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• Repository Pattern with Entity Framework 3.5

  - by Ravi

  I am developing a Database File System. I am using - .Net framework 3.5 Entity Framework 3.5 WPF with MVVM pattern The project spans across multiple assemblies each using same model. One assembly,let's call it a "server", only adds data to the database using EF i.e. same model.Other assemblies (including the UI) both reads and writes the data.The changes made by server should immediately reflect in other assemblies. The database contains self referencing tables where each entity can have single OR no parent and (may be) some children. I want to use repository pattern which can also provide some mechanism to handle this hierarchical nature. I have already done reading on this on Code Project. It shares the same context(entities) everywhere. My question is - Should I share the same context everywhere? What are the advantages and disadvantages of doing that?

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• Repository Pattern with Entity Framework 3.5

  - by Ravi

  I am developing a Database File System. I am using - .Net framework 3.5 Entity Framework 3.5 WPF with MVVM pattern The project spans across multiple assemblies each using same model. One assembly,let's call it a "server", only adds data to the database using EF i.e. same model.Other assemblies (including the UI) both reads and writes the data.The changes made by server should immediately reflect in other assemblies. The database contains self referencing tables where each entity can have single OR no parent and (may be) some children. I want to use repository pattern which can also provide some mechanism to handle this hierarchical nature. I have already done reading on this on Code Project. It shares the same context(entities) everywhere. My question is - Should I share the same context everywhere? What are the advantages and disadvantages of doing that?

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• Dealing with huge SQL resultset

  - by Dave McClelland

  I am working with a rather large mysql database (several million rows) with a column storing blob images. The application attempts to grab a subset of the images and runs some processing algorithms on them. The problem I'm running into is that, due to the rather large dataset that I have, the dataset that my query is returning is too large to store in memory. For the time being, I have changed the query to not return the images. While iterating over the resultset, I run another select which grabs the individual image that relates to the current record. This works, but the tens of thousands of extra queries have resulted in a performance decrease that is unacceptable. My next idea is to limit the original query to 10,000 results or so, and then keep querying over spans of 10,000 rows. This seems like the middle of the road compromise between the two approaches. I feel that there is probably a better solution that I am not aware of. Is there another way to only have portions of a gigantic resultset in memory at a time? Cheers, Dave McClelland

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• Microsoft CRM Dynamics Install

  - by Pino

  Trying to install CRM4.0 on Windows Small Business Server. We get through the isntall process (Setting up database, website, AD etc) when we clikc install though the following error is dumped to the log file, anyone point us in the right directon? 13:49:07| Info| Win32Exception: 1635 13:49:07| Error| Failed to revoke temporary database access.System.Data.SqlClient.SqlException: Cannot open database "MSCRM_CONFIG" requested by the login. The login failed. Login failed for user 'SCHIP\administrator'. at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup) at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.SqlClient.SqlConnection.Open() at Microsoft.Crm.CrmDbConnection.Open() at Microsoft.Crm.Setup.Database.SharedDatabaseUtility.DeleteDBUser(String sqlServerName, String databaseName, String user, CrmDBConnectionType connectionType) at Microsoft.Crm.Setup.Server.RevokeConfigDBDatabaseAccessAction.Do(IDictionary parameters) 13:49:07| Error| HResult=80004005 Install exception.System.Exception: Action Microsoft.Crm.Setup.Server.MsiInstallServerAction failed. --- System.ComponentModel.Win32Exception: This update package could not be opened. Verify that the update package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer update package at Microsoft.Crm.Setup.Common.Utility.MsiUtility.InstallProduct(String packagePath, String commandLine) at Microsoft.Crm.Setup.Server.MsiInstallServerAction.Do(IDictionary parameters) at Microsoft.Crm.Setup.Common.Action.ExecuteAction(Action action, IDictionary parameters, Boolean undo) --- End of inner exception stack trace --- at Microsoft.Crm.Setup.Common.Action.ExecuteAction(Action action, IDictionary parameters, Boolean undo) at Microsoft.Crm.Setup.Common.Installer.Install(IDictionary stateSaver) at Microsoft.Crm.Setup.Common.ComposedInstaller.InternalInstall(IDictionary stateSaver) at Microsoft.Crm.Setup.Common.ComposedInstaller.Install(IDictionary stateSaver) at Microsoft.Crm.Setup.Server.ServerSetup.Install(IDictionary data) at Microsoft.Crm.Setup.Server.ServerSetup.Run() 13:49:07| Info| Microsoft Dynamics CRM Server install Failed. 13:49:07| Info| Microsoft Dynamics CRM Server Setup did not complete successfully. Action Microsoft.Crm.Setup.Server.MsiInstallServerAction failed. This update package could not be opened. Verify that the update package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer update package

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• What is the best way of doing this?

  - by NewSOuser

  Hey, I am wondering how exactly the below pagination systems are set up? In terms of the how the data is displayed, for instance, does BuySellAds load all results in from database and then paginate that data so filter can be done easier? or, do they call the database every time a new page is loaded and then grab the info and display it? I really would like to know how both BuySellAds and Nike make their pagination systems, since I have to make a similar system that has many filters and options to easily sort through the data from a database. I want to accomplish this with php and jquery if that's what I even need to use. Here is what I am talking about so you can experience it for yourself: BuySellAds store.nike.com Any info/suggestions would be great. Thanks for your input.

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• Problem retrieving Strings from varbinary columns using HIbernate and MySQL

  - by user303396

  Hello, Here's my scenario. I save a bunch of Strings containing asian characters in MySQL using Hibernate. These strings are written in varbinary columns. Everything works fine during the saving operation. The DB contains the correct values (sequence of bytes). If I query (again using Hibernate) for the Strings that I saved I get the correct results. But when Hibernate fills the entity to which the Strings belong with the values from the DB I get different values then the ones I used in the query that retrieved them. Instead of receiving the correct values I receive a bunch of FFFD replacement characters. For example: if I store "??" in the DB and then I query for it, the resulting String will be \uFFFD\uFFFD\uFFFD\uFFFD\uFFFD\uFFFD. the DB connection has the following parameters set useUnicode=true&characterEncoding=UTF-8, I've tried using the true UTF-8 configurations for Hibernate but that didn't solve the problem What am I missing? Any suggestions? Thanks

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• Entity Framework - SaveChanges with GUID as EntityKey

  - by MissingLinq

  I have a SQL Server 2008 database table that uses uniqueidentifier as a primary key. On inserts, the key is generated on the database side using the newid() function. This works fine with ADO.NET. But when I set up this table as an entity in an Entity Framework 4 model, there's a problem. I am able to query the entity just fine, but when creating a new entity and invoking SaveChanges() on the context, the generated uniqueidentifier on the database is all zeros. I understand there was an issue with EF v1 where this scenario did not work, requiring creating the GUID on the client prior to calling SaveChanges. However, I had read in many places that they were planning to fix this in EF 4. My question -- is this scenario (DB-side generation of uniqueidentifier) still not supported in EF4? Are we still stuck with generating the GUID on the client?

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• Entity Framework, Foreign Keys and EntityKeys

  - by Greg

  I've got a problem with the Entity Framework and the ForeignKeys. I've got a table "BC_Message_Assets" which has 3 FK's (MessageId, AssetId and StatusId). I create my "MessageAsset" like this MessageAsset messageAsset = new MessageAsset(); messageAsset.MessageStatusReference.EntityKey = new EntityKey("MyEntities.MessageStatusSet", "Id", 1); messageAsset.AssetReference.EntityKey = new EntityKey("MyEntities.AssetSet", "Id", 1); messageAsset.MessageReference.EntityKey = new EntityKey("MyEntities.MessageSet", "Id", messageId); context.AddToMessageAssetSet(messageAsset); context.SaveChanges(); But I got the following exception : The INSERT statement conflicted with the FOREIGN KEY constraint \"FK_BC_Message_Assets_BC_Assets\". The conflict occurred in database \"Test\", table \"dbo.BC_Assets\", column 'Id'.\r\nThe statement has been terminated. When I look at the query, I notice that the parameter value for AssetId is "0" despite that I provided "1" to the EntityKey. Here's the generated query : exec sp_executesql N'insert [dbo].[BC_Message_Assets]([MessageId], [AssetId], [CompletionTime], [StatusId]) values (@0, @1, null, @2) ',N'@0 int,@1 int,@2 int',@0=47,@1=0,@2=1 I can't explain what happens. I hardcoded "1" in the EntityKey and I received "0" in the query ?

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• SQL Server 2008 Recovery Mode reverts from FULL to SIMPLE

  - by Eric Hazen

  Three of our SQL databases have their recovery model change every night from FULL to SIMPLE. The only jobs that I'm aware of are two BackupExec jobs that run nightly. Why would the recovery model change? Backup Jobs: SQL FULL BACKUP, SQL LOG BACKUP Event Manager: Event 5084: Setting Database option RECOVERY to SIMPLE for database databaseName

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• Lucene.NET 2.9 and BitArray/DocIdSet

  - by Paul Knopf

  I found a great example on grabbing facet counts on a base query. It stores the bitarray of the base query to improve the performance each time the a facet gets counted. var genreQuery = new TermQuery(new Term("genre", genre)); var genreQueryFilter = new QueryFilter(genreQuery); BitArray genreBitArray = genreQueryFilter.Bits(searcher.GetIndexReader()); Console.WriteLine("There are " + GetCardinality(genreBitArray) + " document with the genre " + genre); // Next perform a regular search and get its BitArray result Query searchQuery = MultiFieldQueryParser.Parse(term, new[] {"title", "description"}, new[] {BooleanClause.Occur.SHOULD, BooleanClause.Occur.SHOULD}, new StandardAnalyzer()); var searchQueryFilter = new QueryFilter(searchQuery); BitArray searchBitArray = searchQueryFilter.Bits(searcher.GetIndexReader()); Console.WriteLine("There are " + GetCardinality(searchBitArray) + " document containing the term " + term); The only problem is that I am using a newer version of Lucene.NET (2.9) and Filter.Bits is obsolete. We are told to use DocIdSet instead (rather than BitArray). I cannot found out how to do the bitArray.And(bitArray) with a docIdSet. I looked in reflector and found OpenIdSet which has And operations. Not sure if OpenIdSet is the route to go, I'm just stating. Thanks in advance!

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• Iterating arrays in a batch file

  - by dboarman-FissureStudios

  I am writing a batch file (I asked a question on SU) to iterate over terminal servers searching for a specific user. So, I got the basic start of what I'm trying to do. Enter a user name Iterate terminal servers Display servers where user is found (they can be found on multiple servers now and again depending on how the connection is lost) Display a menu of options Iterating terminal servers I have: for /f "tokens=1" %%Q in ('query termserver') do (set __TermServers.%%Q) Now, I am getting the error... Environment variable __TermServers.SERVER1 not defined ...for each of the terminal servers. This is really the only thing in my batch file at this point. Any idea on why this error is occurring? Obviously, the variable is not defined, but I understood the SET command to do just that. I'm also thinking that in order to continue working on the iteration (each terminal server), I will need to do something like: :Search for /f "tokens=1" %%Q in ('query termserver') do (call Process) goto Break :Process for /f "tokens=1" %%U in ('query user %%username%% /server:%%Q') do (set __UserConnection = %%C) goto Search However, there are 2 things that bug me about this: Is the %%Q value still alive when calling Process? When I goto Search, will the for-loop be starting over? I'm doing this with the tools I have at my disposal, so as much as I'd like to hear about PowerShell and other ways to do this, it would be futile. I have notepad and that's it. Note: I would continue this line of questions on SuperUser, except that it seems to be getting more into programming specifics.

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• Can I override task :environment in test_helper.rb to test rake tasks?

  - by Michael Barton

  I have a series of rake tasks in a Rakefile which I'd like to test as part of my specs etc. Each task is defined in the form: task :do_somthing => :environment do # Do something with the database here end Where the :environment task sets up an ActiveRecord/DataMapper database connection and classes. I'm not using this as part of Rails but I have a series of tests which I like to run as part of BDD. This snippet illustrates how I'm trying to test the rake tasks. def setup @rake = Rake::Application.new Rake.application = @rake load File.dirname(__FILE__) + '/../../tasks/do_something.rake' end should "import data" do @rake["do_something"].invoke assert something_in_the_database end So my request for help - is it possible to over-ride the :environment task in my test_helper.rb file so I my rake testing interacts with the my test database, rather than production? I've tried redefining the task in the helper file, but this doesn't work. Any help for a solution would be great, as I've been stuck on this for the past week.

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• Comparing form fields with data base fields and highlighting the form fields

  - by naveen kotla

  Hi, Can you help me in the following two scenarios (PHP+MYSQL) Scenario1: I need to compare the HTML Form field values with the Database field values and highlight the form fields in some color whose values are different from database values before submitting the form (to alert the user). Scenario2: On loading the form, i need to compare the values present in 2 different database tables (tables are having different column names but the information is same). the fields which are not same needs to be highlighted in the html form to indicate the users that the master data is varying from secondary data. Could you help me which is the efficient way of doing this (comparison and highlighting the form values). thanks in advance Naveen

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• Add a :filter param to the end of a url

  - by bob

  Hello, I am building an application that requires a search to go deeper than the initial level. I am using nested scopes to accomplish this and params in the URL For example, when a user searches for "handbag" it creates a query like the following. http://localhost:3000/junks?search=handbag&condition=&category=&main_submit=Go! I want to add a :filter param to the end of this url and reload the page with the new url. http://localhost:3000/junks?search=handbag&condition=&category=&main_submit=Go!&filter=lowest_price As shown above the &filter=lowest_price is added to the query. I have already written controller code to handle this and I know it works as long as the query is like the 2nd link above. my views code <div class = "filter_options"> <p> <strong>Filter by:</strong> <%= link_to_unless_current "Recent", :filter => 'recent' %> | <%= link_to_unless_current "Lowest Price", :filter => 'lowest_price' %> | <%= link_to_unless_current "Highest Price", :filter => 'highest_price' %> </p> </div> This is how I have it currently, which works if my URL does not have a search string attached to it. Unfortunately, this will go to a http://localhost:3000/junks?filter=lowest_price even if there is a search string. I would like to know how to create my links so that they add onto the search string shown in the 2nd code example. Additionally, if a search string with a filter is already present, it would only change that filter and resubmit the search string with the new filter. I hope I am being clear.

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• Mysql server crashes Innodb

  - by martin

  Today we got some DB crash. The DB is InnoDB. At firstin log: 120404 10:57:40 InnoDB: ERROR: the age of the last checkpoint is 9433732, InnoDB: which exceeds the log group capacity 9433498. InnoDB: If you are using big BLOB or TEXT rows, you must set the InnoDB: combined size of log files at least 10 times bigger than the InnoDB: largest such row. 120404 10:58:48 InnoDB: ERROR: the age of the last checkpoint is 9825579, InnoDB: which exceeds the log group capacity 9433498. InnoDB: If you are using big BLOB or TEXT rows, you must set the InnoDB: combined size of log files at least 10 times bigger than the InnoDB: largest such row. 120404 10:59:04 InnoDB: ERROR: the age of the last checkpoint is 13992586, InnoDB: which exceeds the log group capacity 9433498. InnoDB: If you are using big BLOB or TEXT rows, you must set the InnoDB: combined size of log files at least 10 times bigger than the InnoDB: largest such row. 120404 10:59:20 InnoDB: ERROR: the age of the last checkpoint is 18059881, InnoDB: which exceeds the log group capacity 9433498. InnoDB: If you are using big BLOB or TEXT rows, you must set the InnoDB: combined size of log files at least 10 times bigger than the InnoDB: largest such row. after manual service stop and normal PC restart : 120404 11:12:35 InnoDB: Error: page 3473451 log sequence number 105 802365904 InnoDB: is in the future! Current system log sequence number 105 796344770. InnoDB: Your database may be corrupt or you may have copied the InnoDB InnoDB: tablespace but not the InnoDB log files. See InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html InnoDB: for more information. InnoDB: 1 transaction(s) which must be rolled back or cleaned up InnoDB: in total 1 row operations to undo InnoDB: Trx id counter is 0 1103869440 120404 11:12:37 InnoDB: Error: page 0 log sequence number 105 834817616 InnoDB: is in the future! Current system log sequence number 105 796344770. InnoDB: Your database may be corrupt or you may have copied the InnoDB InnoDB: tablespace but not the InnoDB log files. See InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html InnoDB: for more information. InnoDB: Last MySQL binlog file position 0 3710603, file name .\mysql-bin.000336 InnoDB: Starting in background the rollback of uncommitted transactions 120404 11:12:38 InnoDB: Rolling back trx with id 0 1103866646, 1 rows to undo 120404 11:12:38 InnoDB: Started; log sequence number 105 796344770 120404 11:12:38 InnoDB: Error: page 2097163 log sequence number 105 803249754 InnoDB: is in the future! Current system log sequence number 105 796344770. InnoDB: Your database may be corrupt or you may have copied the InnoDB InnoDB: tablespace but not the InnoDB log files. See InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html InnoDB: for more information. InnoDB: Rolling back of trx id 0 1103866646 completed 120404 11:12:39 InnoDB: Rollback of non-prepared transactions completed 120404 11:12:39 [Note] Event Scheduler: Loaded 0 events 120404 11:12:39 [Note] wampmysqld: ready for connections. Version: '5.1.53-community' socket: '' port: 3306 MySQL Community Server (GPL) 120404 11:12:40 InnoDB: Error: page 2097162 log sequence number 105 803215859 InnoDB: is in the future! Current system log sequence number 105 796345097. InnoDB: Your database may be corrupt or you may have copied the InnoDB InnoDB: tablespace but not the InnoDB log files. See InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html InnoDB: for more information. 120404 11:12:40 InnoDB: Error: page 2097156 log sequence number 105 803181181 InnoDB: is in the future! Current system log sequence number 105 796345097. InnoDB: Your database may be corrupt or you may have copied the InnoDB InnoDB: tablespace but not the InnoDB log files. See InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html InnoDB: for more information. 120404 11:12:40 InnoDB: Error: page 2097157 log sequence number 105 803193066 InnoDB: is in the future! Current system log sequence number 105 796345097. InnoDB: Your database may be corrupt or you may have copied the InnoDB InnoDB: tablespace but not the InnoDB log files. See InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html InnoDB: for more information. when tried to recover data get : key_buffer_size=16777216 read_buffer_size=262144 max_used_connections=0 max_threads=151 threads_connected=0 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 133725 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd: 0x0 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... 0000000140262AFC mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 00000001402AAFA1 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 00000001402AB33A mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 0000000140268219 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 000000014027DB13 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 00000001402A909F mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 00000001402A91B6 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 000000014025B9B0 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 000000014022F9C6 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 0000000140219979 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 000000014009ABCF mysqld.exe!?ha_initialize_handlerton@@YAHPEAUst_plugin_int@@@Z() 000000014003308C mysqld.exe!?plugin_lock_by_name@@YAPEAUst_plugin_int@@PEAVTHD@@PEBUst_mysql_lex_string@@H@Z() 00000001400375A9 mysqld.exe!?plugin_init@@YAHPEAHPEAPEADH@Z() 000000014001DACE mysqld.exe!handle_shutdown() 000000014001E285 mysqld.exe!?win_main@@YAHHPEAPEAD@Z() 000000014001E632 mysqld.exe!?mysql_service@@YAHPEAX@Z() 00000001402EA477 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 00000001402EA545 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 000000007712652D kernel32.dll!BaseThreadInitThunk() 000000007725C521 ntdll.dll!RtlUserThreadStart() The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains information that should help you find out what is causing the crash. 120404 14:17:49 [Note] Plugin 'FEDERATED' is disabled. 120404 14:17:49 [Warning] option 'innodb-force-recovery': signed value 8 adjusted to 6 InnoDB: The user has set SRV_FORCE_NO_LOG_REDO on InnoDB: Skipping log redo InnoDB: Error: trying to access page number 4290979199 in space 0, InnoDB: space name .\ibdata1, InnoDB: which is outside the tablespace bounds. InnoDB: Byte offset 0, len 16384, i/o type 10. InnoDB: If you get this error at mysqld startup, please check that InnoDB: your my.cnf matches the ibdata files that you have in the InnoDB: MySQL server. 120404 14:17:52 InnoDB: Assertion failure in thread 3928 in file .\fil\fil0fil.c lin23 InnoDB: We intentionally generate a memory trap. InnoDB: Submit a detailed bug report to http://bugs.mysql.com. InnoDB: If you get repeated assertion failures or crashes, even InnoDB: immediately after the mysqld startup, there may be InnoDB: corruption in the InnoDB tablespace. Please refer to InnoDB: http://dev.mysql.com/doc/refman/5.1/en/forcing-recovery.html InnoDB: about forcing recovery. 120404 14:17:52 - mysqld got exception 0xc0000005 ; This could be because you hit a bug. It is also possible that this binary or one of the libraries it was linked against is corrupt, improperly built, or misconfigured. This error can also be caused by malfunctioning hardware. We will try our best to scrape up some info that will hopefully help diagnose the problem, but since we have already crashed, something is definitely wrong and this may fail. key_buffer_size=16777216 read_buffer_size=262144 max_used_connections=0 max_threads=151 threads_connected=0 It is possible that mysqld could use up to key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 133725 K bytes of memory Hope that's ok; if not, decrease some variables in the equation. thd: 0x0 Attempting backtrace. You can use the following information to find out where mysqld died. If you see no messages after this, something went terribly wrong... 0000000140262AFC mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 00000001402AAFA1 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 00000001402AB33A mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 0000000140268219 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 000000014027DB13 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 00000001402A909F mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 00000001402A91B6 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 000000014025B9B0 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 000000014022F9C6 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 0000000140219979 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 000000014009ABCF mysqld.exe!?ha_initialize_handlerton@@YAHPEAUst_plugin_int@@@Z() 000000014003308C mysqld.exe!?plugin_lock_by_name@@YAPEAUst_plugin_int@@PEAVTHD@@PEBUst_mysql_lex_string@@H@Z() 00000001400375A9 mysqld.exe!?plugin_init@@YAHPEAHPEAPEADH@Z() 000000014001DACE mysqld.exe!handle_shutdown() 000000014001E285 mysqld.exe!?win_main@@YAHHPEAPEAD@Z() 000000014001E632 mysqld.exe!?mysql_service@@YAHPEAX@Z() 00000001402EA477 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 00000001402EA545 mysqld.exe!?check_next_symbol@Gis_read_stream@@QEAA_ND@Z() 000000007712652D kernel32.dll!BaseThreadInitThunk() 000000007725C521 ntdll.dll!RtlUserThreadStart() The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains information that should help you find out what is causing the crash. Any suggestion how to get DB working ????

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• Laravel - Paginate and get()

  - by Bajongskie

  With the code below, what I wanted was paginate the query I created. But, when I try to add paginate after get, it throws an error. I wanted to remain get since I want to limit to columns that was set on $fields. What would should be the better idea to paginate this thing? or what's a good substitute for get and limit the columns? What I tried: ->get($this->fields)->paginate($this->limit) Part of my controller: class PhonesController extends BaseController { protected $limit = 5; protected $fields = array('Phones.*','manufacturers.name as manufacturer'); /** * Display a listing of the resource. * * @return Response */ public function index() { if (Request::query("str")) { $phones = Phone::where("model", 'LIKE', '%'. Request::query('str') . '%') ->join('manufacturers', 'manufacturers_id', '=', 'manufacturers.id') ->get($this->fields); } else { $phones = Phone::join('manufacturers', 'manufacturers_id', '=', 'manufacturers.id') ->get($this->fields); } return View::make('phones.index')->with('phones', $phones); } }

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• Wpf Login System

  - by neki

  Hi everyone. i am developing a training software in wpf. but i have problems. this application will be setup project. when the user make it work, a login window will open. User should enter his username.there wont be a password. but the problem is next; i dont know how to get userid from database. and compare other usernames to get the right userid. second problem is, when i get right userid from database, how can i use it main window? where can i store this userid. will be this session or something like that? i want this userid because, user will have notpad and questions. thanks in advance. Database(UserInformation table) userid/ username

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• Convert byte array from Oracle RAW to System.Guid?

  - by Cory McCarty

  My app interacts with both Oracle and SQL Server databases using a custom data access layer written in ADO.NET using DataReaders. Right now I'm having a problem with the conversion between GUIDs (which we use for primary keys) and the Oracle RAW datatype. Inserts into oracle are fine (I just use the ToByteArray() method on System.Guid). The problem is converting back to System.Guid when I load records from the database. Currently, I'm using the byte array I get from ADO.NET to pass into the constructor for System.Guid. This appears to be working, but the Guids that appear in the database do not correspond to the Guids I'm generating in this manner. I can't change the database schema or the query (since it's reused for SQL Server). I need code to convert the byte array from Oracle into the correct Guid.

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• SqlCommand - preventing stored proc call in other databases

  - by Moe Sisko

  When using SqlCommand to call a stored proc via RPC, it looks like it is possible to call a stored proc in a database other than the current database. e.g. : string storedProcName = "SomeOtherDatabase.dbo.SomeStoredProc"; SqlCommand cmd = new SqlCommand(storedProcName); cmd.CommandType = CommandType.StoredProcedure; I'd like to make my DAL code more restrictive, by disallowing potential calls to another database. One way might be to check if there are two periods (dots) in storedProcName above, and if so, throw an exception. Any other ideas/approaches ? Thanks.

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• MySQL and PostgreSQL on the same hardware

  - by Kamil Kisiel

  We recently bought some new hardware for a database server which we were intending to dedicate to the operation of PostgreSQL. However now we have the requirement to also run MySQL as some software we want to use only supports that database. Since the storage on this machine is the most suitable for hosting a DB, and we don't currently have the budget for more hardware,we're thinking of running both of them on the same server. Are there any caveats or best practices we should be aware of?

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• HTTPHeaders Added to Downloaded File - CocoaHTTPServer???

  - by Don

  In an iPhone app where I use cocoahttpserver and take a sqlite database file from the iPhone and download it with a browser to my PC, when I look at the downloaded file using TextEdit, I see the text (below) at the end of the file. This text has apparently no effect on use of the database file, but I would prefer to not add stuff to the database file at all. Any ideas where this header info is coming from in cocoahttpserver and how to stop it? Thanks. ------WebKitFormBoundary3RAcT2SVGhGPnoA6 Content-Disposition: form-data; name="submit.x" 26 ------WebKitFormBoundary3RAcT2SVGhGPnoA6 Content-Disposition: form-data; name="submit.y" 12 ------WebKitFormBoundary001Quvx6Efgaf23y Content-Disposition: form-data; name="submit.x" 30 ------WebKitFormBoundary001Quvx6Efgaf23y Content-Disposition: form-data; name="submit.y" 12 ------WebKitFormBoundaryfHyUUs1p31kBJ3gA Content-Disposition: form-data; name="submit.x" 52 ------WebKitFormBoundaryfHyUUs1p31kBJ3gA Content-Disposition: form-data; name="submit.y" 9

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• Hibernate list operation question

  - by Sumit Kishore

  I'm working on a utility to update a list of entities in a database as a group. The database contains a list of entities. The result of the update is a new list. The API accepts this new list. The update may end up modifying some of the entities in the list, creating new ones and deleting some. So at the entity level, I may have to do any of an insert, delete or update operation. But it's always true that the final list in the database will be the same as the list passed down to the API. Is there in Hibernate a way to treat this operation at the list level, that is, tell Hibernate to persist this list of entities, and let it take care of which need to be created, updated or deleted? There is no entity/table representing this list, btw. Just the entities themselves in a table.

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• Best City in Australia for Dedicated Hosting [closed]

  - by Brian Stinson

  We are looking to duplicate a copy of our database and application servers to serve our customers in Australia. We are looking for a well connected datacenter providing dedicated hosting (full machine rental) to take database updates and the like from our main site in Boston, MA. Which general location/city in Australia is best connected? East Coast? West Coast? If you have individual datacenter recommendations those are helpful as well.

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• Crawler do not create custom crawled properties

  - by user173739

  These days i have faced with very strange problem. I have development environment with MOSS 2007 SP 2 and WS 2008, i have search configured and everything works great. I have started to configuring staging environment (MOSS 2007 SP2 with June CU) and create new farm and new SSP. I have deployed my changes with package (wsp) and manually create site collections, sub webs, pages and so on. When fill crawl finishes, i see in Crawl log that all my pages have been successfully crawled and when i use some test tools to query search, my pages have been found. In crawl log there is few errors like http://mysite/sites/de/pages "The crawler could not communicate with the server. Check that the server is available and that the firewall access is configured correctly..", but all pages in this Page library were indexed. The problem is that i use custom managed properties (mapped to custom crawled properties) in search queries, but crawler didn't create crawled properties for all my new site columns. For example for site column IsAccent the crawler didn't create cralwed property ows_isAccesnt. I'm sure that i have created pages for specific content type and all my crawl categories have checked "Automatically discover new properties when a crawl takes place ". In site settings - Searchable columns i haven't got any column selected as Nocrowl. I tried to export my managed and crawled properties from dev environment to stage evironment but all my managed properties were empty, after that i recreated SSP...the result was the same... I checked specific page with tools like Sharepoint Manager 2007 and U2U Caml Query Builder 2007 that content type is correct, and i can see values of my custom site collumns.... Using U2U Caml Query Builder 2007 agains some Page library in Result tab i can see ows_IsAccent (my site collumn is IsAccent) and others site columns, but i can't find them in Crawled properties. Any idias?

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• TransactionScope and Connection Pooling

  - by Graham

  Hi, I'm trying to get a handle on whether we have a problem in our application with database connections using incorrect IsolationLevels. Our application is a .Net 3.5 database app using SQL Server 2005. I've discovered that the IsolationLevel of connections are not reset when they are returned to the connection pool (see here) and was also really surprised to read in this blog post that each new TransactionScope created gets its own connection pool assigned to it. Our database updates (via our business objects) take place within a TransactionScope (a new one is created for each business object graph update). But our fetches do not use an explicit transaction. So what I'm wondering is could we ever get into the situation where our fetch operations (which should be using the default IsolationLevel - Read Committed) would reuse a connection from the pool which has been used for an update, and inherit the update IsolationLevel (RepeatableRead)? Or would our updates be guaranteed to use a different connection pool seeing as they are wrapped in a TransactionScope? Thanks in advance, Graham

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