Call a procedure in a function to create an Index

Question

Hi,
i want to doing a text search and have to create some index
to doing that. I have to choose between create two index according to
what a search i want to doing.
The function, which call the sql-statement to search the text is:
CREATE OR REPLACE FUNCTION SEARCHTEXT(textToSearch IN VARCHAR2)
RETURN utilities.resultset_ft PIPELINED AS
BEGIN
BEGIN
INDEXTEST;
END;
DBMS_OUTPUT.PUT_LINE('get the data');
-- search the Text in the database Documents
FOR i in
(SELECT extract(Document, '/*/*/*/*/location[1]/uri/text()').getStringVal() as location, score(1) as score_nbr
FROM Mydocuments
WHERE contains(Document, textTosearch, 1) > 0
ORDER BY score_nbr)
LOOP
PIPE ROW(i);
END LOOP;
RETURN;
END ;
This function call the procedure "INDEXTEST", which create the index.
CREATE OR REPLACE PROCEDURE INDEXTEST
AS
BEGIN
EXECUTE IMMEDIATE 'CREATE INDEX FTS_INDEX ON Mydocuments (DOCUMENT)' || ' ' ||
'INDEXTYPE IS CTXSYS.CONTEXT' || ' ' ||
'PARAMETERS (''' || 'stoplist Doc_stoplist' || ' ' ||
'section group CTXSYS.PATH_SECTION_GROUP'')';
EXCEPTION
WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE(sqlerrm);
END INDEXTEST;
I call the statement:
select *
from TABLE(searchtext('%Let%'))
and i get this error:
Error starting at line 1 in command:
select *
from TABLE(searchtext('%Let%'))
Error report:
SQL Error: ORA-14552: DDL-, Commit- oder Rollback-Vorgang kann innerhalb einer Abfrage oder DML nicht durchgeführt werden
ORA-06512: in "INDEXTEST", Zeile 5
ORA-06512: in "SEARCHTEXT", Zeile 15
14552. 00000 - "cannot perform a DDL, commit or rollback inside a query or DML "
Cause:    DDL operations like creation tables, views etc. and transaction<br /><br />control statements such as commit/rollback cannot be performed<br /><br />inside a query or a DML statement.<br /><br />Action: Ensure that the offending operation is not performed or
use autonomous transactions to perform the operation within
the query/DML operation.
<p>
Can someone help me?
</p>
Thanks for help

Answer 1

So, in answer to your question, how to do this....
Create the necessary indexes before you issue the query to do the search.
Yes, that means you need to have some intermediate steps to do it, but you should be able to control that from your application level.
e.g.
1. User enters search criteria
2. Application processes criteria and creates necessary indexes
3. Application queries the results
4. Application drops the indexes.
Or, alternatively, it may be an idea to have a look at your overall design and solve the issue why you are actually having to try and create indexes on the fly. If the database structure was correct in the first place then you shouldn't have to create any more indexes than the permanent ones you will have already determined.