Remove the unnecessary tags in XML using PL/SQL

Question

Hi Friends
from the below XML, its generate by a complex SQL query, Now we need to remove all the object type tags, and all the empty tags.
Version - PL/SQL Release 11.2.0.3.0 - Production
<MajorLine>
    <MAJOR_LINE_OBJECT_TYPE> -- Need to remove these Objects types showing in the XML
        <LINEID>143424538</LINEID>
        <ITEMNAME>TC-ABC-123</ITEMNAME>
        <ITEMPATH>78245</ITEMPATH>
        <QUANTITY>10</QUANTITY>
        <SERVICELINE/> -- Need to remove all the Empty tags
        <MINORLINE>
            <MINOR_LINE_OBJECT_TYPE> -- Need to remove these Objects types showing in the XML
                <LINEID>143424799</LINEID>
                <ITEMNAME>TCC-abc</ITEMNAME>
                <ITEMPATH>78245</ITEMPATH>
                <QUANTITY>10</QUANTITY>
                <SERVICELINE/>-- Need to remove all the Empty tags
                <MINOR_MINOR_LINES>
                    <M_MINOR_LINE_TYPE> -- Need to remove these Objects types showing in the XML
                        <LINEID>143424798</LINEID>
                        <ITEMNAME>SF15-abc-xyz</ITEMNAME>
                        <ITEMPATH>78245</ITEMPATH>
                        <QUANTITY>10</QUANTITY>
                  </M_MINOR_LINE_TYPE>-- Need to remove these Objects types showing in the XML
                </MINOR_MINOR_LINES>
            </MINOR_LINE_OBJECT_TYPE>--Need to remove these Objects types showing in the XML
        </MINORLINE>
    </MAJOR_LINE_OBJECT_TYPE>-- Need to remove these Objects types showing in the XML
</MajorLine>
i tried one of the queries posted in this blog ,PFB  to remove the empty tags , but it didnt work for me unfortunately. Please help.
PFB
WITH sample_data AS (
  SELECT xmltype('<MajorLine>
    <MAJOR_LINE_OBJECT_TYPE>
        <LINEID>143424538</LINEID>
        <ITEMNAME>hijk</ITEMNAME>
        <ITEMPATH>78245</ITEMPATH>
        <QUANTITY>10</QUANTITY>
        <SERVICELINE/>
        <MINORLINE>
            <MINOR_LINE_OBJECT_TYPE>
                <LINEID>143424799</LINEID>
                <ITEMNAME>efg</ITEMNAME>
                <ITEMPATH>78245</ITEMPATH>
                <QUANTITY>10</QUANTITY>
                <SERVICELINE/>
                <MINOR_MINOR_LINES>
                    <M_MINOR_LINE_TYPE>
                        <LINEID>143424798</LINEID>
                        <ITEMNAME>abc</ITEMNAME>
                        <ITEMPATH>78245</ITEMPATH>
                        <QUANTITY>10</QUANTITY>
                    </M_MINOR_LINE_TYPE>
                </MINOR_MINOR_LINES>
            </MINOR_LINE_OBJECT_TYPE>
        </MINORLINE>
    </MAJOR_LINE_OBJECT_TYPE>
</MajorLine>') xmldoc
  FROM dual
SELECT deleteXML( t.xmldoc
                , '/MajorLine/*[.="" or contains(.,"?")]'
                ) as result
FROM sample_data t
My email ID is [email protected] -- You can reach me
thanks in advance ... Arun thomas T

Answer 1

Hey Odie. Great to see you again, the query is
SELECT XMLELEMENT (
          "MajorLine",
          major_line_object_type (
oola_major.line_id,
oola_major.ordered_item,
oola_major.header_id,
oola_major.ordered_quantity,
             CAST (
                MULTISET (
                   SELECT oola_ser.line_id,
oola_ser.ordered_item,
--oola_ser.header_id,
oola_ser.ordered_quantity,
CAST (
                             MULTISET (
SELECT oola_ser2.service_start_date,
oola_ser2.service_end_date,
oola_ser2.service_duration
                                  FROM oe_order_lines_all oola_ser2
                                 WHERE oola_major.line_id =
oola_ser2.service_reference_line_id
                                       AND oola_ser2.header_id =
oola_major.header_id) AS service_period_table_type)
FROM oe_order_lines_all oola_ser
                    WHERE oola_major.line_id =
                             oola_ser.service_reference_line_id
AND oola_ser.header_id = oola_major.header_id) --As of now excluding cross order service line
AS SERVICE_TABLE_TYPE),
             CAST (
                MULTISET (
                   SELECT oola_minor.line_id,
oola_minor.ordered_item,
oola_minor.header_id,
oola_minor.ordered_quantity,
CAST (
                             MULTISET (
                                SELECT oola_ser1.line_id,
oola_ser1.ordered_item,
                                       -- oola_ser1.header_id,
oola_ser1.ordered_quantity,
                                       CAST (
                                          MULTISET (
                                             SELECT oola_ser3.
service_start_date,
oola_ser3.
service_end_date,
oola_ser3.
service_duration
                                               FROM oe_order_lines_all oola_ser3
                                              WHERE oola_minor.line_id =
oola_ser3.
service_reference_line_id
AND oola_ser3.header_id =
oola_major.
header_id) AS service_period_table_type)
                                  FROM oe_order_lines_all oola_ser1
                                 WHERE oola_minor.line_id =
oola_ser1.service_reference_line_id
                                       AND oola_ser1.header_id =
oola_major.header_id) --As of now excluding cross order service line
AS SERVICE_TABLE_TYPE),
CAST (
                             MULTISET (
                                SELECT oola_minor_m.line_id,
oola_minor_m.ordered_item,
                                       oola_minor_m.header_id,
oola_minor_m.ordered_quantity
                                  FROM oe_order_lines_all oola_minor_m
                                 WHERE oola_minor.line_id =
                                          oola_minor_m.link_to_line_id
                                       AND oola_minor_m.header_id =
oola_major.header_id) --As of now excluding cross order service line
                                                                   AS m_minor_line_table_type)
FROM oe_order_lines_all oola_minor
                    WHERE    --oola_minor.top_model_line_id=oola_major.line_id
oola_minor.link_to_line_id = oola_major.line_id
AND oola_minor.header_id = oola_major.header_id
AND oola_minor.item_type_code != 'SERVICE') AS MINOR_LINE_TABLE_TYPE)))
          AS "XMLOutput"
  FROM oe_order_lines_all oola_major
WHERE oola_major.line_id = 143424538 AND oola_major.link_to_line_id IS NULL;
can we rewirte it to get the desired out put ..
Desired output is Just remove the Object_type tags and empty tags coming in the output xml.
The previous issues i mentioned are not solved yet  . actually will update the challenges ..
Odie .. thanks.. again