Do Not Keep NULLS Using SSIS Bulk Insert Task - Insert Empty Strings Instead Of NULLS

May 15, 2008

I have two SSIS packages that import from the same flat file into the same SQL 2005 table. I have one flat file connection (to a comma delimited file) and one OLE DB connection (to a SQL 2005 Database). Both packages use these same two Connection Managers. The SQL table allows NULL values for all fields. The flat file has "empty values" (i.e., ,"", ) for certain columns.

The first package uses the Data Flow Task with the "Keep nulls" property of the OLE DB Destination Editor unchecked. The columns in the source and destination are identically named thus the mapping is automatically assigned and is mapped based on ordinal position (which is equivalent to the mapping using Bulk Insert). When this task is executed no null values are inserted into the SQL table for the "empty values" from the flat file. Empty string values are inserted instead of NULL.

The second package uses the Bulk Insert Task with the "KeepNulls" property for the task (shown in the Properties pane when the task in selected in the Control Flow window) set to "False". When the task is executed NULL values are inserted into the SQL table for the "empty values" from the flat file.

So using the Data Flow Task " " (i.e., blank) is inserted. Using the Bulk Insert Task NULL is inserted (i.e., nothing is inserted, the field is skipped, the value for the record is omitted).

I want to have the exact same behavior on my data in the Bulk Insert Task as I do with the Data Flow Task.

Using the Bulk Insert Task, what must I do to have the Empty String values inserted into the SQL table where there is an "empty value" in the flat file? Why & how does this occur automatically in the Data Flow Task?

From a SQL Profile Trace comparison of the two methods I do not see where the syntax of the insert command nor the statements for the preceeding captured steps has dictated this change in the behavior of the inserted "" value for the recordset. Please help me understand what is going on here and how to accomplish this using the Bulk Insert Task.

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Am I right in assuming that when I have a column where all fields contain NULL, this does not increase the total data storage size if my database? Also, what kind of impact would it have on performance?

And what if I inserted "" in varchar columns? I would think the increase in size would be marginal?

The reason I'm asking is that I want to use an existing table and stored procedures for another purpose, but only need half of the columns. But it would significantly simplify application development.

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Apr 18, 2008



Hello,

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Hi, ALL





I have a confusion with Bulk Insert task for several days.
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Now when i run this task where does these txt file will be pulled from. Does it pulls from local server (SER1) or does it goes to SERV2 looking for txt file.

I tried several combinations of moving files to different servers, yet i have no conclusions.

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 Option 1:     Presently implemented:
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<error: an exception of type: {System.Data.SqlTypes.SqlNullValueException} occurred>            Integer IsNull   True     Boolean
 
Option 2:
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Option 3:
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Any advice would be greatly appreciated! 
 
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Craig
CTARP2
 

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I'm a developer working on PHP - MSSQL 2008 combined platform. While running a procedure from a webpage I'm encountering the error as below.

My Query:
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Error
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Though the same query when run from SSMS runs fine:

Execute S_AccountsBatchActivation
@FirstName='abc',
@LastName='abc',
@Address='abc',
@City='abc',
@State='abc',
@Country='India',
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@BatchId=6502

[code]...

On my end I've tried out with ANSI_NULL AND ANSI_NULLS settings being both ON and OFF but it didn't worked.

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Hi,

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hi



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 i got some bulk insert tasks in SSIS inserting into some tables with identity set ON....

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now my steps are prepare database -> create database -> bulk insert into tables

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