Numeric or value error on converting clob to SMLType

Question

Hi,
What I am trying to do is
i.) pass an xml string value to the variable in Oracle query
ii.) use that xml as part of a join in query and retrieve results.
Approach:
Input variable type is CLOB and then performing the query written below :
declare
testxml clob;
begin
textxml := '<table1><root><no>1</no></root><root><no>2</no></root></table1>'
open :csr for
select tt.no
from (
select xmltype.extract (value(a), '/root/no/text()').getstringval() as no
from table (xmlsequence (sys.xmltype(:testxml).Extract('/table1/root'))) a
) tt
group by tt.no ;
end;
Problem:
The query as written above throws me an error numeric or value error at sys.xmltype (ORA 06502 & ORA 06512). But if I declare the testxml as varchar2; it works fine. Searched quite a bit but to no avail.
Any ideas please!!
Other info: Oracle 10g, Tool: PL/SQL Developer (Allround Automations).
3 days on Oracle; 7 years on SQL Server.. :) {so please be a bit elaborate}
The code spacing doesn't work :( How do we put code tags in this forum?
Edited by: rajeev.ranjan on May 11, 2009 7:43 AM

Answer 1

As for what your actual problem is, I don't know. Once I had fixed all the typos in the code you posted it ran as expected.
SQL> r
  1  declare
  2      testxml clob;
  3  begin
  4      testxml := '<table1><root><no>1</no></root><root><no>2</no></root></table1>';
  5      open :csr for
  6          select tt.no
  7          from (
  8              select xmltype.extract (value(a), '/root/no/text()').getstringval() as no
  9              from table (xmlsequence (sys.xmltype(testxml).Extract('/table1/root'))) a
10              ) tt
11      group by tt.no ;
12* end;
PL/SQL procedure successfully completed.
SQL> print csr
NO
1
2
SQL>Cheers, APC
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