163 DBMS_XDB

The DBMS_XDB package supports the following features:

Resource Management subprograms which complement Resource Views
The Access Control List (ACL)-based Security Mechanism
Configuration Session Management
Creation of the XDB username
See Also:
- Oracle XML DB Developer's Guide
- Oracle Database New Features Guide

This chapter contains the following topics:

Using DBMS_XDB
- Overview
- Constants
Summary of DBMS_XDB Subprograms

Using DBMS_XDB

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

Overview
Constants

Overview

The DBMS_XDB package supports the following features:

The Resource Management functionality providesLINK Procedures, EXISTSRESOURCE Function, LOCKRESOURCE Function, GETLOCKTOKEN Procedure, UNLOCKRESOURCE Function, CREATERESOURCE Functions, RENAMERESOURCE Procedure, DELETERESOURCE Procedure, GETRESOID Function, CREATEOIDPATH Function, REBUILDHIERARCHICALINDEX Procedure and CREATEFOLDER Function subprograms which complement Resource Views.
The Access Control List (ACL)-based Security Mechanism can be used with in-hierarchy ACLs stored by the database or in-memory ACLs that may be stored outside the database. Some of these methods can be used for both Oracle resources and arbitrary database objects. Use CHECKPRIVILEGES Function, GETACLDOCUMENT Function, CHANGEPRIVILEGES Function and GETCHILDRESPATHS Function for Oracle Resources. ACLCHECKPRIVILEGES Function provides access to Oracle's ACL-based Security mechanism without storing objects in the Hierarchy.
Configuration Session Management is supported by CFG_REFRESH Procedure, CFG_GET Function and CFG_UPDATE Procedure. methods.
The XDB username is created during XDB installation. This user owns a set of default tables and packages. GETXDB_TABLESPACE Function and MOVEXDB_TABLESPACE Procedure enable movement of schemas to a specified tablespace, and support the default SYSAUX tablespace introduction

Constants

Table 163-1 Defined Constants for DBMS_XDB

Constant	Type	Value	Description
`DELETE_RESOURCE`	`NUMBER`	1	Deletes a resource; fails if the resource has children.
`DELETE_RECURSIVE`	`NUMBER`	2	Deletes a resource and its children, if any.
`DELETE_FORCE`	`NUMBER`	3	Deletes the resource, even if the object it contains is invalid.
`DELETE_RECURSIVE_FORCE`	`NUMBER`	4	Deletes a resource and its children, if any, even if the object it contains is invalid.

Summary of DBMS_XDB Subprograms

Table 163-2 DBMS_XDB Package Subprograms

Subprogram	Description
ACLCHECKPRIVILEGES Function	Checks access privileges granted to the current user by specified ACL document on a resource whose owner is specified by the 'owner' parameter.
ADDHTTPEXPIREMAPPING Procedure	Adds to `xdb$config` a mapping of the URL pattern to an expiration date. This will control the Expire headers for URLs matching the pattern.
ADDMIMEMAPPING Procedure	Adds a mime mapping to the XDB configuration
ADDSCHEMALOCMAPPING Procedure	Adds a schema location mapping to the XDB configuration
ADDSERVLET Procedure	Adds a servlet to XDB configuration
ADDSERVLETMAPPING Procedure	Adds a servlet mapping to XDB configuration
ADDSERVLETSECROLE Procedure	Adds a security role `REF` to a specified servlet in the XDB configuration
ADDXMLEXTENSION Procedure	Adds adds an XML extension to the XDB configuration
APPENDPATH Procedure	Appends a childpath to a parentpath
APPENDPATH Procedure	Takes in user-defined metadata either as a `REF` to `XMLTYPE` or an `XMLTYPE` and adds it to the desired resource
CFG_GET Function	Retrieves the session's configuration information
CFG_REFRESH Procedure	Refreshes the session's configuration information to the latest configuration
CFG_UPDATE Procedure	Updates the configuration information
CHANGEOWNER Procedure	Changes the owner of the resource/s to the specified owner.
CHANGEPRIVILEGES Function	Adds a specified ACE to a specified resource's ACL
CHECKPRIVILEGES Function	Checks access privileges granted to the current user on the specified resource
CREATEFOLDER Function	Creates a new folder resource in the hierarchy
CREATEOIDPATH Function	Creates a virtual path to the resource based on object ID
CREATERESOURCE Functions	Creates a new resource
DELETEHTTPEXPIREMAPPING Procedure	Deletes from `xdb$config` all mappings of the URL pattern to an expiration date
DELETEMIMEMAPPING Procedure	Deletes the mime mapping from the XDB configuration
DELETERESOURCE Procedure	Deletes a resource from the hierarchy
DELETERESOURCEMETADATA Procedures	Deletes metadata from a resource (can be used for schema-based or nonschema-based metadata)
DELETESCHEMALOCMAPPING Procedure	Deletes the schema location mapping for the specified schema URL from the XDB configuration.
DELETESERVLET Procedure	Deletes a servlet from XDB configuration
DELETESERVLETMAPPING Procedure	Deletes the servlet mapping for the specified servlet name from the XDB configuration
DELETESERVLETSECROLE Procedure	Deletes the specified role from a servlet in the XDB configuration
DELETEXMLEXTENSION Procedure	Deletes the specified XML extension from the XDB configuration
EXISTSRESOURCE Function	Determines if a resource is the hierarchy, based on its absolute path
GETACLDOCUMENT Function	Retrieves ACL document that protects resource given its path name
GETCHILDRESPATHS Function	Returns a cursor over the absolute paths of all the child resources
GETCONTENTBLOB Function	Retrieves the contents of a resource returned as a BLOB
GETCONTENTCLOB Function	Retrieves the contents of a resource returned as a CLOB
GETCONTENTVARCHAR2 Function	Retrieves the contents of a resource returned as a string
GETCONTENTXMLREF Function	Retrieves the contents of a resource returned as a a `REF` to an `XMLTYPE`
GETCONTENTXMLTYPE Function	Retrieves the contents of a resource returned as an `XMLTYPE`
GETFTPPORT Function	Gets the value of the current FTP port
GETHTTPPORT Function	Gets the value of the current HTTP port
GETLOCKTOKEN Procedure	Returns that resource's lock token for the current user given a path to a resource
GETLISTENERENDPOINT Procedure	Retrieves the parameters of a listener end point corresponding to the XML DB HTTP server
GETRESOID Function	Returns the object ID of the resource from its absolute path
GETXDB_TABLESPACE Function	Returns the current tablespace of the XDB (user)
HASBLOBCONTENT Function	Returns `TRUE` if the resource has BLOB content
HASCHARCONTENT Function	Returns `TRUE` if the resource has character content
HASXMLCONTENT Function	Returns `TRUE` if the resource has XML content
HASXMLREFERENCE Function	Returns `TRUE` if the resource has `REF` to XML content
ISFOLDER Function	Returns `TRUE` if the resource is a folder or container
LINK Procedures	Creates a link to an existing resource
LOCKRESOURCE Function	Gets a WebDAV-style lock on that resource given a path to that resource
MOVEXDB_TABLESPACE Procedure	Moves the XDB (user) to the specified tablespace
PROCESSLINKS Procedure	Processes document links in the specified resource
PURGERESOURCEMETADATA Procedure	Deletes all user metadata from a resource
REBUILDHIERARCHICALINDEX Procedure	Rebuilds the hierarchical index after import or export operations
RENAMERESOURCE Procedure	Renames the XDB resource
SETACL Procedure	Sets the ACL on a specified resource
SETCONTENT Procedures	Replaces the contents of a specified resource with specified datatype
SETFTPPORT Procedure	Sets the FTP port to a new value
SETHTTPPORT Procedure	Sets the HTTP port to a new value
SETLISTENERENDPOINT Procedure	Sets the parameters of a listener end point corresponding to the XML DB HTTP server
SETLISTENERLOCALACCESS Procedure	Restricts all listener end points of the XML DB HTTP server to listen either only on the localhost interface or on both localhost and non-localhost interfaces
SPLITPATH Procedure	Splits the path into a parentpath and childpath
TOUCHRESOURCE Procedure	Changes the modification time of the resource to the current time
UPDATERESOURCEMETADATA Procedures	Updates metadata for a resource
UNLOCKRESOURCE Function	Unlocks the resource given a lock token and resource path

ACLCHECKPRIVILEGES Function

This function checks access privileges granted to the current user by specified ACL document by the OWNER of the resource. Returns positive integer if all privileges are granted.

Syntax

DBMS_XDB.ACLCHECKPRIVILEGES(
   acl_path  IN  VARCHAR2,
   owner     IN  VARCHAR2,
   privs     IN  xmltype)
 RETURN PLS_INTEGER;

Parameters

Table 163-3 ACLCHECKPRIVILEGES Function Parameters

Parameter	Description
`acl_path`	Absolute path in the Hierarchy for ACL document
`owner`	Resource owner name; the pseudo user "DAV:owner" is replaced by this user during ACL privilege resolution
`privs`	An `XMLType` instance of the privilege element specifying the requested set of access privileges. See description for CHECKPRIVILEGES Function.

ADDHTTPEXPIREMAPPING Procedure

This procedure adds to xdb$config a mapping of the URL pattern to an expiration date. This will control the Expire headers for URLs matching the pattern.

Syntax

DBMS_XDB.ADDHTTPEXPIREMAPPING (
     pattern    IN    VARCHAR2,
     expire     IN    VARCHAR2);

Parameters

Table 163-4 ADDHTTPEXPIREMAPPING Procedure Parameters

Parameter Description

pattern

URL pattern (only * accepted as wildcards)

expire

Expiration directive, follows the ExpireDefault in Apache's mod_expires:

base [plus] (num type)*
-- base: now | modification
-- type: year|years|month|months|week|weeks|day|days|
minute|minutess|second|seconds

Examples

DBMS_XDB.ADDHTTPEXPIREMAPPING ('/public/test1/*', 'now plus 4 weeks');
DBMS_XDB.ADDHTTPEXPIREMAPPING (
             '/public/test2/*', 'modification plus 1 day 30 seconds');

ADDMIMEMAPPING Procedure

This procedure adds the following mime mapping to XDB configuration:

<mime-mapping>
<extension>extension</extension>
<mime-type>mimetype</mime-type>
</mime-mapping>

Syntax

DBMS_XDB.ADDMIMEMAPPING(
     extension    IN   VARCHAR2,
     mimetype     IN   VARCHAR2);

Parameters

Table 163-5 ADDMIMEMAPPING Procedure Parameters

Parameter	Description
`extension`	Extension for which a mime type is being added
`mimetype`	Mime type

ADDSCHEMALOCMAPPING Procedure

This procedure adds the following schema location mapping to the XDB configuration:

<schemaLocation-mapping>
     <namespace>namespace</namespace>
     <element>element</element>
      <schemaURL>schemaURL</schemaURL>
</schemaLocation-mapping>

Syntax

DBMS_XDB.ADDSCHEMALOCMAPPING(
     namespace    IN   VARCHAR2,
     element      IN   VARCHAR2,
     schemaURL    IN   VARCHAR2);

Parameters

Table 163-6 ADDSCHEMALOCMAPPING Procedure Parameters

Parameter	Description
`namespace`	Namespace
`element`	Element
`schemaURL`	Schema URL

ADDSERVLET Procedure

This procedure adds the following servlet to XDB configuration:

<servlet>
     <servlet-name>name</servlet-name>     <servlet-language>language</servlet-language>
     <display-name>dispname</display-name>
     <description>descript</description>
     <servlet-class>class</servlet-class>
     <servlet-schema>schema</servlet-schema>
</servlet>

Syntax

DBMS_XDB.ADDSERVLET(
     name       IN   VARCHAR2,
    language    IN   VARCHAR2,
    dispname    IN   VARCHAR2,
    icon        IN   VARCHAR2 := NULL,
    descript    IN   VARCHAR2 := NULL,
    class       IN   VARCHAR2 := NULL,
    jspfile     IN   VARCHAR2 := NULL,
    plsql       IN   VARCHAR2 := NULL);

Parameters

Table 163-7 ADDSERVLET Procedure Parameters

Parameter	Description
`name`	Servlet name
`language`	Must be one of "C", "Java", "PL/SQL"
`dispname`	Display name
`icon`	Icon
`descript`	Description
`class`	The `class` / `jspfile` / `plsql` function corresponding to this servlet. The first non-`NULL` argument amongst these three is chosen, and the others are treated as `NULL`.
`jspfile`	The `class` / `jspfile` / `plsql` function corresponding to this servlet. The first non-`NULL` argument amongst these three is chosen, and the others are treated as `NULL`.
`plsql`	The `class` / `jspfile` / `plsql` function corresponding to this servlet. The first non-`NULL` argument amongst these three is chosen, and the others are treated as `NULL`.
`schema`	Schema

ADDSERVLETMAPPING Procedure

This procedure adds the following servlet mapping to XDB configuration:

<servlet-mapping>     <servlet-pattern>pattern</servlet-pattern>     <servlet-name>name</servlet-name></servlet-mapping>

Syntax

DBMS_XDB.ADDSERVLETMAPPING(
     pattern   IN   VARCHAR2,     name      IN   VARCHAR2);

Parameters

Table 163-8 ADDSERVLETMAPPING Procedure Parameters

Parameter	Description
`pattern`	Sservlet pattern
`name`	Servlet name

ADDSERVLETSECROLE Procedure

This procedure adds the following security role REF to a specified servlet in XDB configuration:

<security-role-ref>
     <role-name>rolename</role-name>
     <role-link>rolelink</role-link>
     <description>descript</description>
</security-role-ref>

Syntax

DBMS_XDB.ADDSERVLETSECROLE(
     servname    IN   VARCHAR2,     rolename    IN   VARCHAR2,     rolelink    IN   VARCHAR2,     descript    IN   VARCHAR2 := NULL);

Parameters

Table 163-9 ADDSERVLETSECROLE Procedure Parameters

Parameter	Description
`servname`	Sservlet name
`rolename`	Role name
`rolelink`	Role link
`descript`	Description

ADDXMLEXTENSION Procedure

This procedure adds the following XML extension to the XDB configuration under <xml-extensions>:

<extension>extension</extension>

Syntax

DBMS_XDB.ADDXMLEXTENSION(
     extension    IN   VARCHAR2);

Parameters

Table 163-10 ADDXMLEXTENSION Procedure Parameters

Parameter	Description
`extension`	XML extension to be added

APPENDPATH Procedure

This procedure appends a childpath to a parentpath.

Syntax

DBMS_XDB.APPENDPATH (
     abspath       OUT   VARCHAR2,     parentpath    IN    VARCHAR2,    childpath      IN    VARCHAR2);

Parameters

Table 163-11 APPENDPATH Procedure

Parameter	Description
`abspath`	Absolute path of the resource
`parentpath`	Parentpath
`childpath`	Childpath

APPENDRESOURCEMETADATA Procedure

This procedure takes in user-defined metadata either as a REF to XMLTYPE or an XMLTYPE and adds it to the desired resource.

Syntax

DBMS_XDB.APPENDRESOURCEMETADATA (
 abspath   IN  VARCHAR2, 
 metadata  IN  XMLTYPE);

DBMS_XDB.APPENDRESOURCEMETADATA (
 abspath   IN  VARCHAR2, 
 metadata  IN  REF SYS.XMLTYPE);

Parameters

Table 163-12 APPENDRESOURCEMETADATA Procedure

Parameter	Description
`abspath`	Absolute path of the resource
`metadata`	Metadata can be schema based or nonschema-based. Schema-based metadata is stored in its own table.

Usage Notes

In the case in which a REF is passed in, the procedure stores the REF in the resource, and the metadata is stored in a separate table. In this case you are responsible for populating the RESID column for the metadata table. Note that theREF passed in must be unique. In other words, there must not be aREF with the same value in the resource metadata, as this would violate uniqueness of properties. An error is thrown if users attempt to add a REF that already exists.
In the case where the XMLTYPE is passed in, the data is parsed to determine if it is schema-based or not and stored accordingly.

CFG_GET Function

This function retrieves the session's configuration information as an XMLType instance.

Syntax

DBMS_XDB.CFG_GET 
 RETURN SYS.XMLType;

CFG_REFRESH Procedure

This procedure refreshes the session's configuration information to the latest configuration.

Syntax

DBMS_XDB.CFG_REFRESH;

CFG_UPDATE Procedure

This procedure updates the configuration information and commits the change.

Syntax

DBMS_XDB.CFG_UPDATE(
   xdbconfig   IN  SYS.XMLTYPE);

Parameters

Table 163-13 CFG_UPDATE Procedure Parameters

Parameter	Description
`xdbconfig`	The new configuration data

CHANGEOWNER Procedure

This procedure changes the owner of the resource/s to the specified owner.

Syntax

DBMS_XDB.CHANGEOWNER(
     abspath    IN   VARCHAR2,
     owner      IN   VARCHAR2,
     recurse    IN   BOOLEAN := FALSE);

Parameters

Table 163-14 CHANGEOWNER Procedure Parameters

Parameter	Description
`abspath`	Absolute path of the resource
`owner`	New owner for the resource
`recurse`	If `TRUE`, recursively change owner of all resources in the folder tree

CHANGEPRIVILEGES Function

This function adds a specified ACE to a specified resource's ACL.

Syntax

DBMS_XDB.CHANGEPRIVILEGES(
   res_path   IN    VARCHAR2,
   ace        IN    xmltype)
 RETURN PLS_INTEGER;

Parameters

Table 163-15 CHANGEPRIVILEGES Function Parameters

Parameter	Description
`res_path`	Path name of the resource for which privileges need to be changed
`ace`	An `XMLType` instance of the `<ace>` element which specifies the `<principal>`, the operation `<grant>` and the list of privileges

Return Values

A positive integer if the ACL was successfully modified.

Usage Notes

If no ACE with the same principal and the same operation (grant/deny) already exists in the ACL, the new ACE is added at the end of the ACL.

CHECKPRIVILEGES Function

This function checks access privileges granted to the current user on the specified resource.

Syntax

DBMS_XDB.CHECKPRIVILEGES(
   res_path   IN  VARCHAR2,
   privs      IN  xmltype)
 RETURN PLS_INTEGER;

Parameters

Table 163-16 CHECKPRIVILEGES Function Parameters

Parameter	Description
`res_path`	Absolute path in the Hierarchy for resource
`privs`	An `XMLType` instance of the privilege element specifying the requested set of access privileges

Return Values

A positive integer if all requested privileges granted.

CREATEFOLDER Function

This function creates a new folder resource in the hierarchy.

Syntax

DBMS_XDB.CREATEFOLDER(
   path   IN  VARCHAR2)
 RETURN BOOLEAN;

Parameters

Table 163-17 CREATEFOLDER Function Parameters

Parameter	Description
`path`	Path name for the new folder

Return Values

TRUE if operation successful; FALSE, otherwise.

Usage Notes

The given path name's parent folder must already exist in the hierarchy: if '/folder1/folder2' is passed as the path parameter, then '/folder1' must already exist.

CREATEOIDPATH Function

This function creates a virtual path to the resource based on object ID.

Syntax

DBMS_XDB.CREATEOIDPATH(
   oid    IN   RAW)
 RETURN VARCHAR2;

Parameters

Table 163-18 CREATEOIDPATH Function Parameters

Parameter	Description
`oid`	Object ID of the resource

CREATERESOURCE Functions

The functions create a new resource. The description of the overload options precede each version of the syntax

Syntax

Creates a new resource with a specified string as its contents:

DBMS_XDB.CREATERESOURCE( 
     abspath        IN  VARCHAR2,
     data           IN  VARCHAR2,
     createfolders  IN  BOOLEAN := FALSE)
 RETURN BOOLEAN;

Creates a new resource with a specified XMLType data as its contents:

DBMS_XDB.CREATERESOURCE(
     abspath        IN  VARCHAR2,
     data           IN  SYS.XMLTYPE,
     createfolders  IN  BOOLEAN := FALSE)
 RETURN BOOLEAN;

Given a REF to an existing XMLType row, creates a resource whose contents point to that row. That row should not already exist inside another resource:

DBMS_XDB.CREATERESOURCE(
     abspath        IN  VARCHAR2,
     datarow        IN  REF SYS.XMLTYPE,
     createfolders  IN  BOOLEAN := FALSE)
 RETURN BOOLEAN;

Creates a resource with a specified BLOB as its contents, and specifies character set of the source BLOB:

DBMS_XDB.CREATERESOURCE(
     abspath        IN  VARCHAR2,
     data           IN  BLOB,
     csid           IN  NUMBER :=0,
     createfolders  IN  BOOLEAN := FALSE)
 RETURN BOOLEAN;

Creates a resource with a specified BFILE as its contents, and specifies character set of the source BFILE:

DBMS_XDB.CREATERESOURCE ( 
     abspath        IN  VARCHAR2,
     data           IN  BFILE,
     csid           IN  NUMBER :=0,
     createfolders  IN  BOOLEAN := FALSE)
 RETURN BOOLEAN;

Creates a resource with a specified CLOB as its contents:

DBMS_XDB.CREATERESOURCE (
     abspath        IN  VARCHAR2,
     data           IN  CLOB,
     createfolders  IN  BOOLEAN := FALSE)
 RETURN BOOLEAN;

Given a string, inserts a new resource into the hierarchy with the string as the contents:

DBMS_XDB.CREATERESOURCE (
   abspath        IN  VARCHAR2, 
   data           IN  VARCHAR2,
   schemaurl      IN  VARCHAR2 := NULL,
   elem           IN  VARCHAR2 := NULL)
 RETURN BOOLEAN;

Given an XMLTYPE and a schema URL, inserts a new resource into the hierarchy with the XMLTYPE as the contents:

DBMS_XDB.CREATERESOURCE (
   abspath        IN  VARCHAR2, 
   data           IN  SYS.XMLTYPE,
   schemaurl      IN  VARCHAR2 := NULL,
   elem           IN  VARCHAR2 := NULL)
 RETURN BOOLEAN;

Parameters

Table 163-19 CREATERESOURCE Function Parameters

Parameter	Description
`abspath`	Absolute path of the resource to create. The path name's parent folder must already exist in the hierarchy. In other words, if `/foo/bar.txt` is passed in, then folder `/foo` must already exist.
`data`	String buffer containing new resource's contents. The data is parsed to check if it contains a schema-based XML document, and the contents are stored as schema-based in the schema's default table. Otherwise, it is saved as binary data.
`datarow`	`REF` to an `XMLType` row to be used as the contents
`csid`	Character set id of the document. Must be a valid Oracle ID; otherwise returns an error. If CSID is not specified, or if a zero CSID is specified, then the character set id of the document is determined as follows: From the abspath extension, determine the resource's MIME type. If the MIME type is */xml, then the encoding is detected based on Appendix F of the W3C XML 1.0 Reference at `http://www.w3.org/TR/2000/REC-xml-20001006`; Otherwise, it is defaulted to the database character set.
`createfolders`	If `TRUE`, create the parent folders if they do not exist
`schemaurl`	For XML data, schema URL data conforms to (default `NULL`)
`elem`	Element name (default `NULL`)

Return Values

TRUE if operation successful; FALSE, otherwise.

DELETEHTTPEXPIREMAPPING Procedure

This procedure deletes from xdb$config all mappings of the URL pattern to an expiration date.

Syntax

DBMS_XDB.DELETEHTTPEXPIREMAPPING(
     pattern  IN   VARCHAR2);

Parameters

Table 163-20 DELETEHTTPEXPIREMAPPING Procedure Parameters

Parameter	Description
`pattern`	URL pattern (only * accepted as wildcards)

DELETEMIMEMAPPING Procedure

This procedure deletes the mime mapping for a specified extension from the XDB configuration.

Syntax

DBMS_XDB.DELETEMIMEMAPPING(
     extension    IN   VARCHAR2);

Parameters

Table 163-21 DELETEMIMEMAPPING Procedure Parameters

Parameter	Description
`extension`	Extension for which a mime type is to be deleted

DELETERESOURCE Procedure

This procedure deletes a resource from the hierarchy.

Syntax

DBMS_XDB.DELETERESOURCE(
   path          IN      VARCHAR2,
   delete_option IN      PLS_INTEGER);

Parameters

Table 163-22 DELETERESOURCE Procedure Parameters

Parameter Description

Parameter	Description
`path`	Path name of the resource to delete
`delete_option`	The option that controls how a a resource is deleted; defined in Table 163-1: `DELETE_RESOURCE` `DELETE_RECURSIVE` `DELETE_FORCE` `DELETE_RECURSIVE_FORCE`

path

Path name of the resource to delete

delete_option

The option that controls how a a resource is deleted; defined in Table 163-1:

DELETE_RESOURCE
DELETE_RECURSIVE
DELETE_FORCE
DELETE_RECURSIVE_FORCE

DELETERESOURCEMETADATA Procedures

This procedure takes in a resource by absolute path and removes either the schema-based metadata identified by the REF, or the metadata identified by the namespace and name combination, which can be either schema-based or non-schema based. It also takes an additional (optional) parameter that specifies how to delete it. This parameter is only relevant for schema-based resource metadata that needs to be deleted. For non-schema based metadata, this parameter is ignored.

Syntax

Can be used only for schema-based metadata:

DBMS_XDB.DELETERESOURCEMETADATA (
   abspath        IN  VARCHAR2, 
   metadata       IN  REF SYS.XMLTYPE,
   delete_option  IN  pls_integer := dbms_xdb.DELETE_RESOURCE_METADATA_CASCADE);

Can be used for schema-based or nonschema-based metadata:

DBMS_XDB.DELETERESOURCEMETADATA (
   abspath        IN VARCHAR2,
   metadatans     IN VARCHAR2,
   metadataname   IN VARCHAR2,
   delete_option  IN pls_integer := dbms_xdb.DELETE_RESOURCE_METADATA_CASCADE);

Parameters

Table 163-23 DELETERESOURCEMETADATA Procedure Parameters

Parameter	Description
`abspath`	Absolute path of the resource
`metadata`	`REF` to the piece of metadata (schema based) to be deleted
`mettadatans`	Namespace of the metadata fragment to be removed
`mettadataname`	Local name of the metadata fragment to be removed
`delete_option`	Only applicable for schema-based metadata, this can be one of the following: `DELETE_RES_METADATA_CASCADE` - deletes the corresponding row in the metadata table `DELETE_RES_METADATA_NOCASCADE` - does not delete the row in the metadata table

DELETESCHEMALOCMAPPING Procedure

This procedure deletes the schema location mapping for a specified schema URL from the XDB configuration.

Syntax

DBMS_XDB.DELETESCHEMALOCMAPPING(
     schemaURL    IN   VARCHAR2);

Parameters

Table 163-24 DELETESCHEMALOCMAPPING Procedure Parameters

Parameter	Description
`schemaURL`	Schema URL

DELETESERVLET Procedure

This procedure deletes a servlet from the XDB configuration.

Syntax

DBMS_XDB.DELETESERVLET(
     name        IN   VARCHAR2);

Parameters

Table 163-25 DELETESERVLET Procedure Parameters

Parameter	Description
`name`	Servlet name

DELETESERVLETMAPPING Procedure

This procedure deletes the servlet mapping for a specified servlet name from the XDB configuration.

Syntax

DBMS_XDB.DELETESERVLETMAPPING(
     name      IN   VARCHAR2);

Parameters

Table 163-26 DELETESERVLETMAPPING Procedure Parameters

Parameter	Description
`name`	Servlet name

DELETESERVLETSECROLE Procedure

This procedure deletes the specified role from a servlet in the XDB configuration.

Syntax

DBMS_XDB.DELETESERVLETSECROLE(
     servname    IN   VARCHAR2,     rolename    IN   VARCHAR2);

Parameters

Table 163-27 DELETESERVLETSECROLE Procedure Parameters

Parameter	Description
`servname`	Servlet name
`rolename`	Name of the role to be deleted

DELETEXMLEXTENSION Procedure

This procedure deletes the specified XML extension from the XDB configuration.

Syntax

DBMS_XDB.DELETEXMLEXTENSION(
     extension    IN   VARCHAR2);

Parameters

Table 163-28 DELETEXMLEXTENSION Procedure Parameters

Parameter	Description
`extension`	XML extension to be deleted

EXISTSRESOURCE Function

This function indicates if a resource is in the hierarchy. Matches resource by a string that represents its absolute path.

Syntax

DBMS_XDB.EXISTSRESOURCE(
   abspath    IN    VARCHAR2)
 RETURN BOOLEAN;

Parameters

Table 163-29 EXISTSRESOURCE Function Parameters

Parameter	Description
`abspath`	Path name of the resource whose ACL document is required

Return Values

TRUE if the resource is found.

GETACLDOCUMENT Function

This function retrieves ACL document that protects resource given its path name.

Syntax

DBMS_XDB.GETACLDOCUMENT(
   abspath  IN  VARCHAR2)
  RETURN sys.xmltype;

Parameters

Table 163-30 GETACLDOCUMENT Function Parameters

Parameter	Description
`abspath`	Path name of the resource whose ACL document is required

Return Values

The XMLType for ACL document.

GETCHILDRESPATHS Function

This function returns a cursor over the absolute paths of all the child resources.

Syntax

DBMS_XDB.GETCHILDRESPATHS(
     abspath    IN     VARCHAR2);
  RETURN SYS_REFCURSOR;

Parameters

Table 163-31 GETCHILDRESPATHS Function Parameters

Parameter	Description
`abspath`	Absolute path of the resource

Return Values

A cursor over the absolute paths of all the child resources.

GETCONTENTBLOB Function

This function retrieves the contents of a resource returned as a BLOB.

Syntax

DBMS_XDB.GETCONTENTBLOB(
     abspath    IN     VARCHAR2, 
     csid       OUT    PLS_INTEGER,
     locksrc    IN     BOOLEAN := FALSE) 
  RETURN BLOB;

Parameters

Table 163-32 GETCONTENTBLOB Function Parameters

Parameter	Description
`abspath`	Absolute path of the resource
`csid`	If `TRUE`, lock and return the source LOB. If `FALSE`, return a temp LOB copy.
locksrc	Contents of the resource as a BLOB

Return Values

The contents of the resource as a BLOB.

GETCONTENTCLOB Function

This function gets the contents of a resource returned as a CLOB.

Syntax

DBMS_XDB.GETCONTENTCLOB(
     abspath    IN     VARCHAR2,
  RETURN CLOB;

Parameters

Table 163-33 GETCONTENTCLOB Function Parameters

Parameter	Description
`abspath`	Absolute path of the resource

Return Values

The contents of the resource as a CLOB.

GETCONTENTVARCHAR2 Function

This function gets the contents of a resource returned as a string.

Syntax

DBMS_XDB.GETCONTENTVARCHAR2(
     abspath    IN     VARCHAR2,
  RETURN BLOB;

Parameters

Table 163-34 GETCONTENTVARCHAR2 Function Parameters

Parameter	Description
`abspath`	Absolute path of the resource

Return Values

The contents of the resource as a string.

GETCONTENTXMLREF Function

This function retrieves the contents of a resource returned as a a REF to an XMLTYPE.

Syntax

DBMS_XDB.GETCONTENTXMLREF(
     abspath    IN     VARCHAR2,
  RETURN SYS.XMLTYPE;

Parameters

Table 163-35 GETCONTENTXMLREF Function Parameters

Parameter	Description
`abspath`	Absolute path of the resource

Return Values

The contents of the resource as a REF to an XMLTYPE.

GETCONTENTXMLTYPE Function

This function retrieves the contents of a resource returned as an XMLTYPE.

Syntax

DBMS_XDB.GETCONTENTXMLTYPE(
     abspath    IN     VARCHAR2,
  RETURN SYS.XMLTYPE;

Parameters

Table 163-36 GETCONTENTXMLTYPE Function Parameters

Parameter	Description
`abspath`	Absolute path of the resource

Return Values

The contents of the resource as an XMLTYPE.

GETFTPPORT Function

This procedure gets the value of the current FTP port.

Syntax

DBMS_XDB.GETFTPPORT
 RETURN NUMBER;

GETHTTPPORT Function

This procedure gets the value of the current HTTP port.

Syntax

DBMS_XDB.GETHTTPPORT
 RETURN NUMBER;

GETLISTENERENDPOINT Procedure

This procedure retrieves the parameters of a listener end point corresponding to the XML DB HTTP server. The parameters of both HTTP and HTTP2 end points can be retrieved by invoking this procedure.

Syntax

DBMS_XDB.GETLISTENERENDPOINT (
   endpoint  IN   NUMBER, 
   host      OUT  VARCHAR2,    port      OUT  NUMBER, 
   protocol  OUT  NUMBER);

Parameters

Table 163-37 GETLISTENERENDPOINT Procedure Parameters

Parameter	Description
`endpoint`	End point to be retrieved. Its value can be `XDB_ENDPOINT_HTTP` or `XDB_ENDPOINT_HTTP2`.
`host`	Interface on which the listener end point listens
`port`	Port on which the listener end point listens
`protocol`	Transport protocol accepted by the listener end point

GETLOCKTOKEN Procedure

Given a path to a resource, this procedure returns that resource's lock token for the current user.

Syntax

DBMS_XDB.GETLOCKTOKEN(
   path         IN      VARCHAR2,
   locktoken    OUT     VARCHAR2);

Parameters

Table 163-38 GETLOCKTOKEN Procedure Parameters

Parameter	Description
`path`	Path name to the resource
`locktoken`	Logged-in user's lock token for the resource

Usage Notes

The user must have READPROPERTIES privilege on the resource.

GETPRIVILEGES Function

This function gets all privileges granted to the current user on a specified resource.

Syntax

DBMS_XDB.GETPRIVILEGES(
   res_path    IN     VARCHAR2)
 RETURN sys.xmltype;

Parameters

Table 163-39 GETPRIVILEGES Function Parameters

Parameter	Description
`res_path`	Absolute path in the hierarchy of the resource

Return Values

An XMLType instance of <privilege> element, which contains the list of all leaf privileges granted on this resource to the current user.

GETRESOID Function

Returns the object ID of the resource from its absolute path.

Syntax

DBMS_XDB.GETRESOID(
   abspath IN VARCHAR2)
RETURN RAW;

Parameters

Table 163-40 GETRESOID Function Parameters

Parameter	Description
`abspath_path`	Absolute path of the resource

Return Values

NULL if the resource is not present.

GETXDB_TABLESPACE Function

This function returns the current tablespace of the XDB (user).

Syntax

DBMS_XDB.GETXDB_TABLESPACE
 RETURN VARCHAR2;

HASBLOBCONTENT Function

This function returns TRUE if the resource has BLOB content.

Syntax

DBMS_XDB.DBMS_XDB.HASBLOBCONTENT 
     abspath    IN     VARCHAR2)
 RETURN BOOLEAN;

Parameters

Table 163-41 HASBLOBCONTENT Function Parameters

Parameter	Description
`abspath_path`	Absolute path of the resource

Return Values

TRUE if the resource has BOB content.

HASCHARCONTENT Function

This function returns TRUE if the resource has character content.

Syntax

DBMS_XDB.DBMS_XDB.HASCHARCONTENT 
     abspath    IN     VARCHAR2)
 RETURN BOOLEAN;

Parameters

Table 163-42 HASCHARCONTENT Function Parameters

Parameter	Description
`abspath_path`	Absolute path of the resource

Return Values

TRUE if the resource has character content.

HASXMLCONTENT Function

This function returns TRUE if the resource has XML content.

Syntax

DBMS_XDB.DBMS_XDB.HASXMLCONTENT 
     abspath    IN     VARCHAR2)
 RETURN BOOLEAN;

Parameters

Table 163-43 HASXMLCONTENT Function Parameters

Parameter	Description
`abspath_path`	Absolute path of the resource

Return Values

TRUE if the resource has XML content.

HASXMLREFERENCE Function

This function returns TRUE if the resource has a REF to XML content.

Syntax

DBMS_XDB.DBMS_XDB.HASXMLREFERENCE 
     abspath    IN     VARCHAR2)
 RETURN BOOLEAN;

Parameters

Table 163-44 HASXMLREFERENCE Function Parameters

Parameter	Description
`abspath_path`	Absolute path of the resource

Return Values

TRUE resource has a REF to XML content.

ISFOLDER Function

This function returns TRUE if the resource is a folder or container.

Syntax

DBMS_XDB.DBMS_XDB.ISFOLDER 
     abspath    IN     VARCHAR2)
 RETURN BOOLEAN;

Parameters

Table 163-45 DBMS_XDB.ISFOLDER Function Parameters

Parameter	Description
`abspath_path`	Absolute path of the resource

Return Values

TRUE if the resource is a folder or container.

LINK Procedures

This procedure creates from a specified folder to a specified resource.

Syntax

DBMS_XDB.LINK(
   srcpath      IN   VARCHAR2,
   linkfolder   IN   VARCHAR2,
   linkname     IN   VARCHAR2);

DBMS_XDB.LINK(
   srcpath      IN   VARCHAR2,
   linkfolder   IN   VARCHAR2,
   linkname     IN   VARCHAR2,
   linktype     IN   PLS_INTEGER := DBMS_XDB.LINK_TYPE_HARD);

Parameters

Table 163-46 LINK Procedure Parameters

Parameter	Description
`srcpath`	Path name of the resource to which a link is created
`linkfolder`	Folder in which the new link is placed
`linkname`	Name of the new link
`linktype`	Type of link to be created: `DBMS_XDB`.`LINK_TYPE_HARD` (default) `DBMS_XDB`.`LINK_TYPE_WEAK` `DBMS_XDB`.`LINK_TYPE_SYMBOLIC`

LOCKRESOURCE Function

Given a path to a resource, this function gets a WebDAV-style lock on that resource.

Syntax

DBMS_XDB.LOCKRESOURCE(
   path      IN  VARCHAR2,
   depthzero IN  BOOLEAN,
   shared    IN  boolean)
RETURN BOOLEAN;

Parameters

Table 163-47 LOCKRESOURCE Function Parameters

Parameter	Description
`path`	Path name of the resource to lock.
`depthzero`	Currently not supported
`shared`	Passing `TRUE` obtains a shared write lock

Return Values

TRUE if successful.

Usage Notes

The user must have UPDATE privileges on the resource.

MOVEXDB_TABLESPACE Procedure

This procedure moves the XDB (user) to the specified tablespace.

Syntax

DBMS_XDB.MOVEXDB_TABLESPACE(
   new_tablespace   IN  VARCHAR2);

Parameters

Table 163-48 MOVEXDB_TABLESPACE Procedure Parameters

Parameter	Description
`new_tablespace`	Name of the tablespace to where the XDB is moved

Usage Notes

This operation waits for all concurrent XDB sessions to exit.

PROCESSLINKS Procedure

This procedure processes document links in the specified resource.

Syntax

DBMS_XDB.PURGERESOURCEMETADATA( 
 abspath  IN  VARCHAR2,
 recurse  IN  BOOLEAN := FALSE);

Parameters

Table 163-49 PROCESSLINKS Procedure Parameters

Parameter	Description
`abspath`	Absolute path of the resource. If the path is a folder, use the `recurse` flag.
`recurse`	Used only if `abspath` specifies a folder. If `TRUE`, process links of all resources in the folder hierarchy rooted at the specified resource. If `FALSE`, process links of all documents in this folder only.

PURGERESOURCEMETADATA Procedure

This procedure deletes all user metadata from a resource. Schema-based metadata is removed in cascade mode, rows being deleted from the corresponding metadata tables.

Syntax

DBMS_XDB.PURGERESOURCEMETADATA(  
 abspath  IN  VARCHAR2);

Parameters

Table 163-50 PURGERESOURCEMETADATA Procedure Parameters

Parameter	Description
`abspath`	Absolute path of the resource

REBUILDHIERARCHICALINDEX Procedure

This procedure rebuilds the hierarchical index after import or export operations. This is necessary because data cannot be exported from index tables.

Syntax

DBMS_XDB.REBUILDHIERARCHICALINDEX;

RENAMERESOURCE Procedure

This procedure renames the XDB resource.

Syntax

DBMS_XDB.RENAMERESOURCE(
   srcpath    IN  VARCHAR2,
   destfolder IN  CARCHAR2,
   newname    IN  VARCHAR2);

Parameters

Table 163-51 RENAMERESOURCE Procedure Parameters

Parameter	Description
`srcpath`	Absolute path in the Hierarchy for the source resource destination folder
`destfolder`	Absolute path in the Hierarchy for the destination folder
`newname`	Name of the child in the destination folder

SETACL Procedure

This procedure sets the ACL on a specified resource to be the ACL specified by path.

Syntax

DBMS_XDB.SETACL(
   res_path   IN  VARCHAR2,
   acl_path   IN  VARCHAR2);

Parameters

Table 163-52 SETACL Procedure Parameters

Parameter	Description
`res_path`	Absolute path in the Hierarchy for resource
`acl_path`	Absolute path in the Hierarchy for ACL

Usage Notes

The user must have <write-acl> privileges on the resource.

SETCONTENT Procedures

This procedure replaces the contents of a resource with a specified datatype.

Syntax

Replaces the contents of the a resource with a specified CLOB:

DBMS_XDB.SETCONTENT(
     abspath    IN   VARCHAR2,
     data       IN   CLOB);

Replaces the contents of a resource with a specified BLOB:

DBMS_XDB.SETCONTENT(
     abspath    IN   VARCHAR2,
     data       IN   BLOB,
     csid    IN PLS_INTEGER);

Replaces the contents of a resource with a specified XMLTYPE:

DBMS_XDB.SETCONTENT(
     abspath    IN   VARCHAR2,
     data       IN   SYS.XMLTYPE);

Replaces the contents of a resource with a specified string:

DBMS_XDB.SETCONTENT(
     abspath    IN   VARCHAR2,
     data       IN   VARCHAR2);

Replaces the contents of a resource with a specified REF to an XMLTYPE

DBMS_XDB.SETCONTENT(
     abspath    IN   VARCHAR2,
     data       IN   CLOB,
     sticky     IN   BOOLEAN := TRUE);

Replaces the contents of a resource with a specified BFILE:

DBMS_XDB.SETCONTENT(
     abspath    IN   VARCHAR2,
     data       IN   CLOB,
     csid       IN   PLS_INTEGER);

Parameters

Table 163-53 SETCONTENT Procedure Parameters

Parameter	Description
`abspath`	Absolute path in the Hierarchy for resource
`data`	Input varying with overload: CLOB data BLOB data `XMLTYPE` data string data `REF` to `XMLTYPE` data a BFILE
`csid`	Character set id of the BLOB or BFILE
`sticky`	Whether or not the `REF` is sticky

SETFTPPORT Procedure

This procedure sets the FTP port to a new value.

Syntax

DBMS_XDB.SETFTPPORT(
   new_port  IN  NUMBER);

Parameters

Table 163-54 SETFTPPORT Procedure Parameters

Parameter	Description
`new_port`	Value to which the FTP port is set

SETHTTPPORT Procedure

This procedure sets the HTTP port to a new value.

Syntax

DBMS_XDB.SETHTTPPORT(
   new_port  IN  NUMBER);

Parameters

Table 163-55 SETHTTPPORT Procedure Parameters

Parameter	Description
`new_port`	Value to which the HTTP port is set

SETLISTENERENDPOINT Procedure

This procedure sets the parameters of a listener end point corresponding to the XML DB HTTP server. Both HTTP and HTTP2 end points can be set by invoking this procedure.

Syntax

DBMS_XDB.SETLISTENERENDPOINT (
   endpoint  IN  NUMBER, 
   host      IN  VARCHAR2,    port      IN  NUMBER, 
   protocol  IN  NUMBER);

Parameters

Table 163-56 SETLISTENERENDPOINT Procedure Parameters

Parameter	Description
`endpoint`	End point to be set. Its value can be `XDB_ENDPOINT_HTTP` or `XDB_ENDPOINT_HTTP2`.
`host`	Interface on which the listener end point is to listen. Its value can be '`LOCALHOST`,' `NULL`, or a hostname. If its value is '`LOCALHOST`' the listener end point is permitted to only listen on the localhost interface. If its value is `NULL` or hostname, the listener end point is permitted to listen on both localhost and non-localhost interfaces.
`port`	Port on which the listener end point is to listen
`protocol`	Transport protocol that the listener end point is to accept. Its value can be `XDB_PROTOCOL_TCP` or `XDB_PROTOCOL_TCPS`

SETLISTENERLOCALACCESS Procedure

This procedure restricts all listener end points of the XML DB HTTP server to listen either only on the localhost interface (when l_access is set to TRUE) or to listen on both localhost and non-localhost interfaces (when l_access is set to FALSE).

Syntax

DBMS_XDB.SETLISTENERLOCALACCESS (
   l_access   BOOLEAN);

Parameters

Table 163-57 SETLISTENERLOCALACCESS Procedure Parameters

Parameter	Description
`l_access`.	`TRUE` or `FALSE`.

SPLITPATH Procedure

This procedure splits the path into a parentpath and childpath.

Syntax

DBMS_XDB.SPLITPATH(
      abspath     IN  VARCHAR2,
      parentpath  OUT VARCHAR2,
     childpath    OUT VARCHAR2);

Parameters

Table 163-58 SPLITPATH Procedure Parameters

Parameter	Description
`abspath`	Absolute path to be split
`parentpath`	Parentpath
`childpath`	Childpath

TOUCHRESOURCE Procedure

This procedure changes the modification time of the resource to the current time.

Syntax

DBMS_XDB.DBMS_XDB.TOUCHRESOURCE 
     abspath    IN     VARCHAR2);

Parameters

Table 163-59 DBMS_XDB.TOUCHRESOURCE Procedure Parameters

Parameter	Description
`abspath_path`	Absolute path of the resource

UPDATERESOURCEMETADATA Procedures

This procedure updates metadata for a resource. The procedure takes in a resource identified by absolute path and the metadata in it to replace identified by its REF. It replaces that piece of metadata with user-defined metadata which is either in the form of a REF to XMLTYPE or an XMLTYPE.

Syntax

Can be used to update schema-based metadata only. The new metadata must be schema-based:

DBMS_XDB.UPDATERESOURCEMETADATA(
   abspath  IN VARCHAR2,
   oldmetadata    IN   REF SYS.XMLTYPE,
   newmetadata    IN   REF SYS.XMLTYPE)

Can be used to update schema-based metadata only. The new metadata must be schema-based or nonschema-based:

DBMS_XDB.UPDATERESOURCEMETADATA(
   abspath        IN   VARCHAR2,
   oldmetadata    IN   REF SYS.XMLTYPE,
   newmetadata    IN   XMLTYPE);

Can be used for both schema-based and nonschema-based metadata:

DBMS_XDB.UPDATERESOURCEMETADATA(
   abspath        IN   VARCHAR2,
   oldns          IN   VARCHAR2,
   oldname IN VARCHAR,
   newmetadata IN XMLTYPE);

Can be used for both schema-based or nonschema-based metadata. New metadata must be schema-based:

DBMS_XDB.UPDATERESOURCEMETADATA(
   abspath       IN   VARCHAR2,
   oldns         IN   VARCHAR2,
   oldname       IN   VARCHAR,
   newmetadata   IN   REF SYS.XMLTYPE);

Parameters

Table 163-60 UPDATERESOURCEMETADATA Procedure Parameters

Parameter	Description
`abspath`	Absolute path of the resource
`oldmetadata`	`REF` to the old of metadata
`newmetadata`	`REF` to the new, replacement metadata (can be either schema-based or nonschema-based depending on the overload)
`oldns`	Namespace identifying old metadata
`oldname`	Local name identifying old metadata

Usage Notes

In the case of REF, it stores the REF in the resource and the metadata is stored in a separate table. Uniqueness of REFs is enforced. In the case where the XMLTYPE is passed in, data is parsed to determine if it is schema-based or not and is stored accordingly.

UNLOCKRESOURCE Function

This function unlocks the resource given a lock token and a path to the resource.

Syntax

DBMS_XDB.UNLOCKRESOURCE(
   path     IN  VARCHAR2,
   deltoken IN  VARCHAR2)
 RETURN BOOLEAN;

Parameters

Table 163-61 UNLOCKRESOURCE Function Parameters

Parameter	Description
`path`	Path name to the resource
`deltoken`	Lock token to be removed

Return Values

TRUE if operation successful.

Usage Notes

The user must have UPDATE privileges on the resource.