Using dbms_frequent_itemset in an Iteractive Report

Question

Hi
I've got an SQL query that uses the package dbms_frequent_itemset that runs fine inside SQL*PLUS
SELECT CAST(itemset AS fi_varchar_t) itemset, support, length, total_tranx
FROM TABLE(dbms_frequent_itemset.fi_transactional(
CURSOR(SELECT OLH.ORPL_OR_ID,
              CAST(I.DESCR AS VARCHAR2(30))
       FROM ORDER_HIS OH,
            ORDER_LINE_HIS OLH,    
            ITEMS I
       WHERE OH.ID = OLH.ORPL_OR_ID    
       AND   OH.STATUS_REF_CODE = 'DESPATCHED'
       AND   OLH.ITC_IT_CODE = I.CODE),
0.05,   -- support_threshhold  (%)
2,     -- itemset_length_min  (Items)
5,     -- itemset_length_max  (Items)
NULL,  -- including Items (default null = all) 
NULL)  -- excluding Items (default null = all)
However if I use the same query for an Interactive Report (Edit Region) and I click 'Apply Changes' I get the error message
Error processing condition.
ORA-00902: invalid datatype
Does anyone know how I can overcome this error?

Answer 1

APEX doesn't handle Nested Tables
(CAST(itemset AS fi_varchar_t) itemset)
You'll have to convert it to something APEX can handle.  (eg a CLOB that holds HTML code)
The solution should be similarly related to displaying the results of a PIVOT XML.
fac586's solution translates the XMLType into a CLOB that holds HTML code.  Since the data type is XMLType, he can use XMLTransform to ease the translation.
Matrix report
You'll have to do the same using whatever methods you know how.
MK