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• SSIS - Can I get the column schema for a flat file source from a database?

  - by Steve Clement

  We receive a nightly data export from a vendor in the form of about 10 tab-delimited flat file without column headers. In addition, the vendor provides us with the SQL scripts for the database tables so that we can import the files into our system. Unfortunately, the vendor recently changed the schema for the flat files. Each file has upwards 150 columns, and having to go through the DB schema and adjust column types on a Flat File Data Source in SSIS is extremely time consuming, not to mention a royal pain. Since I know the file data layout in the database schema, is there any way I can dynamically pull that into a Flat File source to set the columns correctly? Or am I just stuck with manually setting everything?

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• Is it possible to dynamically set a static string during compile?

  - by LonnieBest

  I'm trying to dynamically create a connection string during compile time: public static string ConnectionString { get { string connectionString = @"Data Source=" + myLibrary.common.GetExeDir() + @"\Database\db.sdf;"; return connectionString; } } I keep running into type initialisation errors. I was trying to avoid having to set the connection string for all applications that user my code library. The location of the database is different for each project that uses the library. I have code that can determine the correction string, but was wanting run it during compile time. Is this even possible?

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• NHibernate and hbm2dll update attribute

  - by michael lucas

  Hi, i'm using NHibernate with Sdf database. In my hibernate.cfg.xml file i've set: <property name="hbm2ddl.auto" value="update"/> But this does not seem to work at all. "Update" attribute should make NHibernate generate missing tables and columns during application launch, but it does not happen. If i want missing tables geenrated I have to set hbm2dll.auto property to "create" which is not an option for me since it drops existing db content beforehand. I experienced the same problem with PostgreSql problem. Am I missing something?

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• VS compiling Error 1256 ( integer overflow in internal computation ... ) during inheritance

  - by odbb

  Hi there, my problem occurs during compiling Irrlicht3D Engine in VS 2008. 1Error 1256: integer overflow in internal computation due to size or complexity of "irr::IReferenceCounted" I'm currently merging a very old Softwaredriver I have written with the rest of the engine which is much newer. The main Problme is that I have tried to resolve abstract inherince problems. But now I get this error and it is the only one. "irr::IReferenceCounted" is one of the base classes used by other classes which have been inherinced from. What does that mean? I know that an integer overflow can be a normal overflow, but why is this shown during compilation? Any help appreciated! -db

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• update columns when value is numeric in tsql

  - by knittl

  i want to normalize date fields from an old badly designed db dump. i now need to update every row, where the datefield only contains the year. update table set date = '01.01.' + date where date like '____' and isnumeric(date) = 1 and date >= 1950 but this will not work, because sql does not do short circuit evaluation of boolean expressions. thus i get an error "error converting nvarchar '01.07.1989' to int" is there a way to work around this? the column also contains strings with a length of 4, which are not numbers (????, 5/96, 70/8, etc.) the table only has 60000 rows

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• Oracle transaction read-consistency ?

  - by trojanwarrior3000

  I have problem understanding read consistency in db(oracle). Suppose I am manger of a bank . A customer has got lock (which I dont know) and is doing some updation. Now after he has got lock I am viewing account info of the same customer and try to do some thing on it.But because of read consistency I will see data as it existed before customer got the lock. So will not that affect inputs I am getting and the decisions that I am gonna make during that period?

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• How to retrieve Aggregate objects?

  - by Jebb

  In DDD, Repository takes care of saving and retrieving domain objects and also serves as collection of Aggregate Roots. My question is how do you retrieve the information for those child entities (let's say from DB) of an Aggregate where basic rule is Repository should just hold collection of Aggregate Roots (parent object) and not child objects? For example: User (parent object) Orders (child object) User domain object is stored in user table and Orders are stored in another table. Basically, retrieving a Domain Object could be like this: <?php $userRepos = new UserRepository(); $user = $userRepos->find($userId); ?> How then the child object (Orders) of User entity be retrieve to be as part of the User aggregate?

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• php echo json in foreach loop

  - by Vidya Sagar

  i have product ids like this 1,2,3 in $product_ids var $product_ids = explode(',', $product_ids); $product_ids = array_filter($product_ids); foreach ($product_ids as $key => $product_id) { $sth = $this->db->prepare("SELECT * FROM products Where id =:id "); $sth->execute(array( ':id' => $product_id )); $final_data = $sth->fetchAll(); echo json_encode($final_data); } how can i format json whit this code in for loop echo json not working is there any other way plz help

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• Multiple Servers with identical services

  - by Jerry Bailey

  I have a dozen servers in different locations all running the same web service application but each going against their own SQL Server DB. I am writing a desktop application that consumes the web services. I want to present the user with a drop down of all servers in the network that are running the same wweb service application. Do I have to add a ServiceReference for each of the servers running the web service app and thereby having as many proxies as there are servers? Or can a define a single instance of the services and dynamically build a list of endpoints to select from a drop down?

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• Invoices for Printing in MS-Access

  - by Nitrodist

  The application that I'm currently working on has a funky set up for the invoices that they print. The form is the invoice that is printed out. I took a look at the Northwind DB and what it does is and it actually generates a report based on the record's information. What are the limitations of using Forms vs. Reports for printing out reports? One of the limitations that I've run into so far is that the printed page is jam packed with information (all required) to fit on a single page, yet there is lots of wasted space for some stuff since elements on the page don't shrink or grow due to what's inputted into the textboxes. How are invoices designed for your applications? How do you handle space restraints for creating invoices?

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• NHibernate and SetSessionAuth audit columns

  - by user86431

  We have audit columns set by triggers. For obscure security reasons predating my tenure and out of my control, we log in with a generic user, and do a 'set session authorization' to change the user to the db user of the user who is logged in. When we converted to NHibernate, it creates a whole new session and jacks everything up when we try to do a set session auth, so we turned the set session auth off... Now we are trying to find out a way to get NHibernate to let us do 'set session authorization' without recycling the session on us, so we can use our existing trigger based audit column stuff with both legacy apps, and our new NHibernate apps. It's not a ideal soloution, or the best way to do it even, but is it possible? I was hoping there was a alternate interface that allowed this kind of access. Does anyone know how to do it, or can you point me towards and good hints? Thanks, Eric-

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• Jquery - return html as a string

  - by McNabbToSkins

  I am using the Jquery Wysiwyg editor and I am trying to capture the html that makes up the content area to store in a DB. Is there anyway to get html of a element and save it as a string? My code looks like tihs <iframe id="wysiwyg_IFrame> <html> <head></head> <body> <ul> <li>This is a test</li> </ul> </body> </html> </iframe> I would either like to get a string that starts with <html>....</html> or just the body <body>...</body> does anyone know if this is possible? Thanks

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• What's a good Perl OO interface for creating and sending email?

  - by aidan

  I'm looking for a simple (OO?) approach to email creation and sending. Something like $e = Email->new(to => "test <[email protected]>", from => "from <[email protected]>"); $e->plain_text($plain_version); $e->html($html_version); $e->attach_file($some_file_object); I've found Email::MIME::CreateHTML, which looks great in almost every way, except that it does not seem to support file attachments. Also, I'm considering writing these emails to a database and having a cronjob send them at a later date. This means that I would need a $e->as_text() sub to return the entire email, including attachments, as raw text which I could stuff into the db. And so I would then need a way of sending the raw emails - what would be a good way of achieving this? Many thanks

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• First Fluent NHibernate Project

  - by Andy

  I'm trying to follow the "Your first project" tutorial at http://wiki.fluentnhibernate.org/Getting_started and have hit a roadblock. When I try to run the console application, I'm getting this error: An invalid or incomplete configuration was used while creating a SessionFactory. Check PotentialReasons collection, and InnerException for more detail. I have created a SQLite database "firstProject.db" and referenced the full path to the file in the call to: return Fluently.Configure() .Database(SQLiteConfiguration.Standard .UsingFile(DbFile)) .Mappings(m => m.FluentMappings.AddFromAssemblyOf<Program>()) .ExposeConfiguration(BuildSchema) .BuildSessionFactory(); so I don't know what I'm doing wrong. What/where is this "PotentialReasons" collection? Thank you for the help. Andy

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• LINQ - Select Statement - The null value cannot be assigned to a member with type System.Int32 which

  - by thiag0

  I am trying to achieve the following... _4S.NJB_Request request = (from r in db.NJB_Requests where r.RequestId == referenceId select r).Take(1).SingleOrDefault(); Getting the following exception... Message: The null value cannot be assigned to a member with type System.Int32 which is a non-nullable value type. StackTrace: at System.Data.Linq.SqlClient.SqlProvider.Execute(Expression query, QueryInfo queryInfo, IObjectReaderFactory factory, Object[] parentArgs, Object[] userArgs, ICompiledSubQuery[] subQueries, Object lastResult) at System.Data.Linq.SqlClient.SqlProvider.ExecuteAll(Expression query, QueryInfo[] queryInfos, IObjectReaderFactory factory, Object[] userArguments, ICompiledSubQuery[] subQueries) at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execute(Expression query) at System.Data.Linq.DataQuery`1.System.Linq.IQueryProvider.Execute[S](Expression expression) at System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1 source) at DAL.SqlDataProvider.MarkNJBPCRequestAsComplete(Int32 referenceId, Int32 processState) I have verified that 'referenceId' does have a value. Anyone know why this would happen in a select statement? Thanks!

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• Merging MySQL Structure and Data

  - by Shahid

  I have a MySQL database running on a deployment machine which also contains data. Then I have another MySQL database which has evolved in terms of STRUCTURE + DATA for some time. I need a way to merge the changes (ONLY) for both structure and data to the DB in deployment machine without disturbing the existing data. Does anyone know of a tool available which can do this safely. I have had a look at a few comparison tools but I need a tool which can automate the merge operation. Note also that most of the data in the tables is in BINARY so I can't use many file comparison tools. Does any one know of a solution to this? thanks

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• DB2: Won't allow parameterize fetch first X rows only

  - by Guy Roth

  Although in Oracle DB its is allowed to parametrize the number of rows that the query can fetch by adding to the query: select ... from ... where ... and rownum <= @MaximumRecords I can't add similar condition to acuivalent query running in DB2: It is allowed to add: select ... from ... where ... fetch first 500 rows only (where there is fixed number of rows) but not: select ... from ... where ... fetch first :1 rows only (:1 == @MaximumRecords) Is someone aware of a solution/work-around to this problem?

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• function and class to show image not working in php

  - by Gully

  i am trying to get get the following working nothing is happen when i use the function i am trying to get it to display images class ItemRes { //items DB var $img=""; } function ShowItemImage($index,$res_a){ if(sizeof($res_a) > $index){ if($res_a[$index] != NULL) { $cimg = $res_a[$index]->img; return "<img src='$cimg' width='70' height='70' style='cursor:pointer'></img>"; } }else{ return "<center class='whitetxt'><strong>Empty</strong></center>"; } } $res_array = array(); $idx=0; $result21 = mysql_query("SELECT * FROM photos WHERE eid='$eid' ORDER BY id DESC") or die (mysql_error()); while ($row21 = mysql_fetch_array($result21)) { $img_path = $row21['path']; $obj = new ItemRes(); $obj->img = $img_path; $res_array[$idx] = $obj; $idx++; } ShowItemImage(0,$res_array) ShowItemImage(1,$res_array)

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• "Circuit breaker" for net.msmq?

  - by Alex

  Hi, The Circuit Breaker pattern, from the book Release It!, protects a service from requests while it is failing (or recovering). The net.msmq binding used with transactions give us nice retry and poison message capabilities. But I am missing the implementation of such a "Circuit breaker" pattern. A service is put under even heavier load by retries while it is already in a failure condition (like DB connectivity issues causing loads of blocked threads etc.). Anyone knows about a behavior extension or similar that explicitly closes the service host when defined failure thresholds have been exceeded? Cheers, Alex

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• When should I consider representing the primary-key ...?

  - by JMSA

  When should I consider representing the primary-key as classes? Should we only represent primary keys as classes when a table uses composite-key? For example: public class PrimaryKey { ... ... ...} Then private PrimaryKey _parentID; public PrimaryKey ParentID { get { return _parentID; } set { _parentID = value; } } And public void Delete(PrimaryKey id) {...} When should I consider storing data as comma-separated values in a column in a DB table rather than storing them in different columns?

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• Datagrid for Symfony?

  - by Stick it to THE MAN

  I want to use a datagrid in one of my modules (Symfony 1.3, Propel ORM). I have spent a while searching the web, but everything I found expects a direct connection to teh db (mySQL) or is otherwise unsuitable. I found the datagrid plugin (http://symfony.swisscenter.com/datagrid/exemples), but the documentation/examples are in French - and I'm not too keen on learning French just for the sake of using the plugin - besides, if all the users are French speakers, then it will be difficult to get support/help if/when I do hget stuck. So my questions are: Is anyone aware of a good (PHP) datagrid component that I can use with SF? Is anyone out there (English speaker), using the SF datagrid plugin?

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• Cannot Translate to SQL using Select(x => Func(x))

  - by Dan

  I'm slowly learning the ins and outs of LINQtoSQL, but this is confusing me. Here is the statement I have: IQueryable<IEvent> events = (from e in db.getEvents() select e).Select(x => SelectEvent(x, null)); What the SelectEvent does can be explained in this answer here. I am not using the .toList() function as I don't want potentially thousands of records brought into memory. public IEvent SelectEvent(SqlServer.Event ev, EventType? type) { // Create an object which implements IEvent // I don't have the code in front of me, so forgive the lack of code } My question is really for the Select() method. I get the "Cannot translate to SQL" error and the Select() is listed in the error message. Clueless on this one :-/.

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• How to retrieve MYSQL records as an INSERT statement.

  - by Aglystas

  I'm trying come up with the best method of synchronizing particular rows of 2 different database tables. So, for example there's 2 product tables in different databases as such... Origin Database product{ merchant_id, product_id, ... additional fields } Destination Database product{ merchant_id product_id ... additional fields } So, the database schema is the same for both. However I'm looking to select records with a particular merchant_id, remove all records from the destination table that have that merchant_id and replace those records with records from the origin database of the same merchant_id. My first thought was using mysqldump, parsing out the create table statements, and only running the Insert Statements. Seems like a pain though. So I was wondering if there is a better technique to do this. I would think mysql has some method of creating INSERT statements as output from a SELECT statement, so you can define how to insert specific record information into a new db. Any help would be appreciated, thank you much.

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• Instrumenting Database Access

  - by Whisk

  Jeff mentioned in one of the podcasts that one of the things he always does is put in instrumentation for database calls, so that he can tell what queries are causing slowness etc. This is something I've measured in the past using SQL Profiler, but I'm interested in what strategies other people have used to include this as part of the application. Is it simply a case of including a timer across each database call and logging the result, or is there a 'neater' way of doing it? Maybe there's a framework that does this for you already, or is there a flag I could enable in e.g. Linq-to-SQL that would provide similar functionality. I mainly use c# but would also be interested in seeing methods from different languages, and I'd be more interested in a 'code' way of doing this over a db platform method like SQL Profiler.

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• Updating records in Postgres using FROM clause

  - by Summer

  Hi, I'm changing my db schema, and moving column 'seat' from old_table to new_table. First I added a 'seat' column to new_table. Now I'm trying to populate the column with the values from old_table. UPDATE new_table SET seat = seat FROM old_table WHERE old_table.id = new_table.ot_id; This returns ERROR: column reference "seat" is ambiguous. UPDATE new_table nt SET nt.seat = ot.seat FROM old_table ot WHERE ot.id = nt.ot_id; Returns ERROR: column "nt" of relation "new_table" does not exist Ideas?

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