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  • MySql: Problem when using a temporary table

    - by Alex
    Hi, I'm trying to use a temporary tables to store some values I need for a query. The reason of using a temporary table is that I don't want to store the data permanently so different users can modify it at the same time. That data is just stored for a second, so I think a temporary table is the best approach for this. The thing is that it seems that the way I'm trying to use it is not right (the query works if I use a permanent one). This is an example of query: CREATE TEMPORARY TABLE SearchMatches (PatternID int not null primary key, Matches int not null) INSERT INTO SearchMatches (PatternID, Matches) VALUES ('12605','1'),('12503','1'),('12587','2'),('12456','1'), ('12457','2'),('12486','2'),('12704','1'),(' 12686','1'), ('12531','2'),('12549','1'),('12604','1'),('12504','1'), ('12586','1'),('12548','1'),('12 530','1'),('12687','2'), ('12485','1'),('12705','1') SELECT pat.id, signatures.signature, products.product, versions.version, builds.build, pat.log_file, sig_types.sig_type, pat.notes, pat.kb FROM patterns AS pat INNER JOIN signatures ON pat.signature = signatures.id INNER JOIN products ON pat.product = products.id INNER JOIN versions ON pat.version = versions.id INNER JOIN builds ON pat.build = builds.id INNER JOIN sig_types ON pat.sig_type = sig_types.id, SearchMatches AS sm INNER JOIN patterns ON patterns.id = sm.PatternID WHERE sm.Matches <> 0 ORDER BY sm.Matches DESC, products.product, versions.version, builds.build LIMIT 0 , 50 Any suggestion? Thanks.

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  • SQL Server - Multi-Column substring matching

    - by hamlin11
    One of my clients is hooked on multi-column substring matching. I understand that Contains and FreeText search for words (and at least in the case of Contains, word prefixes). However, based upon my understanding of this MSDN book, neither of these nor their variants are capable of searching substrings. I have used LIKE rather extensively (Select * from A where A.B Like '%substr%') Sample table A: ID | Col1 | Col2 | Col3 | ------------------------------------- 1 | oklahoma | colorado | Utah | 2 | arkansas | colorado | oklahoma | 3 | florida | michigan | florida | ------------------------------------- The following code will give us row 1 and row 2: select * from A where Col1 like '%klah%' or Col2 like '%klah%' or Col3 like '%klah%' This is rather ugly, probably slow, and I just don't like it very much. Probably because the implementations that I'm dealing with have 10+ columns that need searched. The following may be a slight improvement as code readability goes, but as far as performance, we're still in the same ball park. select * from A where (Col1 + ' ' + Col2 + ' ' + Col3) like '%klah%' I have thought about simply adding insert, update, and delete triggers that simply add the concatenated version of the above columns into a separate table that shadows this table. Sample Shadow_Table: ID | searchtext | --------------------------------- 1 | oklahoma colorado Utah | 2 | arkansas colorado oklahoma | 3 | florida michigan florida | --------------------------------- This would allow us to perform the following query to search for '%klah%' select * from Shadow_Table where searchtext like '%klah%' I really don't like having to remember that this shadow table exists and that I'm supposed to use it when I am performing multi-column substring matching, but it probably yields pretty quick reads at the expense of write and storage space. My gut feeling tells me there there is an existing solution built into SQL Server 2008. However, I don't seem to be able to find anything other than research papers on the subject. Any help would be appreciated.

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  • Is using a StringBuilder for writing XML ok?

    - by Jack Lawson
    It feels dirty. But maybe it isn't... is it ok to use a StringBuilder for writing XML? My gut instinct says "although this feels wrong, it's probably pretty darn performant because it's not loading extra libraries and overhead." Here's what it looks like. I'm building an OpenSearch XML doc based on the domain you come in from. public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/xml"; string domain = WebUtils.ReturnParsedSourceUrl(null); //returns something like www.sample.com string cachedChan = context.Cache[domain + "_opensearchdescription"] as String; if (cachedChan == null) { StringBuilder sb = new StringBuilder(); sb.Append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>"); sb.Append("<OpenSearchDescription xmlns=\"http://a9.com/-/spec/opensearch/1.1/\" xmlns:moz=\"http://www.mozilla.org/2006/browser/search/\">"); sb.Append(" <ShortName>Search</ShortName>"); sb.Append(" <Description>Use " + domain + " to search.</Description>"); sb.Append(" <Contact>[email protected]</Contact>"); sb.Append(" <Url type=\"text/html\" method=\"get\" template=\"http://" + domain + "/Search.aspx?q={searchTerms}\" />"); sb.Append(" <moz:SearchForm>http://" + domain + "/Search.aspx</moz:SearchForm>"); sb.Append(" <Image height=\"16\" width=\"16\" type=\"image/x-icon\">http://" + domain + "/favicon.ico</Image>"); sb.Append("</OpenSearchDescription>"); cachedChan = sb.ToString(); context.Cache.Insert(domain + "_opensearchdescription", cachedChan, null, DateTime.Now.AddDays(14), TimeSpan.Zero); } context.Response.Write(cachedChan); }

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  • Avoiding CheckStyle magic number errors in JDBC queries.

    - by Dan
    Hello, I am working on a group project for class and we are trying out CheckStyle. I am fairly comfortable with Java but have never touched JDBC or done any database work before this. I was wondering if there is an elegant way to avoid magic number errors in preparedStatement calls, consider: preparedStatement = connect.prepareStatement("INSERT INTO shows " + "(showid, showtitle, showinfo, genre, youtube)" + "values (default, ?, ?, ?, ?);"); preparedStatement.setString(1, title); preparedStatement.setString(2, info); preparedStatement.setString(3, genre); preparedStatement.setString(4, youtube); result = preparedStatement.executeUpdate(); The setString methods get flagged as magic numbers, so far I just added the numbers 3-10 or so to the ignore list for magic numbers but I was wondering if there was a better way to go about inserting those values into the statement. I also beg you for any other advice that comes to mind seeing that code, I'd like to avoid developing any nasty habits, e.g. should I be using Statement or is PreparedStatement fine? Will that let me refer to column names instead? Is that ideal? etc... Thanks!

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  • Dynamic SQL Server stored procedure

    - by Pinu
    ALTER PROCEDURE [dbo].[GetDocumentsAdvancedSearch] @SDI CHAR(10) = NULL ,@Client CHAR(4) = NULL ,@AccountNumber VARCHAR(20) = NULL ,@Address VARCHAR(300) = NULL ,@StartDate DATETIME = NULL ,@EndDate DATETIME = NULL ,@ReferenceID CHAR(14) = NULL AS BEGIN -- SET NOCOUNT ON added to prevent extra result sets from -- interfering with SELECT statements. SET NOCOUNT ON; -- DECLARE DECLARE @Sql NVARCHAR(4000) DECLARE @ParamList NVARCHAR(4000) SELECT @Sql = 'SELECT DISTINCT ISNULL(Documents.DocumentID, '') ,Person.Name1 ,Person.Name2 ,Person.Street1 ,Person.Street2 ,Person.CityStateZip ,ISNULL(Person.ReferenceID,'') ,ISNULL(Person.AccountNumber,'') ,ISNULL(Person.HasSetPreferences,0) ,Documents.Job ,Documents.SDI ,Documents.Invoice ,ISNULL(Documents.ShippedDate,'') ,ISNULL(Documents.DocumentPages,'') ,Documents.DocumentType ,Documents.Description FROM Person LEFT OUTER JOIN Documents ON Person.PersonID = Documents.PersonID LEFT OUTER JOIN DocumentType ON Documents.DocumentType = DocumentType.DocumentType LEFT OUTER JOIN Addressess ON Person.PersonID = Addressess.PersonID' SELECT @Sql = @Sql + ' WHERE Documents.SDI IN ( '+ QUOTENAME(@sdi) + ') OR (Person.AssociationID = ' + ''' 000000 + ''' + 'AND Person.Client = ' + QUOTENAME(@Client) IF NOT (@AccountNumber IS NULL) SELECT @Sql = @Sql + 'AND Person.AccountNumber LIKE' + QUOTENAME(@AccountNumber) IF NOT (@Address IS NULL) SELECT @Sql = @Sql + 'AND Person.Name1 LIKE' +QUOTENAME(@Address)+ 'AND Person.Name2 LIKE' +QUOTENAME(@Address)+ 'AND Person.Street1 LIKE' +QUOTENAME(@Address)+ 'AND Person.Street2 LIKE' +QUOTENAME(@Address)+ 'AND Person.CityStateZip LIKE' +QUOTENAME(@Address) IF NOT (@StartDate IS NULL) SELECT @Sql = @Sql + 'AND Documents.ShippedDate >=' +@StartDate IF NOT (@EndDate IS NULL) SELECT @Sql = @Sql + 'AND Documents.ShippedDate <=' +@EndDate IF NOT (@ReferenceID IS NULL) SELECT @Sql = @Sql + 'AND Documents.ReferenceID =' +QUOTENAME(@ReferenceID) -- Insert statements for procedure here -- PRINT @Sql SELECT @ParamList = '@Psdi CHAR(10),@PClient CHAR(4),@PAccountNumber VARCHAR(20),@PAddress VARCHAR(300),@PStartDate DATETIME ,@PEndDate DATETIME,@PReferenceID CHAR(14)' EXEC SP_EXECUTESQL @Sql,@ParamList,@Sdi,@Client,@AccountNumber,@Address,@StartDate,@EndDate,@ReferenceID --PRINT @Sql END ERROR Msg 102, Level 15, State 1, Line 23 Incorrect syntax near '000000'. Msg 105, Level 15, State 1, Line 23 Unclosed quotation mark after the character string 'AND Person.Client = [1 ]AND Person.AccountNumber LIKE[1]'.

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  • c# webbrowser | pushed realtime quotes

    - by Eric
    Hi, I am programmer and share trader. Before I have written a day trading application. Until last week it was possible to fetch realtime quotes from http://aktien.boerse.de/aktien_startseite.php?view=2&order=name%20asc&liste=prime&page=0 . Every time the site was surfed the quotes had changed. The HTML contents could then be decoded with regular expressions (regex). Problem They have stopped this service by today. Now the quotes are not realtime when surfing on the page. The only way to get stock quotes now is to use pushed quotes "Push starten"-Button. However I do not know how to basically fetch them in C#. When I create a webbrowser element the only way which I know to get the push quotes out of it is to give the webbrowser element the focus send key ctrl+A and ctrl+C and insert the data some where for decoding. This is not desired since the control is moved away from the user and in case some other control is clicked during the process this may result in unexpected behaviour. Question So is there a proper way to decode push stock quotes in C#? Thanks a lot in advance, --eric

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  • Ibatis startBatch() only works with SqlMapClient's own start and commit transactions, not with Sprin

    - by Brian
    Hi, I'm finding that even though I have code wrapped by Spring transactions, and it commits/rolls back when I would expect, in order to make use of JDBC batching when using Ibatis and Spring I need to use explicit SqlMapClient transaction methods. I.e. this does batching as I'd expect: dao.getSqlMapClient().startTransaction(); dao.getSqlMapClient().startBatch(); int i = 0; for (MyObject obj : allObjects) { dao.storeChange(obj); i++; if (i % DB_BATCH_SIZE == 0) { dao.getSqlMapClient().executeBatch(); dao.getSqlMapClient().startBatch(); } } dao.getSqlMapClient().executeBatch(); dao.getSqlMapClient().commitTransaction(); but if I don't have the opening and closing transaction statements, and rely on Spring to manage things (which is what I want to do!), batching just doesn't happen. Given that Spring does otherwise seem to be handling its side of the bargain regarding transaction management, can anyone advise on any known issues here? (Database is MySQL; I'm aware of the issues regarding its JDBC pseudo-batch approach with INSERT statement rewriting, that's definitely not an issue here)

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  • How to read a database record with a DataReader and add it to a DataTable

    - by Olga
    Hello I have some data in a Oracle database table(around 4 million records) which i want to transform and store in a MSSQL database using ADO.NET. So far i used (for much smaller tables) a DataAdapter to read the data out of the Oracle DataBase and add the DataTable to a DataSet for further processing. When i tried this with my huge table, there was a outofmemory exception thrown. ( I assume this is because i cannot load the whole table into my memory) :) Now i am looking for a good way to perform this extract/transfer/load, without storing the whole table in the memory. I would like to use a DataReader and read the single dataRecords in a DataTable. If there are about 100k rows in it, I would like to process them and clear the DataTable afterwards(to have free memory again). Now i would like to know how to add a single datarecord as a row to a dataTable with ado.net and how to completly clear the dataTable out of memory: My code so far: Dim dt As New DataTable Dim count As Int32 count = 0 ' reads data records from oracle database table' While rdr.Read() 'read n records and add them to a dataTable' While count < 10000 dt.Rows.Add(????) count = count + 1 End While 'transform data in the dataTable, and insert it to the destination' ' flush the dataTable after insertion' count = 0 End While Thank you very much for your response!

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  • How to refactor this database to allow sync. with smart clients?

    - by Anton Zvgny
    Howdy, I have inherited the following database: http://i46.tinypic.com/einvjr.png (EDIT: I cannot post images, so here goes the link) This currently runs 100% online thru an Asp.Net web app , but some employees will need to have offline access to this database to either get documents or to insert new documents for later synchronization when back to the office. What changes need to be made to this database scheme to support such scenario (sync smart clients with central web database)? Thanks! ps. I'm not an developer/dba, i'm just an mechanic engineer tasked with changing this app, so, take it easy on me :D ps1. We're using MSSQL Server for the online central database and MSSQL Compact for the smart client. ps2. the ImageGuid field of the images table is used to save the images to the file system. The web app takes the guid and create folders according to the first 3 initial letters to persist the image to the file system. ps3. The users of the smart client not always get server data first and then go modifying to sync later the changes. Most of the time they start working completely offline (with a blank local database) and later sync the data to the server. ps4. All the users of the smart client app have an account at the web app.

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  • Empty data problem - data layer or DAL?

    - by luckyluke
    I designing the new App now and giving the following question a lot of thought. I consume a lot of data from the warehouse, and the entities have a lot of dictionary based values (currency, country, tax-whatever data) - dimensions. I cannot be assured though that there won't be nulls. So I am thinking: create an empty value in each of teh dictionaries with special keyID - ie. -1 do the ETL (ssis) do the correct stuff and insert -1 where it needs to let the DAL know that -1 is special (Static const whatever thing) don't care in the code to check for nullness of dictionary entries because THEY will always have a value But maybe I should be thinking: import data AS IS let the DAL do the thinking using empty record Pattern still don't care in the code because business layer will have what it needs from DAL. I think is more of a approach thing but maybe i am missing something important here... What do You think? Am i clear? Please don't confuse it with empty record problem. I do use emptyCustomer think all the time and other defaults too.

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  • Post-loading : check if an image is in the browser cache

    - by Mathieu
    Short version question : Is there navigator.mozIsLocallyAvailable equivalent function that works on all browsers, or an alternative? Long version :) Hi, Here is my situation : I want to implement an HtmlHelper extension for asp.net MVC that handle image post-loading easily (using jQuery). So i render the page with empty image sources with the source specified in the "alt" attribute. I insert image sources after the "window.onload" event, and it works great. I did something like this : $(window).bind('load', function() { var plImages = $(".postLoad"); plImages.each(function() { $(this).attr("src", $(this).attr("alt")); }); }); The problem is : After the first loading, post-loaded images are cached. But if the page takes 10 seconds to load, the cached post-loaded images will be displayed after this 10 seconds. So i think to specify image sources on the "document.ready" event if the image is cached to display them immediatly. I found this function : navigator.mozIsLocallyAvailable to check if an image is in the cache. Here is what I've done with jquery : //specify cached image sources on dom ready $(document).ready(function() { var plImages = $(".postLoad"); plImages.each(function() { var source = $(this).attr("alt") var disponible = navigator.mozIsLocallyAvailable(source, true); if (disponible) $(this).attr("src", source); }); }); //specify uncached image sources after page loading $(window).bind('load', function() { var plImages = $(".postLoad"); plImages.each(function() { if ($(this).attr("src") == "") $(this).attr("src", $(this).attr("alt")); }); }); It works on Mozilla's DOM but it doesn't works on any other one. I tried navigator.isLocallyAvailable : same result. Is there any alternative?

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  • Asp.Net Cache, modify an object from cache and it changes the cached value

    - by Glen
    Hi, I'm having an issue when using the Asp.Net Cache functionality. I add an object to the Cache then at another time I get that object from the Cache, modify one of it's properties then save the changes to the database. But, the next time I get the object from Cache it contains the changed values. So, when I modify the object it modifies the version which is contained in cache even though I haven't updated it in the Cache specifically. Does anyone know how I can get an object from the Cache which doesn't reference the cached version? i.e. Step 1: Item item = new Item(); item.Title = "Test"; Cache.Insert("Test", item, null, DateTime.Now.AddHours(1), System.Web.Caching.Cache.NoSlidingExpiration); Step 2: Item item = (Item)Cache.Get("test"); item.Title = "Test 1"; Step 3: Item item = (Item)Cache.Get("test"); if(item.Title == "Test 1"){ Response.Write("Object has been changed in the Cache."); } I realise that with the above example it would make sense that any changes to the item get reflected in cache but my situation is a bit more complicated and I definitely don't want this to happen.

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  • Specify which xml file to load when link is clicked

    - by Jason
    Good morning, I would like it so when a link is clicked on the homepage it would load a particular xml file into the next page (the page is called category-list.apsx). This category list page uses the Repeater Control method to display the xml details on the page. I used the example shown here: http://www.w3schools.com/aspnet/aspnet_repeater.asp So at the moment the repeater script looks like: <script runat="server"> sub Page_Load if Not Page.IsPostBack then dim mycategories=New DataSet mycategories.ReadXml(MapPath("categories.xml")) categories.DataSource=mycategories categories.DataBind() end if end sub </script> After doing some research I did find someone with the same problem and the solution was to insert #tags as part of the link on the homepage (i.e. category-list.apsx#company1results) and then some script on the list page to pick up the correct xml file: <script type="text/javascript"> var old_onload = window.onload; // Play it safe by respecting onload handlers set by other scripts. window.onload=function() { var categories = document.location.href.substring(document.location.href.indexOf("#")+1); loadXMLDoc('XML/'+categories+'.xml'); old_onload(); } </script> This was from the following link: http://www.hotscripts.com/forums/javascript/45641-solved-specify-xml-file-load-when-click-link.html How can I get these two scripts to connect with each other? Thank you for your time

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  • why can't asp.net find my textbox?

    - by phunehehe
    Hello, I'm trying to add more fields to the CreateUserWizardStep, here is what I added: <asp:CreateUserWizardStep ID="CreateUserWizardStep1" runat="server"> <ContentTemplate> <table border="0"> <tr> <td align="right"> <asp:Label ID="NickNameLabel" runat="server" AssociatedControlID="NickName">Nick Name:</asp:Label> </td> <td> <asp:TextBox ID="NickName" runat="server"></asp:TextBox> <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="NickName" ErrorMessage="Nick Name is required." ToolTip="Nick Name is required." ValidationGroup="CreateUserWizard1">*</asp:RequiredFieldValidator> </td> </tr> <%-- The default code is left unchanged, but not shown here --%> </table> </ContentTemplate> </asp:CreateUserWizardStep> Then I tried to reference the objects like this protected void NewUserWizard_CreatedUser(object sender, EventArgs e) { CreateUserWizardStep step = NewUserWizard.FindControl("CreateUserWizardStep1") as CreateUserWizardStep; TextBox nickName= step.FindControl("NickName") as TextBox; // insert additional information to the database } The problem is, I'm getting nulls for nickName. Am I using FindControl("") incorrectly?

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  • Debugging NSoperation BAD ACCESS within graphics context

    - by Joe
    I tried everything to debug this one but I can't get to the bottom of it. This code lives in a subclass of NSOperation which is processed from a queue: (borders is an ivar NSArray containing 5 UIimage objects) NSMutableArray *images = [[NSMutableArray alloc] init]; for (unsigned i = 0; i < 5; i++) { CGSize size = CGSizeMake(60, 60); UIGraphicsBeginImageContext(size); CGPoint thumbPoint = CGPointMake(6, 6); [controller.image drawAtPoint:thumbPoint]; CGPoint borderPoint = CGPointMake(0, 0); [[borders objectAtIndex:i] drawAtPoint:borderPoint]; [images addObject:UIGraphicsGetImageFromCurrentImageContext()]; UIGraphicsEndImageContext(); } [images release]; The code works fine most of the time but when I push the iphone by access subviews and pressing lots of buttons on the UI I either get this exception which is trapped by the operation: Exception Load view: *** -[NSCFArray insertObject:atIndex:]: attempt to insert nil or I get this: Program received signal: “EXC_BAD_ACCESS”. The exception is caused because UIGraphicsGetImageFromCurrentImageContext() return nil. I don't know how to debug the EXC_BAD_ACCESS but I'm guessing that this error (in fact both of these errors) is caused by low memory. The debugger stops at the line: [controller.image drawAtPoint:thumbPoint]; As I mentioned I've trapped the exception so I can live with that but the EXC_BAD_ACCESS is more serious. IF this is memory related how can I tell and is it possible to increase the memory available to NSOperation?

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  • How to append new elements to Xml from a stream

    - by Wololo
    I have a method which returns some xml in a memory stream private MemoryStream GetXml() { XmlWriterSettings settings = new XmlWriterSettings(); settings.Indent = true; using (MemoryStream memoryStream = new MemoryStream()) { using (XmlWriter writer = XmlWriter.Create(memoryStream, settings)) { writer.WriteStartDocument(); writer.WriteStartElement("root"); writer.WriteStartElement("element"); writer.WriteString("content"); writer.WriteEndElement(); writer.WriteEndElement(); writer.WriteEndDocument(); writer.Flush(); } return memoryStream; } } In this example the format of the xml will be: <?xml version="1.0" encoding="utf-8"?> <root> <element>content</element> </root> How can i insert a new element under the root e.g <?xml version="1.0" encoding="utf-8"?> <root> <element>content</element> ----->New element here <------ </root> EDIT: Also please suggest the most efficient method as returning a memorystream may not be the best solution. The final xml will be passed to a custom HttpHandler so what are the best options for writing the output? context.Response.Write vs context.Response.OutputStream

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  • ASP.NET-MVC Page: image logo is not displaying while sending the email

    - by Rita
    Hi I have a page that sends an email on ASP.NET MVC Page. All the Text is displaying but the image is not displaying. Any workaround. Appreciate your responses. Here is my code: MailMessage mailMsg = new MailMessage(); mailMsg.IsBodyHtml = true; mailMsg.From = new MailAddress(ConfigurationManager.AppSettings["Email.Sender"]); mailMsg.To.Add(new MailAddress(email)); mailMsg.Subject = "Test mail to display the Logo in the email"; mailMsg.Body = " Test mail to display the Logo in the email; mailMsg.Body += Environment.NewLine + Environment.NewLine + "<html><body><img src=cid:companylogo/><br></body></html>"; //Insert Logo string logoPath = Server.MapPath(Links.Content.images.Amgen_MedInfo_Logo_jpg); // logo is placed in images folder LinkedResource logo = new LinkedResource(logoPath); logo.ContentId = "companylogo"; // done HTML formatting in the next line to display logo AlternateView aView = AlternateView.CreateAlternateViewFromString(mailMsg.Body, new System.Net.Mime.ContentType("text/html")); aView.LinkedResources.Add(logo); mailMsg.AlternateViews.Add(aView); mailMsg.IsBodyHtml = true; SmtpClient smtpClient = new SmtpClient(ConfigurationManager.AppSettings["SMTP"]); smtpClient.Send(mailMsg);

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  • bitset to dynamic bitset

    - by mr.bio
    Hi.. I have a function where i use bitset.Now i need to convert it to a dynamic bitset.. but i don't know how. Can somebody help me ? set<string> generateCandidates(set<string> ck,unsigned int k){ set<string> nk ; for (set<string>::const_iterator p = ck.begin( );p != ck.end( ); ++p){ for (set<string>::const_iterator q = ck.begin( );q != ck.end( ); ++q){ bitset<4> bs1(*p); bitset<4> bs2(*q); bs1|= bs2 ; if(bs1.count() == k){ nk.insert(bs1.to_string<char,char_traits<char>,allocator<char> >()); } } } return nk; }

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  • Am I correctly extracting JPEG binary data from this mysqldump?

    - by Glenn
    I have a very old .sql backup of a vbulletin site that I ran around 8 years ago. I am trying to see the file attachments that are stored in the DB. The script below extracts them all and is verified to be JPEG by hex dumping and checking the SOI (start of image) and EOI (end of image) bytes (FFD8 and FFD9, respectively) according to the JPEG wiki page. But when I try to open them with evince, I get this message "Error interpreting JPEG image file (JPEG datastream contains no image)" What could be going on here? Some background info: sqldump is around 8 years old vbulletin 2.x was the software that stored the info most likely php 4 was used most likely mysql 4.0, possibly even 3.x the column datatype these attachments are stored in is mediumtext My Python 3.1 script: #!/usr/bin/env python3.1 import re trim_l = re.compile(b"""^INSERT INTO attachment VALUES\('\d+', '\d+', '\d+', '(.+)""") trim_r = re.compile(b"""(.+)', '\d+', '\d+'\);$""") extractor = re.compile(b"""^(.*(?:\.jpe?g|\.gif|\.bmp))', '(.+)$""") with open('attachments.sql', 'rb') as fh: for line in fh: data = trim_l.findall(line)[0] data = trim_r.findall(data)[0] data = extractor.findall(data) if data: name, data = data[0] try: filename = 'files/%s' % str(name, 'UTF-8') ah = open(filename, 'wb') ah.write(data) except UnicodeDecodeError: continue finally: ah.close() fh.close() update The JPEG wiki page says FF bytes are section markers, with the next byte indicating the section type. I see some that are not listed in the wiki page (specifically, I see a lot of 5C bytes, so FF5C). But the list is of "common markers" so I'm trying to find a more complete list. Any guidance here would also be appreciated.

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  • Change Data Capture or Change Tracking - Same as Traditional Audit Trail Table?

    - by HardCode
    Before I delve into the abyss of Microsoft documentation any deeper, I'd like to know if someone experienced with Change Data Capture and Change Tracking know if one or both of these can be used to replace the traditional ... "Audit trail table copy of the 'real table' (all of the fields of the original table, plus date/time, user ID, and DML action field) inserted into by Triggers" ... setup for a database table audit trail, where the trigger populates the audit trail table (which is all manual work). The MSDN overview documentation explains at a high level what Change Data Capture and Change Tracking are, but it isn't clear enough to me, and doesn't state outright, that these tools can be used to replace the traditional audit trail tables we've made so often. Can someone with any experience using Change Data Capture and Change Tracking save me a lot of time, or confirm that I am spending time looking at the right tool? The critical part of our audit trail is capturing all changes to a table's fields (on INSERT, UPDATE, DELETE), when it happened, and who did it. These changes are commonly provided to an end user chronologically via an audit trail report. Which is another question ... Change Data Capture or Change Tracking is the solution, I'd assume that this data can be queried just like data from a normal table? EDIT: I need a permanent audit trail, irregardless of time. I see that Change Data Capture has to do with the transaction logs, so this sounds finite to me.

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  • Blob in Java/Hibernate/sql-server 2005

    - by Ramy
    Hi, I'm trying to insert an HTML blob into our sql-server2005 database. i've been using the data-type [text] for the field the blob will eventually live in. i've also put a '@Lob' annotation on the field in the domain model. The problem comes in when the HTML blob I'm attempting to store is larger than 65536 characters. Its seems that is the caracter-limit for a text data type when using the @Lob annotation. Ideally I'd like to keep the whole blob in tact rather than chunk it up into multiple rows in the database. I appreciate any help or insight that might be provided. Thanks! _Ramy Allow me to clarify annotation: @Lob @Column(length = Integer. MAX_VALUE) //per an answer on stackoverflow private String htmlBlob; database side (sql-server-2005): CREATE TABLE dbo.IndustrySectorTearSheetBlob( ... htmlBlob text NULL ... ) Still seeing truncation after 65536 characters... EDIT: i've printed out the contents of all possible strings (only 10 right now) that would be inserted into the Database. Each string seems to contain all cahracters, judging by the fact that the close html tag is present at the end of the string....

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  • Direct invocation vs indirect invocation in C

    - by Mohit Deshpande
    I am new to C and I was reading about how pointers "point" to the address of another variable. So I have tried indirect invocation and direct invocation and received the same results (as any C/C++ developer could have predicted). This is what I did: int cost; int *cost_ptr; int main() { cost_ptr = &cost; //assign pointer to cost cost = 100; //intialize cost with a value printf("\nDirect Access: %d", cost); cost = 0; //reset the value *cost_ptr = 100; printf("\nIndirect Access: %d", *cost_ptr); //some code here return 0; //1 } So I am wondering if indirect invocation with pointers has any advantages over direct invocation or vice-versa. Some advantages/disadvantages could include speed, amount of memory consumed performing the operation (most likely the same but I just wanted to put that out there), safeness (like dangling pointers) , good programming practice, etc. 1Funny thing, I am using the GNU C Compiler (gcc) and it still compiles without the return statement and everything is as expected. Maybe because the C++ compiler will automatically insert the return statement if you forget.

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  • Yet another Python Windows CMD mklink problem ... can't get it to work!

    - by Felix Dombek
    OK I have just posted another question which outlined my program but the specific problem was different. Now, my program just stops working without any message whatsoever. I'd be grateful if someone could help me here. I want to create symlinks for each file in a directory structure, all in one large flat folder, and have the following code by now: # loop over directory structure: # for all items in current directory, # if item is directory, recurse into it; # else it's a file, then create a symlink for it def makelinks(folder, targetfolder, cmdprocess = None): if not cmdprocess: cmdprocess = subprocess.Popen("cmd", stdin = subprocess.PIPE, stdout = subprocess.PIPE, stderr = subprocess.PIPE) print(folder) for name in os.listdir(folder): fullname = os.path.join(folder, name) if os.path.isdir(fullname): makelinks(fullname, targetfolder, cmdprocess) else: makelink(fullname, targetfolder, cmdprocess) #for a given file, create one symlink in the target folder def makelink(fullname, targetfolder, cmdprocess): linkname = os.path.join(targetfolder, re.sub(r"[\/\\\:\*\?\"\<\>\|]", "-", fullname)) if not os.path.exists(linkname): try: os.remove(linkname) print("Invalid symlink removed:", linkname) except: pass if not os.path.exists(linkname): cmdprocess.stdin.write("mklink " + linkname + " " + fullname + "\r\n") So this is a top-down recursion where first the folder name is printed, then the subdirectories are processed. If I run this now over some folder, the whole thing just stops after 10 or so symbolic links. Here is the output: D:\Musik\neu D:\Musik\neu\# Electronic D:\Musik\neu\# Electronic\# tag & reencode D:\Musik\neu\# Electronic\# tag & reencode\ChillOutMix D:\Musik\neu\# Electronic\# tag & reencode\Unknown D&B D:\Musik\neu\# Electronic\# tag & reencode\Unknown D&B 2 The program still seems to run but no new output is generated. It created 9 symlinks for some files in the # tag & reencode and the first three files in the ChillOutMix folder. The cmd.exe Window is still open and empty, and shows in its title bar that it is currently processing the mklink command for the third file in ChillOutMix. I tried to insert a time.sleep(2) after each cmdprocess.stdin.write in case Python is just too fast for the cmd process, but it doesn't help. Does anyone know what the problem might be?

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  • Trouble with an depreciated constrictor visual basic visual studio 2010

    - by VBPRIML
    My goal is to print labels with barcodes and a date stamp from an entry to a zebra TLP 2844 when the user clicks the ok button/hits enter. i found what i think might be the code for this from zebras site and have been integrating it into my program but part of it is depreciated and i cant quite figure out how to update it. below is what i have so far. The printer is attached via USB and the program will also store the entered numbers in a database but i have that part done. any help would be greatly Appreciated.   Public Class ScanForm      Inherits System.Windows.Forms.Form    Public Const GENERIC_WRITE = &H40000000    Public Const OPEN_EXISTING = 3    Public Const FILE_SHARE_WRITE = &H2      Dim LPTPORT As String    Dim hPort As Integer      Public Declare Function CreateFile Lib "kernel32" Alias "CreateFileA" (ByVal lpFileName As String,                                                                           ByVal dwDesiredAccess As Integer,                                                                           ByVal dwShareMode As Integer, <MarshalAs(UnmanagedType.Struct)> ByRef lpSecurityAttributes As SECURITY_ATTRIBUTES,                                                                           ByVal dwCreationDisposition As Integer, ByVal dwFlagsAndAttributes As Integer,                                                                           ByVal hTemplateFile As Integer) As Integer          Public Declare Function CloseHandle Lib "kernel32" Alias "CloseHandle" (ByVal hObject As Integer) As Integer      Dim retval As Integer           <StructLayout(LayoutKind.Sequential)> Public Structure SECURITY_ATTRIBUTES          Private nLength As Integer        Private lpSecurityDescriptor As Integer        Private bInheritHandle As Integer      End Structure            Private Sub OKButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OKButton.Click          Dim TrNum        Dim TrDate        Dim SA As SECURITY_ATTRIBUTES        Dim outFile As FileStream, hPortP As IntPtr          LPTPORT = "USB001"        TrNum = Me.ScannedBarcodeText.Text()        TrDate = Now()          hPort = CreateFile(LPTPORT, GENERIC_WRITE, FILE_SHARE_WRITE, SA, OPEN_EXISTING, 0, 0)          hPortP = New IntPtr(hPort) 'convert Integer to IntPtr          outFile = New FileStream(hPortP, FileAccess.Write) 'Create FileStream using Handle        Dim fileWriter As New StreamWriter(outFile)          fileWriter.WriteLine(" ")        fileWriter.WriteLine("N")        fileWriter.Write("A50,50,0,4,1,1,N,")        fileWriter.Write(Chr(34))        fileWriter.Write(TrNum) 'prints the tracking number variable        fileWriter.Write(Chr(34))        fileWriter.Write(Chr(13))        fileWriter.Write(Chr(10))        fileWriter.Write("A50,100,0,4,1,1,N,")        fileWriter.Write(Chr(34))        fileWriter.Write(TrDate) 'prints the date variable        fileWriter.Write(Chr(34))        fileWriter.Write(Chr(13))        fileWriter.Write(Chr(10))        fileWriter.WriteLine("P1")        fileWriter.Flush()        fileWriter.Close()        outFile.Close()        retval = CloseHandle(hPort)          'Add entry to database        Using connection As New SqlClient.SqlConnection("Data Source=MNGD-LABS-APP02;Initial Catalog=ScannedDB;Integrated Security=True;Pooling=False;Encrypt=False"), _        cmd As New SqlClient.SqlCommand("INSERT INTO [ScannedDBTable] (TrackingNumber, Date) VALUES (@TrackingNumber, @Date)", connection)            cmd.Parameters.Add("@TrackingNumber", SqlDbType.VarChar, 50).Value = TrNum            cmd.Parameters.Add("@Date", SqlDbType.DateTime, 8).Value = TrDate            connection.Open()            cmd.ExecuteNonQuery()            connection.Close()        End Using          'Prepare data for next entry        ScannedBarcodeText.Clear()        Me.ScannedBarcodeText.Focus()      End Sub

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  • How do you deal with denormalization / secondary indexes in database sharding?

    - by Continuation
    Say I have a "message" table with 2 secondary indexes: "recipient_id" "sender_id" I want to shard the "message" table by "recipient_id". That way to retrieve all messages sent to a certain recipient I only need to query one shard. But at the same time, I want to be able to make a query that ask for all messages sent by a certain sender. Now I don't want to send that query to every single shard of the "message" table. One way to do this is to duplicate the data and have a "message_by_sender" table sharded by "sender_id". The problem with that approach is that every time a message has been sent, I need to insert the message into both "message" and "message_by_sender" tables. But what if after inserting into "message" the insertion into "message_by_sender" fail? In that case the message exists in "message" but not in "message_by_sender". How do I make sure that if a message exists in "message" then it also exists in "message_by_sender" without resorting to 2 phase commit? This must be a very common issue for anyone who shards their databases. How do you deal woth it?

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