Using Script Task, I had stored data ie a Dataset or Datatable object to a SSIS variable of data type Object.
I wanted to pull data from this SSIS object variable which contains a Dataset object of data, and store it to a destination. This is possible in Script Task itself. I know. But how is this possible by using other SSIS tasks ? We pull data from source tasks by connecting to server and using sql command.
But how do we pull data from a SSIS object variable ? I want a solution , other than Foreach loop container. Without using Foreach loop container, what is the solution ? Because, I dont suggest Foreach loop container, since there are records more than 300.
AFAIK without using script task you cannot pull data from object variable. You can use a Script component as a data source and add rows to its output from with in the script.
300 records is a very small number. If the Foreach loop works, then why not just use it? If you then have performance problems, and if you can trace them to the Foreach loop, then you should look into other options. But I have a hard time imagining that looping over 300 records is a significant problem. Of course you have more information than us, so maybe it really is an issue.
Related
How can several files be produced in a single SSIS package? I have created one that produces a single file, but have no idea how to produce several ones.
The package I produced uses variables to know which data to retrieve, and an expression in the flat file connection manager to assign the correct name to the file (which is based on variables).
The single package I created retrieves the city for which I want the sales data (New York) and the month (September 2020) as variables/parameters, and uses them to extract the appropriate data. Example of SQL statement executed:
select * from table1 where City = ? and Period = ??
It then uses those to build the name for the file to be exported and sends it to a folder. But how do you do that to produce several files within the same package? How can I make the same SSIS package produce another file for Chicago - July 2020, another for Denver - June 2020, and another for San Diego - March 2020?
I plan to have a table that indicates what needs to be produced.
ExampleRow1: Chicago, Sep 2020, Produce=Yes.
ExampleRow2: Miami, Jan 2020, Produce=Yes.
So the SSIS package would need to use that info to produce a file, and then do it again, and again, until there is nothing more to produce. Is this even possible? I know a foreach loop container can help, but not sure if it can handle so many variables changing. This is pretty much the first package I create, that's why I am this ignorant. Thanks in advance!
Right now, you have it working correctly for the value of your two SSIS variables (City and Period) and you have it parameterized so I wouldn't discount that as your first SSIS package. People struggle with far easier tasks
What you need to do is connect the orchestrator/driver table into your package. Here's how we're going to do that.
Create an SSIS variable called rsObject of type Object. This is going to hold a recordset object aka the results of our query.
Execute SQL Task
Add an Execute SQL Task to the Control Flow. Call it "SQL Get Driver Data" You'd use a query like
SELECT T.City, T.Period FROM dbo.ExtractSetup AS T WHERE T.Produce = 1;
Change the default of No Result Set to Full Result Set. That tells SSIS to expect a table shaped return object but something needs to catch that incoming data.
In the Results tab, you now need to map the results into an SSIS variable. Assuming an OLE DB type connection manager, you'll select User::rsObject in the Variable list and then 0 as the recordset name (doing this from memory so specifics might be a slightly off)
Save and run that task. Assuming no errors, when the package runs we have a, potentially empty, set of data in our recordset object. Let's do something with that.
Shredding the data
The name I generally see applied to getting data out of enumerable objects in SSIS is called "shredding the data". The implementation of that is an Foreach Enumerator - one of the most powerful tools in your toolkit.
Drag a ForEach Loop Container onto the canvas. Drag the connector line (precedent constraint) from the "SQL Get Driver Data" to our new ForEach Loop Container. I'd name it "FELC Shred Results" to indicate my intent.
Double click the Task and change the default enumerator type from File System to "Ado.net recordset" This has no bearing on whether you used an OLE, ODBC or ADO.NET connection manager to populate the table-like object. If it's a table, use ADO.NET Recordset.
Specify our variable [User::rsObject] as the source of the Recordset object.
The last thing we need to do is configure what we should do with the current row in the enumerator. That's in the Mapping tab. Here you'll add two parameters and this will be a zero based ordinal system. Choose [User::City] (or whatever you've named your City variable) for your first entry and map that to column name 0. Add a row and use User::Period and map that to column 1
The final step is to take the existing logic (Data Flow Task and whatever else is variable dependent) and move it into the FELC. That's literally drawing a box around it with the mouse to highlight everything and hold the left mouse button and drag it into the FELC.
Hit F5 and you should have 2 files generated.
Ive been searching the internet to what I thought would be a straight forward question to answer. Hope you guys can help?
I am using for each loop to look for specific files and move them with file system task to a different folder.
Say I have 10 csv files. called listed A to J
I only want to move a,e and j but cant seem to get the foreachloop to look for that group.
In the enumerator Files text box i have tried inserting the 3 file names split by various separators, but SSIS thinks its all one specific file and none of the 3 get moved.
Can someone advise how it can be done? Just to confirm, I dont to use wild card logic just group of specific file names - similur to the IN function of SQL query
Thanks in advance
now added img - please advise how to slect 3 specific files in the text box with arrow
Since OP isn't able to proceed with just my comment, I'll explain a bit more in detail -
Use an EXECUTE SQL TASK to dump the names of the files needed into an SSIS object (to do this you could use a stored procedure or an SQL query). Create an object-type variable in the variables tab prior, change the output in the EXECUTE SQL TASK to Full Result Set and map the result to the object you just created. Now this object holds the list of files you need to loop through.
Now drag-and-drop a ForEach container from the SSIS toolbox. It should be configured as a ForEach ADO Enumerator and map the object to it. Create another variable of type string that will hold the file names after each iteration of the ForEach container. Map this also in the Variables tab of the ForEach container.
Now, place the File System Task which you would use to move these files into the ForEach loop. Use the file-name-variable you created to move just the required files.
Now if you're not sure what SQL query to use for your case in step 1 to get the 3 file names -
SELECT 'A.csv'
UNION
SELECT 'E.csv'
UNION
SELECT 'J.csv'
In SSIS, i want to read data from a flat file(Flat File Source) and assign certain column values to a variable in SSIS (like IDNo). I need this ID to retrive other information like email and other details to send email dynamically later in the process.
I did some reasearch i found that Script Component is one of the way to assign values to variables, but in our environment script component is not available. Is it possible to do that if so, can some one please provide me a sample. thanks.
You don't necessarily need script component to achieve this.
Read your IDs to a recordset (that would be a variable of type Object):
Create a variable of type Object.
In Data Flow Task create a Recordset Destination.
Pick your variable in VariableName dropdown.
Create Foreach Loop Containter:
Choose Foreach ADO Enumerator in Enumerator setting.
As ADO object source variable pick your recordset variable from the dropdown list
In Variable Mappings assign your email variable with index 0
Send the emails from the loop using email variable as an expression in Send Email Task.
Why is script component not available? It'd make things easier and help to avoid some problems; I don't use mail task anymore in favour of script task, because I ran to some problems with it in the past.
Hope this helps.
I have a scenario where i need to pass an text file or excel file column as an parameter to my Sql Query in SSIS Package.
My Text or excel file has a column called Policy_no and it has more than 1000+ policy_no(EX: 12358685). i have an Sql script *select * from main_table where policy_no = ?*. And that that '?' has to be come from my package variable(txt or excel ).
Instead of manually writing script for each and every policy, how can we achieve this through SSIS.
Thanks
Assuming you want to loop through each row in your file and run the query against each individual value, you can use a Data Flow task to read your text file and load the policy numbers in an ADO Recordset (declared as a package variable). Next, you'd use a Foreach Loop Container to iterate through the recordset, loading each policy number in turn into a second variable and then executing your query and doing whatever other work is needed.
See Use a Recordset Destination in MSDN for an overview and example.
You can use EXECUTE SQL TASK (Connect Excel with OLE DB Connection) to get "Policy_no" data from Excel, then store the result into a variable, say:policyNoGroup, whose data type should be Object, then use For Each Loop to loop though variable policyNoGroup, see the example: http://www.codeproject.com/Articles/14341/Using-the-Foreach-ADO-Enumerator-in-SSIS
I have a complex task that I need to complete. It worked well before since there was only one file but this is now changing. Each file has one long row that is first bulk inserted into a staging table. From here I'm supposed to save the file name into another table and then insert the the broken up parts of the staging table data. This is not the problem. We might have just one file or even multiple files to load at once. What needs to happen is this:
The first SSIS task is a script task that does some checks. The second task prepares the file list.
The staging table is truncated.
The third task is currently a Foreach loop container task that uses the files from the file list and processes it:
File is loaded into table using Bulk Insert task.
The file name needs to be passed as a variable to the next process. This was done with a C# task before but it is now a bit more complex since there could be more than one file and each file name needs to be saved separately.
The last task is a SQL task that executes a stored procedure with the file name as input variable.
My problem is that before it was only one file. This was easy enough. What would the best way be to go about it now?
In Data Flow Task which imports your file create a derrived column. Populate it with system variable value of filename. Load filename into the same table.
Use a Execute SQL task to retrieve distinc list of filenames into a recordset (Object type variable).
Use For Each Loop container to loop through the recordset. Place your code inside the container. Code will recieve filename from the loop as a value of a variable and process the file.
Use Execute SQL task in For Each Loop container to call SP. Pass filename as a parameter like:
Exec sp_MyCode param1, param2, ?
Where ? will pass filename INPUT as a string
EDIT
To make Flat File Connection to pick up the file specified by a variable - use Connection String property of the Flat File Connection
Select FF Connection, right click and select Properties
Click on empty field for Expressions and then click ellipsis that appears. With Expressions you can define every property of the object listed there using variables. Many objects in SSIS can have Expressions specified.
Add an Expression, select Connection String Property and define an expression with absolute path to the file (just to be on a safe side, it can be a UNC path too).
All the above can be accomplished using C# code in the script task itself. You can loop through all the files one by one and for each file :
1. Bulk Copy the data to the staging
2. Insert the filename to the other table
You can modify the logic as per your requirement and desired execution flow.
Add a colunm to your staging table - FileName
Capture the filename in a SSIS Variable (using expressions) then run something like this each loop:
UPDATE StagingTable SET FileName=? WHERE FileName IS NULL
Why are you messing about with C#? From your description it's totally unnecessary.