Column Substitution in LOVs

Hi,
I have created a SQL Query (updateable report). Within this query, I have a two LOV type (Select Lists) columns.
My question is, as you would normally use column substitution within the "Link" section of a column's attributes, i.e #COL1#, is it possible to use this functionality or some other means within a LOV?
For example, if I have two select lists (LOVS), COL1, COL2, is it possible for the report row you are on to use the value of COL1 within a List of Values in COL2 columns attributes?
I need something like:
COL2 Attributes
============
select column_name d, column_name r
from user_tab_columns
where table_name = NVL(:TABLE_NM_SEL,#COL1#)
order by column_id
Any ideas/assistance would be appreciated.
Thanks.
Tony.

Tony,
You can not do it this way.
Suggestion:
1. Create your sql query using apex_item, there you may create LOV's dependant on each
other.
2. Create a table function which does the same but you have a nice sql in your report.
Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/training
http://htmldb.oracle.com/pls/otn/f?p=31517:1
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How to accessing current row report column value in Lov Query?

Hi,
which access methods (eg. bind variables, substitutions, ...) for getting the current row report column value can be used in the "Lov Query" property of a report column?
As what I know of and what I have read on the forum there are no bind variables for the report columns. For the "Link Text" property it seems that the column values exist as substitution strings (#COLUMN_NAME#). But they don't work in the Lov Query. => And would be good because of a hard parse each time the Lov query is executed.
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http://inside-apex.blogspot.com

Hi Patrick,
I agree that it's a waste to continually use Ajax to go back to the server to get the contents of a dynamic select list.
There are no bind variables for any row item - but what you do have, as per my previous post, is the value of the data entered by the user in the first row. You can pass this into your application process (using get.add("VARIABLENAME", value)), which can use it to retrieve the correct LOV in your Ajax code - this will give you a "bind variable" that your process can use.
What you could do, however, is generate hidden select lists on your page - one for each possible LOV list and replace the contents of the new row's select list with the contents of the appropriate hidden select list. This is easy to do with javascript (using innerHTML functions). Obviously, though, the usefulness of this depends on the number and size of the select lists.
Even if you don't generate them to start with, you can keep a copy of any select lists returned by Ajax in the DOM for use on new rows. So, if you have retrieved a select list, you will have a copy of it in DOM which you can then copy into the new row. If you don't have the list in DOM, use Ajax to get it, store a copy of it and copy it into the new row.
Which method you use will depend on the number/size of select lists needed. If they are few in number and/or size, I would suggest generating hidden lists. If they are large, use Ajax to get them once, store them and then retrieve them from the DOM when needed.
There is another thread here where Arie recommends going to the server every time to make sure you get the most up-to-date data for the lists. If you want to follow this advice, for this reason, use get.add("VARIABLENAME", value) to pass the value to your process. If this is not an issue, you can use one of the other methods I outlined above.
Regards
Andy

Error while associating a report column with a LOV

Hi All,
I have a region based on a SQL Report. One of the columns of this report is based upon a LOV. While running the page, i get the following error -
report error:
ORA-20001: Error fetching column value: ORA-06502: PL/SQL: numeric or value error.
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Hi Scott,
I'm also facing the same problem as Monika.
I have an LOV with the following query which returns 8774 records, when I copied and pasted those records into a text file it shows as 220KB in size.
SELECT
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p.pers_id r
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people_contacts pc
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AND     p.used_by_orc = 'Y'
AND     pc.pers_id = p.pers_id
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After searching the forum, I think there's a 32K limitation on the fetched rows in tabular forms, can you please let me know how to overcome this problem?
I'm selecting the persid in the (tabular form) SQL query updatable report.
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- Pradeep

Sorting a column according to LOV displayattribute's value?

Hi,
a quick question over an issue that probably some of you have already encountered.
How to sort an af:column in a table according to the content (displayname) of the LOV associated with the FK attribute?
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Hi,
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Untested

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Classic report:
Region source:
select status, descr, apex_item.text_from_lov(status, 'lov_status') status2
from
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30;'Status Two'
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Both column status as status2 simply keep displaying their value, and not the 'display value' i'd expect coming from the lov.
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Hi Tom,
revert the order of your LOV items ( so first description and then ID ),
like for example :
STATIC2:'Status One';15,'Status Two';30,'Status Three';45,'Status Four';60
That does the trick ( tried it ).
If you want to see an example check page 2 of the only app on apex.oracle.com
WS : bklerk
User : demo
PWD : demo123
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Hi
Using APEX 4.2 on 11g
In a tabular form I want to filter the values in a Popup Key LOV based on the value of another column (same row).
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e.g. where COL 2 is a popup LOV
COL 1
COL 2
1
LOV SQL: SELECT a FROM b WHERE c = <value from COL 1>
2
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3
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Anyone have any ideas?
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Bug: Report Column based on LOV character string buffer too small error

When using a column type of "Display as Text (based on LOV, does not save state)" with a result set that is rather large causes a character or string buffer too small oracle error.
See the below page for an example.
The example page below has a single report off a table called "HUGE_TABLE" which has two columns: display and code
Code contains a number between 0 and 100000.
Display contains the number in code appended to a block of text.
When I display the report with no Display As Text (based on LOV does not save state) it displays fine.
If I make the "Code" column display as text based on LOV and make the LOV
"SELECT display, code FROM huge_table"
I get the error you see on the page.
http://apex.oracle.com/pls/otn/f?p=32149:1
Thanks.

Thanks for your help Scott.
So from what I've gathered from my own tests and the discussions you linked me to the LOVs based on SQL queries are being converted into "static LOV" strings before being used.
As such they are limited to the PL/SQL VARCHAR2 max size of 32767
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Which is where your SUM( LENGTH( display ) + LENGTH( return ) + 2 ) comes in.
In short, if:
sum( length( display ) + length( return ) + 2 ) + 7 > 32767
would evaluate to true then you have a problem. :)
I'll use this to track down my problems and switch them over to inline queries.
Thanks.
Cheers,
Joe

Urgent - Report Column based on LOV - Value not found in LOV

Hi All,
Recently, we have upgraded to HTMLDB 2.0 from HTMLDB 1.5.
I have a SQL report. One of the columns is based upon LOV - Display as Text (Based on LOV, does not save state).
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Before upgrade, it was working fine.
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Thanks in advance,
Monika

Hi,
Can anybody help me in sorting out this issue please.
For your reference, i have made a test case on
http://apex.oracle.com/pls/otn/f?p=20451:4:3519837362944582:::::
Here, there are 2 tables
1. MY_EMP_COUNTRY(emoid, empname, cntry_id)
2. MY_COUNTRY_LOOKUP(id, name,active)
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select name d, id r
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select empname, cntry_id
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Sorting report by column based on LOV problem...

All,
I have an issue with a report I have written.
I have an LOV based on a sql where which returns an ID as a return value and a CODE as a display value.
Lets say the LOV returns the following results:
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1, V
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Chris,
This didn't change in 3.1 and that is definitely not a bug but a feature. The solution I
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Denes Kubicek
http://deneskubicek.blogspot.com/
http://www.opal-consulting.de/apex/f?p=107:7
http://htmldb.oracle.com/pls/otn/f?p=31517:1
-------------------------------------------------------------------

Another shortcoming in BIP: Can show only 1 column in an LOV.

<h1>Another thing I noticed: In BIP LOVs cannot show the 2 columns that Oracle Reports shows. Please see below image comparing the 2 situs.</h1>
!http://img59.imageshack.us/img59/1636/lov2colproblem.gif!
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There are two options.
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Multiple displayed columns in an LOV

Hi,
Does anyone know if it is possible to have an LOV with more than 1 column of information being displayed?
Thanks, Larry

If you are only interested in displaying the columns you can always do it by creating the following query
select value_column, column1| |' '| |column2| |' '| |column3 display_column from tablename
this will give you multiple values in display column eg.
select 'gsmith' username, 'Gregory'| |' '| |'Smith' fullname from dual;
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<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Larry Vivolo ([email protected]):
Hi,
Does anyone know if it is possible to have an LOV with more than 1 column of information being displayed?
Thanks, Larry<HR></BLOCKQUOTE>
null

Maximum number of columns allowed in LOV

I have some technical doubts
1)What is the maximum number a lov allows?
2)Maximum length of record group query?
3)Maximum number of items assigned using LOV?
Please reply immediate
Thanks in advance
Manoj M

I have some technical doubts
1)What is the maximum number a lov allows?i doubt for this it also takes 20 values as per my knowledge in oracle apps
2)Maximum length of record group query?a meaningful query in record group up to unlimited extent will be accepted
3)Maximum number of items assigned using LOV? by taking a parameter you can assign the same lov to different items
>
Please reply immediate
Thanks in advance
Manoj M

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