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  • postgreSQL - pg_class question

    - by Sachin Chourasiya
    PostgreSQL stores statistics about tables in the system table called pg_class. The query planner accesses this table for every query. These statistics may only be updated using the analyze command. If the analyze command is not run often, the statistics in this table may not be accurate and the query planner may make poor decisions which can degrade system performance. Another strategy is for the query planner to generate these statistics for each query (including selects, inserts, updates, and deletes). This approach would allow the query planner to have the most up-to-date statistics possible. Why postgres always rely on pg_class instead?

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  • simplemodal contact form does not close after sending mail in ie8

    - by frank
    hi, i am using the simplemodal contact form for my website. it works perfectly on safari, firefox and opera on mac os, and firefox and chrome on windows. the only issue i have is with ie8. when i click the "send" button the mail is actually sent but i get an error message (alert window with "unknown" in it) and then everything seems to be in some infinite loop with the "loading.gif" turning and turning. it never gets to the step where i ahve the message "your mail has been sucessfully sent" although like i said the mail is sent. any idea where the problem is coming from ? thanks for your help. frank

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  • Is there a "vim runtime log"?

    - by Somebody still uses you MS-DOS
    Sometimes I try a customization/command in my vimrc. Everything seens to be correct, but it just doesn't work. It's difficult to know what's happening when vim starts, and know which command failed or not, so it's really difficult to debug what can be causing a problem in my vimrc. It's a trial-error approach, which is time consuming and really a PITA. For example, I'm having problems with snipmate plugin in some files and just don't have a clue on how to discover the problem. Is there a "runtime log" when vim starts, telling which commands it executed, which ones failed and such? This would help me a lot.

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  • Creating standalone, console (shell) for domain-specific operations

    - by mr.b
    Say that I have a system service, and I want to offer a low-level maintenance access to it. For that purpose, I'd like to create a standalone, console application that somehow connects to server process and lets user type in commands, allow it to use auto-completion and auto-suggestion on single/double TAB press (just like linux bash shell, mysql cli, cmd.exe, and countless others), allow command line editing capabilities (history, cursor keys to move around text..), etc. Now, it's not that much of a problem to create something like that by rolling my own from scratch, handling user input, scanning pressed keys, and doing correct actions. But, why reinvent the wheel? Is there some library/framework that helps with this kind of problems, just like readline library that offers improved command-line editing capabilities under linux? Of course, this new "shell" would respond only to valid, domain-specific commands, and would suggest valid arguments, options, switches... Any ideas? Thanks!

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  • facebook messages result set like part 2

    - by David
    Hey guys, I don't think I'm getting it right. Here is my most recent query that I believe is almost working. SELECT max(sender_id) as sender_id, subject, MAX(id) as message_id, MAX(created_at) as updated_at FROM messages where (recipient_id = #{current_user} and recipient_deleted = 'f') or sender_id = #{current_user} GROUP BY subject ORDER BY max(created_at) DESC ; Basically the goal is to fetch all recent messages of a user, group them by subject, and make sure that the photo that is showing up is the other party's photo, never the current user. (also need the most recent message body and message count but that is for another time) Here is what I think is wrong. doing max(sender_id) is wrong, since the current_user id could be higher than the sender's id. I am using the sender_id in the html page to fetch the user's photo.

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  • Checking online users with Facebook Javascript SDK

    - by Roman
    Hi, I'm trying to build some kind of a social game in facebook, where I need that every user that has approved my APP is able to receive notifications from me. When the user approves my App, I save his UID in the DB for future reference. At some later time, I want to make it possible for other users find partners for a game - so I need a way to pick randomly some user from my DB and check if he's online. Then, send him a message and propose to play with the current player. So 2 questions: How can I check if some user is online, using Javascript SDK? It seems that in the new Graph API I can't get the users' online status. How can I then send him a message and propose to play the game? When he approves to play - he is being forwarded to the game page. Many thanks in advance, Roman

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  • Best computer-science universities in Europe?

    - by Tom
    I am in 11th grade and only one year left when I finish my school. I am sure I want to dedicate my life to programming. In my country the education's level is not so high as in Europe, so I want to emigrate and study not just for a diploma, but for knowledge too. So, what universities would you suggest me which has subject Computer-Science? I prefer web programming. Please do not delete this message though it is quite offtopic, but it's the best place for me to get suggestions from advanced programmers who have already finished their university. And I hope here comes also teenagers who can make the best decision choosing university. Thank you. Please read the whole my message before voting to close this thread, thanks.

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  • Debugging "Incorrect Syntax" Exception

    - by MattH
    I have recently been working with a COM+ component that processes an input XML file, and makes a number of database updates based on the supplied data. Running SQL Profiler with EventClass Exception, and User Error Message selected, I see: Exception Error: 102, Severity: 15, State: 1 User Error Message Incorrect syntax near '3'. However I really want to see the full SQL that is being supplied by the COM+ component. Is there anyway for me using Profiler, or other, for me to intercept the SQL statement that was sent to the SQL Server? This machine is using SQL Server 2005, and the COM+ object is written in Delphi.

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  • nicely display file rename history in git log

    - by Jian
    The git command git log --format='%H' --follow -- foo.txt will give you the series of commits that touch foo.txt, following it across renames. I'm wondering if there's a git log command that will also print the corresponding historical file name beside each commit. It would be something like this, where we can interpret '%F' to be the (actually non-existent) placeholder for filename. git log --format='%H %F' --follow -- foo.txt I know this could be accomplished with git log --format='%H' --follow --numstat -- foo.txt but the output is not ideal since it requires some non-trivial parsing; each commit is strewn across multiple lines, and you'll still need to parse the file rename syntax ("bar.txt => foo.txt") to find what you're looking for.

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  • urlrewriter.net page not executed

    - by peter
    Hello, I'm having some problems with the module urlrewriter.net for ASP.NET. I have a multilingual site with a URL like this; ~/home.aspx To support languages I use this rewrite rule; <rewrite url="~/de-DE/(.*)" to="~/$1"></rewrite> Then in my code I get the de-DE part and set the right culture for the current thread. All of this works well. After I login on the website I get a message "Hello, user x" to show i'm logged in. When navigating to another page, it doesn't display this message anymore and it seems like the page comes from the cache or something with the old (not logged in) data. Also, when I attach the debugger, nothing is executed for this request. If I visit the page like ~/home.aspx instead of ~/de-DE/home.aspx, does problem does not occur. What could be the problem here? Thanks

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  • c# create an arbitrary length generic parameter string e.g. ?,?,?

    - by Sky Sanders
    I know I am forgetting to remember how to do this and it is late. I want to, in an elegant manner, build a placeholder list for a munged sql command. Have a command with an arbitrary number of parameters, need to build ?,?,? Did I mention that it was a wet brain fart? this is what came out: Regex.Replace(new string('?', _command.Parameters.Count), @"\?\?", @"\?,\?"); You are welcome to make me feel like more of an idiot if you just remember me what I am forgetting. ;-)

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  • How do I get a MessageBox like information window to appear in Java?

    - by John McClane
    I'm learning Java and I have no idea how to do this. I dragged a button on the form in Netbeans, double clicked it and it created this event: @Action public void HelloClickMethod() { JOptionPane.showMessageDialog(this, "The message!", "This is supposed to be the MessageBox title."); } This is the exception the IDE brings up. Cannot find symbol. Symbol: showMessageDialog() Edit 1 Now I changed it to this: @Action public void HelloClickMethod() { JOptionPane.showMessageDialog(this, "The message!", "This is supposed to be the MessageBox title.",JOptionPane.ERROR_MESSAGE); } However the IDE is saying I have an error in the word 'this'. "Cannot find symbol". I don't understand. Why is it so dificult and why are the errors so esoteric. :P

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  • Force NCover 1.5.8 to use v4 framework like testdriven.net does?

    - by Sam Holder
    I want to run coverage from the command line, but can't seem to get NCover 1.5.8 to instrument the code. It must be possible as when I run coverage tests with TestDriven.net it works. the difference seems to be that TD.NET is able to get NCover to use framework 4.0 (you get this in the log when it runs : MESSAGE: v4.0.30319) but from the command line I can't make it (I get this in the log : MESSAGE: v2.0.50727) So how can I make NCover play nice with nunit from the commandline, like it does with TD.NET?

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  • Issuing native system commands in Scala

    - by Tony
    I want to issue a native system command from a Scala program, and perhaps trap the output. ("ls" comes to mind. There may be other ways to get directory information without issuing the command, but that's beside the point of my question.) It would correspond to os.system(...) in Python. I've looked in "Programming in Scala". I've looked in O'Reilly's "Programming Scala". I've Googled several combinations of terms. No luck yet. Can someone out there give me an example, or point me at a resource where I can find an example?

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  • how to insert into database from stored procedure in log4net?

    - by Samreen
    I have to log thread context properties like this: string logFilePath = AppDomain.CurrentDomain.BaseDirectory + "log4netconfig.xml"; FileInfo finfo = new FileInfo(logFilePath); log4net.Config.XmlConfigurator.ConfigureAndWatch(finfo); ILog logger = LogManager.GetLogger("Exception.Logging"); log4net.ThreadContext.Properties["MESSAGE"] = exception.Message; log4net.ThreadContext.Properties["MODULE"] = "module1"; log4net.ThreadContext.Properties["COMPONENT"] = "component1"; logger.Debug("test"); and the configuration file is: <configuration> <configSections> <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,Log4net"/> </configSections> <log4net> <logger name="Exception.Logging" level="Debug"> <appender-ref ref="AdoNetAppender"/> </logger> <appender name="AdoNetAppender" type="log4net.Appender.AdoNetAppender"> <connectionString value="Data Source=xe;User ID=test;Password=test;" /> <connectionType value="System.Data.OracleClient.OracleConnection, System.Data.OracleClient, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /> <bufferSize value="10000"/> <commandText value="Log_Exception_Pkg.Insert_Log" /> <commandType value="StoredProcedure" /> <parameter> <parameterName value="@p_Error_Message" /> <dbType value="String" /> <size value="255" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%property{MESSAGE}"/> </layout> </parameter> <parameter> <parameterName value="@p_Module" /> <dbType value="String" /> <size value="225" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%property{MODULE}"/> </layout> </parameter> <parameter> <parameterName value="@p_Component" /> <dbType value="String" /> <size value="225" /> <layout type="log4net.Layout.PatternLayout"> <conversionPattern value="%property{COMPONENT}"/> </layout> </parameter> </appender> </log4net> </configuration> But its not inserting them in the database. How can I get that to work?

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  • C#: When should I use TryParse?

    - by zxcvbnm
    I understand it doesn't throw an Exception and because of that it might be sightly faster, but also, you're most likely using it to convert input to data you can use, so I don't think it's used so often to make that much of difference in terms of performance. Anyway, the examples I saw are all along the lines of an if/else block with TryParse, the else returning an error message. And to me, that's basically the same thing as using a try/catch block with the catch returning an error message. So, am I missing something? Is there a situation when this is actually useful?

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  • Why first arg to execve() must be path to executable

    - by EBM
    I understand that execve() and family require the first argument of its argument array to be the same as the executable that is also pointed to by its first argument. That is, in this: execve(prog, args, env); args[0] will usually be the same as prog. But I can't seem to find information as to why this is. I also understand that executables (er, at least shell scripts) always have their calling path as the first argument when running, but I would think that the shell would do the work to put it there, and execve() would just call the executable using the path given in its first argument ("prog" from above), then passing the argument array ("args" from above) as one would on the command line.... i.e., I don't call scripts on the command line with a duplicate executable path in the args list.... /bin/ls /bin/ls /home/john Can someone explain?

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  • What mail storage should I choose for our web application; IMAP, key-valud store, rdbms, ...

    - by tvrtko
    I have to store e-mail messages for use with our application. I have "metadata" for all messages inside a relational database, but I don't feel comfortable keeping message content (gigabytes and terabytes of email data) inside a database. I'm currently using IMAP as a storage, but I have my doubts if I choose correctly. First of all there is a problem of uidvalidity and how to keep a permanent reference to message inside IMAP. Second, I'm not sure if this is the most robust solution in terms of backup/restore strategies, corruption of store, replication ... Positive side is that I can query IMAP using the headers because the data is mostly indexed. I don't know if key-value stores are a better approach (Casandra, Tokyo cabinet, redis). How they handle storing 1KB and 50MB of data. How they prevent corruption and when corruption or device failure happens how can I repair the store.

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  • Menubar + Commandbar on WM 5.0 and WM 6.5.3

    - by heller.rublog
    I'm developing a Windows Mobile application, and I faced a problem with CCommandBar that combines toolbar and menubar. Well, I mean the following: m_wndCommandBar.InsertMenuBar(IDR_MAINFRAME); m_wndCommandBar.LoadToolBar(IDR_MAINFRAME); I have only one root menu option in my command bar and some buttons in toolbar. It works perfectly on Windows Mobile till version 6.5.3, but on WM 6.5.3 all toolbar buttons have the same dimensions as the menu item: screen. Is it possible to force WM 6.5.3 to draw command bar the same way as WM 5.0 did? Of cource I can use only toolbar and throw away my menubar, but I want to save the old UI. P.S. I'm sorry for my English mistakes. I was always failing at school :-(

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  • discovering files in the FileSystem, through SSIS

    - by cometbill
    I have a folder where files are going to be dropped for importing into my data warehouse. \\server\share\loading_area I have the following (inherited) code that uses xp_cmdshell shivers to call out to the command shell to run the DIR command and insert the resulting filenames into a table in SQL Server. I would like to 'go native' and reproduce this functionality in SSIS. Thanks in advance guys and girls. Here's the code USE MyDatabase GO declare @CMD varchar(500) declare @EXTRACT_PATH varchar(255) set @EXTRACT_PATH = '\\server\share\folder\' create table tmp_FILELIST([FILENUM] int identity(1,1), [FNAME] varchar(100), [FILE_STATUS] varchar(20) NULL CONSTRAINT [DF_FILELIST_FILE_STATUS] DEFAULT ('PENDING')) set @CMD = 'dir ' + @EXTRACT_PATH + '*.* /b /on' insert tmp_FILELIST([FNAME]) exec master..xp_cmdshell @CMD --remove the DOS reply when the folder is empty delete tmp_FILELIST where [FNAME] is null or [FNAME] = 'File Not Found' --Remove my administrative and default/common, files not for importing, such as readme.txt delete tmp_FILELIST where [FNAME] is null or [FNAME] = 'readme.txt'

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  • How to add values to a JSON object?

    - by Damiano
    Hello everybody, I have created an array with: var msg = new Array(); then, I have a function that add values to this array, this function is: function add(time, user, text){ var message = [time, user, text]; if (msg.length >= 50) msg.shift(); msg.push(message); } As you can see, if the array has 50 or more elements I remove the first with .shift(). Then I add an array as element. Ok, the code works perfectly, but now I have to loop the msg array to create a JSON obj. The JSON object should has this format: var obj = [ {'time' : time, 'user' : user, 'text' : text}, {'time' : time, 'user' : user, 'text' : text}, {'time' : time, 'user' : user, 'text' : text} ] I mean...i have to loop msg array and then store all the values inside the JSON object. I do not know how to "concatenate" the element of the array inside json obj. Could you help me? Thank you very much in advance!

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  • mounting without -o loop

    - by jumpinjoe
    Hi, I have written a dummy (ram disk) block device driver for linux kernel. When the driver is loaded, I can see it as /dev/mybd. I can successfully transfer data onto it using dd command, compare the copied data successfully. The problem is that when I create ext2/3 filesystem on it, I have to use -o loop option with the mount command. Otherwise mount fails with following result: mount: wrong fs type, bad option, bad superblock on mybd, missing codepage or helper program, or other error What could be the problem? Please help. Thanks.

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  • PHP and Apache environment variables

    - by Simon
    Hello, I want to pass an environment variable in linux to apache on start up. export MYVAR=5 --I define my environment variable on the command line PassEnv MYVAR --set apache to import the variable in apache config file apachectl restart --when I restart apache I don't get an error message. However I have noticed that if I do not create the environment variable in my first step, I get a warning message, so must be working here echo $_SERVER['MYVAR'] --i try to access the environment variable within PHP but it is not defined I've observed that if I try to PassEnv an environment variable that already exits (one that I havn't created myself) it works fine. The SetEnv directive also works fine. I'd really like to pass an environment variable to apache on the fly without writing it in a file. Help much appreciated. I'm using CentOS, PHP5 and Apache2. Thanks.

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