Need to remove the tags file Nullable while generating XML files

Hello.

I have a requirement where I have to generate an XML file, but the generated XML file does not display the tags when the column is null. An example below:

CREATE TABLE emp_tab (emp_id NUMBER PRIMARY KEY
name VARCHAR2 (20).
dept_id NUMBER);
Table created.
INSERT INTO emp_tab VALUES (30, 'Scott', NULL);
1 line of creation.
INSERT INTO emp_tab VALUES (31, 'Mary', NULL);
1 line of creation.
INSERT INTO emp_tab VALUES (40, 'John', NULL);
1 line of creation.
COMMIT;

When I generate the XML code, you can find the output like below:
< EMPLOYEE >
< EMP_ID > 30 < / EMP_ID >
Scott < NAME > < / NAME >
< / EMPLOYEE >

I just the Worklfow Developer's Guide and the example above was taken from Page 561 and 562 by looking at the DBMS_XMLGEN.setNullHandling using DBMS_XMLGEN procedure. DROP_NULLS as a parameter.

Now, I understand the concept, but my requirement is a little different. I get a record as my procedure parameter PLSQL type, but requires the choice of a base table, which means maybe I have to insert first the folder I get as parameter in a table of basic and then select in the same when you set the context, which is what I don't want in the DBMS_XMLGEN.newContext. This is an additional burden.

I've previously planned to use XMLELEMENT and XMLFOREST to generate the XML file (and was rather more simple), but this requirement to remove the tags altogether when the values are NULL led me to believe that maybe I might have to go down the path of using the API DBMS_XMLGEN.

Can you suggest a better way, replacement to achieve what I want? Or perhaps give an example on how I can get there using XMLDB?

Thank you and best regards,
JD

Can I use just the XMLElement and XMLForest to achieve?

Sure. As said, XMLForest does not create elements for NULL values:

http://docs.Oracle.com/CD/E11882_01/AppDev.112/e23094/xdb13gen.htm#ADXDB5006

If the expression value is null, then no element is created for this expression.

This is the code I wrote your above mentioned suggestion discussion forum

Yes, but this solution is taken out of context.
Here, it is obviously preferable to not generate empty items in the first place:

SELECT XMLElement("Address"
       , XMLForest(
           lr_addr_rec.account_name     as "AccountName"
         , lr_addr_rec.address_line_1   as "Addressline1"
         , lr_addr_rec.lot_number       as "Addressline1"
         , lr_addr_rec.address_city     as "City"
         , lr_addr_rec.address_state    as "State"
         , lr_addr_rec.address_postcode as "PostCode"
         )
       )
FROM dual;

Tags: Database

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Hello guys,.
need help, im having trouble removing the tag < EVENT [elem = 6] >
< EVENTS elem = "6" >
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< PROMO_ID / >
< TO_CODE / >
< TELCO_INFO >
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< RATE_TAG / >
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< AMOUNT_GROSS > 1 < / AMOUNT_GROSS >
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< SYS_DESCR > Cycle before expenses (rev): 549 DUAL-DEF < / SYS_DESCR >
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Your XML file is invalid because it is not an outside element. In any case, after that...

with Data (THE_XML) as)

Select xmltype (')

0063

63937390517

DATA

20/11/2015-22:08

20/11/2015-22:08

0.89

258

103229

VAT

0.11

4

0.89

VAT

1

1

0.89

Cycle advance costs (rev): DUAL-DEF 549

1

Plan

490,18

1

VAT

549

Plan

-490.18

32

VTSKY

100% discount

490,18

Tax

58,82

4

VAT

-490.18

Tax

-58.82

4

VTSKY

0

20/12/2015-00:00:00

20/01/2016 00:00:00

20/12/2015-00:00:00

20/12/2015-00:00:00

490,18

0

')

of the double

)

Select deletexml (the_xml, "/ ROOT/EVENTS[@elem="6 "and SYS_DESCR]')

from the data

(As requested) RESULT

0063

63937390517

DATA

20/11/2015-22:08

20/11/2015-22:08

0.89

258

103229

VAT

0.11

4

0.89

VAT

1

1

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