Error: Sequence does not match type xs:string

Question

I am using BDB XML 2.5.16 to store and query my XML  documents in Java. The documents are IMDB xml documents containing actors information
obtained from INEX website https://inex.mmci.uni-saarland.de/login.jsp.  One of  the document I stored in the database is the following
    <?xml version="1.0" encoding="UTF-8"?>
     <persons>
      <person>
          <name>jason angeles
          </name>
          <filmography>
             <act>
                <movie>
                   <title>prison planet 3 the revenge 1998
                    </title>
                  <year>1998
                  </year>
                 <character>evil ninja
                  </character>
               </movie>
             </act>
          </filmography>
         </person>
         </persons>
I want to  search using XQuery  for filmography element whose title element contains ANY of the following keywords ('planet', 'revenge', '1998'). Below is the query I used
              // declaring function functx:contains-any-of
            String qryRk = "declare namespace functx = 'http://www.functx.com'; " 
                  + "declare function functx:contains-any-of "
                 + "( $arg as xs:string?" + " , "  + " $searchStrings as xs:string* )  as xs:boolean { "
                 + "some $searchString in $searchStrings "
                +  " satisfies contains($arg,$searchString)} ; ";
             String myQuery101 = qryRk + "for $entity in collection('simpleExampleData2.dbxml')//filmography "
                  + "where functx:contains-any-of ( $entity/act/movie/title ,  ('planet', 'revenge', '1998'))"
                  + "return $entity";
When I  execute the query  i  expect to get at least get the following element as mu output
                       Document : person_31000.xml:
                    <filmography>
                           <act>
                                 <movie>
                                 <title>prison planet 3 the revenge 1998
                                </title>
                                <year>1998
                                </year>
                               <character>evil ninja
                               </character>
                              </movie>
                           </act>
                         </filmography>
However instead of the above element i got the  following Error
                             Exception in thread "main" com.sleepycat.dbxml.XmlException: Error: Sequence does not match type xs:string? - the sequence contains more than one item [err:XPTY0004], <query>:1:343, errcode =               
                              QUERY_EVALUATION_ERROR
                                  at com.sleepycat.dbxml.dbxml_javaJNI.XmlManager_query__SWIG_0(Native Method)
                                  at com.sleepycat.dbxml.XmlManager.query(XmlManager.java:544)
                                 at com.sleepycat.dbxml.XmlManager.query(XmlManager.java:320)
                                 at xmlirsystemstruxplus.XQueryEngine.queryEngine(XQueryEngine.java:269)
                                 at xmlirsystemstruxplus.XMLIRSystemStruXplus.main(XMLIRSystemStruXplus.java:109)
                                 Java Result: 1
    Note that i used  contains-any-of() function because the contains () function does not work with  'planet revenge 1998' string may be because the keywords do not appear in the order they appear in the element content.
   Please  can any body help me to find out  (1) why i have the  above error ? and solution  (2)  why  the condition contains  ( $entity/act/movie/title ,  'planet revenge 1998') is not working ? how do i use contains() function w.r.t this
Thank you in advance
Message was edited by: RokoA 19/01/2015  by RokoA

Answer 1

Using the shell dbxml in both 2.5 and 6.0 I created a container and put the document example you gave into it.  Then I executed the following query:
[code]
declare namespace functx = 'http://www.functx.com';
declare function functx:contains-any-of ( $arg as xs:string?, $searchStrings as xs:string* )  as xs:boolean {
some $searchString in $searchStrings
satisfies contains($arg,$searchString)
for $entity in collection('simpleExampleData2.dbxml')//filmography
where functx:contains-any-of ( $entity/act/movie/title ,  ('planet', 'revenge', '1998'))
return $entity
[/code]
And got the results you expected instead of an error.
Since you are using the Java API it is possible the problem is in how you configured and executed the query, instead of in the query itself.  If you could post an example program or code section that produces the error, then I can continue you help you with this.
Lauren Foutz