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• Properties.Settings Ambiguity after adding LINQ to SQL

  - by Emmanuel Smith

  I have recently linked a database to my C# service by creating a LINQ to SQL item in my solution. Everything was fine and dandy as I was continuing to code, but then I suddenly noticed that there where 16 Ambiguity errors. e.g. Ambiguity between 'EmailService.Properties.Settings.defaultInstance' and 'EmailService.Properties.Settings.defaultInstance' What happened was that the database file decided to create it's own Setting.Designer.cs; So now I have a Settings.Designer.cs and a Settings1.Designer.cs (which was created by the LINQ to SQL file) in my Properties folder. Is there anyway that I can change where the database file is referencing its settings so I can delete the duplicate?

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• SQL Server CLR Integration to acheive Encryption/Decryption

  - by Aakash

  I have a requirement to store the data in encrypted form in database tables. I want to do it at database level but the problems I am facing: ( a) Data Type of the field should be Varbinary. ( b) Encryption is not supported by Workgroup edition ( c) Is it possible to encrypt Numeric Fields? I want to access the encrypted data in tables to fetch in views and stored procedure for some processing but due to above problems I am not able to. Here is my Environment: Development Platform - ASP.Net,.Net Framework 3.5,Visual studio 2008 Server Operating System - Windows Server 2008 Database - SQL Server 2008 Work group edition I was also thinking to adopt a different approach to resolve this issue (yet to test it's feasibility). I was just wondering if I could create a CLR function (which could take parameters to encrypt and decrypt data using Cryptography types provided in .Net framework) and use the CLR integration feature of SQL Server and call that function from stored procedure and views. I am not sure if I am thinking in right direction? Any advice on this as well please.

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• Infopath - changing sql servers

  - by ScottStonehouse

  I have an InfoPath form which has sort of a master-detail pattern, with two tables in the underlying main datasource. I am trying to migrate this to a new SQL Server - same database, just moved from a SQL2005 machine to a SQL2008 machine. If I change the servername, it also wants me to change the database and tables. If I select the same database and master table, the bindings are maintains for the master table. But there doesn't appear to be a way to select multiple tables when you change the datasource, so you lose the detail bindings. Am I missing something - I'm pretty new to InfoPath.

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• SqlServer2008 - Can I Alter a Scalar Function while it is referenced in many places

  - by Casey C.

  We have a scalar function that returns a DateTime. It performs a couple of quick table selects to get its return value. This function is already in use throughout the database - in default constraints, stored procs, etc. I would like to change the implementation of the function (to remove the table hits and make it more efficient) but apparently I can't do that while it is referenced by other objects in the database. Will I actually need to update every object in the database that references it to remove the reference, update the function and then update all those objects to restore the reference to the function? Thanks for any insight you can give.

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• Hashes vs Numeric id's

  - by Karan Bhangui

  When creating a web application that some how displays the display of a unique identifier for a recurring entity (videos on YouTube, or book section on a site like mine), would it be better to use a uniform length identifier like a hash or the unique key of the item in the database (1, 2, 3, etc). Besides revealing a little, what I think is immaterial, information about the internals of your app, why would using a hash be better than just using the unique id? In short: Which is better to use as a publicly displayed unique identifier - a hash value, or a unique key from the database? Edit: I'm opening up this question again because Dmitriy brought up the good point of not tying down the naming to db specific property. Will this sort of tie down prevent me from optimizing/normalizing the database in the future? The platform uses php/python with ISAM /w MySQL.

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• Strange behaviour of code inside TransactionScope?

  - by Krishna

  We are facing a very complex issue in our production application. We have a WCF method which creates a complex Entity in the database with all its relation. public void InsertEntity(Entity entity) { using(TransactionScope scope = new TransactionScope()) { EntityDao.Create(entity); } } EntityDao.Create(entity) method is very complex and has huge pieces of logic. During the entire process of creation it creates several child entities and also have several queries to database. During the entire WCF request of entity creation usually Connection is maintained in a ThreadStatic variable and reused by the DAOs. Although some of the queries in DAO described in step 2 uses a new connection and closes it after use. Overall we have seen that the above process behaviour is erratic. Some of the queries in the inner DAO does not even return actual data from the database? The same query when run to the actaul data store gives correct result. What can be possible reason of this behaviour?

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• SQL Azure and VS 2010B2 or SSMSE 2008

  - by Vulgrin

  Ok, I see that people have asked this question before, but I'm seeing some conflicting statements. Can I, or can I not, connect directly to my SQL Azure database from SSMSE 2008? I see posts from before November that the SSMS 2008 RC would be able to connect directly - so I don't understand why the newest SSMSE cannot connect. Is it just a problem with the Express version of SSMS? Where can I find the "non-Express" version, if there is one? I can connect to the database via the cancel and connect method - however, you don't get object explorer that way. I see that there are add-ons for VS.Net to allow you to explore the database but I wanted to do it with the base apps if possible. Thanks

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• High PageIOLatch_SH Waits with High Drive Idle times

  - by Marty Trenouth

  We are experiencing high volume of PageIOLatch_SH waits on our database (row counts in the Billions). However it seems that our drive Idle time Percentage hovers around 50-60 percent. CPU usage is nill. The Database Tuning Advisor gives no suggestions for optimization. The query plan (actual) from the single stored procedure used on the database puts the majority of the expense on index seek (yeah I know these should be optimial) operations. Anyone have suggestions of how to increase throughput?

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• Connecting to SQL Server with Visual Studio Express Editions

  - by tlianza

  I find it odd that in Visual C# 2008 Express edition, when you use the database explorer, your options are: 1) Microsoft Access 2) SQL Server Compact 3.5, and 3) SQL Server Database File. BUT if you use Visual Web Developer 2008 Express, you can connect to a regular SQL Server, Oracle, ODBC, etc. For people developing command-line or other C# apps that need to talk to a SQL Server database, do you really need to build your LINQ/Data Access code with one IDE (Visual Web Developer) and your program in another (Visual C#)? It's not a hard workaround, but it seems weird. If Microsoft wanted to force you to upgrade to Visual Studio to connect to SQL Server, why would they include that feature in one of their free IDEs but not the other? I feel like I might be missing something (like how to do it all in Visual C#). Thanks! Tom

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• Managing SQL Server users via Active directory groups

  - by hyty

  I'm building SQL Server instance for reporting purposes. My plan is to use AD groups for server and database logins. I have several groups with different roles (admin, developer, user etc.), and I would like to map these roles into SQL Server database roles (db_owner, db_datawriter etc.). What are the pros and cons of using AD groups for logins? What kind of problems you have noticed?

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• How to resolve this very heavy query that slows down the application?

  - by Juan Paredes

  Hi, We have a web application running in a production enviroment and at some point the client complained about how slow the application got. When we checked what was going on with the application and the database we discover this "precious" query that was being executed by several users at the same time (thus inflicting a extremely high load on the database server): SELECT NULL AS table_cat, o.owner AS table_schem, o.object_name AS table_name, o.object_type AS table_type, NULL AS remarks FROM all_objects o WHERE o.owner LIKE :1 ESCAPE :"SYS_B_0" AND o.object_name LIKE :2 ESCAPE :"SYS_B_1" AND o.object_type IN(:"SYS_B_2", :"SYS_B_3") ORDER BY table_type, table_schem, table_name Our application does not execute this query, I believe it is an Hibernate internal query. I've found little information on why Hibernate does this extremely heavy query, so any help is very much appreciated! The production enviroment information: Red Hat Enterprise Linux 5.3 (Tikanga), JDK 1.5, web container OC4J (whitin Oracle Application Server), Oracle Database 10g Release 10.0.0.1, JDBC Driver for JDK 1.2 and 1.3, Hibernate version 3.2.6.ga. Thank you.

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• "Primary Filegroup is Full" in SQL Server 2008 Standard for no apparent reason

  - by Anton Gogolev

  Our database is currently at 64 Gb and one of our apps started to fail with the following error: System.Data.SqlClient.SqlException: Could not allocate space for object 'cnv.LoggedUnpreparedSpos'.'PK_LoggedUnpreparedSpos' in database 'travelgateway' because the 'PRIMARY' filegroup is full. Create disk space by deleting unneeded files, dropping objects in the filegroup, adding additional files to the filegroup, or setting autogrowth on for existing files in the filegroup. I double-checked everything: all files in a single filegroup are allowed to autogrow with a reasonable increments (100 Mb for a data file, 10% for a log file), more than 100 Gb of free space is available for the database, tempdb is set to autogrow as well with plenty of free HDD space on its drive. To resolve a problem, I added second file to the filegroup and the error has gone. But I feel uneasy about this whole situation. Where' the problem here, guys?

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• Managing MS SQL Server 2005/8 with third-party tools

  - by Craig

  I am trying to access a SQL Server database housed on a ISP. Normally one would simply install an express version of SQL server and use the Management Studio therein. Yeah, not me! Are there any third party tools that will allow me to manage my database? Lightweight ones would be the best but I'm not that picky. :)

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• python, accessing a psycopg2 form a def?

  - by i-Malignus

  i'm trying to make a group of defs in one file so then i just can import them whenever i want to make a script in python i have tried this: def get_dblink( dbstring): """ Return a database cnx. """ global psycopg2 try cnx = psycopg2.connect( dbstring) except Exception, e: print "Unable to connect to DB. Error [%s]" % ( e,) exit( ) but i get this error: global name 'psycopg2' is not defined in my main file script.py i have: import psycopg2, psycopg2.extras from misc_defs import * hostname = '192.168.10.36' database = 'test' username = 'test' password = 'test' dbstring = "host='%s' dbname='%s' user='%s' password='%s'" % ( hostname, database, username, password) cnx = get_dblink( dbstring) can anyone give me a hand?

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• saving information in file in php

  - by Mac Taylor

  hey guys i want to write a tracking system and now i can save in my Mysql database . but saving information about each ip that visits is a huge work for mysql so i think if i could save the information in a file , then there is no discussion about database and its problems . but to begin this : i realy dont know how to save in a file in a way that i can read it with no problem and show the details this is what is used to insert into my database sql_query("insert into tracking (date_time, ip_address, hostname,referer, page , page_title) values ('".sql_quote($dt)."', '".sql_quote($ipaddr)."', '".sql_quote($hostnm)."','$referer', '".sql_quote($pg)."', '".sql_quote($pagetitle)."')", $dbi); i need to show information about all ips in rows , after saving in a file what should i do to save and show in row order ( table ) php/mysql

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• Slow SQLite access on iPhone

  - by georgij

  I have a quite slow data retrieval from a sqlite database on my iPhone and perhaps someone have an alternative idea to explain this. From what I tracked down so far sqlite3_step(statement) is sometimes unusually slow. While retrieving e.g. 50 rows from the database to execute this step takes normally some milliseconds but sometimes it takes several seconds. My database is not small (80MB) and my theory is that the reason is paging. But can someone else think of an other reason for this?

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• How to track changes in many MSSQL databases from .NET application?

  - by Yauheni Sivukha

  Problem: There are a lot of different databases, which is populated by many different applications directly (without any common application layer). Data can be accessed only through SP (by policy) Task: Application needs to track changes in these databases and react in minimal time. Possible solutions: 1) Create trigger for each table in each database, which will populate one table with events. Application will watch this table through SqlDependency. 2) Watch each table in each database through SqlDependency. 3) Create trigger for each table in each database, which will notify application using managed extension. Which is the best way?

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• SQLCe connection error 0x80004005

  - by nihi_l_ist

  Hello. I get the error when i'm trying to open a database in PocketPC emulator or from the program with connection's Open() method(C#)..Here it is: Description: Internal error: SQL Server Compact made an unsupported request to the host operating system. Can someone explain what can cause this error to appear. The database and application are on Storage Card(shared folder from PC, on which Everyone has read/write permissions)Thank you. FOUND that its because of storing DB on Storage Card(after moving database to 'My Documents' error disappears), but still don't know the reason of error.

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• Mysql Real Escape String PHP Function Adding "\" to My Field Entry

  - by Jascha

  Hello, I am submitting a form to my mySql database using PHP. I am sending the form data through the mysql_real_escape_string($content); function. When the entry shows up in my database (checking in myPhpAdmin) all of my double quotes and single quotes are escaped. I'm fairly certain this is a PHP configuration issue? so: $content = 'Hi, my name is Jascha and my "favorite" thing to do is sleep'; mysql_real_escape_string($content); $query = 'INSERT INTO DB...' comes up in my database as: Hi, my name is Jascha and my \"favorite" thing to do is sleep Who do I tell what to do? (I cannot access the php.ini). -J

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• ELMAH with IIS6.0 and SQL Server 2005

  - by RajeshT

  On production I have ELMAH configured so that the errors are logged into a SQL Server 2005 database created specially for ELMAH. The sites run on IIS6.0 web server. ELMAH is able to send emails for the errors, but nothing is getting logged into the SQL Server database. The connection is a trusted connection and I have <section name="errorLog" requirePermission="false" type="Elmah.ErrorLogSectionHandler, Elmah"/> in section group <errorLog type="Elmah.SqlErrorLog, Elmah" connectionStringName="Elmah.Sql" applicationName="VBCPortal"/> under elmah <add name="Elmah.Sql" connectionString="Data Source=(local);Initial Catalog=ELMAH;Trusted_Connection=True" /> in connectionStrings in my web.config file. Any idea why the errors are not getting logged into the database?

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• Login to SQL Server Express via development environment (VS2010)

  - by Sanarothe

  Seems like I'm missing something simple, but my attempts to connect to SQL Server Express have failed. I feel like I need to add privileges for my account but I'm not sure where to do it. Dev Env: VS 2010 (Web) SQL: Sql Server Express 2008 OS: XP Trying to open a connection to database returns: Cannot open database "|DataDirectory|DropData.mdf" requested by the login. The login failed. Login failed for user 'devel.' I created the database using the interface in VS 2010 (Add new item - DB File) but my ASP.Net class only covered design-time access and not access in code, so I'm not familiar with what to do. I created a user (Devel) using SQL Server Management Studio to avoid connecting as SA, but couldn't figure out how to give any SQL-level access rights to this account. Any ideas? Thanks, Cameron

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• How far does Dependency Injection reach?

  - by Baddie

  My web app solution consists of 3 projects: Web App (ASP.NET MVC) Business Logic Layer (Class Library) Database Layer (Entity Framework) I want to use Ninject to manage the lifetime of the DataContext generated by the Entity Framework in the Database Layer. The Business Logic layer consists of classes which reference repositories (located in the database layer) and my ASP.NET MVC app references the business logic layer's service classes to run code. Each repository creates an instance of the MyDataContext object from the Entity Framework Repository public class MyRepository { private MyDataContext db; public MyRepository { this.db = new MyDataContext(); } // methods } Business Logic Classes public class BizLogicClass { private MyRepository repos; public MyRepository { this.repos = new MyRepository(); } // do stuff with the repos } Will Ninject handle the lifetime of MyDataContext despite the lengthy dependency chain from the Web App to the Data Layer?

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• Why does headless PDE Build omit directories I've specified in build.properties's bin.includes?

  - by Woody Zenfell III

  One of my Eclipse plug-ins (OSGi bundles) is supposed to contain a directory (Database Elements) of .sql files. My build.properties shows: bin.includes = META-INF/,\ .,\ Database Elements/ (...which looks right to me.) When I build and run from within my interactive Eclipse IDE, everything works fine: calls to Bundle.getEntry(String) and Bundle.findEntries(String, String, bool) return valid URL objects; my tests are happy; my code is happy. When I build via headless ant script (using PDE Build), those same calls end up returning null. My tests break; my code breaks. I find that Database Elements is quietly but simply missing from my plug-in's JAR package. (META-INF and the built classes still make it in there fine.) I scoured the build log (even eventually invoking ant -verbose on the relevant portion of the build script) but saw no mention of anything helpful. What gives?

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• How can I stop sorl thumbnail from breaking with very long filenames?

  - by bitbutter

  I've noticed that when working with SORL thumbnail, sometimes a user will upload an image with a very long filename, longer than the varfield in the database can hold. The name gets truncated in the database and the project gives errors whenever the image is requested. Is there a smart and safe way to have django automatically truncate long filenames in sorl uploads (prior to saving them in the database) to prevent this sort of thing? As reference, here's how the relevant model from my current project looks: class ArtistImage(models.Model): artist = models.ForeignKey(Artist) position = models.IntegerField() image = ThumbnailField( thumbnail_tag='<span class="artistimagewrapper"><img class="artistimage" src="%(src)s" width="%(width)s" height="%(height)s"></span>', upload_to='uploaded_images/artistimages', size=(900,900), quality=100, options={'crop': 'center'}, extra_thumbnails={ 'small':{ 'size':(92,92), 'quality':100, 'options':{'crop': 'center'}, } } ) class Meta: ordering = ('image',) def __unicode__(self): return (u"%s" % self.image)

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• PostgreSQL server not showing up in phpPgAdmin

  - by morpheous

  I have installed both phpPgAdmin and pgAdmin III on my Ubuntu 9.10 dev box. I created a server using pgAdmin III, and then added a database and populated it. I then navigated to phpPgAdmin, expecting to be able to see the server and be able to log on to the server using the postgres account. However, the only server shown 'PostgreSQL' (and it had a red cross icon). When I attempted to login using the postgres account, the following message was displayed: Login disallowed for security reasons. I have the following questions: Where is the server and database I created (they are still visible when I use pgAdmin III) How may I add another user to the server and give it access to a database?

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