Another nested xmlagg

Question

Hi folks,
I have the following query:
select xmlroot(
     xmlelement
          EMSData,
XMLForest(
v_DailyStartDate as "DailyStartDate",
v_WeeklyStartDate as "WeeklyStartDate",
v_MonthlyStartDate as "MonthlyStartDate"
          XMLAGG
               XMLELEMENT
                    year,
                    xmlattributes(calyear),
                    xmlagg
                         xmlelement
                              interval,
                              xmlattributes(intervalType as "Type",intervalValue as "Value"),
                              xmlelement
                                   data,
                                   xmlattributes(provider),
                                   xmlforest
                                        bytes,
                                        files
                         order by orderBy,intervalvalue desc
               order by calyear desc
     ), version '1.0').getClobVal() into l_xml
from myTable
group by calyear;
Which produces the following XML:
<?xml version="1.0"?>
<EMSDATA>
<DailyStartDate>30-SEP-11</DailyStartDate>
<WeeklyStartDate>01-OCT-08</WeeklyStartDate>
<MonthlyStartDate>01-JAN-02</MonthlyStartDate>
<YEAR CALYEAR="2011">
<INTERVAL Type="DAY" Value="333">
<DATA PROVIDER="ALPHA">
<BYTES>16734642488</BYTES>
<FILES>2333</FILES>
</DATA>
</INTERVAL>
<INTERVAL Type="DAY" Value="333">
<DATA PROVIDER="BETA">
<BYTES>2580914653</BYTES>
<FILES>8148</FILES>
</DATA>
</INTERVAL>
<INTERVAL Type="DAY" Value="332">
<DATA PROVIDER="ALPHA">
<BYTES>24516086977</BYTES>
<FILES>2315</FILES>
</DATA>
</INTERVAL>
<INTERVAL Type="DAY" Value="332">
<DATA PROVIDER="BETA">
<BYTES>1090547502078</BYTES>
<FILES>16548</FILES>
</DATA>
</INTERVAL>
</YEAR>
</EMSDATA>
What I really want the XML to look like is:
<?xml version="1.0"?>
<EMSDATA>
<DailyStartDate>30-SEP-11</DailyStartDate>
<WeeklyStartDate>01-OCT-08</WeeklyStartDate>
<MonthlyStartDate>01-JAN-02</MonthlyStartDate>
<YEAR CALYEAR="2011">
<INTERVAL Type="DAY" Value="333">
<DATA PROVIDER="ALPHA">
<BYTES>16734642488</BYTES>
<FILES>2333</FILES>
</DATA>
<DATA PROVIDER="BETA">
<BYTES>2580914653</BYTES>
<FILES>8148</FILES>
</DATA>
</INTERVAL>
<INTERVAL Type="DAY" Value="332">
<DATA PROVIDER="ALPHA">
<BYTES>24516086977</BYTES>
<FILES>2315</FILES>
</DATA>
<DATA PROVIDER="BETA">
<BYTES>1090547502078</BYTES>
<FILES>16548</FILES>
</DATA>
</INTERVAL>
</YEAR>
</EMSDATA>
I know it is something simple but I'm brain fried.
Please advise.
Best,
Nat

Answer 1

I'm thinking I need a nested select statement such as:
select xmlroot
     xmlelement
          EMSData,
          XMLForest
               v_DailyStartDate as "DailyStartDate",
               v_WeeklyStartDate as "WeeklyStartDate",
               v_MonthlyStartDate as "MonthlyStartDate"
          XMLAGG
               XMLELEMENT
                    year,
                    xmlattributes(calyear),
                         select
                         xmlagg
                              xmlelement
                                   interval,
                                   xmlattributes(intervalType as "Type",intervalValue as "Value"),
                                   xmlelement
                                        data,xmlattributes(provider),
                                        xmlelement
                                             "BYTES", bytes
                                        xmlelement
                                             "FILES",files
                         ) from mytable
               order by calyear desc
     version '1.0'
).getClobVal() into l_xml
from mytable
group by calyear;
However, when I try this Oracle just sits there. So, I decided to just try the nested sql itself to see the results. I ran the following:
declare
l_xml clob;
myFilename varchar2(50) := 'myTestXML';
v_ctx DBMS_XMLGen.ctxHandle;
xmldoc dbms_xmldom.DOMDocument;
begin
select
xmlroot(
                         xmlagg
                              xmlelement
                                   interval,
                                   xmlattributes(intervalType as "Type",intervalValue as "Value"),
                                   xmlelement
                                        data,xmlattributes(provider),
                                        xmlforest
                                             bytes,
                                             files
     version '1.0'
).getClobVal() into l_xml
from mytable;
xmldoc := dbms_xmldom.newDOMDocument(l_xml);
dbms_xmldom.writeToFile(xmldoc, 'ERR_DIR'||'/'||myFilename||'.xml');
dbms_xmldom.freeDocument(xmldoc);
end;
I get this error:
ERROR at line 1:
ORA-31011: XML parsing failed
ORA-19202: Error occurred in XML processing
LPX-00245: extra data after end of document
Error at line 8
ORA-06512: at "XDB.DBMS_XMLDOM", line 5345
ORA-06512: at "XDB.DBMS_XMLDOM", line 5370
ORA-06512: at "XDB.DBMS_XMLDOM", line 5290
ORA-06512: at line 42
Can anyone offer insight as to what I'm doing wrong.
Best,
Nat
Edited by: 899806 on Dec 1, 2011 9:15 AM
Edited by: 899806 on Dec 1, 2011 1:45 PM