Generate hierarchical xml data with xmlutilities ?

Question

hello
I am just experimenting with the oracle xml utilities, because I
want to set on http-services to access to our patient database.
Is it possible to generate the following xml structure (ALL
relevant diagnoses are hierarchically subordered to the ONE
patient) when two tables (master table patient, dependent table
diagnoses) are given ?
<rowset>
<row num=...>
<name>smith</name>
<diagnosis>
<date> ...</date>
<icd-code> ... </icd-code>
<text> ... </text>
</diagnosis>
/*ev.further diagnosis*/
</row>
/*ev.further rows for further patients*/
</rowset>
By the moment, I have the impression that only list-similar xml
data is possible.
Thank You very much for comments.
ali gerhard
null

Answer 1

Hi ali,
Yes, you can use the CAST(MULTISET()) operator to create a
nested table of subordered diagnostic record and display it.
(You need the objects option installed if you are using 8.0.
With 8i, the objects options is included free)
e.g.
/* Create a regular type */
CREATE TYPE diagnostic_type AS OBJECt
diag_date NUMBER,
icd_code NUMBER,
/* etc... all the necessary diagnostic details.. */
/* create a nested table type */
CREATE TYPE diagnostic_list_t AS TABLE OF diagnostic_type;
/* Now u can use this in any query */
SELECT p.name AS name,
CAST(MULTISET( SELECT d.diag_date, d.icd_code,...
FROM diagnosis_table d
WHERE d.patient_name = p.name)
AS diagnostic_list_t) AS diagnosis
FROM patient_table p;
This query as u can see gets the name of the patient and then
creates a nested table of diagnostic records for the patient.
This assumes that for every patient there are more than 1
diagnosis records.
If you have only one diagnostic record per patient then u can
simply write this as,
SELECT p.name AS name,
diagnostic_t(d.diag_date,d.icd_code,...) AS diagnosis
FROM patient_table p, diagnostic_table d
WHERE p.name = d.patient_name;
Here u are just constructing a structured diagnosis type from
the given values.
Hope this helps,
Murali
ali gerhard (guest) wrote:
: hello
: I am just experimenting with the oracle xml utilities, because
I
: want to set on http-services to access to our patient
database.
: Is it possible to generate the following xml structure (ALL
: relevant diagnoses are hierarchically subordered to the ONE
: patient) when two tables (master table patient, dependent
table
: diagnoses) are given ?
: <rowset>
: <row num=...>
: <name>smith</name>
: <diagnosis>
: <date> ...</date>
: <icd-code> ... </icd-code>
: <text> ... </text>
: </diagnosis>
: /*ev.further diagnosis*/
: </row>
: /*ev.further rows for further patients*/
: </rowset>
: By the moment, I have the impression that only list-similar
xml
: data is possible.
: Thank You very much for comments.
: ali gerhard
null