Logging Dynamic SQL Variable When EvaluateAsExpression=TRUE

Oct 24, 2006

I am trying to use the idea as mentioned by Jamie at:
http://blogs.conchango.com/jamiethomson/archive/2005/12/09/2480.aspx
which is to build dynamic SQL using a variable evaluated as an expression.

Set Expression="SELECT * FROM MyTable WHERE MyColumn = " + @[VariableContainingFilterValue]

Everything works fine. The entire package works.
My next step is to log the variable so that I know, after package execution, exactly what SQL statement the package is executing.
I tried to do it by a couple of ways in a Script task:

1) Dts.Events.FireInformation(0, String.Empty, String.Format("SQL: {0}", Dts.Variables("SourceSQL").Expression), String.Empty, 0, False)

Gives me just an expression without actually evaluating it

2) Dts.Events.FireInformation(0, String.Empty, String.Format("SQL: {0}", Dts.Variables("SourceSQL").Value), String.Empty, 0, False)

Produces an error:
The expression for variable €œSourceSQL€? failed evaluation. There was an error in the expression.


Regards,
Yitzhak

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SQL 2012 :: Set SSIS EvaluateAsExpression Property Of Variable To TRUE?

Jul 23, 2015

Where do you set an SSIS EvaluateAsExpression property of the variable to TRUE?

[URL]

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Sep 28, 2007

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This appears to be specific to my machine since this same package behaves as expected on other PCs. I have tried to build my expression in a text editor and paste it into the Expression property, but only the first line of the expression is pasted. Am I missing a configuration or install somewhere? Any thoughts on solutions or work arounds will be greatly appreciated.

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Feb 7, 2007

Since I can't seem tofind the Microsoft SQL 2000 forum, I will post this here:



I currently have logging enable on several of my packages.
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of 100 and logging will eventually need to be active on all of them. In
production, there will still be a development server and a production server,
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-----



As a second question: can anyone explain to me why the errordescription field
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Oct 13, 2015

I would like to have a dynamic trigger on INSERT, UPDATE and DELETE. (each their own trigger).

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For example:

CREATE TABLE [dbo].[TRIGGER_TEST](
[COLUMNA] [int] IDENTITY(1,1) NOT NULL,
[COLUMNB] [nvarchar](50) NOT NULL,
[COLUMNC] [nvarchar](20) NULL,
[COLUMND] [date] NULL,
[COLUME] [decimal](2, 2) NULL,

[Code] ....

When I insert an item in TRIGGER_TEST, i would like to see what is inserted in the TRIGGER_LOGGING table.

INSERT INTO [dbo].[TRIGGER_TEST]
([COLUMNB]
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,[COLUMND]
,[COLUME])
VALUES
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GO

I would like to see in my TRIGGER_LOGGING table in NEW:

COLUMNB='test'|COLUMNC='hello'|COLUMND='2015-10-13 16:04'|COLUME=0,10

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Feb 15, 2006

Hi,

I've come up against a problem in my error handling.

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I have another SQL Execute task, which executes a SQL script from a file connection. This is a very long script (100s of lines) and works fine. I introduced a deliberate error into it and got the following errors:

Error: The variable System::ErrorDescription contains a string that exceeds the maximum allowed length of 4000 characters.
Error: Reading the variable "System::ErrorDescription" failed with error code 0xC0047100.
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The problem is obviously the length of the script, since SSIS attempts to copy all of it into the ErrorDescription, but this seems to occur before I can do anything about it. I've tried putting a SUBSTRING function around the ErrorDescription variable without success. If I introduce an error into a shorter script the error handling works fine.

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thanks
- Jerzy

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Dec 4, 2007

Hi,

A few Q's if I may:


When configuring a variable you have to set its Value, even if EvaluateAsExpression = TRUE and an expression is specified. Presumably the Value is a compile-time default which holds until runtime?

I have 2 Execute SQL tasks preceeding a Data Flow Task. Precedence constraints require both Exec SQL Tasks to have completed successfully, before the data flow task can be entered. Each Exec SQL Task sets a variable, and a 3rd variable, which is evaluated as an expression, is a function of the 1st 2. Does the expression get re-evaluated automatically+immediately, every time one or both of its dependent variables' values changes? Thus can it be GUARANTEED that the 3rd variable has indeed been re-evaluated BEFORE the data flow is entered?

Per 1000 runs I get a dozen or so of the following errors: 'expression for variable ... failed evaluation. There was an error in the expression.' Any ideas..?

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I am under the "control Flow" tab.

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declare @score int
declare @stm nchar(500)
set @score=0
While @score<=50

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Hi guys

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then..
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Hi,

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DECLARE @RESULT nVARCHAR(1000);SET @RESULT=''
DECLARE @mpq int;SET @mpq=0
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May 8, 2008



Hi,

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Simplified it looks like this:


-- Standard SQL ----------------------------------------------------------------------------------------------------------------
DECLARE @TestTable as TABLE(MyBigInt bigint NOT NULL, Myint int NOT NULL);



INSERT @TestTable SELECT 4711,10

SELECT* FROM @TestTable
-----------------------------------------------------------------------------------------------------------------------------------------

If i do the same thing in dynamic sql, i get errors.

-- Dynamic SQL ----------------------------------------------------------------------------------------------------------------

DECLARE @DynamicTestTable as Table(MyBigInt bigint NOT NULL, Myint int NOT NULL);

DECLARE @SQLString as nvarchar(max), @Parameters as nvarchar(2000);


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EXECUTE sp_executesql @SQLString, @Parameters, @DynamicTestTableOUT = @DynamicTestTable OUTPUT ;


SELECT* FROM @DynamicTestTable;
-----------------------------------------------------------------------------------------------------------------------------------------


What is wrong with tis code? Or are table variables not supported inside dynamic SQL?

Thanks in advance
Raimund

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Jul 23, 2005

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Nov 2, 2007

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May 29, 2006

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May 8, 2006

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Nov 1, 2007



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Jun 18, 2007

Greetings,



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Jan 30, 2007

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Here is the SP

set ANSI_NULLS ON
set QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[sp_AddAnalyte]
@Analyt NVarChar(100),
@LName NVarChar(100),
@AtomicNum NVarChar(100),
@AtomicMass NVarChar(100),
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@HalfLife NVarChar(100),
@Units NVarChar(100),
@HF_Secs NVarChar(100),
@Gas NVarChar(100),
@Nat NVarChar(100)
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Feb 5, 2004

Hi I'm new to MS SQL and trying to write a very small dynamic stored procedure which is giving me a headache.

What I have is:


CREATE PROCEDURE busy_report

@TableName varchar(255),
@reporteddate datetime=NULL

AS
if @reporteddate is null
select @reporteddate = CURRENT_TIMESTAMP

-- Create a variable @SQLStatement
DECLARE @SQLStatement varchar(255)
SET DATEFORMAT dmy

-- Enter the dynamic SQL statement into the
-- variable @SQLStatement
SELECT @SQLStatement = "SELECT vendor, reporteddate, count(vendor) FROM " +
@TableName + "WHERE reporteddate = ' "
+ @reporteddate + " '"


-- Execute the SQL statement
EXEC(@SQLStatement)
GO

The error I keep getting is:

Server: Msg 8114, Level 16, State 4, Procedure busy_report, Line 0
Error converting data type varchar to datetime.

Any ideas appreciated.

(Edit:)

I've also tried it this way:


CREATE PROCEDURE UK_busy_report

@TableName varchar(255),
@reporteddate datetime=NULL

AS

-- Create a variable @SQLStatement
DECLARE @SQLStatement varchar(255)
SELECT @reporteddate=CONVERT(datetime, @reporteddate)
IF @@ERROR <> 0 BEGIN

/* Do some error processing */

PRINT 'Error Occured' END

ELSE
-- Enter the dynamic SQL statement into the
-- variable @SQLStatement
SELECT @SQLStatement = "SELECT vendor, reporteddate, count(vendor) FROM " +
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+ @reporteddate + " '"


-- Execute the SQL statement
EXEC(@SQLStatement)
GO

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.logic.

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Not wishing to derail the other recent thread on loading a local variable, I've posted this query (hee,hee,hee...I kill me) on a separate thread...though I think I am trying to do something similar...that is to build a dynamic select statement, but return a count of the rows it finds/doesn't find to a local variable...using the (amazingly timely) responses above, I tried this:

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DECLARE @SQLCmd varchar(256)
DECLARE @TargetDate smalldatetime
DECLARE @TLevel int
DECLARE @n int
SET @TargetDate = '2004-05-24'
SET @TLevel = 1


SET @SQLCmd = 'SELECT @n = count(*) FROM EventLog WHERE ((CONVERT(varchar(10), [Date], 101) = ''' +
CONVERT(varchar(10), @TargetDate, 101) + ''') AND (MsgLevel = ' +
CONVERT(varchar(3), @TLevel) + '))'
exec (@SQLCmd)
if @n > 0
print 'yep'
else print 'nope'

and, it's TRYING to work...but apparently the local variable @n is not recognized in the execution of the dynamic statement, as this is the output:
Server: Msg 137, Level 15, State 1, Line 1
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nope

Thoughts?

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Jul 20, 2005

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set @pYear_Internal = [D FISCALPERIOD].[FP CODE].[FP CODE]
WITH
MEMBER MEASURES.[REVENUE] AS [Measures].[TOTAL REVENUE]
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[code]....

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