Expressions

Jun 7, 2006



When creating expressions we have access to a list of functions. It is my understanding that while these functions seem to have the same names and parameters as SQL functions, they are not so. They are implemented in the package libraries themselves. It is also my understanding that this function library cannot be extended to add new ones.

Am I correct? If so... why not?

Leaving alone the fact that they follow the same screwy names as SQL (instead of .NET on which SSIS is built on) and what seems to be a limited library (i.e. You have YEAR(), MONTH(), DAY() functions but no HOUR(), MINUTE(), or SEC() functions -- instead you have to use DATEPART())

I mean honestly... a common expression for most people is using date and times for folder and filenames... So instead of a simple .NET type expression of DateTime.ToString("yyyyMMdd") or Format(DateTime.Now, "yyyyMMdd_hhmmss") I end up with the very complex:

(DT_STR, 4, 1252) YEAR( GETDATE() ) + RIGHT("0" + (DT_STR, 2, 1252) MONTH( GETDATE() ), 2) + RIGHT("0" + (DT_STR, 2, 1252) DAY( GETDATE() ), 2) + "_" + RIGHT("0" + (DT_STR, 2, 1252) DATEPART("hour", GetDate()), 2) + RIGHT("0" + (DT_STR, 2, 1252) DATEPART("minute", GetDate()), 2) + RIGHT("0" + (DT_STR, 2, 1252) DATEPART("second", GetDate()), 2)

Personally I find myself using Script Tasks and Variables to "build" my expressions and just use Expressions to set the property to the variable. (Which I think may defeat the full purpose of expressions.)

Any thoughts?

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Valid Expressions Are Constants, Constant Expressions, And (in Some Contexts) Variables. Column Names Are Not Permitted.

Dec 11, 2007

I want to have this query insert a bunch of XML but i get this error...


Msg 128, Level 15, State 1, Procedure InsertTimeCard, Line 117

The name "ExpenseRptID" is not permitted in this context. Valid expressions are constants, constant expressions, and (in some contexts) variables. Column names are not permitted.

Msg 128, Level 15, State 1, Procedure InsertTimeCard, Line 151

The name "DateWorked" is not permitted in this context. Valid expressions are constants, constant expressions, and (in some contexts) variables. Column names are not permitted.

What am i doing wrong...Can anyone help me out!! Thanks!!

p.s I know this query looks crazy...


Code Block

IF EXISTS (SELECT NAME FROM sysobjects WHERE NAME = 'InsertTimeCard' AND type = 'P' AND uid=(Select uid from sysusers where name=current_user))
BEGIN
DROP PROCEDURE InsertTimeCard
END
go
/*********************************************************************************************************
** PROC NAME : InsertTimeCardHoursWorked
**
** AUTHOR : Demetrius Powers
**
** TODO/ISSUES
** ------------------------------------------------------------------------------------
**
**
** MODIFICATIONS
** ------------------------------------------------------------------------------------
** Name Date Comment
** ------------------------------------------------------------------------------------
** Powers 12/11/2007 -Initial Creation
*********************************************************************************************************/
CREATE PROCEDURE InsertTimeCard
@DateCreated DateTime,
@EmployeeID int,
@DateEntered DateTime,
@SerializedXML text,
@Result int output
as
declare @NewTimeCardID int
select @NewTimeCardID = max(TimeCardID) from OPS_TimeCards
-- proc settings
SET NOCOUNT ON

-- local variables
DECLARE @intDoc int
DECLARE @bolOpen bit
SET @bolOpen = 0
--Prepare the XML document to be loaded
EXEC sp_xml_preparedocument @intDoc OUTPUT, @SerializedXML
-- check for error
IF @@ERROR <> 0
GOTO ErrorHandler
--The document was prepared so set the boolean indicator so we know to close it if an error occurs.
SET @bolOpen = 1


--Create temp variable to store values inthe XML document
DECLARE @tempXMLTimeCardExpense TABLE
(
TimeCardExpenseID int not null identity(1,1),
TimeCardID int,
ExpenseRptID int,
ExpenseDate datetime,
ProjectID int,
ExpenseDescription nvarchar(510),
ExpenseAmount money,
ExpenseCodeID int,
AttachedRct bit,
SubmittoExpRep bit
)
DECLARE @tempXMLTimeCardWorked TABLE
(
TimeCardDetailID int not null identity(1,1),
TimeCardID int,
DateWorked DateTime,
ProjectID int,
WorkDescription nvarchar(510),
BillableHours float,
BillingRate money,
WorkCodeID int,
Location nvarchar(50)
)
-- begin trans
BEGIN TRANSACTION
insert OPS_TimeCards(NewTimeCardID, DateCreated, EmployeeID, DateEntered, Paid)
values (@NewTimeCardID, @DateCreated, @EmployeeID, @DateEntered, 0)
-- check for error
IF @@ERROR <> 0
GOTO ErrorHandler


--Now use @intDoc with XPATH style queries on the XML
INSERT @tempXMLTimeCardExpense (TimeCardID, ExpenseRptID, ExpenseDate, ProjectID, ExpenseDescription, ExpenseAmount, ExpenseCodeID, AttachedRct, SubmittoExpRep)
SELECT @NewTimeCardID, ExpenseRptID, ExpenseDate, ProjectID, ExpenseDescription, ExpenseAmount, ExpenseCodeID, AttachedRct, SubmittoExpRep
FROM OPENXML(@intDoc, '/ArrayOfTimeCardExpense/TimeCardExpense', 2)
WITH ( ExpenseRptID int 'ExpenseRptID',
ExpenseDate datetime 'ExpenseDate',
ProjectID int 'ProjectID',
ExpenseDescription nvarchar(510) 'ExpenseDescription',
ExpenseAmount money 'ExpenseAmount',
ExpenseCodeID int 'ExpenseCodeID',
AttachedRct bit 'AttachedRct',
SubmittoExpRep bit 'SubmittoExpRep')
-- check for error
IF @@ERROR <> 0
GOTO ErrorHandler

-- remove XML doc from memory
EXEC sp_xml_removedocument @intDoc
SET @bolOpen = 0


INSERT OPS_TimeCardExpenses(TimeCardID, ExpenseRptID, ExpenseDate, ProjectID, ExpenseDescription, ExpenseAmount, ExpenseCodeID, AttachedRct, SubmittoExpRep)
Values(@NewTimeCardID, ExpenseRptID, ExpenseDate, ProjectID, ExpenseDescription, ExpenseAmount, ExpenseCodeID, AttachedRct, SubmittoExpRep)
select @NewTimeCardID, ExpenseRptID, ExpenseDate, ProjectID, ExpenseDescription, ExpenseAmount, ExpenseCodeID, AttachedRct, SubmittoExpRep
from @tempXMLTimeCardExpense
-- check for error
IF @@ERROR <> 0
GOTO ErrorHandler

-- For time worked...
INSERT @tempXMLTimeCardWorked(TimeCardID, DateWorked, ProjectID, WorkDescription, BillableHours, BillingRate, WorkCodeID, Location)
SELECT @NewTimeCardID, DateWorked, ProjectID, WorkDescription, BilliableHours, BillingRate, WorkCodeID, Location
FROM OPENXML(@intDoc, '/ArrayOfTimeCardWorked/TimeCardWorked', 2)
WITH ( DateWorked DateTime 'DateWorked',
ProjectID datetime 'ProjectID',
WorkDescription nvarchar(max) 'WorkDescription',
BilliableHours float 'BilliableHours',
BillingRate money 'BillingRate',
WorkCodeID int 'WorkCodeID',
Location nvarchar(50)'Location')
-- check for error
IF @@ERROR <> 0
GOTO ErrorHandler

-- remove XML doc from memory
EXEC sp_xml_removedocument @intDoc
SET @bolOpen = 0


INSERT OPS_TimeCardHours(TimeCardID, DateWorked, ProjectID, WorkDescription, BillableHours, BillingRate, WorkCodeID, Location)
Values(@NewTimeCardID,DateWorked, ProjectID, WorkDescription, BillableHours, BillingRate, WorkCodeID, Location)
select @NewTimeCardID ,DateWorked, ProjectID, WorkDescription, BillableHours, BillingRate, WorkCodeID, Location
from @tempXMLTimeCardWorked


-- commit transaction, and exit
COMMIT TRANSACTION
set @Result = @NewTimeCardID
RETURN 0

-- Error Handler
ErrorHandler:
-- see if transaction is open
IF @@TRANCOUNT > 0
BEGIN
-- rollback tran
ROLLBACK TRANSACTION
END
-- set failure values
SET @Result = -1
RETURN -1

go

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Hello all,
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Hi, the Microsoft SQL Server version is 2000


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Good Morning all.

Is it possible to put multiple expressions in one cell.



Here is an example of the expressions I'm using. I'm currently having to put them horizontally in a seperate cell.



=Count(IIf (Trim(Fields!NOB_Pickup_L_D_T.Value) = "Y", 1, Nothing))

=Count(IIf (Trim(Fields!NOB_Pickup_L_D_T.Value) = "N", 1, Nothing))

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N = 3

NA = 0



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Hi,

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well the real expression is:

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Good Morning all.

Is it possible to put multiple expressions in one cell.



Here is an example of the expressions I'm using. I'm currently having to put them horizontally in a seperate cell.



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N = 3

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Thanks,

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using System;

using System.Data;

using System.Data.SqlClient;

using System.Data.SqlTypes;

using Microsoft.SqlServer.Server;

using System.Text.RegularExpressions;



public partial class RegExTest

{

[Microsoft.SqlServer.Server.SqlFunction(IsDeterministic = true, IsPrecise = true)]

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{

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}

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use northwind

go

declare @teststring varchar(50),

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@out varchar(50)

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set @out = dbo.RegExMatch(@pattern, @teststring )

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select @pattern

select @out



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Greetings my SSIS friends,

Apologies for asking a similar question again but I am still non the wiser with this problem!

Let me explain to you my situation and the method I've adopted to try and solve it.

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The idea is to retrieve new data each time the package is run. We will know this because the result_IDs in the source table will be greater than the maximum result_ID in my destination table . The way the package should work is like this :

1) Retrieve maximum result_ID from destination table

2) retrieve data from source table where result_ID > maximum result_ID from destination table.



My package consists of a

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2) A Data flow task with a Datareader source adapter which uses an expression to retrieve the data. My expression looks like this : "select * from result where result_id > " + (dt_str, 10, 1252) @[User::max_result_id]

When I run my package the first time all the rows are retrieved (as my destination table is empty to begin with). BUT when I run it the second time the same thing happens again!! All rows are retrieved.

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Thanks for your help in advance.

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Hi guys,

I know its not a good idea to give you a big query...but/...

I have a query (given below) with Common table expressions. It is giving me error : The multi-part identifier "dbo.tmpValidServices_ALL.Service" could not be bound. for all the fields .. Do you have any idea.. I fed up with analysing query.. made me mad.. please help me...

 

----------------------------------------------

DECLARE @sql nvarchar(MAX), @paramlist nvarchar(4000)

SET @sql = 'WITH Q1 (SiteID,Programme,Complete,PID,COC,NotionalSum,TVMinsSUM,Postcode,Suburb,Qty)
AS

(SELECT
 dbo.tmpValidServices_ALL.SiteID,
 dbo.tmpValidServices_ALL.Programme,
 dbo.tmpValidServices_ALL.Complete AS Complete,
 dbo.tmpValidServices_ALL.RID AS PID,
 dbo.tmpValidServices_ALL.COC# AS COC,
 (dbo.lkpService.Notional$) AS NotionalSum,
 (TVMins) AS TVMinsSUM,
 dbo.tmpDemographics_ALL.Postcode,
 dbo.tmpdemographics_ALL.Suburb,
                count(*) as Qty

FROM  lkpService

INNER JOIN dbo.tmpValidServices_ALL vs  ON dbo.lkpservice.code = dbo.tmpValidServices_ALL.Service
INNER JOIN dbo.tmpDemographics_ALL ON dbo.tmpValidServices_ALL.RID = dbo.tmpDemographics_ALL.RID '

IF @COCGroup IS NOT NULL
SELECT     @sql = @sql + 'LEFT OUTER JOIN dbo.lkpCOC c ON dbo.tmpValidServices_ALL.COC = c.pvcode '

SELECT     @sql = @sql + 'LEFT OUTER JOIN dbo.lkpAgency ag ON vs.SiteID = ag.EXACT# '      

SELECT     @sql = @sql + 'WHERE dbo.lkpService.Schedule = @Schedule '

 IF @StartDate IS NOT NULL
     SELECT     @sql = @sql + ' AND (dbo.tmpValidServices_ALL.Complete  >= @StartDate ) '

 IF @EndDate IS NOT NULL
      SELECT     @sql = @sql + ' AND (dbo.tmpValidServices_ALL.Complete <= @EndDate ) '


 IF @SiteID IS NOT NULL
       SELECT     @sql = @sql + 'AND (ag.EXACT# = @SiteID) '

 IF @COCGroup IS NOT NULL
 SELECT     @sql = @sql + ' AND (c.pvcode = @COCGroup OR c.pvcode IN (SELECT COC FROM lkpCOCGroup WHERE COCGroup = @COCGroup)) '

 IF @Provider IS NOT NULL
 SELECT     @sql = @sql + 'AND (dbo.tmpValidServices_ALL.Provider = @Provider) '

 IF @Postcode IS NOT NULL
SELECT     @sql = @sql + 'AND (dbo.tmpdemographics_ALL.Postcode = @Postcode) '

SELECT     @sql = @sql  + ' GROUP BY dbo.tmpValidServices_ALL.SiteID,
                                                              dbo.tmpValidServices_ALL.Programme,
                                                              dbo.tmpValidServices_ALL.Complete ,
                                                              dbo.tmpValidServices_ALL.RID , 
                                                              dbo.tmpValidServices_ALL.COC# ,
                                                              dbo.tmpDemographics_ALL.postcode, 
                                                              dbo.tmpdemographics_ALL.Suburb,
                                                              (dbo.lkpService.Notional$),
                                                              (dbo.lkpService.TVMins)  ) 

SELECT COUNT(DISTINCT PID + CAST(Complete AS varchar(20))  + CAST(COC AS varchar(20)) + CAST(SiteID AS varchar(20)) + CAST(Programme AS varchar(20))) AS Visits,
 COUNT(DISTINCT PID + CAST(SiteID AS varchar(20)) + CAST(Programme AS varchar(20))) AS Patients, 
 COUNT(DISTINCT  CAST(COC AS varchar(20)) + CAST(SiteID AS varchar(20)) + CAST(Programme AS varchar(20)) + CAST(PID AS varchar(20))) AS COCs,
 SUM(NotionalSum) AS NotionalSum,
 SUM(TVMinsSUM) AS TVMinsSUM,Postcode,Suburb,sum(Qty) as Qty
 
FROM Q1

Group by Postcode,Suburb

Order by Postcode,Suburb  '

SET              @paramlist = '@SiteID as numeric,
@COCGroup as varchar(20),
@Postcode as varchar(20),
@StartDate DateTime,
@EndDate DateTime,
@Schedule varchar(20),
@Provider varchar(20)'
                     
 EXEC sp_executesql @sql, @paramlist, @SiteID, @COCGroup, @Postcode, @StartDate, @EndDate, @Schedule, @Provider

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This seems so obvious, but is causing me a lot of trouble:

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With the extra line:

"M","SFH","Single Family Mortgage Loans","Single Fam Mtg"

"M","MFH","Multifamily Mortgage Loans","Multi-Fam Mtg"

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Without the extra line:

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"M","MFH","Multifamily Mortgage Loans","Multi-Fam Mtg"
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Seems to me it should be possible to set up a single FlatFile connection to handle both these formats, but it's not easy.

I can easily manually edit the FlatFile connection and change the "RowDelimiter" to either "{CR}{LF}" or "{CR}{LF}{CR}{LF}" and the package runs against the corresponding flat file.

However, when I try to use an expression (@[User::StrRowDelimiter]) to set the RowDelimiter to the value of a package variable, the expression is completely ignored.

I can only change the RowDelimiter property on the FlatFile connection by manually opening the editor on the connection and changing it to match the incoming file.

Why isn't this connection seeing the expression I've set up for its RowDelimiter property?

Thanks for any help!



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Does anyone have any ideas on quickly getting a list of all expressions used in a package? For the BIDSHelper add-in (http://www.codeplex.com/bidshelper) we need to get a list of all the expressions used in the package and update the list whenever an expression is added through the IDE. Currently, we are iterating through the package, and checking every property of every task to see if it has an expression. On big packages, this is slow, as you might imagine.



Any suggestions would be appreciated. Maybe one of our MVPs could flag this for Microsoft follow-up, to see if they have any suggestions.

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Jan 12, 2007

I am using the unpivot transformation, but I can't figure out how to use an expression in the Pivot Key Value.

The denormalized table I want to unpivot has columns like Sunday_Qty, Monday_Qty, Tuesday_Qty, etc. Just before the unpivot component, I inserted a derived column component that adds fields like DateSun, DateMon, DateTue, etc. that resolves to values like 01/07/2007, 01/08/2007, etc.

So for the various rows in the Unpivot Transformation Editor, I entered DateSun, DateMon, DateTue, etc. for the Pivot Key Value, and "EntryDate" for the pivot key value column name.

The data pipeline gets unpivoted correctly, but the rows have the literal values "DateSun", "DateMon", etc. in the EntryDate column.

How do I tell SSIS to use the DateSun column instead of the string "DateSun"?

-Larry

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