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Views in Drag

Ran into a real winner today.  For a completely unexpected reason, several views began timing out and not returning results.

The only thing that worked was recreating the views.

I suspect a possible cause is that the views reference synonyms that in turn reference objects across a linked server.  The linked server options had been modified right before the views stopped working.

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Dedupe based on compound key and timestamp


DECLARE @sourcetab TABLE ( id1 int, id2 int, update_on smalldatetime, val varchar(50) )

DECLARE @targettab TABLE ( id1 int, id2 int, update_on smalldatetime, val varchar(50) )

insert into @sourcetab (id1, id2, update_on, val)
SELECT 10, 1, ‘20120110’, ‘testrec1’
UNION SELECT 10, 1, ‘20120201’, ‘testrec2’
UNION SELECT 5, 2, ‘20120201’, ‘testrec3’
UNION SELECT 5, 1, ‘20120201’, ‘testrec4’
UNION SELECT 5, 1, ‘20120205’, ‘testrec5’
UNION SELECT 12, 18, ‘20120201’, ‘testrec6’
UNION SELECT 12, 18, ‘20120205’, ‘testre7’
UNION SELECT 12, 5, ‘20120201’, ‘testrec8’
UNION SELECT 17, 3, ‘20120201’, ‘testrec9’
UNION SELECT 18, 4, ‘20120201’, ‘testrec10’

insert into @targettab (id1, id2, update_on, val)
SELECT 10, 1, ‘20120101’, ‘testrec01’
UNION SELECT 12, 5, ‘20120101’, ‘testrec02’
UNION SELECT 20, 19, ‘20120101’, ‘testrec03’

–not deduped
SELECT A.id1, A.id2, A.update_on, A.val
FROM @sourcetab A
ORDER BY A.id1, A.id2, A.update_on

–deduped with most current wins
SELECT A.id1, A.id2, A.update_on, A.val
FROM @sourcetab A
WHERE A.update_on = ( SELECT max(A1.update_on)
FROM @sourcetab A1
WHERE A1.id1 = A.id1
AND A1.id2 = A.id2 )

–update with most recent
UPDATE A
SET A.val = B.val
, A.update_on = B.update_on
FROM @targettab A
INNER JOIN @sourcetab B
ON A.id1 = B.id1
AND A.id2 = B.id2
WHERE B.update_on > A.update_on
AND B.update_on = ( SELECT max(B1.update_on)
FROM @sourcetab B1
WHERE B1.id1 = B.id1
AND B1.id2 = B.id2 )

–insert new recs

INSERT INTO @targettab ( id1, id2, update_on, val )
SELECT A.id1, A.id2, A.update_on, A.val
FROM @sourcetab A
WHERE A.update_on = ( SELECT max(A1.update_on)
FROM @sourcetab A1
WHERE A1.id1 = A.id1
AND A1.id2 = A.id2 )
AND NOT EXISTS ( SELECT TOP 1 1
FROM @targettab B
WHERE B.id1 = A.id1
AND B.id2 = A.id2 )

–final result
SELECT A.*
FROM @targettab A
ORDER BY A.id1, A.id2, A.update_on

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Passing parameterized string to OpenQuery

OpenQuery can only accept a static string as an argument for the sql statement to execute over the remote link.

The only way around this is to execute the OpenQuery as a dynamic sql string and concatenate the parameters as part of the “static” string.

The results can then be piped into a temp table or table variable. The trick is that “SELECT INTO” will not work, so the table has to be defined beforehand to match the result set of the dynamic sql and use “INSERT INTO”.

The most obnoxious bit is the crazy nested tick-quotes…

DECLARE @mycodes AS TABLE (
[id] [int] NOT NULL,
[code] [varchar](25) NULL,
[description] [varchar](80) NULL
)

declare @sql nvarchar(4000)
, @myparm varchar(255)

SET @myparm = ‘someval’

SET @sql = ‘select id, code, description from openquery([MYDBLINK],”EXEC mydb.dbo.mystoredproc @myparm = ”” + @localval + ””” )’

print @sql

insert into @codes
EXEC sp_executesql @sql

select * from @codes

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MonoTouch Bare Bones

using System;
using MonoTouch.Foundation;
using MonoTouch.UIKit;
namespace myNameSpace
{
   public class Application
   {
      static void Main(string[] args)
      {
         UIApplication.Main(args, null, “AppController”);
      }
   }
   [Register (“AppController”)]
   public class AppController : UIApplicationDelegate 
   {
      UIWindow window;
      public override bool FinishedLaunching(UIApplication app, NSDictionary options)
      {
         // create the main view controller
         var vc = new MainViewController();
         // create main window and add main view controller as subclass
         window = new UIWindow(UIScreen.MainScreen.Bounds);
         window.AddSubview(vc.View);
         window.MakeKeyAndVisible();
         return( true );
      }
      public override void OnActivated(UIApplication application) 
      {
         //required override on iOS 3.0
      }
   }
   [Register]
   public class MainViewController : UIViewController 
   {
      public override void ViewDidLoad()
      {
         base.ViewDidLoad();
         //custom code can start here…
         Console.WriteLine(“App Loaded”);
      }
   }
}//myNameSpace
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iOS MonoTouch Developement

Will Need:

1. Mac running OSX 10

2. Install latest version of Apple’s Developer Tools / Xcode
     https://developer.apple.com/technologies/tools/

3. Once installed, in Xcode go to “XCode”–>”Preferences”–>”Downloads” and install “Command Line Tools” (will need this if you want to “make” any bindings to additional Objective-C components).

4. Download and install MonoTouch.  This will include: 1) Mono, an open source .NET implementation; 2) MonoDevelop, an open source IDE similar to Visual Studio; and, 3) MonoTouch, the proprietary set of libraries that allow you to compile C# code into iOS apps.

5. Your now ready to do the first tutorials found here:
    http://docs.xamarin.com/ios

To this point you can write code and run it in the simulator.

To actually deploy it to a device you will need a licensed copy of Monotouch and one of the following:

Apple Developer Program ($99 a year) – provision ad-hoc deployment on up to 100 different devices for testing and distribute/sell apps via app store.

https://developer.apple.com/programs/ios/

Apple Enterprise Program ($299 a year) – deploy .ipa bundled apps to corporate owned or corporate employee owned devices.

https://developer.apple.com/programs/ios/enterprise/