Replacing NULL Characters From Within A Flat File With Script?
Jul 25, 2007
Here's one for the group:
I have a fixed-width flat file. Within some of the rows, I have embedded NULL characters. The inherit problem is that NULL characters are string terminators, so using a flat file source doesn't allow the capturing of these NULL characters or any characters after the first NULL character -- only the string up to the NULL character.
So, within SSIS, what would be the best way to replace NULL characters with a SPACE character? My file is fixed-width, and replacing with a space will allow me to keep the length the same. I am not opposed to running a script task against the file first (before using my flat file source), but would need some guidance as I'm not a .Net guru, by any means.
Unfortunately, going to the bank to have them correct this file has proved fruitless. We're going to have to deal with these characters on our side.
Thanks,
Phil
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May 16, 2008
Guys ,
I have generated a pipe delimited file using bcp option.
I am getting the ouput for some columns as some some special characters(boxes). When ,I have checked my source data in few columns the data is stored with single space.I can see this special character when opening with editplus only not with notepad.
This flat file will be used to load into oracle table.because of this reason all the rows are failing.
Do ,I need to fix this space issue in my stored procedure
Any suggestions.. to avoid this special character when generating the flatfile.
thanks in advance
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Mar 15, 2006
I have a flat file that has fields delimited by tilde {~} and rows delimited by {CR}{LF}. The problem is, my source is spitting out the {NULL} (&H00) at the end of the row.
The data displays correctly in the pre-viewer (with a non-print symbol at the end of the last field), but gives an error when I try to run the package.
Example:
data?~?data?~?data?{NULL}{CR}{LF}
I can process the row in c# using:
?
as the row delimiter. What is the equivalent notation for SSIS?
Thanks,
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Feb 6, 2008
Hi,
In my flat file for some columns I dont have values so it contains empty, novalue. Then When exporting those column values int oSqlserer table column, SSIS is giving the error. How to solve this?
Thanks
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Mar 2, 2007
How could I specify in either FF Connection manager or source that it shouldnt give any error and assume blank or no value as NULL ?
Thanks,
Fahad
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Aug 13, 2004
I am incorporating a perl script loading data into my SQL Server. If I receive a message with a single backslash I know to replace it with a double backslash \. But what if it is a " double quote what do I need to do to get it to appear as is?
Thanks
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Oct 22, 2007
Hi,
I have the following problem: I'm connected to flat file source and trying to read data that is later inserted in an MS Access database. Everything wokrs fine instead of one thing - when I have null values in the flat file, I want those NULL values to be inserted in the MS Access db, instead of that what happens is that I actually get the default values for a column type from the flat file and later insert that defalut value. For example if I have a null value in an four-bite-signed-integer column of the flat file, I get 0 as value.
I thouth of solution using a "Derived Column" transformation which can transform the zeros into nulls, but decided to check with you guys if there is a smarter thing to do (for example to edit the flat file source to read the NULLs correctly).
Any advice is appreciated! Many thanks
Ventsy
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Nov 27, 2007
Hi all,
I am facing a problem on validating the data from a flat file while inserting the data into the destination table of sql server 2005 database. In my package, i have to validate the input data whether the values are coming as null or not, before inserting into the destination database. The flat file may not contain data for all NOT NULL columns. I have to find out that row(s) and reject the record. If the rows are coming as Null for the Not Null columns, the OLEDB Destination throws OLEDB exception for the constraint.
To resolve this, i have an script component in data flow, to check whether the input data is coming as null. I have added the output column of boolean type to the script component, it will be assigned to TRUE when there is null for the Not Null column in the script.
And in the follwing conditional split, i am checking the flag for TRUE to reject the record.
Is there any other way to handle this validation?
Regards
Madhav
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Aug 15, 2006
Hi,
In SSIS flat file import using fastload, I'm trying to import data into SQL 2005 previously created tables.
The table may contain column that are NULLable BUT there is NO DEFAULT for them.
If the incoming data from flat files contains nothing either between the delimeters, how can I have a NULL value inserted in the column instead of blank/empty string?
I didn't find an easy flag unless I'm doing something wrong. I know of at least two ways to do it the hard way:
1- set the DEFAULT(NULL) for EVERY column that needs this behaviour
2-set up some Derived Column option in the package to return NULL if the value is missing.
Both of the above are time consuming since I'm dealing with many tables. Is there a quick option to default the value to NULL WHEN there is NO data ELSE insert the data itself? So the same behavior that I have right now except that I want NULL in place of empty string/blank in the varchar(x) columns.
Thanks
Anatole
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Dec 4, 2006
i'm trying to figure out a way to replace a handful of "Illegal" characters in our SQL tables. We are using Project Server and some of these characters are causing errors or other issues in OLAP Cube.
I'm trying to figure out a way to change the following characters to an underscore ( _ ) :
illegal characters are: / ( ) . , ' : - &
Can I just create a SQL query that loops through a column to replace all of these characters at once? or do I have to replace one character at a time?! I tested replacing one at a time and it works with the REPLACE function.
I'm not all that familiar with MSSQL, I've spent past few years working with MySQL instead.
how can my query loop? or would using CASE help me out?
thanks. any feedback is much appreciated. If you need to know more, let me know.
regards
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Jul 20, 2005
I have a large table, tblMessage, which stores e-mail messages in textfields. I need to remove the carriage returns the data in these fields,but I have not yet figured out how to do so.I thought that the way to do this would be with the REPLACE function;unfortunately, of course, the REPLACE function cannot work with TEXTfields. I tried CASTing the text field to VARCHAR(8000); however, someof the rows have more than 8000 characters in the text field, so it bombs.Here is the SQL that I tried:selectmsgID,msgSent,msgFromType,msgFromID,msgSubject,REPLACE (CAST(msgMessage AS varchar(8000)), CHAR(13), '<BR>') ASnewMessage,msgOriginal,attIDinto tblMessageNewfrom tblMessageI'm at my wit's end. Truncating the text field to 8000 character is anacceptable option, but I can't even seem to be able to do that.I'm using SQL Server version 7.
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Nov 13, 2001
Hi,
this is my second attempt to get an answer to this question.
We want to strip our firstName column and lastname column of any punctuation that might be present.
What's the best of doing that?
Is my only choice to write a nested REPLACE for each character we want replaced (which will end up being very very long) or is there another way.
thanks
Zoey
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Oct 6, 2015
When we are getting data in a table and we want to replace characters with other characters. For example, We have a table with a street address, and there are numerous ascii character values we want to review and replace if they exist. We were looking at using a table with 2 columns, 1 containing each ascii character value the other it's preferred replacement value. Then updating the street address searching through each ascii character and replacing it if needed. Currently, we are running it through a looping process searching each individual address for each ascii character, and updating it.
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Jan 20, 2014
I have a problem where I want to write a function to remove recurring characters from a string and replace them with a single same character.
For instance I have the string '12333345566689' and the result should be '12345689'. In Oracle I could do this with "regexp_replace('12333345566689', '(.)1+', '1')", but in T-SQL the only solution I could think of is something like this:
DECLARE @code NVARCHAR(255)
SET @code = '12333345566689';
SET @code = REPLACE(REPLACE(REPLACE(@Code, '1', '~1'), '1~', ''), '~1', '1');
and repeat this for 2 - 9. But I'm sure there is a more elegant version for this in SQL Server 2012.
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Aug 24, 2007
Hi,
I am testing SSIS and have created a Flat File Destination. I defined the Flat File Connection as New for the first time and it worked fine. Now, I would like to go back and modify the Flat File Connection in the Flat File Destination Editor, but it allows only to create a New connection rather allowing me to edit the existing one. For testing, I can go back and create a new connection, but if my connection had 50-100 columns then it would be an issue to re-create it from scratch.
Did someone else faced this issue?
Thanks,
AQ
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Dec 27, 2006
Hi,
I have a situation where a tab limited text file is used to populate a sql server table.
The tab limited text file comes from a third party vendor. There are fixed number of columns we need to export to the sql server table. However the third party may add colums in the text file. Whenenver the text file has an added column (which we dont need to import) the build fails since the flat file connection manager does not create the metadata for it again. The problem goes away where I press the button "Reset Columns" since it builds the metadata then. Since we need to build the tables everyday we cannot automate it using SSIS because the metadata does not change automatically. Is there a way out in SSIS?
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May 11, 2006
I am transferring data from an OLEDB source to a Flat File Destination and I want the column width for all of the output columns to 30 (max width amongst the columns selected), but that is not refected in the Fixed Width Flat File that got created. The outputcolumnwidth seems to be the same as the inputcolumnwidth. Is there any other setting that I am possibly missing or is this a possible defect?
Any inputs will be appreciated.
M.Shah
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Jul 23, 2007
Hello,
I'm using the query wizard in VB.net to write a query for SQL CE. I want to replace null values with text. I expected the COALESCE function to do this but I get an error message saying its not a valid function. This is a sample.
Select COALESCE(table.Name,'No Name') as Name from table
Any help appreciated
Thanks
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Apr 13, 2007
Hi,
I am newbie to reporting services and I need some help. Could any one please let me know how to replace Null value with 0 in the data section of the Matrix. I don't want blanks to be displayed on the report, I want those to be replaced with 0's.
Thanks for your time.
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Dec 18, 2006
Hi,I have some tables where I import data in, lots of field have gotten aNULL value which the application can not handle.Now can I replace each NULL value with '' in a columns with:update <tableset [<column>] = '' where [<column>] IS NULLBut because there are lots of columns this is pretty much work, alsothere are multiple tables.Is there an easy way to replace all NULL values in all columns in atable?Thanks in AdvanceBob
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Nov 10, 2006
Hi all,
I m using SSIS and i am transfering the data from Flat File Source to the OLE DB destination File. The source file contain some corrupt data which i am transfering to the other Flat file destination file.
Debugging is succesful but i am not getting any error output in the Flat file destination file.
i had done exactly which is written in the msdn tutorial of SSIS.
Plz tell me why i am not getting the error output in the destination flat file?
thanx
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Feb 6, 2003
Hi,
Im having a couple of problems with SQL.
I have this query...
SELECT Band.Name, Member.Name
FROM Member
JOIN MemberOf ON Member.Mid = MemberOf.Mid
JOIN Band On MemberOf.Bid = Band.Bid
WHERE MemberOf.Instrument = 'keyboards';
which basically shows me the name of the bands who had keyboard players. I would like it to also display the names of the band who didnt have keyboard players, replacing the keyboard players name with "NULL".
so... my questions are :)
how do u get it to display the records that do not match the condition, and how do u get it to replace the keyboard players name with "NULL" when they do not match the condition.
PS. The three tables are
Band. Which has Bid as a primary key.
Member. Which has Mid as a primary key.
MemberOf. Which links these through its two foreign keys Mid and Bid.
Thanks for your help! (assuming someone does)
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Feb 11, 2008
First, a couple of important bits of information. Until last week, I had never touched SISS, and therefore, I know very little about it. I just never had the need to use it...until now. I was able to convert my first 3 flat files to SQL2005 tables by right clicking on "SISS Package" and choosing "SISS Import and Export Wizard". That is the extent of my knowledge! So please, please, please be patient with me and be as descriptive as possible.
I thought I could attach some sample files to this post, but it doesn't look like I can. I'll just paste the information below in two separate code boxes. The first code box is the flat file specifications and the second one is a sample single line flat file similar to what I'm dealing with (the real flat file is over 2 gigs).
My questions are below the sample files.
Code Snippet
Record Length 400
Positions Length FieldName
Record Type 01
1,2 L=2 Record Type (Always "01")
3,12 L=10 Site Name
13,19 L=7 Account Number
20,29 L=10 Sub Account
30,35 L=6 Balance
36,37 L=1 Active
37,41 L=5 Filler
Record Type 02
1,2 L=2 Record Type (Always "02")
3,4 L=2 State
5,30 L=26 Address
31,41 L=11 Filler
Record Type 03
1,2 L=2 Record Type (Always "03")
3,6 L=4 Coder
7,20 L=14 Locator ID
21,22 L=2 Age
23,41 L=19 Filler
Record Type 04
1,2 L=2 Record Type (Always "04")
3,9 L=7 Process
10,19 L=10 Client
20,26 L=6 DOB
26,41 L=16 Filler
Record Type 05
1,2 L=2 Record Type (Always "05")
3,16 L=14 Guarantor
17,22 L=6 Guar Account
23,23 L=1 Active Guar
**There can be multiple 05 records, one for each Guarantor on the account**
and the single line flat file...
Code Snippet
01Site1 12345 0000098765 Y 02NY1155 12th Street 03ELL 0522071678 29 04TestingSmith,Paul071678 05Smith, Jane 445978N 05Smith, Julie 445989N 05Smith, Jenny 445915N 01Site2 12346 0000098766 N 02MN615 Woodland Ct 04InfoJones,Chris 012001 01Site3 12347 0000098767 Y 02IN89 Jade Street 03OWB 6429051282 25 04Screen New,Katie 879500
As you can see, each entry could have any number of records and multiples of some of the record types, with one exception, every entry must have a "01" record and can only have one "01" record. Oh, and each record has a length of 400.
I need to get this information into a SQL 2005 database so I can create a front end for accessing the data. Originally, I wanted one line for each account and have null values listed for entries that don't have a specific record. Now that I've looked at the data again, that doesn't look like a good idea. I think a better way to do it would be to create 5 different tables, one for each record type. However, records 2 through 5 don't have anything I can make a primary key. So here are my questions...
Is it possible to make 5 tables from this one file, one table for each of the record types?
If so, can I copy the Account number in record 01, position 13-19 in each of the subsequent record types (that way I could link the tables as needed)?
Can this be done using the SISS Import and Export Wizard to create the package? If not, I'm going to need some very basic step by step instructions on how to create the package.
Is SISS the best way to do this conversion or is there another program that would be better to use?
I know this is a huge question and I appreciate the help of anyone who boldly decides to help me! Thank you in advance and I welcome anyone's suggestions!
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May 14, 2015
I'm copying files to a folder with the naming convention as follows in the source folder:
CM_ABC_MY_TEST.txt
In the destination folder, this filename needs to appear as:
CM_XYZ_MY_TEST.txt
In my File System Task, I'm pretty sure I'm going to need an expression with a replace, substring, etc. But am having a hard time nailing down the exact syntax.
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Mar 13, 2006
How can I take this example Flat file and parse out each section to a new flat file? Each section starts with HD (header row)
http://www.webfound.net/flat_file_example.txt
e.g. an example output file based on above (cutting out the first section) would be:
http://www.webfound.net/flatfile_output.txt
Also, I'll need to grab a certain value in each header row (certain position in the 100 byte header row) to use that as part of the filename that's outputed. I assume it would be better to insert these rows into a temp table then somehow do a search on a specific position in the row...but that's impossible? The other route is to insert each row into a temp table separated out by fields but that is going to be too combursome because we have several formats to determine separation of fields based on the row type so I'd have to create many temp tables and many components in SSIS when all we want to do is again:
1) output each group (broken by each header row) into it's own txt file
2) use a field in the header row as part of the name of the output txt file (e.g. look at the first row, whcih is a header row in flat_file_example. txt. I want to grab the text 'AR10' and use that as part of the filename that I create
Any suggestions on how to approach this whole process in SSIS...the simplest approach that will work ?
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Aug 9, 1999
If I create a row with a nullable text column whose initial value is null and then update the column with a value that is exactly 256 characters long, the value remains null. Once I update the column to any other value (including null), it works as expected. I have not yet seen a way around this.
I am working in 6.5 SP3.
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Sep 3, 2015
I have an SSIS package that imports data from an Excel file, replaces any value in Excel that reads "NULL" to "", then writes the data to a couple of databases.
What I have discovered today, is I have two columns of dates, an admit date and discharge date column, and what I need to do is anywhere I have a null value in the discharge date column, I have to replace it with the value in the admit date column.
I have searched around online and tried a few things using the Replace funtion in Derived columns but no dice so far.
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Jun 23, 2015
I have a package in which there are only one Data flow Task and it has only three components. 1) Source , which is a SQL db 2) destination and 3) OLE DB Destination flat file Error output file. I want the error file to be created ONLY if there is any error while dumping the data into destination DB. But , the issue is, the error flat file is being created inspite of No error while dumping the data from Source to Destination.
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Jul 24, 2015
Need to know how I can get the dynamic filename created in the FlatFile destination for insert into a package audit table?
Scenario: Have created a package that successfully outputs Dynamiclly named flat files { Format: C:Test’Comms_File_’ + ‘User::FileNumber’+’_’+Date +’.txt’
E.g.: Comms_File_1_20150724.txt, Comms_File_2_20150724.txt etc} using Foreach Loop Container :
* Enumerator Set to: “Foreach ADO Enumerator” with the ADO object source variable selected to identify how many total loop iterations there are i.e. Let’s say 4 thus 4 files to be created
*Variable Mappings : added the User::FileNumber – indicates which file number current loop iteration is i.e. 1,2,3,4
For the DataFlow task have a OLDBSource and a FlatFile Destination where Flat File ConnectionString is set up as:
@[User::Output_Path] + "Comms_File"+ @[User:: FileNumber] +"_" + replace((DT_WSTR, 10) (DT_DBDATE) GETDATE(),"-","")+ ".txt"
All this successfully creates these 4 files:
Comms_File_1_20150724.txt, Comms_File_2_20150724.txt, Comms_File_3_20150724.txt, Comms_File_4_20150724.txt
Now the QUESTION is how do I get these filenames as I need to insert them into a DB Audittable. The audit table looks like this:
CREATE TABLE dbo.MMMAudit
(
AuditID INT IDENTITY(1, 1) NOT NULL,
PackageName VARCHAR(100) NULL,
FileName VARCHAR(100) NULL,
LoadTime DATETIME NULL,
NumberofRecords INT NULL
)
To save the Filename & how many records in each file in our Audit Table, am using an Execute SQL Task and configuring it as this:
Execute SQL Task
Parameter mapping - Mapped the User Variable (RecordsInserted) and System Variable( PackageName) to Insert statement as shown below
SQLStatement: INSERT INTO [dbo].[MMMAudit] (
PackageName,NumerofRecords,LoadTime)
(?,?.GETDATE)
Again this all works terrific & populates the dbo.MMMAudit table as shown below BUT I also need to insert the respsctive file name – How do I do that?
AuditID PackageName FileName NumberOfRecords
1 MMM NULL 12
2 MMM NULL 23
3 MMM NULL 14
4 MMM NULL 1
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Apr 14, 2014
I need find out the number of columns in flat file before i process that particular file.I have file name in @filename variable and file path is @filepath variable.But do not not that how i will check the column name in before i will process that file.
@filePath = C:DatabaseSourceFilesCAHCVSSourceFiles
And i am using for each loop container to read the file one by one and put the file name in @filename variable.and my file name like
Product_20120607060930.txt
Product_20130708060930.txt
[code]....
Now what i have to do is i need to make sure that ID,Name,City,County,Phone is there in flat file.if it is not there then i have to send mail to client saying that file is not valid.I need to also calculate the size of flat file.
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Jan 31, 2008
What is the easiest way to accomplish this task with SSIS?
Basically I have a stored procedure that unions multiple queries between databases. I need to be able to export this to a text file on a daily basis and add a total records: row to the end of the text file.
Thanks in advance for any help.
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May 13, 2008
Hello Experts,
I am createing one task (user control) in SSIS. I have property grid in my GUI and 2 buttons (OK & Cancle).
PropertyGrid has Properties like SourceConnection, OutputConnection etc....right now I am able to populate Connections in list box next to Source and Output Property.
Now my question to you guys is depending on Source Connection it should read that text file associated with connection manager. After validation it should pick header (first line of text file bases on record type) and write it into new file when task is executed. I have following code for your reference. Please let me know I am going in right direction or not..
What should go here ?
->Under Class A
public override DTSExecResult Execute(Connections connections, VariableDispenser variableDispenser, IDTSComponentEvents componentEvents, IDTSLogging log, object transaction)
{
//Some code to read file and write it into new file
return DTSExecResult.Success;
}
public const string Property_Task = "CustomErrorControl";
public const string Property_SourceConnection = "SourceConnection";
public void LoadFromXML(XmlElement node, IDTSInfoEvents infoEvents)
{
if (node.Name != Property_Task)
{
throw new Exception(String.Format("Invalid task element '{0}' in LoadFromXML.", node.Name));
}
else
{
try
{
_sourceConnectionId = node.Attributes.GetNamedItem(Property_SourceConnection).Value;
}
catch (Exception ex)
{
infoEvents.FireError(0, "LoadFromXML", ex.Message, "", 0);
}
}
}
public void SaveToXML(XmlDocument doc, IDTSInfoEvents infoEvents)
{
try
{
// // Create Task Element
XmlElement taskElement = doc.CreateElement("", Property_Task, "");
doc.AppendChild(taskElement);
// // Save source FileConnection
XmlAttribute sourcefileAttribute = doc.CreateAttribute(Property_SourceConnection);
sourcefileAttribute.Value = _sourceConnectionId;
taskElement.Attributes.Append(sourcefileAttribute);
}
catch (Exception ex)
{
infoEvents.FireError(0, "SaveXML", ex.Message, "", 0);
}
}
In UI Class there is OK Click event.
private void btnOK_Click(object sender, EventArgs e)
{
try
{
_taskHost.Properties[CustomErrorControl.Property_SourceConnection].SetValue(_taskHost, propertyGrid1.Text);
btnOK.DialogResult = DialogResult.OK;
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
#endregion
}
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Oct 24, 2007
Hi all,
In a foreachloop, I am inserting records into a flat file which is working fine. But the thing is that as the file grows, it takes longer for it to locate the EOF(End of File) of the flat file so as to insert the records.
I have around 70-100 lines written to the file at each loop and there are more than 20k records to be looped. wihich means that at the end I should be having 1400k - 20000k line in the text file.
One solution would be to insert the records at the start of the file itself so that it does not has to lookup the EOF each time before writting.
Another would be to generate separate files and then merge it.
Any idea how can this can be done?
Beside this I have to zip the file and then SFTP to a given address.
Any suggestion or help would be welcome.
Rdgs
David
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