Question

I am trying to retrieve CLOB data from our Oracle database. the code is the following:

<cfstoredproc datasource="#request.site.datasource#" procedure="GETPAGESWITHMETADATA" result="myResults">
    <cfprocparam cfsqltype="CF_SQL_VARCHAR" type="in" value="News">
    <cfprocparam cfsqltype="CF_SQL_VARCHAR" type="in" value="News Pages">
    <cfprocparam cfsqltype="CF_SQL_CLOB" type="out" variable="XML">
    <cfprocresult name="rs1">
</cfstoredproc>
<cfdump var="#myResults#">
<cfoutput>#XML#</cfoutput>
<cfcatch type="any">
    <cfdump var="#cfcatch#">
</cfcatch>
</cftry>

Basically, the output of the stored procedure is:

select dbms_xmlquery.getxml(queryCtx) INTO XML from dual;

I checked the data sources on the server and the “Enable long text retrieval (CLOB).” option is checked for every data source.

Surprisingly, instead of getting the XML result on screen, I get a very short string:
[C@74897f5e

It looks like a handle id instead of the content itself.

How can I retrieve the complete content of the XML?

For reference, the data source is using macromedia drivers with TNS name:
Driver class: macromedia.jdbc.MacromediaDriver

Answer 1

As @MarkAKruger suggested, returning a table from the procedure solved the issue.
The following PL/SQL code did the trick:

create or replace
PACKAGE PCK_Commonspot
AS
type t_clob IS record (metadata CLOB) ;
type t_clob_tab IS TABLE OF t_clob;
FUNCTION GetPagesWithMetadataAsRS(FormName varchar2, CategoryName varchar2)
    RETURN t_clob_tab pipelined;
END PCK_Commonspot;

The package body contains the following code:

FUNCTION GetPagesWithMetadataAsRS(FormName varchar2, CategoryName varchar2)
    RETURN t_clob_tab pipelined
IS
    r t_clob;
 BEGIN
    GETPAGESWITHMETADATA(FormName, CategoryName, r.metadata) ;
    pipe row(r) ;
    RETURN;
END;

The function GETPAGESWITHMETADATA is the one returning a CLOB into r.metadata
Here, the trick is around returning a piped table.

It becomes super nice on the ColdFusion side because the call is really simple:

<cfquery name="Test" datasource="myDS" maxrows="1">
    SELECT * FROM TABLE(PCK_Commonspot.GetPagesWithMetadataAsRS('abc','def'))
</cfquery>
<cfset XML = Xmlparse(Test.Metadata)>

Thanks Mark!