchy_type as ENABLE_RESMETADATA

Return Values

Returns TRUE if the given XMLTYPE table or view has the XDB Hierarchy enabled with the specified type.

PURGELDAPCACHE Function

This function purges the LDAP nickname cache. Returns TRUE if successful.

Syntax

DBMS_XDBZ.PURGELDAPCACHE
 RETURN BOOLEAN;