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  • NHibernate: Mapping different dynamic components based on a discriminator

    - by George Mauer
    My domain entities each have a set of "fixed" properties and a set of "dynamic" properties which can be added at runtime. I handle this by using NHibernate's dynamic-component functionality. public class Product { public virtual Guid Id { get; } public virtual string Name { get; set;} public virtual IDictionary DynamicComponents { get; } } Now I have the following situation public class Customer { public virtual Guid Id { get; } public virtual string Type { get; set;} public virtual IDictionary DynamicProperties { get; } } Where a CustomerType is something like "Online" or "InPerson". Furthermore an Online customer has dynamic properties "Name" and "IPAddress" and an InPerson Customer has dynamic properties "Name" and "Salesman". Which customer types are available and the extra properties on them are configured in meta-data which is used to generate hbm files on application start. I could figure out some way to knock this together using an intermediate DTO layer, but is there any support in NHibernate for this scenario? The only difficulty seems to be that all the different "types" of customer map to the same Customer class.

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  • Could not load type from assembly error

    - by George Mauer
    I have written the following simple test in trying to learn Castle Windsor's Fluent Interface: using NUnit.Framework; using Castle.Windsor; using System.Collections; using Castle.MicroKernel.Registration; namespace WindsorSample { public class MyComponent : IMyComponent { public MyComponent(int start_at) { this.Value = start_at; } public int Value { get; private set; } } public interface IMyComponent { int Value { get; } } [TestFixture] public class ConcreteImplFixture { [Test] public void ResolvingConcreteImplShouldInitialiseValue() { IWindsorContainer container = new WindsorContainer(); container.Register(Component.For<IMyComponent>().ImplementedBy<MyComponent>().Parameters(Parameter.ForKey("start_at").Eq("1"))); IMyComponent resolvedComp = container.Resolve<IMyComponent>(); Assert.AreEqual(resolvedComp.Value, 1); } } } When I execute the test through TestDriven.NET I get the following error: System.TypeLoadException : Could not load type 'Castle.MicroKernel.Registration.IRegistration' from assembly 'Castle.MicroKernel, Version=1.0.3.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc'. at WindsorSample.ConcreteImplFixture.ResolvingConcreteImplShouldInitialiseValue() When I execute the test through the NUnit GUI I get: WindsorSample.ConcreteImplFixture.ResolvingConcreteImplShouldInitialiseValue: System.IO.FileNotFoundException : Could not load file or assembly 'Castle.Windsor, Version=1.0.3.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc' or one of its dependencies. The system cannot find the file specified. If I open the Assembly that I am referencing in Reflector I can see its information is: Castle.MicroKernel, Version=1.0.3.0, Culture=neutral, PublicKeyToken=407dd0808d44fbdc and that it definitely contains Castle.MicroKernel.Registration.IRegistration What could be going on? I should mention that the binaries are taken from the latest build of Castle though I have never worked with nant so I didn't bother re-compiling from source and just took the files in the bin directory. I should also point out that my project compiles with no problem.

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  • Deploying a Hello Word Silverlight app to IIS5, Win XP

    - by George
    Besides adding these File Types to IIS and installing the .NET framework 4.0 to the Web Server, what else do I need to do to get a Hello Word Silver Light web app to work? is there a separate Silverlight installation needed? Though the web site works when I deploy locally, I am getting the following error after deploying to a remote web server: Line: 54 Error: Unhandled Error in Silverlight Application Code: 2104 Category: InitializeError Message: Could not download the Silverlight application. Check web server settings

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  • Update Panel error: Control with the ID "xxx" could not be found in the UpdatePanel

    - by George
    I have a composite drop down calendar user control that consists of a textbox and and calendar image and a validation control. I expose a property called "TextBox" on the usercontrol which returns a reference to the textbox used within the control. This is the textbox that the user enters the date into. In the ASPX page, I have an instance of this usercontrol: <uc1:DropDownCalendar ID="dtmDateFirstEntry" runat="server" Required="True" /> In my code behind, I want to detect when a user has tabbed off of the textbox and, using an UpdatePanel, referesh an appropriate message depending on the date that was specified. Elsewhere in the ASPX page I have this: <asp:UpdatePanel ID="upIntendedStay" runat="server"> <ContentTemplate> <asp:Label ID="Label4" runat="server" Text="Update this text from server" CssClass="ErrorText"></asp:Label> </ContentTemplate> </asp:UpdatePanel> Here's what I do in the code behind: If Not Me.IsPostBack Then dtmDateFirstEntry.TextBox.AutoPostBack = True Dim trigger As New AsyncPostBackTrigger trigger.ControlID = dtmDateFirstEntry.TextBox.ClientID trigger.EventName = "onChange" upIntendedStay.Triggers.Add(trigger) End If When the page runs and I view the source, I see something like this: <input id="ctl00_phPageContent_dtmDateFirstEntry_txtDate" class="DefaultTextBox" name="ctl00$phPageContent$dtmDateFirstEntry$txtDate" onchange="javascript:setTimeout('__doPostBack(\'ctl00$phPageContent$dtmDateFirstEntry$txtDate\',\'\')', 0)" onkeypress="if (WebForm_TextBoxKeyHandler(event) == false) return false;" style="width: 112px;" type="text" value="Mar-29-2010" /> <input id="ctl00_phPageContent_dtmDateFirstEntry_imgDate" name="ctl00$phPageContent$dtmDateFirstEntry$imgDate" src="images/calendar.JPG" style="border-width: 0px;" type="image" />&nbsp; When I run it, I get this error: A control with ID 'ctl00_phPageContent_dtmDateFirstEntry_txtDate' could not be found for the trigger in UpdatePanel 'upIntendedStay'. I didn't think that the trigger control had to be within the UpdatePanel. I thought that was the whole point of adding the trigger. How do I refresh this update panel changes to the text in the date usercontrol. Next I will have to add other triggers to trigger the refreshing of the Update Panel from other controls scattered across the page, so clearly all of the trigger sources cannot be within the UpdatePanel.

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  • How to convert an object into a double?

    - by george t.
    I am working on VS C# on the following code, which converts an user input math expression and computes it. MSScriptControl.ScriptControl sc = new MSScriptControl.ScriptControl(); sc.Language = "VBScript"; sc.ExecuteStatement( "function pi\n" + "pi = 3.14159265\n" + "end function"); sc.ExecuteStatement( "function e\n" + "e = exp(1)\n" + "end function"); expression = textBox1.Text.ToString(); expression = expression.Replace("x", i.ToString()); object y = sc.Eval(expression); string k = y.ToString(); double result = double.Parse(k); While this outputs onto the console with the correct result, I want to use the values to make a graph of the function user inputs and it's not doing it correctly. Thank you for your help.

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  • Draw simple circle in XNA

    - by George Johnston
    I want to draw a 2d, filled, circle. I've looked everywhere and cannot seem to find anything that will even remotely help me draw a circle. I simply want to specify a height and width and location on my canvas. Anyone know how? Thanks!

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  • Offloading to HLSL/GPU without displaying?

    - by George R
    As far as I know, certain mathematical functions like FFTs and perlin noise, etc. can be much faster when done on the GPU as a pixel shader. My question is, if I wanted to exploit this to calculate results and stream to bitmaps, could I do it without needing to actually display it in Silverlight or something? More specifically, I was thinking of using this for large terrain generation involving lots of perlin and other noises, and post-processing like high passes and deriving normals from heightmaps, etc, etc.

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  • VS2010. Dropdownlist Autopostback works in IDE, not when deployed

    - by George
    I have a VS2010 RC ASP.NET web page,when a user changes the drop down selection on an auto postback dropdown, it refreshes a small grid and a few labels in various places on the page. I know wrapping a whole page in a big UpdatePanel control will cause horror from many of you, but that's what I did. I really didn't want a full page refresh and I didn't know how to update a table on the client side using Javascript and I figured it would be a big change. Suggestions for avoiding this are welcomed, but my main desire is to understand teh error I am getting. When I do the auto postbacks in the IDE, everything works fine, but if I deploy the code (IIS 5.5 on XP), the second auto postback works but the seconds one gives me his error. Ajax is one big nasty blackbox to me. Can someone help, please? Webpage error details User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; InfoPath.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; InfoPath.2; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; MS-RTC LM 8; MS-RTC EA 2; OfficeLiveConnector.1.4; OfficeLivePatch.1.3; .NET4.0C; .NET4.0E) Timestamp: Sun, 28 Mar 2010 17:23:23 UTC Message: Sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object. Line: 796 Char: 13 Code: 0 URI: http://localhost/BESI/ScriptResource.axd?d=3HKc1zGdeSk2WM7LpI9tTpMQUN7bCfQaPKi6MHy3P9dace9kFGR5G-jymRLHm0uxZ0SqWlVSWl9vAWK5JiPemjSRfdtUq34Dd5fQ3FoIbiyQ-hcum21C-j06-c0YF7hE0&t=5f011aa5 Message: Sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object. Line: 796 Char: 13 Code: 0 URI: http://localhost/BESI/ScriptResource.axd?d=3HKc1zGdeSk2WM7LpI9tTpMQUN7bCfQaPKi6MHy3P9dace9kFGR5G-jymRLHm0uxZ0SqWlVSWl9vAWK5JiPemjSRfdtUq34Dd5fQ3FoIbiyQ-hcum21C-j06-c0YF7hE0&t=5f011aa5 Message: Sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object. Line: 796 Char: 13 Code: 0 URI: http://localhost/BESI/ScriptResource.axd?d=3HKc1zGdeSk2WM7LpI9tTpMQUN7bCfQaPKi6MHy3P9dace9kFGR5G-jymRLHm0uxZ0SqWlVSWl9vAWK5JiPemjSRfdtUq34Dd5fQ3FoIbiyQ-hcum21C-j06-c0YF7hE0&t=5f011aa5

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  • Inversion of Control Container for PHP?

    - by George Mauer
    I am trying to code TDD style in PHP and one of my biggest stumbling blocks (other than lack of a decent IDE) is that I have to make my own hacked together IoC container just to inject all my mock objects properly. Has anyone used an Ioc container in php? All I've been able to find is PHP IOC on the ever-annoying phpclasses.org and it seems to have almost no documentation and not much of a following.

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  • DevExpress ASP.NET MVC Combobox not showing the values

    - by Taskos George
    In my PartialView I add a grid with a column that I need to be a combobox in this way. settings.Columns.Add(column => { column.FieldName = "TheFieldName"; column.Caption = ""ACaption; column.ColumnType = MVCxGridViewColumnType.ComboBox; var comboBoxProperties = column.PropertiesEdit as ComboBoxProperties; comboBoxProperties.DataSource = ViewData["MyListOfObjects"]; comboBoxProperties.TextField = "Description"; comboBoxProperties.ValueField = "Description"; comboBoxProperties.ValueType = typeof(String); }); The ViewData is populated in the Index method of the Controller and I have checked that it is populated with objects that contain values. The Combobox in the PopupEditForm not showing anything. Any idea what could be wrong? Regards.

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  • Python PyQt Timer Firmata

    - by George Cullins
    Hello. I am pretty new to python and working with firmata I am trying to play around with an arduino . Here is what I want to happen: Set arduino up with an LED as a digital out Set potentiometer to analog 0 Set PyQt timer up to update potentiometer position in application Set a threshold in PyQt to turn LED on (Analog in has 1024bit resolution, so say 800 as the threshold) I am using this firmata library : Link Here is the code that I am having trouble with: import sys from PyQt4 import QtCore, QtGui from firmata import * # Arduino setup self.a = Arduino('COM3') self.a.pin_mode(13, firmata.OUTPUT) # Create timer self.appTimer = QtCore.QTimer(self) self.appTimer.start(100) self.appTimer.event(self.updateAppTimer()) def updateAppTimer(self): self.analogPosition = self.a.analog_read(self, 0) self.ui.lblPositionValue.setNum() I am getting the error message: Traceback (most recent call last): File "D:\Programming\Eclipse\IO Demo\src\control.py", line 138, in myapp = MainWindow() File "D:\Programming\Eclipse\IO Demo\src\control.py", line 56, in init self.appTimer.event(self.updateAppTimer()) File "D:\Programming\Eclipse\IO Demo\src\control.py", line 60, in updateAppTimer self.analogPosition = self.a.analog_read(self, 0) TypeError: analog_read() takes exactly 2 arguments (3 given) If I take 'self' out I get the same error message but that only 1 argument is given What is python doing implicitly that I am not aware of? Blockquote

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  • TIBCO ActiveDatabase Error

    - by George
    Folks, I am with the following error when trying to start an instance of the Publish ActiveDatabase. I'm using Designer 5.7.2 and trying to access a database of SqlServer 2008. Someone saw this error before? I don´t find any reference in Google or other sites! Adaptador_M2M.Adaptador_M2M Error [Adapter] AEADB-910005 Startup Error. SDK Exception Code = AESDKC-0087, Category = Metadata, Severity = errorRole, Description = Class description not available for: ADB_PREREGLISTENER, File = C:/suren/workspace/Maverick/maverick-5.6.1-dev/libmaverick/MInstanceImpl.cpp, line = 71 received on starting the adapter after initialization. The Repository URL is D:\TEMP\AT_adadb_61214.dat and the Configuration URL is Corporativo/IntegracaoM2M/Adaptadores/Adaptador_M2M.

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  • jQuery Validation, multiple form ids for same function

    - by George
    Hi have two forms with the exact same validation rules, but different ids that I'd like to combine into just one function. How can I do that? var validator = $("#ValidateForm1").validate({ errorPlacement: function(error, element) { if ( element.is(":radio") ) error.appendTo( element.parent().next().next() ); else if ( element.is(":checkbox") ) error.appendTo ( element.next() ); else error.appendTo( element.parent().next() ); } }); var validator = $("#validateForm2").validate({ errorPlacement: function(error, element) { if ( element.is(":radio") ) error.appendTo( element.parent().next().next() ); else if ( element.is(":checkbox") ) error.appendTo ( element.next() ); else error.appendTo( element.parent().next() ); } });

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  • How to create a Word document from a Silverlight 4 application

    - by George Durzi
    I'm looking for some options to programmatically create a Word document from within a Silverlight 4 application. I found two approaches which seemed promising at first but don't look like they will work. OpenXML SDK The OpenXML SDK isn't available for Silverlight at this time. Word Automation via COM Interop dynamic wordApplication = AutomationFactory.CreateObject("Word.Application"); Apparently this requires that the Silverlight 4 application be granted permission to run with elevated privileges, which is only available for out-of-browser applications (which ours isn't) My other thought is to hand off the request to a back-end service which doesn't have these limitations. Wanted to check for any ideas before going down that path. Thank you!

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  • MySql timeouts - Should I set autoReconnect=true in Spring application?

    - by George
    After periods of inactivity on my website (Using Spring 2.5 and MySql), I get the following error: org.springframework.dao.RecoverableDataAccessException: The last packet sent successfully to the server was 52,847,830 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem. According to this question, and the linked bug, I shouldn't just set autoReconnect=true. Does this mean I have to catch this exception on any queries I do and then retry the transaction? Should that logic be in the data access layer, or the model layer? Is there an easy way to handle this instead of wrapping every single query to catch this?

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  • Pass client side js variable into server side jscript

    - by George
    How can I get the query string from the browser url using client side js and set it as a variable to use in some server side scripting? Client side script: var project = getQueryString("P"); function getQueryString(param) { var queryString = window.location.search.substring(1); splitQueryString = queryString.split("&"); for (i=0; i<splitQueryString.length; i++) { query = splitQueryString[i].split("="); if (query[i] == param) { return query[1]; } } } Server side script: response.write ('<td><a href="/index.asp?P=' + project + ">' + obj.BODY[i].NAME + '</a></td>');

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  • TIBCO Designer - Active Database Error

    - by George
    Folks, I am with the following error when trying to start an instance of the Publish ActiveDatabase. I'm using Designer 5.7.2 and trying to access a database of SqlServer 2008. Someone saw this error before? I don´t find any reference in Google or other sites! Adaptador_M2M.Adaptador_M2M Error [Adapter] AEADB-910005 Startup Error. SDK Exception Code = AESDKC-0087, Category = Metadata, Severity = errorRole, Description = Class description not available for: ADB_PREREGLISTENER, File = C:/suren/workspace/Maverick/maverick-5.6.1-dev/libmaverick/MInstanceImpl.cpp, line = 71 received on starting the adapter after initialization. The Repository URL is D:\TEMP\AT_adadb_61214.dat and the Configuration URL is Corporativo/IntegracaoM2M/Adaptadores/Adaptador_M2M.

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  • ASPNETDB and ASPSTATE database. How to change the connectionstrings?

    - by George
    I have two ASP-specific SQL Server databases 1) ASPState - To store session state 2) ASPNETDB - To store Security/Role stuff. In my web.config, I am specifying the connection string used to identify the location of the APState database: <sessionState mode="SQLServer" sqlConnectionString="server=(local)\sql2008b;uid=sa;pwd=iainttelling;" timeout="120"/> Where is the conenction string specified for the ASPNETDB database? I am trying to point it to a db on a remote server. I have a feeling it is somewhere in IIS orthe Machine Config. I'd like to add it to my WEB.CONFIG Could someone help me to do this?

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  • Using jstl tags in a dynamically created div

    - by George
    I want to be able to show some data based on criteria the user enters in a text field. I can easily take this data, process the form post, and show the data on another page. However, I want to be able to do it all on the same page - they click the button, and a new div shows up with the information. This doesn't seem too complicated, but I want to use jstl tags to format the data like: <c:forEach items="${model.data}" var="d"> <tr> <td><fmt:formatDate type="date" dateStyle="short" timeStyle="default" value="${d.reportDate}" /></td> <td><c:out value="${d.cardType}"/></td> </tr> </c:forEach> If jstl tags are processed when the page loads, can I use that in this new div? Can I update it via a javascript (using prototype) function to display the proper data? Will I be able to do the same thing if they change the criteria and click the submit button again?

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  • Ajaxtoolkit TextboxWatermarkExtender: How to change the text from Javascript

    - by George
    I think thaAjaxControlToolkitTextBoxWrapperThis use to work, but I think that upgrading to te latest version of teh Toolkit (4 something) broke it: var txtExpireYear = document.getElementById("ctl00_phPageContent_dtmPassportExpirationDate_txtYear"); txtExpireYear.AjaxControlToolkitTextBoxWrapper.set_Value(dtmDateOfExpire.getFullYear()); I now get the error: Microsoft JScript runtime error: 'AjaxControlToolkitTextBoxWrapper' is null or not an object Executing this: txtExpireYear.innerText="value1" txtExpireYear.value="value2" results in the watermark text being changed, not the textbox's text.

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  • An existing connection was forcibly closed by the remote host

    - by George
    I have a fat VB.NET Winform client that is using the an old asmx style web service. Very often, when I perform query that takes a while, I get the subject error. The error happenes The error seems to occur in < 1 min, which is far less that the web service timeout value that I have set or the timeout value on the ADO Command object that is performing the query within the web server. It seems to occur whenever I am performing a large query that expects to return a lot of rows or when I am sending up a large amount of data to the web service. For example, it just occurred when I was passing a large dataset to the web server: System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a receive. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host at System.Net.Sockets.Socket.Receive(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags) at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) --- End of inner exception stack trace --- at System.Net.Sockets.NetworkStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.PooledStream.Read(Byte[] buffer, Int32 offset, Int32 size) at System.Net.Connection.SyncRead(HttpWebRequest request, Boolean userRetrievedStream, Boolean probeRead) --- End of inner exception stack trace --- at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse(WebRequest request) at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse(WebRequest request) at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters) at Smit.Pipeline.Bo.localhost.WsSR.SaveOptions(String emailId, DataSet dsNeighborhood, DataSet dsOption, DataSet dsTaskApplications, DataSet dsCcUsers, DataSet dsDistinctUsers, DataSet dsReferencedApplications) in C:\My\Code\Pipeline2\Smit.Pipeline.Bo\Web References\localhost\Reference.vb:line 944 at Smit.Pipeline.Bo.Options.Save(TaskApplications updatedTaskApplications) in I've been looking a tons of postings on this error and it is surprising at how varied the circumstances which cause this error are. I've tried messing with Wireshark, but I am clueless how to use it. This application only has about 20 users at any one time and I am able to reproduce this error in the middle of the night when probably no one is using the app, so I don't think that the number of requests to the web server or to the database is high. It's probably one right now when I just got the error now. It seems to have to do everything with the amt of data being passed in either direction. This error is really chronic and killing me. Please help.

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  • Printer deployment via Group Policy not working on a single system

    - by Aron Rotteveel
    One of my coworkers just got a new laptop running Windows 7 Pro x64. We use a GPO to deploy the printers to every system, but for some reason it is not working on this system. I have been breaking my head over this for the past 3 hours now without any result. The strange thing is that gpresult /H seems to indicate that the GPO did run. The hardware: Laptop: Windows 7 Professional x64 Print server: Windows Server 2008 x64 R1 HP Color LaserJet 2605dn HP LaserJet P2015 Driver packages on server: HP universal printer driver PCL5, both X86 as X64 Oddities and other info: GPO working flawlessly on every other system, including my own Windows 7 Ultimate X64 laptop gpresult /H shows the GPO being ran Windows Firewall completely disabled on the new laptop Below is the output for gpresult /H (in Dutch sadly, but I think you'll recognize it): Beleidsregels Windows-instellingen Printerverbindingen Pad Dominerend groepsbeleidsobject \\Server2008\HP Color LaserJet 2605dn Printers \\Server2008\HP LaserJet P2015 Printers Beheersjablonen Beleidsdefinities (ADMX-bestanden) opgehaald van de lokale computer. Configuratiescherm/Printers Beleid Instelling Dominerend groepsbeleidsobject Beperkingen van point-and-print Uitgeschakeld Printers Like I said, I have been trying to figure this out for the past few hours or so without any result, so you are my last hope. Any help is appreciated.

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  • MySql multiple selects batching in .net

    - by Amith George
    I have a situation in my application. For each x-axis point in my chart, I am plotting 5 y-axis values. To calculate each of these 5 values, I need to make 4 different queries. Ie, for each x-axis point I need to fire 20 sql queries. Now, I need to plot 40 such points in the my chart. Its resulting in a pathetic performance where it takes close to a minute to get all the data back from the database. Each of 4 different queries consists of a join between 2 tables. One has only 6 rows. The other close to 10,000. Each of the 4 queries has different WHERE clauses, so they are different queries. For each point in the x-axis, only the values for the where clauses change. I have tried combining each of the 4 queries into one big string. Basically batch the four selects. These are again batched for each y-axis value. So, for each x-axis point, I am now firing one big command that consists of 20 different select statements. Technically, I should be experiencing a big performance boost, right? Instead of hitting the db 40x5x4 = 800 times, I am now hitting it just 40 times. But instead of taking 60 seconds, it taking 50-55 seconds... not much of a help. I am using MySql 5.1, and the 6.1 version of its .Net connector. What can I do to improve the performance? Edit: One of the 4 queries is as follows: SELECT SUM(TIME_TO_SEC(TIMEDIFF(T1.col2, T1.col1))* T2.col1 / (3600 *1000)) AS TotalTime FROM Table T1 JOIN Table T2 ON T1.col3 = T2.col3 WHERE T1.col4 = 'i' AND T1.col1 >= '2009-12-25 00:00:00' AND T1.col2 <= '2009-12-26 00:00:00'; The other 3 queries are similar, only the where clause changes slightly. This set of 4 queries is fired 5 times. The first 3 times against the join of table T1 and T2, passing in different values for col4. And the next two times against the join of table T3 and T2 passing in different values for col4. These 5 values are the y-axis values for a particular x-axis point. The data returned by all these queries is the same format. so, we tried doing a UNION ALL on all these queries. No substantial difference. One strange thing, however, after indexing the foreign key on the table T1 [while it contained over a lakh records], the queries were using the index, but they had become slower. At times, the queries would take double the time to return the data.

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