'sort key too long error' while trying to use dynamic sql

Question

Hi All,
I have been trying to generate an interactive report using a dynamically generated SQL query.. for this I have
1) Created a application process that returns the dynamically generated SELECT statement
2) Create a process in the page which creates a collection based on the SELECT statement returned by the application process
3) An interactive report that selects ALL (SELECT * ....) from that particular collection.
On implementing I am getting the 'ORA-01467: sort key too long' error.
On checking this out online I realized that one has to change the Block size of the database to get past this error, but in order to do that I would have to re-create the database, create a backup of the data and then re enter them into the new database which would be a nightmare.
I would like to know if there is any work around to this....
CODE IN THE APPLICATION PROCESS
DECLARE
q VARCHAR2(1000);
BEGIN
IF :P124_COUNTRY - :P124_WORK_GROUP - :P124_PRODUCT - :P124_ROLE = 1 THEN
q:= 'SELECT VISA_COUNTRY AS "Country", ROUND(((COUNT(VISA_ID)/(SELECT COUNT(ROW_ID) FROM PSA_RESOURCE_MANAGER WHERE ACTIVE_FLAG = ''Y''))*100),2) || ''%'' AS "Travel Readiness %" FROM PSA_VISA_INFO WHERE ACTIVE_FLAG = ''Y'' AND VISA_ACTIVE_FLAG = ''Y'' GROUP BY VISA_COUNTRY';
END IF;
return q;
END;
CODE IN THE PROCESS THAT CREATES THE COLLECTION:
APEX_COLLECTION.CREATE_COLLECTION_FROM_QUERY_B(
p_collection_name => 'TRAVRED_TEST',
p_query => 'application_process=set_query' );
CODE IN THE INTERACTIVE REPORT:
Select *
From apex_collections
Where collection_name = 'TRAVRED_TEST';
I also tried selecting just 'c001, c002' etc which gave me a 'no data found' output. The query work fine when I ran it in the SQL Workshop
Please help!
Thanks in advance :)

Answer 1

Hey Ben,
I am getting the same error when I used the following code in the app process....
DECLARE
q VARCHAR2(32767);
BEGIN
IF :P124_COUNTRY - :P124_WORK_GROUP - :P124_PRODUCT - :P124_ROLE = 1 THEN
q:= 'SELECT visa_country,
COUNT(visa_id) visa_count
FROM psa_visa_info
WHERE active_flag = 'Y'
AND visa_active_flag = 'Y'
GROUP BY visa_country),
row_id_count AS
(SELECT /*+ MATERIALIZE */
COUNT(ROW_ID) row_count
FROM PSA_RESOURCE_MANAGER
WHERE ACTIVE_FLAG = 'Y')
SELECT visa_country,
ROUND(visa_count/(SELECT row_count FROM row_id_count)*100,2) travel_readiness FROM PSA_VISA_INFO WHERE ACTIVE_FLAG = ''Y'' AND VISA_ACTIVE_FLAG = ''Y'' GROUP BY VISA_COUNTRY';
END IF;
return q;
END;
Thanks