Re: weird behaviour xml query

Question

From the XML DB FAQ (#5 in the announcement list)
How to I use namespaces with XMLQuery() ?
How do I declare namespace prefix mapping with XMLTable() ?
Your XML has a default namespace associated with it, so you will need to supply the default namespace to XMLTable/XQuery as well.  Also the XPaths in the COLUMNS clause are relative to the XPath for the XMLTable itself, so I adjusted that as well. The below returns rows, but I did not verify it is what you desired.  This should give you a start at least.
select a.*, b.*
   from cas_nummers,  -- changed
        xmltable
                 XMLNamespaces(default 'http://echa.europa.eu/schemas/ecInventory'),  -- added
                 '/ECSubstanceInventory/ecSubstances/ECSubstance'
                 passing cas_nummers.object_value  -- changed
                 columns
                 creationDate varchar2(30) path '@creationDate',
                 status varchar2(20) path '@status',
                 ecnumber  varchar2(20) path 'ecNumber',  -- changed
                 casnumber varchar2(20) path 'casNumber',  -- changed
                 molecularFormula varchar2(20) path 'molecularFormula',  -- changed
                 namelist xmltype path 'ecNames'  -- changed
        ) a,
        xmltable
                 XMLNamespaces(default 'http://echa.europa.eu/schemas/ecInventory'),  -- added
                 'ecNames'  -- changed
                 passing a.namelist
                 columns
                 ecName      varchar2(5) path '.'  -- changed
        ) b

Answer 1

I have replace the file test1.xml with a file of about 28MB with about 100000 records(say casNumbers)
I have created a table with the columns
casnumber,ecnumber, molecularformula, cname, status,creationdate
I use the following plsql anohymous block
declare
cursor c0
is
select to_date(substr(a.creationdate,1,10),'yyyy-mm-dd') as creationdate
     , decode(a.status,'active',1,0) as status
     , a.ecnumber
     , a.casnumber
     , a.molecularformula
     , b.ecName
   from cas_nummers,
        xmltable 
                 XMLNamespaces(default 'http://echa.europa.eu/schemas/ecInventory'),
                 '/ECSubstanceInventory/ecSubstances/ECSubstance' 
                 passing cas_nummers.object_value 
                 columns 
                 creationDate varchar2(30) path '@creationDate', 
                 status varchar2(20) path '@status', 
                 ecnumber  varchar2(20) path 'ecNumber', 
                 casnumber varchar2(20) path 'casNumber', 
                 molecularFormula varchar2(20) path 'molecularFormula', 
                 namelist xmltype path 'ecNames' 
        ) a, 
        xmltable 
                 XMLNamespaces(default 'http://echa.europa.eu/schemas/ecInventory'),  -- added 
                 'ecNames'  -- changed 
                 passing a.namelist 
                 columns 
                 ecname      varchar2(50) path '.'  -- changed 
        ) b
v_errm varchar2(200);
i pls_integer;
begin
   for r_casnr in c0 loop
   begin
      insert into csa_cas_nummers
      ( casnummer_id
      , cas_nummer
      , ec_nummer 
      , stofnaam
      , moleculair_formule
      , dd_creatie
      , status  
      , volgnr
      values
      (csa_cas_nummers_seq.nextval
      ,r_casnr.casnumber
      ,r_casnr.ecnumber
      , trim(r_casnr.stofnaam)
      , r_casnr.molecularformula
      , r_casnr.creationdate
      , r_casnr.status  
      , 0
    if mod(i,1000) = 0 then
       commit;
    end if;
    exception
       when others then
          v_errm :=substr(sqlerrm,1,200);
          insert into foute_casnrs
          values
          (r_casnr.casnumber, v_errm);
          dbms_output.put_line( r_casnr.casnumber||' -> '||sqlerrm);       
   end;
   end loop;
end;
The strange thing is that it stops without error at +/- 38000 records (when i do select count(1) from cas_nummers and no records in the table foute_casnrs)
I have check some cas_nummers which is in the xml file but not in the tcas_nummers table....
Any idea what is wrong with my code?
Thanks in advance,
Henk