DataTable with dynamic columns

Does somebody have an example of how to code a h:dataTable with dynamic columns? I have seen hints about how to do it in these two articles:
http://forum.java.sun.com/thread.jspa?forumID=427&threadID=5218508
http://forum.java.sun.com/thread.jspa?threadID=577589&messageID=2909047
but a complete working example would be really helpful.
I think the key is understanding the "binding" parameter to h:dataTable but I'm having a hard time understanding it. Thanks.

I found it here:
http://balusc.blogspot.com/2006/06/using-datatables.html#PopulateDatatable

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How to create dynamic DataTable with dynamic header/column in JSF?

Hello everyone,
I am having problem of programmatically create multiple DataTables which have different number of column? In my JSF page, I should implement a navigation table and a data table. The navigation table displays the links of all tables in the database so that the data table will load the data when the user click any link in navigation table. I have gone through [BalusC's post|http://balusc.blogspot.com/2006/06/using-datatables.html#PopulateDynamicDatatable] and I found that the section "populate dynamic datatable" does show me some hints. In his code,
// Iterate over columns.
        for (int i = 0; i < dynamicList.get(0).size(); i++) {
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output.setValueExpression("value",
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I suppose the Getter method is only called once when the JSF page is loaded for the first time. By calling this Getter, columns are dynamically added to the table. However in my particular case, the dynamic list is not known until the user choose to view a table. That means I can not call loadDynamicList() in the Getter method. Subsequently, I can not execute the for loop in method "populateDynamicDataTable()".
So, how can I implement a real dynamic datatable with dynamic columns, or in other words, a dynamic table that can load data from different data tables (different number of columns) in the database at run-time?
Many thanks for any help in advance.

flyeminent wrote:
However in my particular case, the dynamic list is not known until the user choose to view a table. Then move the call from the getter to the bean's action method.

Importing From Flat File with Dynamic Columns

HI
I am using ssis 2008,i have folder in which I have Four(4) “.txt” files each file will have 2 columns(ID, NAME). I loaded 4
files in one destination, but today I receive one more “.txt” file here we have 3 columns (ID, NAME, JOB) how can I get a message new column will receive in source. And how can I create in extra column in my destination table dynamically …please help me

Hi Sasidhar,
You need a Script Task to read the names and number of columns in the first row of the flat file each time and store it in a variable, then create a staging table dynamically based on this variable and modify the destination table definition if one ore more
new columns need to be added, and then use the staging table to load the destination table. I am afraid there is no available working script for your scenario, and you need some .NET coding experience to achieve your goal. Here is an example you can refer
to:
http://www.citagus.com/citagus/blog/importing-from-flat-file-with-dynamic-columns/
Regards,
Mike Yin
TechNet Community Support

Creating Query with dynamic columns to show results

Hi experts,
I need to know how to create a query with dynamic columns. Meaning, I don't want to create a query with fixed columns representing the 12 periods of the fiscal year to show me actuals as the fiscal year proceeds.
For example, if I am currently in the middle of period 3 (March) of a fiscal year, when I execute the query, I need it to automatically only show me the 'Actuals' for periods 1 and 2, without seeing the columns from periods 3 to 12 showing blank.
Then when I am in the middle period 5 (May) the query should ONLY show me the columns for periods 1 to 4 'Actuals', no results should be shown for periods 5 to 12 yet, and I don't want to even see blank columns for period 6 to 12.
How do I define my columns, to achieve this.
Maximum points will be awarded.
Thanks Everyone.

Hi Josh,
I'm having a little difficuluty understanding what should be included in my restricted key figures.
The time characteristics that I have available to use are:
0FISCPER3 (posting period)
0FISCYEAR (fiscal year), currently using SAP EXIT to default current fiscal year.
0FISCVARNT (fiscal year variant).
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Value type (10)
version (currently I'm using variable for it)
Currency type (020)
Currency (USD).
Can you explain what my restricted key figure should be based on and how it should look.
I tried to create a restircted key figure using 0AMOUNT, and 0FISCPER3. For 0FISCPER3 I created a range from 1 to previous period (using SAP EXIT that supplied previous period).I also had value type, version, currency type, and currency included in that restricted key figure.Then when I tried to drag 0FISCPER3 under the restricted key figure once again, it wouldn't let me, probably because I've already used 0FISCPER3 in the restricted key figure.
Please let me know if my explanation is not clear.
Your step by step help would be great.
Thanks
Edited by: Ehab Mansour on Sep 23, 2008 2:40 PM

Logic to upload file with dynamic columns

hi
in my requirement i hav given to add logic to upload file with dynamic columns so that this upload program can be reused.
this way the program is flexible, irrespective of the number of columns in the file.
can any one explain this?
and let me know what actually i hav to do.

Check the program and the dynamic column is in the col_pos internal table and in the routines get_structure onwards.
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/scm/dynamic%2bstructures%2band%2bcomponents
cheers
Aveek

Difficult to achive the report layout with dynamic column names

I have a report layout as below.
So here the column names are dynamic.And each fixed row group has different calculations. I have a date parameter. If I select July 2013, then I need to show data from July 2012 to July 2013 with Columns(Jul-12, Aug-12...Jul-13). How to achive below layout
with dynamic columns?

Hi Sarayu_CM,
According to your description, you want to filter the records of prior year based on only one parameter selection. Right?
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Default Values based on the first parameter selection. Use the expression below:
=DateAdd("m",-12,FormatDateTime(Parameters!param1.Value))
Then we just need to apply a filter on the matrix/dataset to get the records which the date is between values in these two parameters.
If you have any question, please feel free to ask.
Best Regards,
Simon Hou

DataGrid with dynamic columns & renderers

I'm developing using Flash Builder 4 & Flex SDK 4.1.
I need to manage very dynamic DataGrid components and keep their definitions, which are all part of a complex item renderer of an Offers list.
The objects structure is simplified as follows -
Data: Model --> Offers ArrayCollection --> Offer VO --> DataGrid data ArrayCollection & DataGrid columns Array
View: List --> Offer Item Renderer --> DataGrid
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I tried to bind it to the source property of an ArrayCollection that would keep my columns definitions, but it didn't really work (mainly header display bugs).
What is the recommended way to keep the dynamic columns definition of a DataGrid?
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The columns got a custom header renderer that includes an icon when there are properties.
The header renderers got 4 main states (NotSelectedWithProperties, SelectedWithProperties, NotSelectedWithoutProperties & SelectedWithoutProperties).
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Any thoughts on the subject?
3. Anyway, I ended up recreating the DataGrid's columns Array very often (copying the columns definition on the offer's item renderer's dataChange event handler).
Note that the dynamic properties can be edited when the column is selected and I copy their values from the view back to the model when entering the state NotSelectedWithProperties.
This feels way too complicated and I really try to keep it simple, inspite of the required complexity.
Does anyone have better ideas?
4. In some cases the column's item renderer should also be modified into another DataGrid (grid-in-grid).
I used the MXDataGridItemRenderer with a DataGrid and included an ArrayCollection for the "newValue" returned by the editor.
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When needed, I loop though the data objects of the parent DataGrid and populate the related field with an ArrayCollection of key-value objects that are displayed on the internal DataGrid.
After adding this feature I encounter very strange bugs -
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ArgumentError. Error #2025: The supplied DisplayObject must be a child of the caller.
at flash.display::DisplayObjectContainer/setChildIndex()
at mx.core::UIComponent/setChildIndex().......6993....
All I could find about this is that it might be related to some context error or something, but I'm really stuck on this one.
b. Sometimes another column might copy value from one row to another, running over the previous value.
I'm not sure exactly what sequence of actions causes this behavior, but it's related to that itemRenderer for sure.
c. Switching places with a column that uses the grid item renderer (headerShift) causes a stak overflow of StyleManager that tried to get style from the DataGridItemRenderer. This one I just found out, but couldn't reproduce a second time... strange!
I'm pretty sure this caused another problem that I don't remember at the moment.
The bottom line is that there got to be a better way to implement this feature within this already-complicated environment.
Maybe I'm doing something very wrong here...
Please advice and thanks for reading all this.

Update on item 4a -
This was a major issue (the main reason for opening this thread really) and I managed to resolve it!
As part of my application, I override the default DataGrid behavior for column selection (headerRelease event).
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At first I did this by setting styles, but the look didn't refresh unless I created a new instance of the header renderer.
Later I changed thi behavior to work with states, but I left the new header renderer instance creation commands and those lines created all the mess!
Conclusion -
If you define a custom header renderer for your datagrid column and then a custom item renderer, don't create a new instance of your header renderer!
It would still be nice to get some response for the other issues I raised.
Thanks and have a nice week.

Problem with dynamic column in SBWP

Hi Friends,
In SWL1 I have created two attributes with header as "CANCELLED" and " DESCRIPTION" for a particular task.But my SBWP is still showing columns as "Dynamic column" for the workitems of that task.
Please help me on this.
Thanks.
Dilip

Hi Dilip,
The column headings will only appear in the task-specific view. In other words, by default the headers will be generic because you can have mixed tasks in the worklist, and column 1 can be a date for one task and a company name for another.
The user needs to expand the tree on the left hand side and navigate to the "Approve Purchase Order" (or whatever) node to show only items of that task, then column headers should show up.
Regards,
Mike

Problem with dynamic columns in smartforms.

Dear SDN Experts,
I have a requirement in smartforms for dynamic columns.
i have used template with 10 columns, So from these 10 columns,Columns may vary monthly MIN 2 to MAX 10 depending on
readings with them for that month.
i cannot fix column headings also,Because headings also changes dynamically.
So Problem is if there is no data in columns,Columns is displayng empty.
For EX: In this month i have 2 columns data remaining all columns is displaying empty boxes.
Please suggest me a solution is this posible in smartforms if i use table also.
<removed by moderator>
Regrds,
MNR
Edited by: Thomas Zloch on Sep 11, 2011 3:50 PM

Hi friend,
See the link below it is having the solution of hiding the columns in smart forms
Hide table columns in smart form?
Create a table to display your values with 12 col and hide the columns based on the idea provided in the link above.
I think this will solve your issue if you still have queries please revert back to me i will help you.
Thanks,
Sri Hari

GoNav function with dynamic columns 10g

Hi,
I have a report with a dashboard prompt that dynamic change the report column. The result of this prompt is set into a presentation variable @{dimension}.
Now I want to use the GoNav function on the column that dynamically changes.
The data format for this column should be:
@[html]"<font class="Nav" onclick=\"javaScript:GoNav(event, '/users/Administrator/Test', 'Department', 'Department_name' ,'"@"','_self');\">"@"".
But this syntax only works for the column Department.Department_name. If the prompt on the dashboard is changed to another column the navigate link doesn't work anymore.
Is there a solution to make this work so that also the column can be set dynamically for the navigation?

I have a report with a dashboard prompt that dynamic change the report column. The result of this prompt is set into a presentation variable @{dimension}.
Now I want to use the GoNav function on the column that dynamically changes.
The data format for this column should be:
@[html]"<font class="Nav" onclick=\"javaScript:GoNav(event, '/users/Administrator/Test', 'Department', 'Department_name' ,'"@"','_self');\">"@"".
But this syntax only works for the column Department.Department_name. If the prompt on the dashboard is changed to another column the navigate link doesn't work anymore.
As per your comments above you are using Column selector kind of functionality using a Dashboard prompt and in your GO nav you are taking column Department that's way it is working for that column only , if you change the Column in Dashboard prompt also still GO nav point to Department column only...make the GO NAV to take dynamic columns..
I am not sure whether we can pass presentation variable .....with my knowledge its not..use GO URL instead of GO NAV

Form with dynamic Column Names

Hello,
I am using "Form with report on table" and I would like to make use of dynamic column names labels that are derived from another table (sql). I am stuck on how to do this, any advice?

Hi FourEyes;
Try using this.
Select Col1, Col2, Col3
into :P1_Field1, :P1_Field2, :P1_Field3
from Your_Table
Where (your conditions);

Pivot Table with Dynamic Columns and Headers

Hello,
I'm trying to pivot a table of data where the column headers will be dynamic. While I know how to pivot the table to get what I want how will I be able to pick up the table column header from the Pivot to display in the report?
For example:
Unpivoted data is Employee Code, Branch Code, Problem Code, # of Problems.
There is many records for a given Employee and Branch that I want to pivot so the Column headers are the Problem Codes and the data below is the SUM(num_problems) for that Problem.
So the data may look like this for Tech Bob, Branch NY.
Problem = LEAK, Num_problem = 5
Problem = DAMAGE, Num_problem = 2
Problem = OTHER, Num_problem = 3
Which problem codes may appear is unknown but selecting the DISTINCT(problem) across all techs gives me the column headings to use.
So if I pivot this data, I get this Row:
Tech = Bob, Branch = NY, DAMAGE = 2, LEAK = 5, OTHER = 3
So first can SSRS handle having dynamic columns? Only Tech and Branch are known and the remaining columns are dynamic based on how many Problems they worked on.
Second, how can I set the column heading in my Tablix to be the Problem Code?
Sherry

You just need to use a matrix container
Use EmployeeCode and BranchCode for row group
ProblemCode as column group and SUM([No Of Problems]) as the data expression and it will generate the columns for you based on ProblemCode values automatically.
See an example here
Sample Matrix
Please Mark This As Answer if it solved your issue
Please Vote This As Helpful if it helps to solve your issue
Visakh
My MSDN Page
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View with dynamic columns

Hello.
I'm sure this must be a FAQ but can't find it anywhere.
I'm collecting data from people in a questionnaire style but don't know what/how many questions there are. I need to create a view that displays responses to each of the questions as a view, as follows:
Name | Company | Favourite Colour | Age Range | Favourite Food
In this example, there are three 'dynamic' questions. The data is stored as follows:
People - basic information about the respondents
Questions - the names of the questions being asked
Choices - the options that can be chosen from for each question
Responses - the answers that people provide.
If I know exactly what questions there are, then I can JOIN to the questions table the appropriate number of times. But I don't! Can this be done without dynamic SQL?
Very many thanks for help.
Simplified tables and data follow:
CREATE TABLE [People](
[ID] [int] NULL,
[Name] [varchar](50) NULL,
[Company] [varchar](50) NULL
) ON [PRIMARY]
GO
CREATE TABLE [Questions](
[ID] [int] NULL,
[QuestionName] [varchar](50) NULL
) ON [PRIMARY]
GO
CREATE TABLE [Choices](
[ID] [int] NULL,
[QuestionID] [int] NULL,
[ChoiceName] [varchar](50) NULL
) ON [PRIMARY]
GO
CREATE TABLE [Responses](
[ID] [int] NULL,
[PersonID] [int] NULL,
[QuestionID] [int] NULL,
[ChoiceID] [int] NULL,
[OtherText] [varchar](50) NULL
) ON [PRIMARY]
GO
INSERT [People] ([ID], [Name], [Company]) VALUES (1, N'Ben', N'ACME')
GO
INSERT [People] ([ID], [Name], [Company]) VALUES (2, N'Dave', N'My Corp')
GO
INSERT [People] ([ID], [Name], [Company]) VALUES (3, N'Sarah', N'Newco')
GO
INSERT [Questions] ([ID], [QuestionName]) VALUES (1, N'FavouriteColour')
GO
INSERT [Questions] ([ID], [QuestionName]) VALUES (2, N'AgeRange')
GO
INSERT [Questions] ([ID], [QuestionName]) VALUES (3, N'FavouriteFood')
GO
INSERT [Choices] ([ID], [QuestionID], [ChoiceName]) VALUES (1, 1, N'Red')
GO
INSERT [Choices] ([ID], [QuestionID], [ChoiceName]) VALUES (2, 1, N'Blue')
GO
INSERT [Choices] ([ID], [QuestionID], [ChoiceName]) VALUES (3, 1, N'Green')
GO
INSERT [Choices] ([ID], [QuestionID], [ChoiceName]) VALUES (4, 2, N'<18')
GO
INSERT [Choices] ([ID], [QuestionID], [ChoiceName]) VALUES (5, 2, N'18-65')
GO
INSERT [Choices] ([ID], [QuestionID], [ChoiceName]) VALUES (6, 2, N'65+')
GO
INSERT [Choices] ([ID], [QuestionID], [ChoiceName]) VALUES (7, 3, N'Pasta')
GO
INSERT [Choices] ([ID], [QuestionID], [ChoiceName]) VALUES (8, 3, N'Curry')
GO
INSERT [Choices] ([ID], [QuestionID], [ChoiceName]) VALUES (9, 3, N'Steak')
GO
INSERT [Responses] ([ID], [PersonID], [QuestionID], [ChoiceID], [OtherText]) VALUES (1, 1, 1, 1, NULL)
GO
INSERT [Responses] ([ID], [PersonID], [QuestionID], [ChoiceID], [OtherText]) VALUES (2, 1, 2, 1, NULL)
GO
INSERT [Responses] ([ID], [PersonID], [QuestionID], [ChoiceID], [OtherText]) VALUES (3, 1, 3, 2, NULL)
GO
INSERT [Responses] ([ID], [PersonID], [QuestionID], [ChoiceID], [OtherText]) VALUES (4, 2, 1, 4, NULL)
GO
INSERT [Responses] ([ID], [PersonID], [QuestionID], [ChoiceID], [OtherText]) VALUES (5, 2, 2, 5, NULL)
GO
INSERT [Responses] ([ID], [PersonID], [QuestionID], [ChoiceID], [OtherText]) VALUES (6, 2, 3, 6, NULL)
GO
INSERT [Responses] ([ID], [PersonID], [QuestionID], [ChoiceID], [OtherText]) VALUES (7, 3, 1, 7, NULL)
GO
INSERT [Responses] ([ID], [PersonID], [QuestionID], [ChoiceID], [OtherText]) VALUES (8, 3, 2, 9, NULL)
GO
INSERT [Responses] ([ID], [PersonID], [QuestionID], [ChoiceID], [OtherText]) VALUES (9, 3, 3, 9, NULL)
GO

I'm not into reporting tools, but I recall that Kalman has mentioned some component in Reporting Services that can do this. And obviously, if you receive the result set as a DataTable in .NET, you can write code to flip it.
As I said, a view or a result set in a relational database is a table that is supposed to model an enitity with a finite number of distinct attributes. For this reason, any query where the number of columns is not known until run-time has to build dynamically.
And since a relational database is not designed for handling such dynamic scenarios, all attempt to work with that dynamically generated result set will be painful.
So for the filters you mention, there are two options:
1) Filter in the database on the base tables.
2) Filter in the client on the pivoted data.
But don't get the idea to filter in SQL Server after the pivot.
If the total dataset is large, the first alternative certainly has an advantage, but else it's likely to be easier to do client side.
Erland Sommarskog, SQL Server MVP, [email protected]

How to create a report with dynamic columns

Hi all,
I am using Apex 4.0 with Oracle 10g
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example:
I have a table employee with columns name, designation, sal
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Can some one help me how we can do that.
I appreciate your answer
Thanks,
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Essentially you want to write a pl/sql function which returns a varchar2 string. The contents of the string must be a valid sql statement.
Once you have done this, you need to add a report region as type sql report and you will have the option of writing it as a query or as a function returning query. Choose function returning query and enter in the function call.
Note your function must be valid, and must be executable by your apex parsing schema.
example:
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return varchar2
is
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begin
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end test_report;Edited by: Keith Jamieson on Aug 15, 2011 4:50 PM

How to call a SP with dynamic columns and output results into a .csv file via SSIS

hi Folks, I have a challenging question here. I've created a SP called dbo.ResultsWithDynamicColumns and take one parameter of CONVERT(DATE,GETDATE()), the uniqueness of this SP is that the result does not have fixed columns as it's based on sales from previous
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Right now, on SSMS, I am able to execute this SP when supplying a parameter. What I want to achieve here is to automate this process and send the result as a .csv file and SFTP to a server.
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I've tried
EXEC xp_cmdshell ' BCP " EXEC xxxx.[dbo].[ResultsWithDynamicColumns ] @dateFrom = ''2014-01-21''" queryout "c:\path\xxxx.dat" -T -c'
SSMS gives the following error as Error = [Microsoft][SQL Server Native Client 10.0]BCP host-files must contain at least one column
any ideas?
thanks
Hui
--Currently using Reporting Service 2000; Visual Studio .NET 2003; Visual Source Safe SSIS 2008 SSAS 2008, SVN --

Hey Jakub, thanks and I did see the #temp table issue in our 2008R2. I finally figured it out in a different way... I manage to modify this dynamic SP to output results into
a physical table. This table will be dropped and recreated everytime when SP gets executed... After that, I used a SSIS pkg to output this table
to a file destination which is .csv.
The downside is that if this table structure ever gets changed, this SSIS pkg will fail or not fully reflecting the whole table. However, this won't happen often
and I can live with that at this moment.
Thanks
--Currently using Reporting Service 2000; Visual Studio .NET 2003; Visual Source Safe SSIS 2008 SSAS 2008, SVN --

DataTable with dynamic columns

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