Conditional display of region with PL/SQL function returning SQL query

Hello,
ApEx 2.0.
I use PL/SQL functions that return SQL queries to display the contents of a region.
How could I conditionally display such region ? If no data is found, the region shouldn't be shown. I tried with "SQL query returns at least one row" but this doesn't seem to work.
Thanks,
Matthias

Hi Matthias,
Are the regions in question report regions? So your PL/SQL process is returning a SQL query and then populating a report?
The EXISTS(SQL Query returns at least one row) condition should work, try running the query you are using in the Expression 1 textarea inside SQL*Plus, or SQL developer using the same parameters, and see what gets returned.
If you are still stuck, can you post the query you are using inside your Expression 1 textarea of the Conditions section and I can take a look at it for you.
Hope this helps,
Cj

Similar Messages

Issue with running PL/SQL function returning Sql query

hi, I am trying to create a report region by using the option of PL/SQL function returning sql query.
I notice that it's very slow for the report region page to show up. In my PL/SQL function body, there are only 3 steps, first update all the 10 rows of varchar2 fields to null,then insert values to those fields, then select all from the table to show report results. It takes more than 5 minitues for the page to load up, how ever, if i run those steps in SQL*Plus, it only takes a couple of seconds to finish. Any suggestions?
Thanks,
gina

Sergio, the codes are as followed,
Declare
q varchar2(32767); -- query
Begin
q := 'select "ID",'||
'"ENTRY NAME","TOTAL","#CM","%CM","#CA",'||
'"%CA", from Info_table';
update info_table
set "TOTAL" = '',
"#CM" = '',
"%CM" = '',
"#CA" ='',
"%CA"=''
where "ID"<=10;
// set all data in column Total to null,there is only 10 rows in the table
update info_Table set Total = vTotal,
"#CM" = vCM
(those variables hold user key-in Text filed value)
where ID = 1;
return q;
End;

On Submit process not firing -report (PL/SQL function returning SQL query)

Can anyone suggest possible causes / solutions for the following problem?
I have a report region that uses a PL/SQL function returning SQL query. The report allows the user to update multiple fields / rows and then click a button to submit the page which should run the On-Submit process to update the database. However the process does not run and I get a 'HTTP404 page cannot be found' error; and when I navigate back using the Back button I cannot then navigate to any other page in my application without getting the same error. The button was created by a wizard selecting the options to submit the page and redirect to a (same) page. The button does not actually have a redirect in its definition but the wizard created a branch to the same page which should work and the button has the text 'submit as SUBMIT' next to it so it appears to be set up correctly.
I have recreated this page several times in my application and I cannot get the On-Submit process to run. However I have created a cut down version of the same page in the sample application on apex.oracle.com at http://apex.oracle.com/pls/otn/f?p=4550:1:179951678764332 and this works perfectly so I am at a loss to understand why it does not work in my application. I cannot post any part of the application itself but if anybody would like to check out page 30 of the sample application (Customer Update Test tab) updating the surnames only, using credentials ja, demo, demo this is pretty much what I have got in my application.
Any ideas would be much appreciated?

Thanks for the suggestions guys. I have now identified that the problem goes away when I remove the second table from my report query. The original report query retrieved data from two tables and the process was updating only one of the tables. I thought I had approached the task logically i.e. first get the report to display the records from the two tables, then get the process to update the first table and finally to modify the process further to update the second table.
Can anyone point me to an example of multiple row updates on multiple tables using a PL/SQL function returning an SQL query?

Column order in SQL Query (PL/SQL function returning a query)

Hi,
when I define a PL/SQL function returning a query inside a region, I often find that the column order is arbitrarily changed.
How do I enforce the column order ?
Bye,
Flavio

I removed the 11th column called service_name from this dynamic query: and now the report says: report error:
ORA-01403: no data found. I messed around with the Headiuns Type. It was set to Custom. I changed it to Column Names. There is no difference.
I am not sure how to fix?
declare topqry varchar2(32000);
whereqry varchar2(32000);
finalqry varchar2(32000);
var_status varchar2(100);
division_status varchar2(50);
office_status varchar2(1000);
user_status varchar2(1000);
overdue_status varchar2(1000);
begin
if :P10_FALLBACK = 'All' then
var_status:= ' and vp.status in (''FA'',''FBA'',''FBI'',''25%'',''50%'',''90%'',''Closed'') ';
elsif :P10_FALLBACK = 'Active' then
var_status:= ' and vp.status in (''FA'',''25%'',''50%'',''90%'',''FBA'') ';
elsif :P10_FALLBACK = 'FB' then
var_status:= ' and vp.status in (''FBA'',''FBI'') ';
elsif :P10_FALLBACK = 'Closed' then
var_status:= ' and vp.status in (''Closed'') ';
elsif :P10_FALLBACK = 'Inactive' then
var_status:= ' and vp.status in (''FBI'') ';
end if;
if :P10_DIVISION = 'All' then
division_status:= ' and vp.vms_division in (''News'',''Ad Services'') ';
elsif :P10_DIVISION = 'News' then
division_status:= ' and vp.vms_division in (''News'') ';
elsif :P10_DIVISION = 'Ad' then
division_status:= ' and vp.vms_division in (''Ad Services'') ';
end if;
if :P10_OFFICE = '%' then
office_status:= ' and OFFICE_ID in (select office
from VMS_OFFICE_ACCESS
where user_id = lower(:P0_user) ) ';
else
office_status:= ' and OFFICE_ID in :P10_OFFICE ';
end if;
if :P10_LIMIT_USER = '%' then
user_status := ' and SALESPERSON in (select first_name || '' '' || last_name
from VMS_PROSPECT_users u
join vms_office_access o
on u.office_id = OFFICE
where o.user_id = lower(:P0_USER) ) ';
else
user_status:= ' and SALESPERSON in (:P10_LIMIT_USER ) ';
end if;
if :P10_SHOW_OVERDUE = 'Show' then
overdue_status:= ' and target_close_date <= sysdate ';
var_status:= ' and vp.status in (''25%'',''50%'',''90%'',''FBA'') ';
else
overdue_status:= ' and FIRST_APPOINTMENT between
nvl(to_date(:P10_FIRST_APPT_START, ''mm/dd/yyyy''),FIRST_APPOINTMENT) and
nvl(to_date(:P10_FIRST_APPT_END,''mm/dd/yyyy''),FIRST_APPOINTMENT) ';
end if;
topqry := 'SELECT OFFICE_ID ,vp.PROSPECT_ID ,ENTRY_DATE ,ACCOUNT , NEXT_CONTACT_DATE ,ACTION_STEP ,
TARGET_CLOSE_DATE ,vp.STATUS ,SALESPERSON ,vp.SALES_TYPE ,service_name , FIRST_APPOINTMENT ,MODIFY_DATE ,EST_ANNUAL_REVENUE ,EST_INCREMENTAL_REVENUE ,
pi.NOTES , pi.SALES_TYPE ,pi.STATUS ,Contact ,Origin_Source FROM VMS_PROSPECTING_ITEMS pi right outer join VMS_PROSPECTS vp on vp.PROSPECT_ID = pi.PROSPECT_ID left outer join VMS_SERVICES vs on vs.service_ID = pi.service_ID where 1 = 1 ';
whereqry := ' and (not exists (select *
from VMS_PROSPECTING_ITEMS i3
where vp.prospect_id = i3.prospect_id)
or exists (select *
from VMS_PROSPECTING_ITEMS i2
where i2.order_id = pi.order_id
and active = ''Y'' )) and instr(upper(ACCOUNT),upper(nvl(:P10_ACCOUNT,ACCOUNT))) > 0 ';
whereqry := whereqry || var_status || division_status || office_status || user_status || overdue_status;
finalqry := topqry || whereqry;
return finalqry ;
end;

SQL Query(PL/SQL Function Returning SQL Query)

I am trying to write a dynamic report using SQL Query(PL/SQL Function Returning SQL Query).
I can get the report to run but I need to concatinate some columns into one, seperated by a comma or a dash.
I have tried select *****||','||***** alias
also select *****||'-'||***** alias
but I always get an error.
Is there a way of doing this please
Gus

This is my full query
declare
v_query varchar2(4000);
begin
if :P63_TRAN_INFO = 2 THEN
v_query := 'select
     A.FILENR,
     A.EXERCISENAME,
A.STARTDATE,
A.ENDDATE,
     A.UNIT,
A.ACCADDRESSES, B.ADDRESS, B.ADDRESS_1, B.POST_CODE, B.TOWN,
     A.EXERCISEAREAS,
     A.TOTALVEHICLES,
A.TOTALTROOPS+A.RNTOTALTROOPS+A.RAFTOTALTROOPS TOTALTROOPS,
A.CAR, A.MINIBUS, A.HGV,
A.NAMERANK, A.ADDRESS, A.ADDRESSI, A.ADDRESSII, A.POSTCODE,
A.TRANSIT,
A.INFOONLY
from     BFLOG_AT A, BFLOG_ACCADDRESS B
WHERE A.ACCADDRESSES = B.NAME
AND A.STARTDATE >= :P63_START_DATE
AND A.ENDDATE <= :P63_END_DATE
AND A.AUTHORISED = 1
AND A.INFOONLY = 1' ;
END IF;
RETURN v_query;
END;
This query runs ok, but if I try changing it to the code below with fields concatinated, then it fails
declare
v_query varchar2(4000);
begin
if :P63_TRAN_INFO = 2 THEN
v_query := 'select
     A.FILENR,
     A.EXERCISENAME,
A.STARTDATE,
A.ENDDATE,
     A.UNIT,
A.ACCADDRESSES||','||B.ADDRESS||','||B.ADDRESS_1||','||B.POST_CODE||','||B.TOWN ADDRESS,
     A.EXERCISEAREAS,
     A.TOTALVEHICLES,
A.TOTALTROOPS+A.RNTOTALTROOPS+A.RAFTOTALTROOPS TOTALTROOPS,
A.CAR, A.MINIBUS, A.HGV,
A.NAMERANK, A.ADDRESS, A.ADDRESSI, A.ADDRESSII, A.POSTCODE,
A.TRANSIT,
A.INFOONLY
from     BFLOG_AT A, BFLOG_ACCADDRESS B
WHERE A.ACCADDRESSES = B.NAME
AND A.STARTDATE >= :P63_START_DATE
AND A.ENDDATE <= :P63_END_DATE
--AND (A.EXERCISEAREAS LIKE "GAP, OA, OAL")
--OR (A.EXERCISEAREAS LIKE "Harz")
AND A.AUTHORISED = 1
AND A.INFOONLY = 1' ;
END IF;
RETURN v_query;
END;
Cheers
Gus

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

APEX, BI Publisher and SQL Query (PL/SQL Function returning SQL Query)..

I don't know if I should be posting this in this Forum or the BI Publisher forum, so I am posting in BOTH forums..
I love APEX, let me say that first.. And appreciate the support offered here by the group, but am running int a confusing issue when BI Publisher tries to build a report from the above type APEX report..
Here is my dilemma:
I have a number of reports that are part of a Oracle package. They return an SQL Query back to a reports region on a page. I am having to deal with the column names returned are col01, col02..
The issue I have is, when building the Application Level query to download the XML sample from in building RTF layouts in Word, you can not use this code, you MUST use a standard SQL Select.
I have taken the sql from the function returning sql, and copied into the application query, supplying the required data values for bind variables being used in the query.
An XML file is produced, and I use this to build the RTF format file that I load back into APEX and try to use it for the PDF rendering of the report. I can view the output as a PDF in the Word add on, but when I try using it with the report, it is returning an empty PDF file.
Can anyone tell me what error log files on the bi publisher side I can look at to see what error is happening?
Thank you,
Tony Miller
UTMB/EHN
Title changed, maybe SOMEONE has an idea on this??
Message was edited by:
Tony Miller

Hi,
1/ first check you are passing the bind variables and
appropriate values in the call to your report - if
the query returns no data then you get an empty page
So if your query takes :P10_USERNAME variable then
pass it to the report in the URL
f?p=&APP_ID.:0:&SESSION.:PRINT_REPORT=YOUR_REP_QUERY_N
AME:::P10_USERNAME:MYUSER
2/ try to use the Default layout first to check your
report query really returns the data when called
3/ if you defined a header in your rtf template check
there is no & (ampersand) - if using & in the header
and preview the template from word it displays data
OK, but if you use this template in the report query
it fails to render the data (bug in Apex-> Bi
Publisher integration maybe?)
4/ If using the table in the rtf template check its
width does not overflow the page margins - there is a
problem with pdf export
5/ check
/oc4j/j2ee/home/application-deployments/xmlpserver/app
lication.log forthe information on BI Publisher runs
RadoIssue was in the APEX page having issues.. I recoded a new page and am able to generate BI Publisher based PDF files..
Thank you,
Tony Miller
UTMB/EHN

SQL Query problem (PL/SQL function returning SQl query)

I am using 3.1.2 Apex. When I create the region source with the following code.
DECLARE
l_sql VARCHAR2(32767);
X1 VARCHAR2(9);
X2 VARCHAR2(9);
X3 VARCHAR2(9);
X4 VARCHAR2(9);
X5 VARCHAR2(9);
X6 VARCHAR2(9);
X7 VARCHAR2(9);
X8 VARCHAR2(9);
BEGIN
SELECT decode(:P3_FAILED_CDD,'0','0','1','1', '2','2' ) INTO X2
FROM DUAL;
SELECT decode(:P3_Order_status,'J','J','1','1','2') INTO X3
FROM DUAL;
SELECT decode(:P3_FAILED_STAGE,'0','0','1','1','2') INTO X4
FROM DUAL;
SELECT decode(:P3_ORDER_TYPE,'TYPE1','TYPE1','TYPE2','TYPE2','2') INTO X5
FROM DUAL;
SELECT decode(:P3_INCLUDE_SFIN,'NO','NO','YES','YES') INTO X6
FROM DUAL;
SELECT decode(:P3_CDD_MATCH,'0','0','1','1', '2','2' ) INTO X7
FROM DUAL;
SELECT decode(:P3_FIELD,'0','0','1','1', '2','2' ) INTO X8
FROM DUAL;
l_sql := 'SELECT
ORDER_NR,
FNN,
ST,
SOT,
STAGE,
CUST_NAME,
STG_DAYS,
ZONE,
P1.OWNER,
QUEUE_A,
STG_LFD,
LFD_LEFT,
CIJ_FLAG,
FST_FLAG,
CCD_COUNT,
TCD_COUNT,
LATEST_RET_CODE,
CRD,
CDD_DATE,
CRD_LEFT CDD_LEFT,
TCD_DATE RTCD_DATE,
PROP_TCD_DATE TCD_DATE,
PROJECT_ID,
APPLN_TBO,
CO_ORD_ID,
CON_WSTN,
P1.STATE,
A_DTB,
B_DTB,
DESIGN_NO,
CREATE_DATE,
DATE_APPLN,
CUSTOMER_ID,
SALES_QUEUE,
TRACKING_NR,
WORK_REQUIRED,
SFIN_STAGE_ENTERED_DATE,
APPLN_CONTACT_OFFICER,
A_LOCATION_ADDRESS,
B_LOCATION_ADDRESS,
SO_CREATE_USERID,
OP_SEP,
WMC_CODE
FROM RASS_TICKET_VIEW P1
WHERE WMC_CODE like :p3_wmc_code
AND ST in (SELECT SYSTEM_ID from PRDRF where PRODUCT_CATEGORY like :p3_product_cat)';
IF X2 = '0' then
l_sql := l_sql || ' and CRD_LEFT < 0';
END IF;
IF X2 = '1' then
l_sql := l_sql || ' and CRD_LEFT >= 0';
END IF;
IF X3 = 'J' then
l_sql := l_sql || ' and CIJ_FLAG = ''J''';
END IF;
IF X3 = '1' then
l_sql := l_sql || ' and CIJ_FLAG is null';
END IF;
IF X4 = '0' then
l_sql := l_sql || ' and LFD_LEFT < 0';
END IF;
IF X4 = '1' then
l_sql := l_sql || ' and LFD_LEFT >= 0';
END IF;
IF X5 = 'TYPE1' then
l_sql := l_sql || ' and SOT in (''NEW'',''NET'',''ERT'',''UGP'')';
END IF;
IF X5 = 'TYPE2' then
l_sql := l_sql || ' and SOT not in (''NEW'',''NET'',''ERT'',''UGP'')';
END IF;
IF X6 = 'NO' then
l_sql := l_sql || ' and STAGE in (''DSAL'',''DPLO'',''OISS'',''TRPB'',''OTST'',''TEQP'',''DSPS'')';
END IF;
IF X7 = '0' then
l_sql := l_sql || ' and PROP_TCD_DATE <= CDD_DATE';
END IF;
IF X7 = '1' then
l_sql := l_sql || ' and PROP_TCD_DATE > CDD_DATE';
END IF;
RETURN l_sql;
END;
The query returns data.
If I add some more code just after the where clause.
AND decode(CUST_CODE,'TW','TW','RET') like (select decode(OPS_SEP,'TS','%',OPS_SEP) from T_U_CDW_BU_OP_SEP where upper(USER_ID) = upper(:APP_USER))
The query just stops working and no error message is returned.
I thought there was an issue prior to version 3.1.2 that was fixed in version 3.1.2
Othwerwise is there a better way to write the code? As I have 7 radio btn's that control the condition within the where clause.
Thanks
Ron

>
bug in APEX 3.0
>
Are you sure?
Do as Paul has suggested and post the code that doesn't work (including your extra line) using the {noformat}{noformat} tags +exactly+ as you had it in the region source.
Cheers
Ben

Plugin with PL SQL function returning query

Hi all,
I have created plugin using SQL query many times. But can we create a plugin from scratch using PL SQL function returning SQL query? Any ideas or sample.
Thanks
Sunil Bhatia

Hi Scott,
By this i mean, i have created a region type plugin for integrating jqx Grid into oracle apex. This takes input parameter as SQL statement, and creates jqx grid for me on page. Now my question is, can i do this using PL SQL function returning SQL, because when i try to give return statement, plugin gives error "SQL statement mandatory'. I hope i am clear enough now.
Thanks
Sunil Bhatia

Using 'Function Returning SQL Query' with Flash charts

I have created a pl/sql function that returns a SQL query as a varchar2 of this form:
select null link
<x value> value
<Series1 y value> Series 1 Label
<Series2 y value> Series 2 Label
<Series3 y value> Series 3 Label
from tablea a
join tableb b
on a.col = b.col
order by <x value>
If I now call the function from a Flash Chart Series SQL box with the Query Source Type set to 'Function Returning SQL Query' like this:
return functionname(to_date('30-sep-2010', 'dd-mon-yyyy'))
it parses correctly and the page is saved; however, when I run the page I don't get any output - nor any error messages or other indication of a problem.
Now, if I call the function in a SQL client, capture the SQL query output using dbms_output and paste that into the Flash Chart Series SQL box - changing the Query Source Type to SQL Query - and save the page it works fine when I run it and returns a multi-series flash chart.
Can anyone suggest either;
1. What have I might have missed or done wrong?
2. Any way to usefully diagnose the problem...
I have tried using the Apex debugger - which is very nice, by the way - but it doesn't provide any info on what my problem might be. I even tried writing my own debug messages from my function using the apex_debug_message package - got nothing...
Thanks,
Eric

Hi Eric,
Try expressing the source as this:
begin
return functionname(to_date('30-sep-2010', 'dd-mon-yyyy'));
end;That works fine for me, and if I take out the begin-end and the trailing semicolon from the return statement I get the same behavior as you.
It does mention in the help for the source (only during the wizard though) that this source type has to be expressed that way, but I agree it would be helpful if the tool would validate for this format when 'Function Returning SQL Query' is used or give some sort of indication of the trouble. Anyway, this should get you going again.
Hope this helps,
John
If you find this information useful, please remember to mark the post "helpful" or "correct" so that others may benefit as well.

PL/SQL function returning a colon delimited list of headings

Hello,
Apex version 4.1.0.23. I am editing an existing classic report which has the column heading option set to 'PL/SQL function returning a colon delimited list of headings'. I have been looking for some time but I cannot find where this PL/SQL function is defined. Can any one point me to the right direction? I do not see anything in the documentation either.
Thanks,
Usman

Hi Usman,
I looked into this issue and found that there's some JavaScript code executed when opening the page with the PL/SQL headings option enabled, or when selecting that option after loading the page, and this JavaScript attempts to set a background color for the column heading fields. Since we only display attributes for up to 100 columns, this JavaScript fails once you have more than 100 columns.
I would certainly agree with Tony that 60 or 100 columns are a bit much. But there should be some indication why something is not working, even if it's only a message stating that there's only a certain number of columns supported. So I'll log a bug to improve this in APEX 5.0.
Thanks,
Marc

Interactive Report based on a function returning SQL query?

Hi guys!
I'm wondering if the IR based on a function returning SQL query will be available on the final release of APEX 4.0..I can't see this functionality in EA1 and EA2 and I think it should be there..dont you think?
With regards,
PsmakR

Hi!
You're absolutely sure you're talking about the Interactive Report region and not about the default SQL Report region ?
With regards,
PsmakR

How to return less than 4000 characters from pl/sql function in SQL call?

Hello,
Is there a way to limit length for varchar when calling pl/sql function from SQL? No matter how I write it it always returns 4000 bytes.
If there is none, then does it make sense ever to specify lenght of the return variable?
My goal is to encapsulate business rules within pl/sql functions. But if all varchar columns are returned as 4000 it is not feasible solution. Not only this is a performance issue in a data warehousing environment, bet when using those rules within SQL views user experiance would suffer as well. Are we left with the rule hardcoding solution? Also, I think that using SUBSTRING or TRUNC functions on top of business rules function defeats the purpose.
Please see my attempt below. Your thoughts are appreciated.
Thank you.
/* Formatted on 06/11/2009 2:26:41 PM (QP5 v5.126.903.23003) */
CREATE OR REPLACE FUNCTION mytest (myvar_in VARCHAR2)
RETURN VARCHAR2
AS
l_return VARCHAR2 (15);
BEGIN
l_return := 'TEST_' || myvar_in;
RETURN l_return;
END mytest;
CREATE TABLE TEST_ME
AS
SELECT mytest ('ME') AS VERYLONG FROM DUAL;
describe TEST_ME;
RUN ABOVE CODE:
Function created.
Table created.
TABLE TEST_ME
Name Null? Type
VERYLONG VARCHAR2(4000)
Edited by: Ilmars2 on Jun 11, 2009 2:46 PM

Pointless,
Thanks for jumping in on this and I am glad you asked :).
I do not doubt that it is an architectural challenge. Otherwise it would have been done already! I am struggling with the fact that SQL knows what data type the function will return, but does not know the length of it, precision or scale. I will leave it at that.
I will go with some high level requirements to allow for alternative thoughts:
1)     Business defined rules. There are multiple types of business rules. Simple lookups, bucketing, complex calculations, data retrieved from other tables etc. We have about 500 different rules. Some of them are even overloaded – different inputs will produce the same output.
Some simple examples are:
Rule1 - Fruit
     when ‘A’ then ‘Apple’
     When ‘O’ then ‘Orange’
     Else ‘N/A’ end
Rule2 – Bonus
     when STATUS =’Active’ and LEVEL=’CEO’ then bonus=salary*1.0
     when STATUS =’Active’ and LEVEL=’nobody’ then bonus=salary*0.01
     else bonus=0
Rule 3 – Income Bracket
     When more than 0 and less or equal to 30000 then INC_B=’LOW’
     When more than 30000 and less of equal to 60000 then INC_B=’MIDDLE’
Etc.
2)     Challenge: All data users in an organization need to use the same rules (let’s assume data source is Oracle database). How to expose all the rules to different types of users in manageable way? Types of users – analysts, application/web developers, data warehouse teams etc.
3)     Current system: Not only each user has coded their own rules (luckily based on the common specification), but hard-coding is taking place for each query within the confines of one project. The project I just looked at had about 12 modules with 30 hardcoded queries. Oops! Few rules just changed.
My take: I was leaning toward encapsulating business logic within UDF’s. UDF’s provide all the flexibility we need + overloading. All the functions could be consumed by data warehouse team (building summary tables, cubes etc.) and application developers. For power users we could build views by applying the same functions on top of the source data. Thus avoid data duplication. It seemed win-win until this 4000 issue :).
Your thoughts on alternative approaches are appreciated.
Thank you.

PL/SQL function returning a SQL Query

Is this only availabe in HTML db or in 10g in general? Where do I find more about this feature?
Thanks in advance,
Denes

Not sure what you mean. HTML DB allows to use a PL/SQL function returning a valid SQL query in report regions.
Its just a PL/SQL function returning a string, outside of HTML DB, I guess you can use it wherever it makes sense.

PL/SQL: Function returned without value in authentication schemes

Hi all,
finally i did the authentication shemes based on my function and my own table ,thank you all for help :-) ,but now when i enter
1-correct user name &wrong password <it is gonna work,the authentication workin fine >
i am gonna get <Invalid Login Credentials> which is right in case of wrong login
2-wrong user name &wrong password <it is not gonna work>
3-wrong user name &correct password <it not gonna work>
in case of not working i am getting the following error:
ORA-06503: PL/SQL: Function returned without value
Error ERR-10460 Unable to run authentication credential check function.
any help to solve this issue so that it will display <Invalid Login Credentials>
in all cases of invalid login
thanks in advance ,
Ahmed,

scott,you efforts was useful and i beleive that the error that i am getting it is from the function that i have can you please take a look on :
FUNCTION CHECK_USER
( P_USERNAME IN varchar2,
P_PASSWORD IN varchar2)
RETURN boolean
IS
BEGIN
for c1 in (select user_name, password from vms2_employee_details where user_name = P_USERNAME)
loop
if P_PASSWORD = c1.password then
return true;
------dbms_output.put_line('the return from the function is true');
else
return false;
----dbms_output.put_line('the return from the function is false');
end if;
end loop;
EXCEPTION
WHEN no_data_found THEN
return false;
when others then
return false;
----dbms_output.put_line('the return from the function is false');
END;
and tell me what do you think ,
thanks,
ahmed

Conditional display of region with PL/SQL function returning SQL query

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