SSIS - Precedence Constraint Editor
Aug 31, 2007
Dear Friends,
In my controlFlow I have 2 sequence container... Sequence1 goes to Sequence2 if an expression valuate to TRUE.
If the expression value is true, than there isn's any problem and sequence2 runs, but if the expression is FALSE the sequence2 container doesn't run.
OK?
In the case of expression valueate to FALSE I need to generate an error or an information in order to get it in the eventhandler automatic...
I can add a script task to make the package failure... but what I insert in the precedence constraint editor from Sequence1 to the scripttask?
Imagine... the expression from Sequence1 to Sequence2 is a>=b
The expression from Sequence1 to ScriotTask os a<b? (How can I define this only to run when the expression (seq1 to Seq2) is false??
Someone know how?
Regards!
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Jan 5, 2008
I am confused with Precedence constraint editor regarding Evaluation Operation and Multiple Constraints options. In the Evaluation Operation dropdown list, there are: Expression and Constraint and Expression OR Constraint. Why it still needs LOGICAL AND and LOGICAL OR in the multiple constraints options? Is it clear that Expression and Constraint is "LOGICAL AND" and "Expression OR Constraint" is "LOGICAL OR"?
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Feb 28, 2007
SQL Server 2005 now provides the ability to use expressions in the plans instead of just the Failed/Success/Completed constraints.
Can anyone tell me what language is used for these expressions. Where can I find a guide on this?
Thanks
Drew
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Aug 27, 2007
Dear all,
I've been searching the article for error handling in SSIS but seems no article have same problem exactly as mine. In my package there's container, it contains Data Flow task and some of Script tasks. I put an error precedence from Data Flow task into Script task that contains script for log an error that might be occured. The Data Flow task imports data from flat file into SQL Server 2005 and I've set a semicolon as the column delimiter. Unfortunately there is a data in flat file that had one column contain semicolon as its value.
This would trigger an error and I hope the error would be logged into a table as I wrote inside Script task. But it didn't work. The error precedence won't work, the package stop in flat file source instead. I've been trying the event handler but it didn't work either. Maybe I got wrong implementation, anybody can help me explain the error handler and solve the problem ?
Here is the capture of my package, since I didn't know how to attach the picture in this forum.
Thanks in advance.
Best regards,
Hery
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May 22, 2008
hi all - this is the first time i've worked with SSIS / Business Intelligence, and I'm having an issue with a piece of basic functinoality.
I'm working with some dtsx jobs which were all conversions from Sql Server 2000 DTS jobs. The conversion process "seemed" to go smoothly. I used the Migration Wizard, and it successfully converted my outputted DTS job files into DTSX files.
In the Business Intelligence design environment (Control Flow) for a specific dtsx package, I have two tasks that are linked together by a Precedence Constraint.
* Task A Truncates all data in Database B --> Table A
* the precedence constraint says that if Task A is successful, then go on to Task B (or at least i think it does)
* Task B copies the newest data from Database A --> Table A over to Database B --> Table A
Everything appears to be correct, but if i right-click Task A and perform an "Execute Task" command, Task A will run successfully, but then stops short without running Task B.
Are there any common "gotchas" or issues that I might be missing which would cause this behavior? I deleted the existing precedence constraint, and added back a new one with the same settings, but Task B still will not run.
thanks for any help on this
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Dec 20, 2007
I have two packages - one works, the other doesn't. Both have two tasks: an Execute SQL Task and a dependent Send Mail Task. I am using a precedence constraint where the evaluation operation is an expression evaluating a variable created by a select count(*) as variable in the query. Both variables are defined as int32, initial value of 0 with a scope for the entire package.
The expression that works tests for an error_counts > 0 condition; the one that doesn't tests for load_counts < 24. The > 0 sends mail when the error_count is greater than 0 but doesn't send mail when it is 0, which is as I intended. The less than 24 package always sends mail even though the variable resultset_singlerow is usually 24. When I look at both properties for the Execute SQL Task steps side by side, they have no differences. When I look at the properties for the constraint, the only difference is in the EvaluatesTrue, which is set to False for the one that works and True for the one that doesn't. Unfortunately, that property is grayed out (not modifiable) and doesn't seem to be an option when I edit via the Precedence Constraint Editor.
I've looked a Books Online & Google with no references to a similar situation. Does anyone have a solution? Is the EvaluatesTrue the problem? And if it is, how can I change the setting? If not, what is the problem?
Thanks in advance for any help.
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Dec 20, 2007
I have two packages - one works, the other doesn't. Both have two tasks: an Execute SQL Task and a dependent Send Mail Task. I am using a precedence constraint where the evaluation operation is an expression evaluating a variable created by a select count(*) as variable in the query. Both variables are defined as int32, initial value of 0 with a scope for the entire package. The expression that works tests for an error_counts > 0 condition; the one that doesn't tests for load_counts < 24. The > 0 sends mail when the error_count is greater than 0 but doesn't send mail when it is 0, which is as I intended. The less than 24 package always sends mail even though the variable resultset_singlerow is usually 24.
When I look at both properties for the Execute SQL Task steps side by side, they have no differences. When I look at the properties for the constraint, the only difference is in the EvaluatesTrue, which is set to False for the one that works and True for the one that doesn't. Unfortunately, that property is greyed out (not modifiable) and doesn't seem to be an option when I edit via the Precedence Constraint Editor.
I've looked a Books Online & Google with no references to a similar situation. Does anyone have a solution? Is the EvaluatesTrue the problem? And if it is, how can I change the setting?
Thanks in advance for any help.
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May 1, 2008
Hi,
I have 3 data flows connected sequentially on my workflow before processing dimensions and facts which checks data from different databases and if conditions does not meet then writes to log table. So if it writes to log table , I have to quit and finish the workflow.
How can I do that?
thanks,
J
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Jul 30, 2007
Hi all
I've got a package that checks the length of chars in a flatfile and if it's correct it executes the dataflow task.
How can i write an expression in the precedense constraint editor to skip the dataflow task if there is an error in the script task?
Thank you
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Mar 5, 2008
I am struggling here with precendece constraints and variables.
I have the following scenario:
Task A
Task B
Task C
@var1!=0
@var1==0
Task A, Task B and TaskC
Task A (Execute SQL Task which assigns a value to a variable say, var1) determines if TaskB will execute i.e.
IF var1 !=0 Execute Task B and then Execute Task C
IF var1== Execute Task C
Is this possible in SSIS?
Problem:
Each time I try to do this, the package never executes Task C. It always either Executes Task A or Task A and Task B.
For example if var1 !=0 it executes Task A and Task B
but if var1 == 0 it executes only Task A.
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Feb 5, 2008
Hi,
Whenever I open my package, the Precedence Constraint lines get distorted. This makes my package look messy. Is there any way to stop this from happening?
Thanks for your help!
Subha
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May 16, 2015
I have (6) sequence containers, each with a data flow task and script task. The script task renames the file and the data flow uses an OLE DB Source connection to export to a flat file using the Flat File Destination connection.For sI have been unable to move from the 1st sequence container to the 2nd (and the next and so on...). I am trying to do this "on success" (on failure I generate an email notification within each container), but am apparently missing a piece to this because after the sequence container executes, which it does successfully, nothing happens.
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Dec 13, 2006
Greetings,
I have an expression in a precedence constraint that is returning false when it should return true. This is the expression that returns false:
((5500 / 9990) * 100) > 10
The following expression returns true. I did the division (5500 / 9990) myself and substituted the resulting value:
((0.55055055055055055055055055055055) * 100) > 10
Why is the first expression returning false? I'm stuck in the mud up to my axles on this and I know I'll probably feel like a fool when I learn the answer...
Thanks,
BCB
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Aug 1, 2007
I have designed an SSIS package that :
(1) contains a for loop task (in which all the logic is contained) that loops through a particular folder for excel files
WITHIN THE FOR LOOP:
(2) pulls data from an excel file into SQL Tables(Data Transformation Task)
(3) run stored proc to validate data (Execute SQL TASK)
(4)ON SUCCESS of executing the SQL Task (Script Task - move file to success or reject folder based on value returned from sproc)
(5)ON FAILURE of executing the stored proc (Script Task - move file to bad format failure)
NOTE:
I have modified the MaximumErrorcount property of (1 FOR LOOP) and (3 EXECUTE SQL TASK) and the package itself to 0.
In order to deal with badly formatted excel files...I do not want the package to stop for every missing tab in excel file or data entry error. I simply want the badly formatted file to be moved to a special folder
PROBLEM:
on failure logic is never executed (I have 2 options after step (3)) on success do step (4) on failure do step (5)
step (3) fails...then it simply iterates to the next file
step 5 is never executed
Is this because I changed the maximumerrorcount property?
What am I doing wrong witht he Precendence Logic?
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Aug 4, 2015
I am creating one SSIS package where my source is oracle. I have transferred the data from Oracle to flat file as per client requirement.I have to create single package for 2 country 1 is US and another is CANADA Columns are below
ZONE_ID,
ZONE_NAME
Zone Id having data like 10001,10002,10003,20001,2002,2003
Where zone_id start with 1000 is US Zone and Zone_Id start with 2000 is Canada Zone.
For US:
1. Load geography data from DB tables into flat files
2. Load geography data from flat files to Spectrum DB tables
For Canada:
1. Load geography data from DB tables into flat files
2. Load geography data from flat files to Spectrum DB tables
Now I want to look from flat file if Zone_id start with 1000 then it must go to US_DFT and if Zone_id start with 2000 then it must go to CANADA_DFT.
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Jul 29, 2015
Send Mail task not working properly when it configured in Precedence Constraint (Failure)...
Scenario:
I'm using multiple containers in my ssis package. Also I have configured mail task for capturing error.
I'm getting mail only when error occurs in foreach loop container. If error occurs in other containers it doesn't works.
Actually I would like to receive mail notification on error when it occurs in any of the containers or DFT.
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Dec 5, 2007
I have DTSX package where all the Control Flow Boxes are connected by precedence constraints (the Green Lines).
However, only half of them visible!
If I try and add another it says:
Cannot create connector.
Only one workflow can exist between the same two executables.
I don't want to have to drop and create them all the constraints (because there are a lot of them!)
But I can't even do that - since I can't see them, I can't select them; and I don't think I can delete them without being able to select them. Am I missing something? Zooming in makes everything larger, but it doesn't make my Green Lines reappear.
Help!
And yes, I'm using the latest version of everything:-
Microsoft Visual Studio 2005
Version 8.9.50727.762 (SP.050727-7600)
SQL SERVER 2005
9.00.3054.00 SP2 Developer Edition
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Oct 29, 2006
This is more a medium level annoyance than a problem. When I save a package, close it and later re-open it, the precendence constraints end up all over the place making my neatly layed out diagram a shambles.
Call me anally retentive if you like (you wont be the first ), but I find this extremely annoying. Does anybody else have this problem? Does anyone have a solution?
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Dec 13, 2007
Hi,
I'm building a package wherein I perform a SQL task(A) if the error log is not empty. This same SQL task(A) is also being used by another data flow task(B). The precedence points from B to A bottom to top. When I execute, all the tasks in the downward direction (precedence pointing downward/sideways) execute but this one doesnt as it points updwards. I can copy and paste task A and make B point to A downward, but I dont want to duplicate A in the same package.
Is there any other approach?
If you dont understand the above, see the flow:
X (SQL task) ----on success-------------> A (SQL task)
| ^
| |
...(sequence of steps) |
| |
| |
B(Data Flow Task) ---------failure --------|
Execution flow doesnt move from B to A, even though its a failure condition. Hope this explains the problem.
Thanks and Regards,
Subha Fernando
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Feb 8, 2008
I need to check if the date is Null then use today's date and if not do something else.
If RowModifiedOn IS NULL Then
GETUTCDATE()
ELSE
DATEADD("Hh",@[User::TimeZone],RowModifiedOn)
End If
What do I do wrong here? Can I do something like it?
RowModifiedOn == NULL ? GETUTCDATE() : DATEADD("Hh",@[User::TimeZone],RowModifiedOn)
Thanks.
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Jan 17, 2008
This code works in the SQL task in dts packages but not in SQL task in SSIS. It would run the file but the problem is that when there is an error it doesn't raise the error in SQL task in SSIS. Anyone can provide me with a solution would be appreciated.
USE MASTER
DECLARE @result int
EXEC @result = xp_cmdshell 'dtexec /f "D:File2.dtsx"'
If (@result <> 0 )
BEGIN
RaisError ('Job Failed.',16,1)
END
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Oct 13, 2006
I am having a problem in the Business Intelligence Development Studio. When I add and try to edit a Script Task or a Script Component, I click on the Design Script button and get one of two errors. For the Script task I get an error that states:
Cannot show the editor for this task. (Microsoft Visual Studio)
For the Script component I get:
Cannot show Visual Studio for Applications editor. (Microsoft Visual Studio)
For some reason or another it just will not start Visual Studio for Applications. I have uninstalled an re-installed several times. I have also researched and discovered that there is a bug when C# tasks are include in the project. However, this is not the case. Please help!
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Aug 23, 2007
I am trying to put the following as an expression in the SSIS Derived Column Transformation Editor.
DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()), 0)
It is not allowing it. This works fine in a regular SQL statement.
Does anyone know how I can get this to work?
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Jul 26, 2007
Since applying July 2007 Microsoft patches it was noted that we were not able to open the editor for the Script Task component in an SSIS package. We received an error dialog with text similar to 'Engine failed with unknown error. (Microsoft.VisualBasic.Vsa.Dt).' All other solutions provided in the forum did not resolve our issue. It was noted somewhere else that the OLE32.dll seemed to have been affected. We reregistered this file using the command 'regsvr32.exe ole32.dll' and suddenly we were able to get into the editor. I don't know why this fixed the issue, but it did for us in our environment. Good luck!
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Apr 14, 2008
Hi All
I have seen several posts on this issue but as yet no answer. So i'm hoping that somewhere out there knows what the issue is.
SSIS package queries database creates MS spreadsheets per customer and then emails each customer their list.
Anyway all works fine apart from the fact that the Excel Destination Editor converts the date from uk to us format. My routine is already using an MS Excel template (correctly formatted) which it copies as part of the package.
Any ideas anyone?
rgds
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Nov 30, 2007
I am trying to create a SQL Task that basically insert a record into a temp table then upon succession, it will invoke another SQL Task. But for some reason the second SQL Task has never gotten triggered. Is there some configuration settings that I need to setup?
Thanks in advance,
Andrew
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Apr 30, 2015
I have VS 2013 installed in my machine with SQL server 2012 ,I have installed Microsoft data tools for VS 2013,In the integration service project i used script component when i try to pen the script task its not opening VSTA projects ,its simple ideally without any action.I am facing this issue for past 2 months i tried fixing this problem but no use.
The script task editor has "Access VSTA to write script using VS 2012".So i installed VSTA tools for 2012 and 2013 but no issue.
But the script component works for VS 2010.I have installed Microsoft Visual Studio tools for VS 2012,VS2012 AND VS 2013.
This issue is occurring for VS 2012 and VS 2013.
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Dec 18, 2006
Note: I'm running a bottom up design on this project as I won't know what data I'm really working with until I can get it imported and analyze it. Also, I'm not a DBA or developer, so please be gentle...
I am importing 30k+ rows using SSIS (OLEDB -DB2- source to OleDB -2k5- destination). The import works fine, but I just realized that I need to set up a pk on the row emp_ids. The problem is that in the DB2 source, the emp_ids were removed (set to whitespace, but not null). So, I can't just uncheck the 'keep nulls' option and import the data.
Any suggestions or links (using SSIS) on how to identify the rows where emp_id = "whitespaces" and 1) either keep them from being imported, or 2) remove them afterwards?
(I suppose this could be done using sql statement to identify the whitespace rows, but that would present difficulties of its own due to the random spacing nature of the updates. Also, I'm hoping for a checkbox wonder solution.)
Please advise. Thanks!
- Isaac
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Jun 18, 2015
In my SSIS package i am loading data from 1 source database to 2 targets database, both targets have same structure and datatype.
My package is working fine for 1 target database but for 2 nd database its giving error "Violation of PRIMARY KEY constraint" but where as primary key constraint is not violating .
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May 13, 2008
Hi, all.
I am trying to create table with following SQL script:
Code Snippet
create table Projects(
ID smallint identity (0, 1) constraint PK_Projects primary key,
Name nvarchar (255) constraint NN_Prj_Name not null,
Creator nvarchar (255),
CreateDate datetime
);
When I execute this script I get following error message:
Error source: SQL Server Compact ADO.NET Data Provider
Error message: Named Constraint is not supported for this type of constraint. [ Constraint Name = NN_Prj_Name ]
I looked in the SQL Server Books Online and saw following:
CREATE TABLE (SQL Server Compact)
...
< column_constraint > ::= [ CONSTRAINT constraint_name ] { [ NULL | NOT NULL ] | [ PRIMARY KEY | UNIQUE ] | REFERENCES ref_table [ ( ref_column ) ] [ ON DELETE { CASCADE | NO ACTION } ] [ ON UPDATE { CASCADE | NO ACTION } ]
As I understand according to documentation named constraints should be supported, however error message says opposite. I can rephrase SQL script by removing named constraint.
Code Snippet
create table Projects(
ID smallint identity (0, 1) constraint PK_Projects primary key,
Name nvarchar (255) not null,
Creator nvarchar (255),
CreateDate datetime
);
This script executes correctly, however I want named constraints and this does not satisfy me.
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May 13, 2008
We are using SQL CE 3.5 on tablet PCs, that synchs with our host SQL 2005 Server using Microsoft Synchronization Services. On the tablets, when inserting a record, we get the following error:
A duplicate value cannot be inserted into a unique index. [ Table name = refRegTitle,Constraint name = PK_refRegTitle
But the only PK on this table is RegTitleID.
The table structure is:
[RegTitleID] [int] IDENTITY(1,1) NOT NULL,
[RegTitleNumber] [int] NOT NULL,
[RegTitleDescription] [varchar](200) NOT NULL,
[FacilityTypeID] [int] NOT NULL,
[Active] [bit] NOT NULL,
The problem occurs when a Title Number is inserted and a record with that number already exists. There is no unique constraint on Title Number.
Has anyone else experienced this?
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Mar 13, 2008
How is the column precedence determined when more then one column is included in the group by clause? I am using T-SQL.
for example:
SELECT VendorName, VendorState, SUM(Invoices.InvoiceTotal) AS InvoiceSum
FROM Vendors JOIN Invoices ON
Vendors.VendorID = Invoices.InvoiceID
GROUP BY VendorState, VendorName
I would expect this statement to group by VendorState first but my result set is grouping by VendorName and then VendorState.
Am I missing something?
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Jan 31, 2007
Hi there!
I've a few tasks in my dataflow. Some of them are executed depending on an precedence constrain. Works fine.
The problem is following: I want to write a success message (execute SQL task), when all the tasks who have been executed have done this with success. For example, i ve ten tasks, and 2 of them are executed (successfully). This is good, i want to execute my task to write the success message.
I tried to set these precedence constraints with EvalOP = ExpressionOrConstraint, Values = Success and an expression, what returns TRUE, when the task above is not executed (the condition from a precedence constraint above). But the task to write my message will never be executed, because it seems the task does'nt give any result (neither success nor failure) when they ar not executed, and so my AND-Constraint for the success message task will only get TRUE, when ALL task are executed (and successful).
Is there any chance to get somethink like "isSuccess OR IsNotExecuted" into a precedence constraint?
Thanks, Torsten
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