Custom Transform Component, Change Type Or Add Output Column

Jun 26, 2006

Would anyone happen to have any pointers or know of any good code examples to either programmatically change the type of an input column when it is passed through the component, or add a new column to the output? I am extracting data from an Oracle database which is in Julian date format (represented within SSIS as a DT_NUMERIC column) and I need to to either transform the input column holding it into a date column, or to dynamically add a new output column holding the transformed data.

Many thanks

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Integration Services :: Custom Source Component - No Datatype Set When User Add Output Column

Aug 17, 2015

I'm writing a custom source component that reads data from a SharePoint list with dynamic mapping to output columns. It's my first custom component and it's based on several samples and tutorials from Internet

Output columns are not created by the component itself, they must be added by user at design time. The component makes dynamically an association between SharePoint fields and available output columns at run-time (based on an mapping table).

I made a very basic skeleton and I encounter a problem when I add a column to output: it has no datatype and when I try to set one I have an the error Property value is not valid, The component xxxxxx does not allow setting output column datatype properties.

Imports System
Imports Microsoft.SqlServer.Dts.Pipeline
Imports Microsoft.SqlServer.Dts.Pipeline.Wrapper
Imports Microsoft.SqlServer.Dts.Runtime.Wrapper
<DtsPipelineComponent(ComponentType:=ComponentType.SourceAdapter,
DisplayName:="SharePoint Dynamic Assoc List Source",

[Code] ....

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Error OutPut In Custom Source Component

May 11, 2006

For the Custome source Component ErrorOutput, should I go for asynchronous / synchronous Output.

If i go for synchronous output

// Create the error output.
IDTSOutput90 errorOutput = ComponentMetaData.OutputCollection.New();
errorOutput.IsErrorOut = true;
errorOutput.Name = "ErrorOutput";
errorOutput.SynchronousInputID = What Id is required here;
errorOutput.ExclusionGroup = 1;


Is it the IDTSOutput90 InPut.ID / OutPut.ID which should be assigned.

Thanks Regards

Anil

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Adding Error Output To Custom Source Component

Dec 6, 2007

Hi all,
I saw a couple of other posts here on this topic, but none quite got to my issue.
I'm trying to add error output to a custom source component (not a script, a custom component). The samples all seem to deal with transform components, and my issues seem to be unique to source components.

I have the following code related to error handling ...

Public Overloads Overrides Sub ProvideComponentProperties()

...

Dim output As IDTSOutput90 = ComponentMetaData.OutputCollection.New

output.Name = OUTPUTCOLUMNNAME


output.ExternalMetadataColumnCollection.IsUsed = True

ComponentMetaData.UsesDispositions = True

output.ErrorRowDisposition = DTSRowDisposition.RD_NotUsed

output.ErrorOrTruncationOperation = "Something got truncated or blew up"

Dim errorOutput As IDTSOutput90 = ComponentMetaData.OutputCollection.New

errorOutput.Name = ERRORCOLUMNNAME

errorOutput.IsErrorOut = True

...
End Sub


Public Overloads Overrides Sub ReinitializeMetaData()


Dim output As IDTSOutput90 = ComponentMetaData.OutputCollection(OUTPUTCOLUMNNAME)

Dim outColumn As IDTSOutputColumn90 = output.OutputColumnCollection.New


outColumn.Name = strName

outColumn.SetDataTypeProperties(DataType.DT_I4, 0, 0, 0, 0)



Dim metadataColumn As IDTSExternalMetadataColumn90 = output.ExternalMetadataColumnCollection.New


metadataColumn.Name = outColumn.Name

metadataColumn.DataType = outColumn.DataType

metadataColumn.Precision = outColumn.Precision

metadataColumn.Length = outColumn.Length

metadataColumn.Scale = outColumn.Scale

metadataColumn.CodePage = outColumn.CodePage

outColumn.ExternalMetadataColumnID = metadataColumn.ID


outColumn.ErrorRowDisposition = DTSRowDisposition.RD_NotUsed

outColumn.ErrorOrTruncationOperation = "Something Truncated!"

outColumn.TruncationRowDisposition = DTSRowDisposition.RD_NotUsed

Dim errorOutput As IDTSOutput90 = ComponentMetaData.OutputCollection(ERRORCOLUMNNAME)

Dim errorColumn As IDTSOutputColumn90 = errorOutput.OutputColumnCollection.New

errorColumn.Name = outColumn.Name

errorColumn.SetDataTypeProperties(DataType.DT_I4, 0, 0, 0, 0)
...
End Sub

The confusions I have are:
a) the stock advanced properties editor (I haven't provided a custom one) doesn't seem to "realize" that I have an error output, so provides no method to configure. I am believing it would need to know which Output columns can have their error/truncation redirected. I'd have thought setting ErrorRowDisposition on my output column would have been enough to trigger this ??
b) since I don't have any means of configuring, not surprisingly, when I try to connect my error output, designer complains that, "Ths error output cannot receive any error rows. This occurs for several reasons: Input columns or output columns are not yet defined. Error handling is not supported by the component. Error handling is not configured for the component."
c) UsesDispoistions would seem to be appropriate only for a transform component

Thanks for reading, and appreciate any help or pointers.
Bill

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SSIS Custom Component, Output Buffer Problem

Mar 27, 2007

Hi Guys,

I created a SSIS custom component, transformation (Asynchronous) with one Input collection and 2 output collections.

The SSIS Package which includes the Component I created works well in the Business Intelligence Studio, but when the same Package is run in the 'Execute Package utility' It fails to run. ( when you Double click on the dtsx file)

The cause of the failiure is

public override void PrimeOutput(int outputs, int[] outputIDs, PipelineBuffer[] buffers)

method receives only one output buffer when executed using the 'Execute Package Utility' { outputs = 1 , buffer.Length = 1 } ( when executed in the BI studio, the method receives parameters of both the output buffers that I expect { outputs = 2 , buffer.Length = 2 } )

The property ComponentMetaData.OutputCollection.Count = 2 as well. Yet the PrimeOutput method provides only 1 buffer.

The Validation Succeeds on both instances, which I assume means that Meta Data is Provided Properly.


What would be the reason for the same pakage to run in 2 different ways like this,

What might I have missed out to do, to make the package run in different ways on 'Business Intelligence Studio' and 'Execute Package Utility'

Thanks a lot



Below are some of the lines from the ProvideComonentProperties Method which deals with the output Collection, Isn't this sufficient for the PrimeOutput to provide 2 output buffers?





ProvideComponentProperties()









public override void ProvideComponentProperties()
{

RemoveAllInputsOutputsAndCustomProperties();
base.RemoveAllInputsOutputsAndCustomProperties();
base.ProvideComponentProperties();

//other function calls

IDTSOutput90 output1 = ComponentMetaData.OutputCollection[0];
output1.Name = "Output1";
output1.Description = ".......................";
extracted.SynchronousInputID =0;


IDTSOutput90 output2 = ComponentMetaData.OutputCollection.New();
output2.Name = "Output2";
output2.Description = "..........................";
output2.SynchronousInputID = 0;

//other function calls
}

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Apr 17, 2006

I'm having a tad bit of trouble getting output from an asynchronous component that I've written and am looking for some insight.

This component takes in a name string passed from upstream and parses the name components into standardized output fields. I'm using an asynchronous component because if the name string contains two names ("Fred & Wilma Flintstone") I'm outputting one row for Fred and one for Wilma. I've gotten it to run and with debugging have observed what appeared to me to be proper execution, but zero rows are flowing out of it.

In my ProvideComponentProperties method, I add the three fields and there associated metadata to the OutputColumnCollection. Is this method where this should occur? It's before the PrimeOutput method, so I didn't know if I should be creating the output columns in ProcessInput (i.e., after the output buffer is provided by PrimeOutput.)

In ProcessInput, I'm using AddRow for each input row and another if it contains a second name, setting the value for each index using the buffer's SetString method, to no avail. I can observe it to this point, but then don't know what's in that output buffer (if I'm using the wrong buffer index value, etc)

Thanks.

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Aug 28, 2007



I'm trying to create a fairly simple custom transform component (because I've read that's the easiest one to create) which will take one column from a flat file source and based on the first row create the output columns.
I'm actually trying to write a component that will solve the now well known problem with parsing CSV files in SSIS. I have a lot of source files and all have many columns so a component that can read in the first line from the CSV file and create the output columns automatically will save me lots of time when migrating the old DTS packages.

I have the basic component set up but I'm stuck when trying to override the OnInputPathAttached method because I don't know how to use the inputID to get the first line from the input (the buffer).
Are there any good examples for creating output columns dynamically based on the input buffer?
Should I just give up on on the transform and create a custom source component instead?

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Feb 16, 2007

When data is imported from our legacy system, the same functions need to be applied to several columns on different tables. I want to build a kind of "Function Library", so that the functions I define can be re-used for columns in several packages.



The "Derived Column" transform seems ideal, if only I could add my list of user-defined functions to it. Basically I want to inherit from it, and add my own list of functions for the users to select.

Is this possible ?

What other approaches could I take to building about 30 re-usable functions?

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Jun 27, 2007

Hi all,



I am creating a customer data flow component for SSIS for use in a package. I've got some custom properties that I am exposing using the supplied advanced editor (no custom property editor here).



Some of my properties are enumerated types, and I have deciphered how to get those properties to show as dropdown lists of their respective enumerations. (For those of you who may be looking as hard as I did as to how to accomplish this, see the end of this post.)



I also have a few properties which request SSIS package variable names - such as an file name variable. However, I can't figure out how to tell the advanced editor that the property is looking for an SSIS variable, so that it can show a dropdown list of package variables, much like virtually any other Microsoft supplied Data Flow component can.



Is there a Type Converter I could specify for those custom properties? Is there another way to instruct SSIS that my custom property is expecting a variable? Or do I need to code a custom UI for editing my Data Flow Task?



To create a dropdown list of values for a custom property that represents an enum, do the following:

1. Create your enum definition, such as "public enum ThisIsMyEnum { one, two }"

2. Create a new class that inherits from TypeConverter, such as "public class MyEnumConverter : TypeConverter"

3. Override "CanConvertFrom", and return true if "sourceType == typeof(string)"

4. Override "CanConvertTo", and return true if "destinationType == typeof(string)"

5. Override "ConvertFrom", and return the enum value (such as "one" or "two" in my example) that corresponds to the string passed in the parameter "value"

6. Override "ConvertTo", and return a string that corresponds to the enum value passed in the parameter "value"

7. Override "GetStandardValuesSupported" and return true

8. Override "GetStandarValuesExclusive" and return true to indicate that ONLY the enum values should be accepted

9. Override "GetStandardValues", and return a new StandardValuesCollection constructed with Enum.GetValues() of your enum, such as "return new StandardValuesCollection(Enum.GetValues(typeof(ThisIsMyEnum)));"

10. Just above your "public enum" declaration, add a "TypeConverter" attribute to link your type converter to your enum, such as "[TypeConverter(typeof(MyEnumConverter))]"

11. In "ProvideComponentProperties", after you've created your custom property like this: "IDTSCustomProperty90 propEnum = ComponentMetaData.CustomPropertyCollection.New()", add another line to specify the TypeConverter property of the property to the full assembly name of your type converter, like so: "propEnum.TypeConverter = typeof(MyEnumConverter).AssemblyQualifiedName;"

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Nov 21, 2006



Wanted to enquire how this is done. Tried doing it in the setUsageType method I have overwritten but only allows description to be changed. Basically need to change "Name".

Best option would be to change it instantly when a user selects a column from the inputs in the custom component, ie. it changes the Output Alias to a desired value. (Input tab in advanced editor)

All this is being done in a custom component which I would like to be synchronous, can achieve a similar result asynchronously.

Thanks

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Thanks!
Harry

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Aug 14, 2007

This is trivial I'm sure but I'll be dogged if I can find someone who mentions how to do it. I am attempting to develop a Data Flow Transformation that appends a new column (a string value) into the current stream.

I have found plenty of references on how to replace an existing column but I'd really like to just add my new column in there. It doesn't need to be configurable, it can be a static column name. I'll take a solution that allows the column name to be set at design time, don't get me wrong but the magic I'm looking for is how to implement a new column in a stream.

Yes, I am well aware of the derived column task but I will be replacing a few hundred instances and I'd much rather just drag an item onto the designer than to drag a derived column, double click it, type in the column name, set the expression and then set the datatype, etc.

Anyone spare a moment to enlighten me?

Pardon the lack of formatting, this BB doesn't play with Opera (I know, I'm a heretic)


using System;
using System.Collections;
using System.Runtime.InteropServices;
using Microsoft.SqlServer.Dts.Pipeline;
using Microsoft.SqlServer.Dts.Pipeline.Wrapper;
using Microsoft.SqlServer.Dts.Runtime.Wrapper;
using Microsoft.SqlServer.Dts.Runtime;

namespace Microsoft.Samples.SqlServer.Dts
{
[
DtsPipelineComponent
(
DisplayName = "Nii",
Description = "This is the component that says Nii.",
ComponentType = ComponentType.Transform
)
]
public class Nii : PipelineComponent
{


public override void ProcessInput(int inputID, PipelineBuffer buffer)
{
if (!buffer.EndOfRowset)
{
while (buffer.NextRow())
{
try
{
// do something here to
}
catch (Exception e)
{
ComponentMetaData.FireInformation(0, ComponentMetaData.Name, "There was an error on row " + buffer.CurrentRow.ToString() + ". The error is: " + e.Message + " : " + e.Source + " : " + e.StackTrace, "", 0, ref fireEventAgain);
}
}
}
}
}

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Feb 9, 2006

Hi,

I am building a custom component have a IDTSCustomProperty90 property that can take the value 'True' or 'False'.

Depending on its setting, I want to include (or not include) a column in the output.

Any advice on how to go about doing this (with some sample code) would be much appreciated!

Here's how I'm declaring the property in ProvideComponentProperties()
IDTSCustomProperty90 IncludeErrorDesc =  ComponentMetaData.CustomPropertyCollection.New();
IncludeErrorDesc.ExpressionType = DTSCustomPropertyExpressionType.CPET_NONE;
IncludeErrorDesc.Name = "Some Name";
IncludeErrorDesc.TypeConverter = typeof(Boolean).AssemblyQualifiedName;
IncludeErrorDesc.Value = Convert.ToBoolean(false);

Thanks in advance

-Jamie

 

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Dec 22, 2006

Hi,

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Is there a way to use customproperties other than strings. DropDowns for example. If so, do you know a tutorial oder code snippet?



Thanks

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Feb 21, 2007

I'm building a custom transform component. I want to mark some input columns as keys for deduplicating. In a similar way to the provided Sort component, I want to check those columns and allow pass-throughs (or not) for the others - so next to each input column name I need two checkboxes (1:use for dedupe; 2:include in output if 1 not checked). If a column is checked for use in the dedupe, I want some other attributes to be shown indicating how it will be used. How do I display the checkboxes to let users select which columns to include for deduplication, and then how do I add further attributes underneath (copying the Sort component's look) for selection?

Thanks in advance for guidance and pointers on this.

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Mar 13, 2006

A month or so ago I instigated this thread- http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=243117&SiteID=1 which talked about how to conditionally add a column to my component depending on the value of a custom property. If the custom property is TRUE then the column should appear in the output (and vice versa).

Bob Bojanic said I should use the SetComponentProperty() method to do this and that is working pretty well. However, it bothers me that SetComponentProperty() could be called, the column will then be added, and then the package developer could press 'Cancel'. In this instance the value of my custom property would be inconsistent with the presence of the extra column.

How do you get around that?

Thanks

Jamie



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Feb 7, 2007

Hi,

I'm having my first go at developing a destination adapter which will send data to an update Web Service.

I've got some rather big gaps in my understanding. I've been following the various samples I've found on the net and have validated my mapping and picked up all the available column names and datatypes which are appearing in the Input and Output Properties tab of the Advanced Editor but I only have a tab for "Input Columns" and not "Column Mappings".

Which method defines the availble columns for the user to map?

Let me know if I haven't given enough information.

cheers

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Mar 7, 2007

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My feeble attempts to tease this out through Visual Studio got me this far:

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but now I'm stuck. Also, if it matters, this is an asynchronous transformation component.

Thanks!

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Apr 16, 2007

Hi,

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or can anyone give me any example how to use/handle error output collection in SSIS?



I will appreciate all kind of suggestions.



thanks

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Jul 23, 2007

I am new user on VB ( I wish ssis support c# script)



I have made a input string type column ( strName ) in script componen as ReadWrite.



In my script, I did following:



Row.strName = Row.strName + prefix



But I got following error at runtime:



The value is too large to fit in the column data area of the buffer.



at Microsoft.SqlServer.Dts.Pipeline.PipelineBuffer.SetString(Int32 columnIndex, String value)

at Microsoft.SqlServer.Dts.Pipeline.PipelineBuffer.set_Item(Int32 columnIndex, Object value)

at Microsoft.SqlServer.Dts.Pipeline.ScriptBuffer.set_Item(Int32 ColumnIndex, Object value)

at ScriptComponent_98d10a05854c460792443f2345d5d806.Input0Buffer.set_strName(String Value)

at ScriptComponent_98d10a05854c460792443f2345d5d806.ScriptMain.Input0_ProcessInputRow(Input0Buffer Row)

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at ScriptComponent_98d10a05854c460792443f2345d5d806.UserComponent.ProcessInput(Int32 InputID, PipelineBuffer Buffer)

at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.ProcessInput(Int32 inputID, PipelineBuffer buffer)





Could anyone tell me what I did wrong?



Thanks!

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Code:
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from tbl_ID
however this obviously just exports the text
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Mar 8, 2008



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data conversion

Excel destination
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Aug 14, 2007

Hi,

I've created a Custom Data Flow Component and added some Custom Properties.

I want the user to set the contents using an expression. I did some research and come up with the folowing:





Code Snippet
IDTSCustomProperty90 SourceTableProperty = ComponentMetaData.CustomPropertyCollection.New();
SourceTableProperty.ExpressionType = DTSCustomPropertyExpressionType.CPET_NOTIFY;
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Thank you

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Apr 2, 2007

Hi,



I'm trying to enable Expression for a custom property in my custom data flow component.

Here is the code I wrote to declare the custom property:



public override void ProvideComponentProperties()

{


ComponentMetaData.RuntimeConnectionCollection.RemoveAll();

RemoveAllInputsOutputsAndCustomProperties();



IDTSCustomProperty90 prop = ComponentMetaData.CustomPropertyCollection.New();

prop.Name = "MyProperty";

prop.Description = "My property description";

prop.Value = string.Empty;

prop.ExpressionType = DTSCustomPropertyExpressionType.CPET_NOTIFY;



...

}



In design mode, I can assign an expression to my custom property, but it get evaluated in design mode and not in runtime

Here is my expression (a file name based on a date contained in a user variable):



"DB" + (DT_WSTR, 4)YEAR( @[User::varCurrentDate] ) + RIGHT( "0" + (DT_WSTR, 2)MONTH( @[User::varCurrentDate] ), 2 ) + "\" + (DT_WSTR, 4)YEAR( @[User::varCurrentDate] ) + RIGHT( "0" + (DT_WSTR, 2)MONTH( @[User::varCurrentDate] ), 2 ) + ".VER"



@[User::varCurrentDate] is a DateTime variable and is assign to 0 at design time

So the expression is evaluated as: "DB189912189912.VER".



My package contains 2 data flow.

At runtime,

The first one is responsible to set a valid date in @[User::varCurrentDate] variable. (the date is 2007-01-15)

The second one contains my custom data flow component with my custom property that was set to an expression at design time



When my component get executed, my custom property value is still "DB189912189912.VER" and I expected "DB200701200701.VER"



Any idea ?



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BBBBBBBBBBBBBBBBBBBBBBBBBBBBB
CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
DDDDDDDDDDDDDDDDDDDDDDDDDDDDD
€¦€¦€¦€¦€¦€¦€¦.
€¦€¦€¦€¦€¦€¦€¦.
On exiting from the data flow I will use the variable of type Object in a Script Task, by reading each element in a cyclic fashion.
Is there anyone who have experienced something like this? Could anyone provide any example of that?
Thanks in advance!

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