Xquery function in pl sql

Question

Hi all.
Is some body know can XQuery functions be used/declared in pl sql? More deep, can I cover XQuery function by pl sql function or procedure? And how to input parameters/variables to Xquery function from pl sql?
Any links to manual will be helpful.
Best regards,
Anton.

Answer 1

Something like that?:
SQL> create or replace procedure index_scan (index_name varchar2, name varchar2)
as
   xml   xmltype;
begin
   select xmlquery (
if ("article-by-title" = $index_name) then doc("/wiki")/root/page[title=$name]
else if ("article-by-id" = $index_name) then doc("/wiki")/root/page[id=$name]
else if ("link-by-target" = $index_name) then doc("/wiki")/root/page/links/link[@target = $name]
else if ("article-by-cat" = $index_name) then doc("/wiki")/root/page/catlinks/catlink[@target=$name]
else error(fn:QName("http://www.w3.org/2005/xqt-errors",  $index_name) , "Some error occured") '
             passing index_name as "index_name", name as "name"
             returning content)
     into xml
     from dual;
end index_scan;
Procedure created.
SQL> exec index_scan('My Index Name','My Name')
BEGIN index_scan('My Index Name','My Name'); END;
Error at line 20
ORA-19112: error raised during evaluation: :My Index Name
Detail: Some error occured
ORA-06512: at "MICHAEL.INDEX_SCAN", line 5
ORA-06512: at line 1Don't have your resources - therefore the error!