SQL function extract

Hello XML Guru,
Could you tell me where i can find informations about how SQL function extract works for extracting XML data stored as relational-object?
Is VIEW always created for extracting XML data when executing this SQL function extract?
Thanks for your help.

You'll find documentation on this function in the [Oracle XML DB Developer's Guide| http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14259/xdb03usg.htm#sthref336] .
HTH
Chris

Similar Messages

SQL functions extract and XMLSequence for a one-to-many (1:N) relationship

I have have the following XML document loaded into a XMLType table. I'd like to retrieve the lineitem id together with the purchaseorder id and report id. How would the query look like? I've tried a lot but this one-to-many relationship is killing me.
Many thanks!
<report id=...>
<purchaseorder id=...>
<lineitems>
<lineitem id=...>...</lineitem>
<lineitem id=...>...</lineitem>
<lineitem id=...>...</lineitem>
</lineitems>
</purchaseorder>
<purchaseorder id=...>
<lineitems>
<lineitem id=...>...</lineitem>
</lineitems>
</purchaseorder>

You can easily modify the above query to your needs:
SQL> with qry as (
2 select t.column_value.extract('/report/@id') report_id,
3         t.column_value.extract('/report/purchaseorder') purchaseorder,
4         t.column_value.extract('/report/purchaseorder/lineitems/*') lineitems
5 from table(xmlsequence(xmltype('<document>
6                                    <chapter>
7                                      <report id="1">
8                                        <purchaseorder id="1">
9                                          <lineitems>
10                                            <lineitem id="1">Item 11</lineitem>
11                                            <lineitem id="2">Item 12</lineitem>
12                                            <lineitem id="3">Item 13</lineitem>
13                                          </lineitems>
14                                        </purchaseorder>
15                                        <purchaseorder id="2">
16                                          <lineitems>
17                                            <lineitem id="1">Item 21</lineitem>
18                                          </lineitems>
19                                        </purchaseorder>
20                                      </report>
21                                      <report id="2">
22                                        <purchaseorder id="1">
23                                          <lineitems>
24                                            <lineitem id="1">Item 31</lineitem>
25                                            <lineitem id="2">Item 32</lineitem>
26                                          </lineitems>
27                                        </purchaseorder>
28                                        <purchaseorder id="2">
29                                          <lineitems>
30                                            <lineitem id="1">Item 41</lineitem>
31                                            <lineitem id="2">Item 42</lineitem>
32                                          </lineitems>
33                                        </purchaseorder>
34                                      </report>
35                                    </chapter>
36                                  </document>'
37 ).extract('/document/chapter/*'))) t)
38 select q.report_id,
39         q1.column_value.extract('/purchaseorder/@id') purchase_id,
40         q2.column_value.extract('/lineitem/@id') lineitem_id,
41         q2.column_value.extract('/lineitem/text()') lineitem
42 from qry q,
43       table(xmlsequence(q.purchaseorder)) q1,
44       table(xmlsequence(q1.extract('/purchaseorder/lineitems/*'))) q2
45 /
REPORT_ID PURCHASE_ID     LINEITEM_ID     LINEITEM
1          1               1               Item 11
1          1               2               Item 12
1          1               3               Item 13
1          2               1               Item 21
2          1               1               Item 31
2          1               2               Item 32
2          2               1               Item 41
2          2               2               Item 42
8 rows selected.
SQL>

SQL function to extract XML namespace prefix

Hi,
I have the following document
<ns4:product xmlns:ns1="www.abc.com" xmlns:ns2="www.def.com" xmlns:ns3="www.ghi.com" xmlns:ns4="www.jkl.com">
<ns4:productline>Widget</ns4:productline>
</ns4:product>
I'm trying to find a SQL function which will enable me to extract the namespace prefix with the value "www.jkl.com". This is so that I can then use the prefix as part of the xpath expression to search for an element value in the document eg. extractvalue('/ns4:product/ns4:productline')
Thanks

Try DBMS_XMLDOM.GetNameSpace

SQL Query (PL/SQL function body returning SQL query) when using to_char

we are trying to build a report page of Type SQL Query (PL/SQL function body returning SQL query).
our query is so simple, we need to extract the month from the recording_date column.
declare
l_query varchar2(1000);
begin
l_query:='select to_char(recording_date,'MM')from re_productive';
return l_query;
end;
but we are having the following problem for this query
Function returning SQL query: Query cannot be parsed within the Builder. If you believe your query is syntactically correct, check the generic columns checkbox below the region source to proceed without parsing.
(ORA-06550: line 4, column 42: PLS-00103: Encountered the symbol "MON" when expecting one of the following: . ( * @ % & = - + ; < / > at in is mod remainder not rem <> or != or ~= >= <= <> and or like between || multiset member SUBMULTISET_ The symbol ". was inserted before "MON" to continue.)
Notes:
1-the query is correct and it was tested under Toad and SQL Plus.
2- we tried Use Generic Column Names (parse query at runtime only) option but we get the same problem.
any quick help please.

Hi
You haven't escaped your quotes in the string. Try this...
DECLARE
l_query VARCHAR2(32767);
BEGIN
l_query:= 'select to_char(recording_date,''MM'') from re_productive';
RETURN l_query;
END;Cheers
Ben

SQL functions in Script Logic

I want to build a script logic but the dimensions that I am testing do not have the fields I want in the format I want. In my case I would like to test the "Start" property in the Employee dimension. The property represents the employee start date but is a var char in the format dd.mm.yyyy rather thna a date field. I want to test whether it is five years prior to the date being processed.
My time dimension has a year property and a monthnum property. Each of these are varchar. I can write SQL that would convert these to a date and compare them with the start property on the employee dimension.
Can I do iinsert SQL functions in the When statement. An example would be
*When convert(datetime, substring(employee.start,4,2) + '/' + substring(employee.start,1,2) + '/' + substring(employee.start,7,4))
Can I use SQL functions in the Is statement? An example would be
*Is <DateAdd(YY,-5 , convert(datetime, Time.Monthnum + '/01/'' + time.year)
Finally when I use such techniques and look at the log by using "show log" in the logic debugger I see no reference to the SQL I used. It is as if the generated SQL has not made use of my functions. Instead all I seee are the extract statements from the three fact tables. Is this normal? Is there a way to see what SQL is really being generated and run?
At the moment it seems my only option is to make changes, try running it and hope I get an output. If no records are written I can't be sure whether it is because embedding SQL function is not supported or because I have made some other error.

No, the "BPC SQL" script logic doesn't allow for this extensive use of real SQL within the scripting syntax. As a concept, it's best to think of "BPC SQL" script logic as, "this unique BPC logic syntax will generate real SQL code when it's executed."
There's very little real SQL that you can use within the syntax itself, and definitely not within the WHEN or IF statements. Nothing like cast, convert, substring, etc. (Except you CAN use these, a little bit, in a *SELECT statement. But I don't see how that will solve your current problem.)
Plus, when you consider how the logic engine processes a set of data, it's helpful to think of it in terms of selects & reading through a recordset. So in that regard, a SQL background can be helpful, in understanding the concepts. (Sort of helpful, except when it confuses you, or frustrates you since you don't have all the power you want.)
Anyway, to solve your problem, you might be able to restate the problem, and then use something like this code, which is valid syntax:
*WHEN TIME.TIMEID
*IS >= VERSION.FirstPlanMonthTimeID
In this case, FirstPlanMonthTimeID is set up in the version dimension as, for example, 20090400 (representing 2009.APR). This timeID is set by BPC automatically when processing the time dimension, and I need to ensure that my Version property value is set to match it.
A key point is that in BPC fact tables, the time dimension is stored as TIMEID (not ID, unlike all the other dimensions), and can be used for comparative evaluation in script logic WHEN/IF. The comparison property needs to be stored as an 8-digit integer value. If your time dimension has days in it (along with months), check the TIMEID after processing, and you should see the pattern for assigning values to TIMEID for days and months, etc.
Normally, TIMEID is assigned pretty sensible and stable values. If it doesn't meet your logic requirements, you can create another property (be careful of USERTIMEID, since that has a specific purpose in the system which I've never fully understood) and assign that whatever (integer) values make sense.

Using pl/sql functions for transformation

How can I use pl/sql functions in the transformation mapping field for my interface?
I have a name field where firstname and lastname are concatenated via a space-character and I would like to extract this 'name' field to 2 separate database attributes.
This means that I need to use a function that uses SUBSTRING and INSTR to be able to get the firstname and lastname separatly out of the name-field.
The INSTR-function isn't known inside the expression editor in ODI so I'm wondering how I can use my own function?

Hi Romanna,
Are you sure? Where did you do your transformation?
-Source, Staging area or Target
I try this on Oracle target...
FIRST_NAME = substr(MYTABLE.FIRST_LASTNAME, 1, instr(MYTABLE.FIRST_LASTNAME, ' ')-1)
LAST_NAME = substr(MYTABLE.FIRST_LASTNAME,instr(MYTABLE.FIRST_LASTNAME, ' ')+1)

Register PL/SQL functions

Hi,
I want to use the EXTRACT function in Discoverer. I went through the Help for the «Import PL/SQL function» without success....
When I click the «Import» button, I see a HUGE list of functions, and I don't recognize which is the one I want.
I use that EXTRACT in the same database with PL/SQL developer and it works fine, but I get a «Function EXTRACT has not been registered with the EUL» message when I try to use it in Discoverer.
Any one knows how to «bring» the right function in the EUL ??
Thanks.

I was able to import a Oracle standard package function SYS_CONTEXT and view it in Discoverer Desktop/Plus.
However when I create my own package function in a schema "xxdev" and then import via Disco Admin, I cannot view this function in Discoverer Desktop/Plus. These are the steps that I followed to implement it:
1. create package in xxdev schema
2. grant execute on package to noetix_sys & noetix_eul
3. register the function in Disco Admin
4. login to Disco Desktop/Plus and try creating a calculation field and lookup functions.
The function is not visible. I followed the exact same steps for STANDARD.SYS_CONTEXT function and it was visible. Is something missing in my steps to do?
Thanks in advance.

SQL Function DAYNAME( )

Id like to use the SQL Function dayname, to extract items in my database which occur on a particular day of the week, e.g. all events on Wednesday....currently im using the jdbc:odbc bridge to MS Access...i get undefined function error...am i just limited because of the MS Access, or can i not use this function at all?
here is my test query, just to see if i could get the name of the day (i realize i am not querying for the dayname here, just trying to see if the function works):
ps = connxion.prepareStatement( "SELECT Event,StartDate DAYNAME(StartDate) FROM WebCalendar WHERE StartDate BETWEEN ? AND ? ORDER BY StartDate" );
ps.setDate(1,startMonth);
ps.setDate(2,endMonth);

All database use their own functions and syntax as a superset of standard SQL. Here is what you could use for Microsoft Access:
SELECT
Event,
StartDate,
Format(StartDate,'dddd')
FROM
WebCalendar
WHERE
StartDate BETWEEN ?
AND ?
ORDER BY
StartDateJoel

Sql for extract file path without file_name form the folumn value

Dear Experts,
can someone give the sql script to extract file path without file_name form the folumn value.
can someome provide sql to extract only path in the column value.
column value :
/data/rrsapus/oradata22/rrsa_25122011rpsp_arpch.rsp
i need output like this */data/rrsapus/oradata22/*

Hi,
Welcome to the forum!
INSTR and SUBSTR is probably the most efficient way. Use INSTR to find where the last '/' is, and SUBSTR to get that many characters, starting from the beginning of the string.
INSTR and SUBSTR (and REGEXP_SUBSTR, and REGEXP_REPLACE, and RTRIM, and REPLACE, and all the other bullt-in functions) are documented in the SQL language manual:
http://docs.oracle.com/cd/B28359_01/server.111/b28286/index.htm
REGEXP_SUBSTR or REGEXP_REPLACE would also do the job, perhaps with a little less code, but maybe not as efficiently.
Here's a more creative way:
SELECT     RTRIM ( str
           , REPLACE (str, '/')
           )          AS file_path
FROM     table_x
;What results do you want if str does not contain a '/'?

Report- Pl/sql function returning sql query parsing page items as text?

Hi Team,
I am facing a strange issue .
I have four page items namely
1)JOB_CODE
2)MIN_EXP
3) MAX_EXP
4) SOURCES1
I have a report of the type "Pl/sql function returning sql query"
declare
v_sql varchar2(4000);
begin
if (:JOB_CODE IS NOT NULL and :MIN_EXP IS NOT NULL and :MAX_EXP IS NOT NULL and :SOURCES1 IS NOT NULL) then
v_sql:= 'select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where V_REQUIREMENT = :JOB_CODE and v_experience_years >= :MIN_EXP and v_experience_years <= :MAX_EXP and source like ' || '''' || '%'|| ':SOURCES1' || '%' || '''';
elsif (:JOB_CODE IS NULL and :MIN_EXP IS NOT NULL and :MAX_EXP IS NOT NULL and :SOURCES1 IS NOT NULL) then
v_sql := 'select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where v_experience_years >= :MIN_EXP and v_experience_years <= :MAX_EXP and source like ' || '''' || '%'|| ':SOURCES1' || '%' || '''';
elsif (:MIN_EXP IS NULL and :JOB_CODE IS NOT NULL and :MAX_EXP IS NOT NULL and :SOURCES1 IS NOT NULL) then
v_sql := 'select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where v_experience_years <= :MAX_EXP and V_REQUIREMENT = :JOB_CODE and source like ' || '''' || '%'|| ':SOURCES1' || '%' || '''';
elsif (:MAX_EXP is null and :JOB_CODE IS NOT NULL and :MIN_EXP IS NOT NULL and :SOURCES1 IS NOT NULL) then
v_sql := 'select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where V_REQUIREMENT = :JOB_CODE and v_experience_years >= :MIN_EXP and source like ' || '''' || '%'|| ':SOURCES1' || '%' || '''';
end if;
insert into query_list values (v_sql);
insert into debug values (:JOB_CODE , :MIN_EXP , :MAX_EXP , :SOURCES1);
return v_sql;
end;
Please not that I am insertin the query into a table called Query_list and the page item values into the table called Debug thru the pl/sql function which returns teh query.
Now I select the data from the debug tables.
select unique(query) from query_list;
select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where V_REQUIREMENT = :JOB_CODE and v_experience_years >= :MIN_EXP and v_experience_years <= :MAX_EXP and source like '%:SOURCES1%'
select * from debug;
JOBCODE     MINEX     MAXEX     SOURCE
21     1     10     donkeyHire
And if I run the query in sql I get some records returned
select v_candidate_id, v_fname,v_current_employer,v_Experience_years from candidature where V_REQUIREMENT = 21 and v_experience_years >= 1 and v_experience_years <= and source like 'donkeyHire'
V_CANDIDATE_ID     V_FNAME     V_CURRENT_EMPLOYER     V_EXPERIENCE_YEARS
2     Vengu     Andale Tech     4
But the record does not show up in the report!
does this type of report parse page items as text?
Why is it so?
Waiting for an early reply.
Thanks,
venkat

Venkat - You don't want to put ':SOURCES1' in quotes like that.
Scott

Passing Multiple Values from a worksheet to PL/SQL function.

Hi All,
Is there any way to pass multiple values selected in a worksheet to a PL/SQL function ?
I will try to explain the scenario:
We have a crosstab report that showing all the customer details, deposit sum of a customer in each date in a date range selected. With the customer details we are showing the Rank of a customer based on the deposit in the latest date selected. Filtering is based on the rank, ie Top50 or Top60 etc.( As I said rank is calculating based on the deposit in the latest date).This is working fine.
Now the new requirement is to : For example, in Top50 report, list all the customers, who were in the Top50 list, in any of the dates selected. We are able to display the daywise rank, but when giving a condition like daywiserank <= 50, the result becomes uncertain. Some blank lines, wrong amounts etc..
As a work around we tried to find out the rank in a PL/SQL function. But the issue there is : we have some multiple value parameters used in the worksheet.
Is there any way to pass multiple values selected in a worksheet to a PL/SQL function ?
Or any other work arounds for the scenario explained?
Reagrds,
Jeneesh

Hi Russ,
Thanks for the response.
Russ Proudman wrote:
1. I thought there was an analytical function similar to rank - or maybe an option of rank - that if there are duplicate records to have them all considered the same rank. So if you had 3 records all the same as rank=2 then a condition saying where rank=2 would return the 3 records. You could check into this.
We are already using DENSE_RANK. But the issue is the output contains incorrect null values nd repeated rows.
We got it solved as I explained in the previous post. But will that AGGREGATION MODE setting ( Which discoverer says - not recommended) have any issue? I mean side effects?
Russ Proudman wrote:
2. Another thought is that you can create a PL/SQL routine - that's called from a SQL function registered in Discoverer - where a table is created that does the first part of your query. Then a worksheet is created to use the data from that table. So, in essence, the table would have your top50 ranked customers. Then you can write any kind of worksheet against that table. However, DBAs are loath to allow tables - that they didn't create! - many times in a PROD environment.
Here also the same problem will occur: as the top 50 will depend upon the parameters. I cannot pass those parameters to PL/SQL Function.And storing the top50 ( itmay be top100 or to 150 also) for all combinations of the parameters is impossible
Russ Proudman wrote:
3. Finally, are you sure you're rank function is correct in that if you're getting blank lines, maybe the 'over' part is not considering all columns needed to determine the rank?
Yes the query we are using is correct. The output QUERY of discoverer gives correct results in Sqlplus.
Regards,
Jeneesh

Show refcursor returned by a PL/SQL function ?

Is it possible to show the results returned by a
PL/SQL function that returns a refcursor ?
In sqlplus it goes like this:
SQL> variable a refcursor;
SQL> execute :a := p_front.get_invoice_list;
PL/SQL procedure successfully completed.
SQL> print a;
INVOICE_ID CLIENT_ID INVOICE_D
101 100 01-APR-06
100 100 06-APR-06
If not, this would be on the top of my wishlist...
By the way: you did a good job on this tool!
Regards,
Willem

Is it possible to show the results returned by a
PL/SQL function that returns a refcursor ?
In sqlplus it goes like this:
SQL> variable a refcursor;
SQL> execute :a := p_front.get_invoice_list;
PL/SQL procedure successfully completed.
SQL> print a;
INVOICE_ID CLIENT_ID INVOICE_D
101 100 01-APR-06
100 100 06-APR-06
If not, this would be on the top of my wishlist...
By the way: you did a good job on this tool!
Regards,
Willem

Application Report Missing PL/SQL Functional Area

All,
I just wanted to bring to the ApEx developers something I just noticed... I use the Shared Components > Database Object Dependencies report to make sure all is well before moving applications into production.
The Parsing Errors feature of that report is WONDERFUL! But it seems to be overlooking buttons that use a conditional display based on PL/SQL Function Body Returning a Boolean.
Dan

Hi Dan,
I think the place is perfect, but I read once somewhere that "Bug" or "Bug Report" should be in the subject so that's easier to find for the Oracle guys.
Patrick
My APEX Blog: http://inside-apex.blogspot.com
The ApexLib Framework: http://apexlib.sourceforge.net
The APEX Builder Plugin: http://sourceforge.net/projects/apexplugin/

Interactive report from PL/SQL function

Hello All,
i have a pl/sql function that dynamically builds up a sql query and returns it as a varchar2.
when i create a new report then i can use this function in the report like
return f_function(param1,param2,v('APP_ID'), v('APP_SESSION'));
and this works fine.
Except i cannot create an interactive report for this function, because it is not allowed !!!!
So how can i use the function in an interactive report ?
Thanks in advance,
Marco

Marco,
Another rather extreme approach would be to go all the way and make your function pipelined (that is not only build but also execute the query) and then select from it in your interactive report.
The disadvantage here would be that any supplementary filtering would act on the result set of the function (not as an addition to the where clause of the original query). But if you can live with that...
The advantage would be that there's less fiddling with column headers.
Regards,
Iulian

Interactive Report with PL/SQL Function Source

Is it possible to create interactive report with PL/SQL function source returing a query? If not, has anyone done any work to simulate the interactive reporting feature for a normal report using API?

I haven't tried that before but you could:
1. create a collection from your result set returned by a dynamic query,
2. create a view on that collection,
3. use the view in your interactive report.
The usability of this proposal depends from a question how "dynamic" your query is - does it always have the same number of columns or not.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://apex.oracle.com/pls/otn/f?p=31517:1
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SQL function extract

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