Cannot perform DDL DML inside a query

Question

Hi,
I am using Tom Kyte's in_list function to create a select list inside a select query in one of the reports in my application, given as follows:
SELECT col1, col2,...htmldb_item.select_list_from_query(1,NULL,
'(SELECT column_value d,column_value r FROM the((SELECT CAST
(mypackage.in_list(''||colon_delimited_list||'') AS
myTableType) FROM dual) ))' )...FROM A, B WHERE ...
But the following error appears:
report error:
ORA-14552: cannot perform a DDL, commit or rollback inside a query or DML
ORA-06512: at "FLOWS_020200.WWV_FLOW", line 7002
ORA-06512: at "FLOWS_020200.WWV_FLOW_UTILITIES", line 113
ORA-06550: line 1, column 45:
PLS-00103: Encountered the symbol "(" when expecting one of the following:
begin case declare exit for goto if loop mod null pragma
raise return select update while with
If I replace the query passed to function select_list_from_query, with some simple dummy query, then it works fine.
Please tell me is there any limitation of its use as this case?
What may be the possible best solution?
Regards,
Amir Aman

Answer 1

I have tried Scott's parenthesis solution first.
It is working but with making an additional change, i.e., passing '||''''||colon_delimited_list||''''||' instead just ''||colon_delimited_list||''.
Denes, I have also seen your examples, really a helpful resource.
Thank you very much!
Amir Aman