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• How to set utf8 in the auto-generated PHP code of flash builder 4 ?

  - by Mark

  HI, PHP problem here (I think): I've just created a Flex (Flash Builder) project with a datagrid linked to a database - the database is all utf8. When I run the project using the auto-generated code in flex4, the non-English part comes like ????? while the English part comes fine. The auto-generated PHP code uses mysqli. I've tried: $this->connection->set_charset('utf8'); or mysqli_query($this->connection,"SET NAMES utf8"); I also tried writing the code myself (I'm not a PHP guy): mysql_query("set names utf8"); was fine - but that's mysql and not mysqli (that's an "i" after the mysql) and I want to use the auto-generated code... any help is appreciated.

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• Php getting too many connections error from MySQL

  - by uzioriluzan

  Hello everyone, I am using MySQL and PHP with 2 application servers and 1 database server. With the increase of the number of users (around 1000 by now), I'm getting the following error : SQLSTATE[08004] [1040] Too many connections The parameter "max_connections" is set to "1000" in my.cnf and "mysql.max_persistent" is set to -1 in php.ini. There are at most 1500 apache processes running at a time since the "MaxClients" apache parameter is equal to 750 and we have 2 application servers. Should I raise the "max_connections" to 1500 as indicated in here? Or should I set "mysql.max_persistent" to 750 (we use PDO with persistent connections for performance reasons since the database server is not the same as the application servers)? Or should I try something else? Thanks in advance!

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• Double Inner Join generates unexpected error

  - by Itamar Marom

  In my database I have three tables: Users: UserID (Auto Numbering), UserName, UserPassword and a few other unimportant fields. PrivateMessages: MessageID (Auto Numbering), SenderID and a few other fields defining the message content. MessageStatus: MessageID, ReceiverID, MessageWasRead (Boolean) What I need is a query to which I input a user's id and I get all the private messages he has received. In addition, I also need to receive each message's sender UserName. For this I wrote the following query: SELECT Users.*, PrivateMessages.*, MessageStatus.* FROM PrivateMessages INNER JOIN Users ON PrivateMessages.SenderID = Users.UserID INNER JOIN MessageStatus ON PrivateMessages.MessageID = MessageStatus.MessageID WHERE MessageStatus.ReceiverID=[@userid]; But for some reason when I try saving it in my Access database, I get the following error (translated to English by me, since my office is in a different language): Syntax error (missing operator) at expression: "PrivateMessages.SenderID = Users.UserID INNER JOIN MessageStatus ON PrivateMessages.MessageID = MessageStatus.MessageI". Any ideas what could cause this? Thanks.

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• Can I improve performance by refactoring SQL commands into C# classes?

  - by Matthew Jones

  Currently, my entire website does updating from SQL parameterized queries. It works, we've had no problems with it, but it can occasionally be very slow. I was wondering if it makes sense to refactor some of these SQL commands into classes so that we would not have to hit the database so often. I understand hitting the database is generally the slowest part of any web application For example, say we have a class structure like this: Project (comprised of) Tasks (comprised of) Assignments Where Project, Task, and Assignment are classes. At certain points in the site you are only working on one project at a time, and so creating a Project class and passing it among pages (using Session, Profile, something else) might make sense. I imagine this class would have a Save() method to save value changes. Does it make sense to invest the time into doing this? Under what conditions might it be worth it?

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• Design ideas for a versioned db schema with related tables also versioned

  - by vfilby

  Here is the drill, I want to version a database. I have done this before using multiple rows where the table primary key becomes a combination of the row id and either a datestamp or a version #. Now I want to version a table that depends on many other small tables. Versioning each table will be a giant PITA, so I am looking for good options to verion a schema where the data to be versioned spreads over multiple tables. All related tables are properly keyed with foreign key relationships. The database is currently on Sql Server 2005.

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• Can I Use ASP.NET Wizard Control to Insert Data into Multiple Tables?

  - by SidC

  Hello All, I have an ASP.NET 3.5 webforms project written in VB that involves a multi-table SQL Server insert. That is, I want the customer to input all their contact information, order details etc. into one control (thinking wizard control). Then, I want to call a stored procedure that does the insert into the respective database tables. I'm familiar and comfortable with the ASP.NET wizard control. However, all the examples I've seen in my searches pertain to inserting data into one table. Questions: 1. Given a typical order process - customer information, order information, order details - should a wizard control be used to insert data into multiple database tables? If not, what controls/workflow do you suggest? 2. I've set primary keys and indexes on my order details, orders and customers tables. Is there special stored procedure syntax to use to ensure that referential integrity is maintained through the insert process? Thanks, Sid

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• Human readable URL causes a problem in Ruby on Rails

  - by TK

  I have a basic CRUD with "Company" model. To make the company name show up, I did def to_param name.parameterize end Then I accessed http://localhost:3000/companies/american-express which runs show action in the companies controller. Obviously this doesn't work because the show method is as following: def show @company = Company.find_by_id(params[:id]) end The params[:id] is american-express. This string is not stored anywhere. Do I need to store the short string (i.e., "american-express") in the database when I save the record? Or is there any way to retrieve the company data without saving the string in the database?

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• Entity Framework 4 - Delete Object

  - by GibboK

  I have 3 Tables in my DataBase CmsMasterPages CmsMasterPagesAdvSlots (Pure Juction Table) CmsAdvSlots Here a Picture of my EDM: I need find out all objects CmsAdvSlot connected with a CmsMasterPage (it is working in my code posted belove), and DELETE the result (CmsAdvSlot) from the DataBase. My Problem is I am not able to DELETE this Objects when I found theme. Error: The object cannot be deleted because it was not found in the ObjectStateManager. int findMasterPageId = Convert.ToInt32(uxMasterPagesListSelector.SelectedValue); CmsMasterPage myMasterPage = context.CmsMasterPages.FirstOrDefault(x => x.MasterPageId == findMasterPageId); var resultAdvSlots = myMasterPage.CmsAdvSlots; // It is working until here foreach (var toDeleteAdv in resultAdvSlots) { context.DeleteObject(myMasterPage.CmsAdvSlots.Any()); // ERORR HERE!! context.SaveChanges(); } Any idea how to solve it? Thanks for your time! :-)

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• Security when writing a PHP webservice?

  - by chustar

  I am writing a web service in PHP for the first time and had ran into some security problems. 1) I am planning to hash passwords using md5() before I write them to the database (or to authenticate the user) but I realize that to do that, I would have to transmit the password in plaintext to the server and hash it there. Because of this I thought of md5()ing it with javascript client side and then rehashing on the server but then if javascript is disabled, then the user can't login, right? 2) I have heard that anything that when the action is readonly, you should use GET but if it modifies the database, you should use POST. Isn't post just as transparent as GET, just not in the address bar?

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• PgJDBC: "no suitable driver found" when following tutorial, why?

  - by Celeritas

  I'm writing a Java program that queries a PostgreSQL database. I'm following this example and have trouble here: connection = DriverManager.getConnection( "jdbc:postgresql://127.0.0.1:5432/testdb", "mkyong", "123456"); According to the JavaDoc for DriverManager the first string is "a database url of the form jdbc:subprotocol:subname. When I connect to the server I type in psql -h dataserv.abc.company.com -d app -U emp24 and give the password qwe123 (for example sake). What should the first argument of getConnection be? I've tried connection = DriverManager.getConnection( "jdbc:postgresql://dataserv.abc.company.com", "emp24", "qwe123"); and get the run time error: no suitable driver found. I've download JDBC4 Postgresql Driver, Version 9.2-1000.

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• How do I submit really big amounts of data to a form?

  - by William Calleja

  I have an HTML from that's posting a really big amount of data which is eventually being saved into an SQL Server 2005, the form is as follows: <form name="frmForm" method="post" action="saveData.aspx"> the target page takes the content of a control within the form and saves it to the database through a normal SQL insert statement. However only a portion of the data is being saved. The field in the database is an ntext. Should I use a different field? Or is something happening while I'm transferring from one page to another? Or even still there's something happening when I'm sending the really big SQL statement through c# in saveData.aspx?

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• NTbackup doesn't complete on system state

  - by Joe Majsterski

  I have a Windows 2003 server that is running a semi-custom backup task. The scheduled task calls NTbackup with a few switches depending on whether it is a full or incremental backup. Most of the time, the NTbackup completes fine, and the wrapper then appends the NTbackup log into its own log before adding a few final comments and completing. The problem I am having is that sometimes, NTbackup seems to just... blank out. It always completes backup of the C: and E: drives, but then it will start the system state and not add any more messages into the event log saying it completed that. And the NTbackup log is left empty, since it doesn't write anything to the log until all the backup tasks are complete. This is causing the wrapper to append no text into its own log. That causes problems for us because we read the information out of that log to determine whether backups are failing. The wrapper task also reports that it is completing normally in the event log. Anyone ever seen a case where system state doesn't complete consistently? To be clear, the server is not logging any error messages anywhere. It's just not seeming to complete or log anything.

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• Is it a good idea to close and open hibernate sessions frequently?

  - by Gaurav

  Hi, I'm developing an application which requires that state of entities be read from a database at frequent intervals or triggers. However, once hibernate reads the state, it doesn't re-read it unless I explicitly close the session and read the entity in a new session. Is it a good idea to open a session everytime I want to read the entity and then close it afterwards? How much of an overhead does this put on the application and the database (we use a c3p0 connection pool also)? Will it be enough to simply evict the entity from the session before reading it again?

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• How to batch retrieve documents with mongoDB?

  - by edude05

  Hello everyone, I have an application that queries data from a mongoDB using the mongoDB C# driver something like this: public void main() { foreach (int i in listOfKey) { list.add(getObjectfromDB(i); } } public myObject getObjFromDb(int primaryKey) { document query = new document(); query["primKey"] = primaryKey; document result= mongo["myDatabase"]["myCollection"].findOne(query); return parseObject(result); } On my local (development) machine to get 100 object this way takes less than a second. However, I recently moved the database to a server on the internet, and this query takes about 30 seconds to execute for the same number of object. Furthermore, looking at the mongoDB log, it seems to open about 8-10 connections to the DB to perform this query. So what I'd like to do is have the query the database for an array of primaryKeys and get them all back at once, then do the parsing in a loop afterwards, using one connection if possible. How could I optimize my query to do so? Thanks, --Michael

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• Any active Bold for Delphi users ?

  - by Roland Bengtsson

  What are you using as a persistance framework when programming in Delphi? If the application is growing it soon became really complicated to handle the model in SQL ? Bold is a persistance framework for Delphi win32 that really deserve more attention. I use it daily and using OCL instead of SQL to get data from the database saves a lot of time and debugging. When the model is changed Bold translate this to an SQL script and change the database. EDIT: For those that are interested in Bold for Delphi I have spend this evening on create a site on Google about it. I'm not a guru in html so the design is maybe not so exciting. But I want comments and reactions about the site. You can leave the comments in this thread or at the bottom on the subpage. And the address is... http://sites.google.com/site/boldfordelphi/

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• ODBC Storage Size

  - by dcp3450

  I'm pulling a lot of text from a MS SQL Server database. I'm not getting all the text (which includes some html. The text is stored perfectly on the database. However, when I run the query to get the data It will only pull part of the text. I pull the data using odbc_exec and store using $variable = odbc_result($runquery,"body"). if i display the content with odbc_result_all($runquery) i get part of the content. if I use echo $body; i get part of the content then some garbage and part of the text from the begining. very strange response. Is there a size limit? Any ideas what I'm missing here?

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• Best way to code a webservice in weblogic?

  - by John

  I am new to Weblogic and J2ee. I need to build a webservice that simply runs a query on the backend database (DB2 zOS) and returns the results. Being new to this I have a few questions. 1) What is the best way to build the webservice? 2) How do I connect to the database with weblogic. 3) Is there a way to cache the data returned so that the next request for the same data is pulled from cache? If googled for this but there seems to be many way to handle this. I am looking for the best way that can handle a high volume of requests. Any links to sample code would be helpful. - Thanks

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• In MYSQL is it better to have one big table or many smaller tables

  - by user307922

  Hi All, I am making a database of my client's customers to send email promotions to. The database will include all about 12 of my clients and each of them has an average of 2100 customers. I was wondering if it would be better to have a table in the db for each one of my clients that contains a list of their customers or if I should just make one big table... The customers will be queried daily. I know it is a broad question but any advice would be appreciated. Cheers, Chuck

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• How to config Remote BLOB Storage(RBS) with Microsoft Dynamics CRM 4.0 ?

  - by jk

  Hi We have working site for Dynamic crm 4.0 and in it we are storing image into the database. Now database is growing very fast and server is dying.. now I want to enable the Remote BLOB Storage with Dynamic CRM 4.0. for that I tried to install RBS for testing but everywhere is configure with Sharepoint 2010 not with Dynamic Crm. Does anybody know how to install and configure with Dyanmic CRM 4.0? Does RBS with Standard Edition of SQL Server 2008? I followed following path to install but it with Sharepoint? http://technet.microsoft.com/en-us/library/ee663474.aspx Any help is appreciate. Thanks

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• What is the fastest way to get the persisted object after calling Hibernate's saveOrUpdate?

  - by Dave

  I'm using Hibernate 3.2.1.ga, hibernate annotations 3.2.1.ga, and hibernate-jpa-2.0-api. I can't upgrade at this time as I'm working with legacy code. I have this generic method for saving or updating objects ... protected void saveOrUpdate(Object obj) { final Session session = sessionFactory.getCurrentSession(); session.saveOrUpdate(obj); } You can assume that every argument, "obj," will have a member field that is marked with the "@Id" annotation. I would like to change the return type to return an Object that represents the persisted object in the database (meaning if "obj" didn't contain an id before, what is returned is the database object with a populated id. What is the fastest way to do this given my versioning and generic constraints?

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• Anonymous users support vs Google bot

  - by Andy

  I have a User class in my web app that represents a user currently logged in. Every time a user vists a page, a User instance is populated based on authentication data supplied in cookies. A User instance is created even if an anonymous user logs in - and a corresponding new record is created in the User table in the database. This approach allows me to save some state info for the current user regardless of its type. The problem however with this approach is the Google bot, and other non-human web organisms crawling my pages. Every time a bot starts to walk around the site, thousands of useless records will be created in the database, each of them only to be used for a single page. Question: what is the best trade off? How to support anonymous users, save their state, and don't get too much overhead because of cookieless bots?

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• Can i have drag and drop from jquey treeview to jquery fullcalendal

  - by Tarun

  Hi I want that i should be able to drag items from jquery treeview that supports drag and drop.Drop item onto Jquery full calendar with database interaction

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• Not sure what happens to my apps objects when using NSURLSession in background - what state is my app in?

  - by Avner Barr

  More of a general question - I don't understand the workings of NSURLSession when using it in "background session mode". I will supply some simple contrived example code. I have a database which holds objects - such that portions of this data can be uploaded to a remote server. It is important to know which data/objects were uploaded in order to accurately display information to the user. It is also important to be able to upload to the server in a background task because the app can be killed at any point. for instance a simple profile picture object: @interface ProfilePicture : NSObject @property int userId; @property UIImage *profilePicture; @property BOOL successfullyUploaded; // we want to know if the image was uploaded to out server - this could also be a property that is queryable but lets assume this is attached to this object @end Now Lets say I want to upload the profile picture to a remote server - I could do something like: @implementation ProfilePictureUploader -(void)uploadProfilePicture:(ProfilePicture *)profilePicture completion:(void(^)(BOOL successInUploading))completion { NSUrlSession *uploadImageSession = ..... // code to setup uploading the image - and calling the completion handler; [uploadImageSession resume]; } @end Now somewhere else in my code I want to upload the profile picture - and if it was successful update the UI and the database that this action happened: ProfilePicture *aNewProfilePicture = ...; aNewProfilePicture.profilePicture = aImage; aNewProfilePicture.userId = 123; aNewProfilePicture.successfullyUploaded = NO; // write the change to disk [MyDatabase write:aNewProfilePicture]; // upload the image to the server ProfilePictureUploader *uploader = [ProfilePictureUploader ....]; [uploader uploadProfilePicture:aNewProfilePicture completion:^(BOOL successInUploading) { if (successInUploading) { // persist the change to my db. aNewProfilePicture.successfullyUploaded = YES; [Mydase update:aNewProfilePicture]; // persist the change } }]; Now obviously if my app is running then this "ProfilePicture" object is successfully uploaded and all is well - the database object has its own internal workings with data structures/caches and what not. All callbacks that may exist are maintained and the app state is straightforward. But I'm not clear what happens if the app "dies" at some point during the upload. It seems that any callbacks/notifications are dead. According to the API documentation- the uploading is handled by a separate process. Therefor the upload will continue and my app will be awakened at some point in the future to handle completion. But the object "aNewProfilePicture" is non existant at that point and all callbacks/objects are gone. I don't understand what context exists at this point. How am I supposed to ensure consistency in my DB and UI (For instance update the "successfullyUploaded" property for that user)? Do I need to re-work everything touching the DB or UI to correspond with the new API and work in a context free environment?

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• Sql Server XML-type column duplicate entry detection

  - by aaaa bbbb

  In Sql Server I am using an XML type column to store a message. I do not want to store duplicate messages. I only will have a few messages per user. I am currently querying the table for these messages, converting the XML to string in my C# code. I then compare the strings with what I am about to insert. Unfortunately, Sql Server pretty-prints the data in the XML typed fields. What you store into the database is not necessarily exactly the same string as what you get back out later. It is functionally equivalent, but may have white space removed, etc. Is there an efficient way to compare an XML string that I am considering inserting with those that are already in the database? As an aside, if I detect a duplicate I need to delete the older message then insert the replacement.

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• How to use LVM on Rackspace Cloud

  - by batrick

  Dear all, I am trying to set up a simple but effective solution to make a backup of my rackspace cloud servers. These servers each run subversion, trac, and some database-backed custom php applications. My idea is to set up a LVM and mount a volume under, say, /srv. In this volume, I keep the data from all applications. Instead of caring about how to back-up each app in a different way (svn hotcopy, trac-admin hotcopy, huge mess for mysql), I simply take an LVM snapshot and back this one up cloud files using the excellent cloudcity script (http://github.com/jspringman/cloudcity/blob/master/cloudcity). The advantage of this solution is that it is quick and easy, and LVM allows to make decent backups. As more apps are added, it should not be required to change the backup script much. The downside, and main point of my question here, is that I am not sure how to get LVM working on Rackspace cloud, because there is only one root volume and no service like Amazon's EBS. I was thinking it may be possible to create a large empty file and use this as a "physical volume". Has anybody done anything like this before? Or do you know why it can never work? It would be great to hear from you. Thanks, batrick

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