Skip Headers
Oracle® Database SQL Language Reference
11g Release 1 (11.1)

Part Number B28286-01
Go to Documentation Home
Home
Go to Book List
Book List
Go to Table of Contents
Contents
Go to Index
Index
Go to Master Index
Master Index
Go to Feedback page
Contact Us

Go to previous page
Previous
Go to next page
Next
View PDF

XML Conditions

XML conditions determines whether a specified XML resource can be found in a specified path.

EQUALS_PATH Condition

The EQUALS_PATH condition determines whether a resource in the Oracle XML database can be found in the database at a specified path.

Use this condition in queries to RESOURCE_VIEW and PATH_VIEW. These public views provide a mechanism for SQL access to data stored in the XML database repository. RESOURCE_VIEW contains one row for each resource in the repository, and PATH_VIEW contains one row for each unique path in the repository.

equals_path_condition::=

Description of equals_path_condition.gif follows
Description of the illustration equals_path_condition.gif

This condition applies only to the path as specified. It is similar to but more restrictive than UNDER_PATH.

For pathname, specify the (absolute) path name to resolve. This can contain components that are hard or weak resource links.

The optional correlation_integer argument correlates the EQUALS_PATH condition with its ancillary functions DEPTH and PATH.

Example

The view RESOURCE_VIEW computes the paths (in the any_path column) that lead to all XML resources (in the res column) in the database repository. The following example queries the RESOURCE_VIEW view to find the paths to the resources in the sample schema oe. The EQUALS_PATH condition causes the query to return only the specified path:

SELECT ANY_PATH FROM RESOURCE_VIEW
   WHERE EQUALS_PATH(res, '/sys/schemas/OE/www.oracle.com')=1;

ANY_PATH
-----------------------------------------------
/sys/schemas/OE/www.oracle.com

Compare this example with that for UNDER_PATH Condition.

UNDER_PATH Condition

The UNDER_PATH condition determines whether resources specified in a column can be found under a particular path specified by path_string in the Oracle XML database repository. The path information is computed by the RESOURCE_VIEW view, which you query to use this condition.

Use this condition in queries to RESOURCE_VIEW and PATH_VIEW. These public views provide a mechanism for SQL access to data stored in the XML database repository. RESOURCE_VIEW contains one row for each resource in the repository, and PATH_VIEW contains one row for each unique path in the repository.

under_path_condition::=

Description of under_path_condition.gif follows
Description of the illustration under_path_condition.gif

The optional levels argument indicates the number of levels down from path_string Oracle should search. For levels, specify any nonnegative integer.

The optional correlation_integer argument correlates the UNDER_PATH condition with its ancillary functions PATH and DEPTH.

See Also:

The related condition EQUALS_PATH Condition and the ancillary functions DEPTH and PATH

Example

The view RESOURCE_VIEW computes the paths (in the any_path column) that lead to all XML resources (in the res column) in the database repository. The following example queries the RESOURCE_VIEW view to find the paths to the resources in the sample schema oe. The query returns the path of the XML schema that was created in "XMLType Table Examples":

SELECT ANY_PATH FROM RESOURCE_VIEW
   WHERE UNDER_PATH(res, '/sys/schemas/OE/www.oracle.com')=1;

ANY_PATH
----------------------------------------------
/sys/schemas/OE/www.oracle.com/xwarehouses.xsd