This chapter describes the custom Oracle XQuery functions available with Oracle Service Bus.
The Oracle XQuery engine fully supports all of the language features that are described in the World Wide Web (W3C) specification for XQuery with one exception: modules. For more information about the XQuery 1.0 and XPath 2.0 functions and operators (W3C Working Draft 23 July 2004), see the following URL:
http://www.w3.org/TR/2004/WD-xpath-functions-20040723/
Oracle Service Bus supports the following XQuery functions:
Thank you for big list of XQuery functions and name spaces for OSB.the fn:position() as xs:integer helps me.you mention the source for these function to know more. Regards, oracle service bus training. 43 XQuery Implementation. Oracle Service Bus supports the following XQuery functions: A robust subset of the XQuery functions that are described in W3C specification. Oracle function extensions and language keywords provided as part of the Oracle XQuery engine—with a small number of exceptions, as described in Section 43.1.
- A robust subset of the XQuery functions that are described in W3C specification. Adobe pdf converter free for mac.
- Oracle function extensions and language keywords provided as part of the Oracle XQuery engine—with a small number of exceptions, as described in Section 43.1, 'Supported Function Extensions from Oracle.'
- Oracle Service Bus-specific function extensions. See Section 43.2, 'Function Extensions from Oracle Service Bus.'Note:All of the Oracle function extensions use the following function prefix
fn-bea:
In other words, the full XQuery notation for an extended function is of this format:
43.1 Supported Function Extensions from Oracle
For descriptions of all Oracle function extensions, see 'XQuery Implementation' in the XQuery and XQSE Developer's Guide at
https://download.oracle.com/docs/cd/E13162_01/odsi/docs10gr3/xquery/extensions.html
.Oracle Service Bus supports all Oracle function extensions to XQuery except for the following:
- fn-bea:is-access-allowed
- fn-bea:is-user-in-group
- fn-bea:is-user-in-role
- fn-bea:userid
- fn-bea:async
- fn-bea:timeout
- fn-bea:get-property
- fn-bea:execute-sql()
Oracle recommends that you do not use the following functions in Oracle Service Bus. They are better covered by other language features:
- fn-bea:if-then-else
- fn-bea:QName-from-string
- fn-bea:sql-like
43.2 Function Extensions from Oracle Service Bus
Oracle Service Bus provides the following XQuery functions:
43.2.1 fn-bea:lookupBasicCredentials
The
fn-bea:lookupBasicCredentials
function returns the user name and unencrypted password from a specified service account. You can specify any type of service account (static, pass-through, or user-mapping). See Chapter 17, 'Service Accounts.'Use the
fn-bea:lookupBasicCredentials
function as part of a larger set of XQuery functions that you use to encode a user name and password in a custom transport header or in an application-specific location within the SOAP envelope. You do not need to use this function if you only need user names and passwords to be located in HTTP Authentication headers or as WS-Security user name tokens. Oracle Service Bus already retrieves user names and passwords from service accounts and encodes them in HTTP Authentication headers or as WS-Security user name tokens when required.The function has the following signature:
Gta vice city pc game save file. where
$service-account
is the path and name of a service account in the following form:The return value is an XML element of this form:
You can store the returned element in a user-defined variable and retrieve the user name and password values from this variable when you need them.
For example, your Oracle Service Bus project is named
myProject
. You create a static service account named myServiceAccount
in a folder named myFolder1/myFolder2
. In the service account, you save the user name of pat
with a password of patspassword
.To get the user name and password from your service account, invoke the following function:
https://entrancementways166.weebly.com/best-action-games-for-android-phones-free-download.html. The function returns the following element:
43.2.2 fn-bea:isUserInGroup
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Returns whether or not a given user belongs to a given group (true or false). For example:
43.2.3 fn-bea:isUserInRole
Returns whether or not a given user belongs to a given role (true or false). For example:
43.2.4 fn-bea: uuid
The function
fn-bea:uuid
returns a universally unique identifier. The function has the following signature:You can use this function in the proxy pipeline to generate a unique identifier. You can insert the generated unique identifier into an XML document as an element. You cannot generate a unique identifier to the system variable. You can use this to modify a message payload.
For example, suppose you want to generate a unique identifier to add to a message for tracking purposes. You could use this function to generate a unique identifier. The function returns a string that you can add it to the SOAP header.
43.2.5 fn-bea:execute-sql()
The
fn-bea:execute-sql()
function provides low-level database access from XQuery within Oracle Service Bus message flows--see Section 37.9, 'Accessing Databases Using XQuery.' The query returns a sequence of flat row elements with typed data.The function has the following signature:
where
$datasource
is the JNDI name of the datasource- https://morsope.hatenablog.com/entry/2020/11/23/224158.
$rowElemName
is the name of the row element—specify$rowElemName
as whatever QName you want each element of the resulting element sequence to have $sql
is the SQL statement$param1, ., $paramk
are 1 to k parameterselement()*
represents the sequence of elements returned
The return value is a sequence of flat row elements with typed data and automatically translates values between SQL/JDBC and XQuery data models. Data Type mappings that the XQuery engine generates or supports for the supported databases can be found in the Appendix H, 'XQuery-SQL Mapping Reference.'
When you execute the
fn-bea:execute-sql()
function from an Oracle Service Bus message flow, you can store the returned element in a user-defined variable.Use the following examples to understand the use of the
fn-bea:execute sql()
function in Oracle Service Bus:43.2.5.1 Example 1: Retrieving the URI from a Database for Dynamic Routing
Oracle Service Bus proxy services support specification of the URI to which messages are to be routed at run time (dynamically)—see Section 37.8, 'Using Dynamic Routing.'Example 43-1 is an example use of the
fn-bea:execute-sql()
function to retrieve the URI from a database in a dynamic routing scenario.Example 43-1 Get the URI for a Business Service from a Database
In Example 43-1:
ds.myJDBCDataSource
is the JNDI name to the data sourcexs:string($body/m:Request/m:customer_pri/text())
interrogates the request message and populatescustomer_priority=?
with the value ofcustomer_pri
in the message- Google play for my laptop downloading apps to my phone.
/TARGETSERVICE/text()
is the path applied to the result of the SQL statement, which results in the string (CDATA) contents of that element being returned <ctx:route><ctx:service> . </ctx:service></ctx:route>
are required elements of the XQuery statement for a dynamic routing scenario- The following is the table definition for
DISPATCH_MAPPING
:
The
DISPATCH_MAPPING
table is populated as shown in Example 43-2:Note:
The third column in the table (
soapPayload
) is not used in this scenario.Executing the fn-bea:execute-sql for Example 3
If the XQuery in Example 43-1 is executed as a result of a proxy service receiving the request message in Example 43-3 (note that the value of
<customer_pri>
in the request message is 0001)
, the URI returned for the dynamic route scenario isSerialize Function In Php
(See also Example 43-2.)
43.2.5.2 Example 2: Getting XMLType Data from a Database
Data Type mappings that the XQuery engine generates or supports for the supported databases can be found in the Appendix H, 'XQuery-SQL Mapping Reference.' Note that the
XMLType
column type in SQL is not supported. However, you can access the data in an XMLType
column by using the getStringVal()
method of the XMLType
object to convert it to a String value.The following scenario outlines a procedure you can use to select data from an
XMLType
column in an Oracle database.- Use an assign action in a proxy service message flow to assign the results of the following XQuery to a variable (
$result
).Example 43-4 Get XMLType Data from a Databasewhere:ds.myJDBCDataSource
is the JNDI name to the data sourceRec
is the$rowElemName
—therefore, Rec is the QName given to each element of the resulting element sequenceselect a.purchase_order.getStringVal() .
is the SQL statement that uses thegetStringVal()
method of theXMLType
object to convert it to a String value Fayetteville technical community college nursing program.datatypes
is the table from which the value of the XML is read (thedatatypes
table in this case contains one row)Note:The following is the table definition for thedataty.pes
table:
- Use a replace action to replace the node contents of
$body
with the results of thefn-bea:execute-sql()
query (assigned to$result
in the preceding step):The following listing shows$body
after the replacement.Note:Thedatatypes
table contains one row (with the purchase order data); the row contains the XML represented in Example 43-5.
Example 43-5 $body After XML Content is Replaced with Result of fn-bea:execute-sql()
![Serialize Serialize](/uploads/1/3/3/2/133283589/438544793.png)
43.2.6 fn-bea:serialize()
You can use the
fn-bea:serialize()
function if you need to represent an XML document as a string instead of as an XML element. Hiren s bootcd 11. For example, you may want to exchange an XML document through an EJB interface and the EJB method takes String as argument. The function has the following signature:43.3 Creating and Using Custom XPath Functions
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You can create and use your own custom XPath functions in both inline XQuery expressions and in XQuery resources. For more information, see 'Creating and Using Custom XPath Functions' in the Oracle Fusion Middleware Developer's Guide for Oracle Service Bus.