Create a RDF view model with R2RML on a CLOB column

jhidding

    I want to create a RDF view model on a table with a database column GEOWKT_LATLONG. This column is of type CLOB.

    I use the prefix

    @prefix orageo: <http://xmlns.oracle.com/rdf/geo/> .

    @prefix rr: <http://www.w3.org/ns/r2rml#>.

     

    and the mapping is

    rr:predicateObjectMap [

            rr:predicate geosparql:hasGeometry;

            rr:objectMap [ rr:column "GEOWKT_LATLONG"; rr:datatype orageo:WKTLiteral ]

    ]

     

    when I run the statement "sem_apis.create_rdfview_model", I get the following error message:

    Error report -

    ORA-13199: Incompatible types:

    Database Column (GEOWKT_LATLONG) typecode = 112 ((UNSUPPORTED DBMS_TYPES TYPECODE: 112)(0,0))

    R2RML mapping specified type = <http://xmlns.oracle.com/rdf/geo/WKTLiteral>

    ideal RDF datatype: UNKNOWN

    [

    ORA-06512: in "MDSYS.SDO_RDF_INTERNAL", regel 13806

     

     

    ]

    ORA-06512: in "MDSYS.SDO_RDF", regel 3776

    ORA-06512: in "MDSYS.SDO_RDF", regel 3849

    ORA-06512: in "MDSYS.RDF_APIS", regel 1276

    ORA-06512: in regel 2

    13199. 00000 -  "%s"

    *Cause:    This is an internal error.

    *Action:   Contact Oracle Support Services.

     

    Is there someone to help me to solve this problem.