Loading XML file where data structure may vary

Hi guys,.

I'm trying to load a XML data file in an Oracle table, with some success, but it will fail to load certain lines when an element is missing. Here is an example of two rows of data:

<? XML version = "1.0" encoding = "utf-8"? >

< ReportDetails >

< ReportRequest >

< ExtractDate > 25/03/2010 < / ExtractDate >

< CaseNoReportRequest > 1234567 < / CaseNoReportRequest >

individual details < IndividualDetailsText > < / IndividualDetailsText >

< IndividualDetails >

< CaseNoIndividual > 1234567 < / CaseNoIndividual >

< title > < /title > MR

<>men < / Type >

Steve < FirstName > < / name >

< Name > test < / name >

Detail of < occupation > < / Occupation >

< / IndividualDetails >

Information about insolvency < CaseDetailsText > < / CaseDetailsText >

< CaseDetails >

< CaseNoCase > 1234567 < / CaseNoCase >

STEVE TEST < CaseName > < / CaseName >

Court of County of Preston < > < / Court >

Bankruptcy of < CaseType > < / CaseType >

< / CaseDetails >

< InsolvencyContactText > of insolvency services contact information < / InsolvencyContactText >

< InsolvencyContact >

< CaseNoContact > 1234567 < / CaseNoContact >

Blackpool < InsolvencyServiceOffice > < / InsolvencyServiceOffice >

Bureau of investigation < contact > < / Contact >

< / InsolvencyContact >

< / ReportRequest >

< ReportRequest >

< ExtractDate > 25/03/2010 < / ExtractDate >

< CaseNoReportRequest > 8901234 < / CaseNoReportRequest >

individual details < IndividualDetailsText > < / IndividualDetailsText >

< IndividualDetails >

< CaseNoIndividual > 8901234 < / CaseNoIndividual >

< title > < /title > MISS

Female < sex > < / Type >

Francesca < FirstName > < / name >

< Name > test < / name >

Clerk Administration < occupation > < / Occupation >

< / IndividualDetails >

< BankruptcyRestrictionsDetails >

< RestrictionsType > BANKRUPTCY RESTRICTIONS ORDER (BRO) < / RestrictionsType >

< RestrictionsStartDate > 19/07/2005 < / RestrictionsStartDate >

< RestrictionsEndDate > 19/07/2012 < / RestrictionsEndDate >

< / BankruptcyRestrictionsDetails >

Practitioner of the insolvency of < InsolvencyPractitionerText > contact information < / InsolvencyPractitionerText >

< IP >

< CaseNoIP > 8901234 < / CaseNoIP >

< MainIP > Kevin Morrison < / MainIP >

< /IP >

< InsolvencyContactText > of insolvency services contact information < / InsolvencyContactText >

< InsolvencyContact >

< CaseNoContact > 8901234 < / CaseNoContact >

Cardiff < InsolvencyServiceOffice > < / InsolvencyServiceOffice >

Bureau of investigation < contact > < / Contact >

< / InsolvencyContact >

< / ReportRequest >

< / ReportDetails >

It is the PL/SQL that I use to try to load it:

DECLARE

acct_doc XMLTYPE: = XMLTYPE (BFILENAME('FLA','data_file.xml'), NLS_CHARSET_ID ('AL32UTF8'));

BEGIN

INSERT INTO target_table)

extract_date,

case_no_report_request,

case_no_individual,

title,

gender,

first name,

family name,

occupation,

case_no_case,

case_name,

Court,

case_type,

case_no_contact,

insolvency_service_office,

contact

)

SELECT x1.extractdate,

x1.casenoreportrequest,

X2.casenoindividual,

X2.title,

x 2. Gender,

x 2. FirstName,

x 2. Surname,

X2.occupation,

x 3 .case_no_case,

x 3 .case_name,

X3.Court,

x 3 .case_type,

x 4 .case_no_contact,

x 4 .insolvency_service_office,

X4.contact

FROM XMLTABLE)

' / ReportDetails/ReportRequest.

PASSAGE acct_doc

COLUMNS header_no to ORDINALITE,

extractdate PATH VARCHAR2 (10) "ExtractDate."

casenoreportrequest NUMBER of path 'CaseNoReportRequest '.

) x 1,

XMLTABLE)

"$d/ReportDetails/ReportRequest [$hn] / ' IndividualDetails"

PASSAGE acct_doc "d."

x 1 .header_no LIKE "hn".

Casenoindividual COLUMN NUMBER PATH "CaseNoIndividual."

title VARCHAR2 (20) PATH "Title."

sex VARCHAR2 (20) PATH "Gender."

First name VARCHAR2 (30) PATH "First name",

name VARCHAR2 (30) PATH "name."

occupation VARCHAR2 (50) PATH "Profession".

) x 2,

XMLTABLE)

"$d/ReportDetails/ReportRequest [$hn] / ' CaseDetails"

PASSAGE acct_doc "d."

x 1 .header_no LIKE "hn".

Case_no_case COLUMN NUMBER PATH "CaseNoCase."

case_name PATH VARCHAR2 (50) "CaseName"

VARCHAR2 (40) path 'Court',

case_type PATH VARCHAR2 (40) "CaseType.

) x 3.

XMLTABLE)

"$d/ReportDetails/ReportRequest [$hn] / InsolvencyContact'"

PASSAGE acct_doc "d."

x 1 .header_no LIKE "hn".

Case_no_contact COLUMN NUMBER PATH "CaseNoContact."

insolvency_service_office PATH VARCHAR2 (20) "InsolvencyServiceOffice."

Contact PATH VARCHAR2 (30) "Contact".

) x 4;

COMMIT;

END;

The first row of the loads fine, but the second row is not at all responsible. I expected he would charge what information there but with NULL values for the missing "CaseDetails" element but it charge nothing at all. If I change the data and manually add it in an element 'CaseDetails', line load. Can someone explain to me how I can get all the lines to load even if some parts are missing?

Wrong approach altogether.

There is no need to join via a positional predicate in this case, just use a single query:

SQL> SELECT x.*
  2  FROM XMLTABLE (
  3         '/ReportDetails/ReportRequest'
  4         PASSING xmltype(bfilename('XML_DIR','data_file.xml'), nls_charset_id('AL32UTF8'))
  5         COLUMNS extractdate                VARCHAR2(10) PATH 'ExtractDate'
  6               , casenoreportrequest        NUMBER       PATH 'CaseNoReportRequest'
  7               , casenoindividual           NUMBER       PATH 'IndividualDetails/CaseNoIndividual'
  8               , title                      VARCHAR2(20) PATH 'IndividualDetails/Title'
  9               , gender                     VARCHAR2(20) PATH 'IndividualDetails/Gender'
 10               , firstname                  VARCHAR2(30) PATH 'IndividualDetails/FirstName'
 11               , surname                    VARCHAR2(30) PATH 'IndividualDetails/Surname'
 12               , occupation                 VARCHAR2(50) PATH 'IndividualDetails/Occupation'
 13               , case_no_case               NUMBER       PATH 'CaseDetails/CaseNoCase'
 14               , case_name                  VARCHAR2(50) PATH 'CaseDetails/CaseName'
 15               , court                      VARCHAR2(40) PATH 'CaseDetails/Court'
 16               , case_type                  VARCHAR2(40) PATH 'CaseDetails/CaseType'
 17               , case_no_contact            NUMBER       PATH 'InsolvencyContact/CaseNoContact'
 18               , insolvency_service_office  VARCHAR2(20) PATH 'InsolvencyContact/InsolvencyServiceOffice'
 19               , contact                    VARCHAR2(30) PATH 'InsolvencyContact/Contact'
 20       ) x ;

EXTRACTDATE CASENOREPORTREQUEST CASENOINDIVIDUAL TITLE    GENDER     FIRSTNAME     SURNAME    OCCUPATION              CASE_NO_CASE CASE_NAME    COURT                 CASE_TYPE    CASE_NO_CONTACT INSOLVENCY_SERVICE_OFFICE CONTACT
----------- ------------------- ---------------- -------- ---------- ------------- ---------- ----------------------- ------------ ------------ --------------------- ------------ --------------- ------------------------- ---------------
25/03/2010              1234567          1234567 MR       Male       Steve         Test       Retail                       1234567 STEVE TEST   Preston County Court  Bankruptcy           1234567 Blackpool                 Enquiry Desk
25/03/2010              8901234          8901234 MISS     Female     Francesca     Test       Administration Clerk                                                                         8901234 Cardiff                   Enquiry Desk

Tags: Oracle Development

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