{"id":829,"date":"2006-09-16T20:48:00","date_gmt":"2006-09-16T20:48:00","guid":{"rendered":"\/blogs\/bobb\/post\/Who-uses-MARS-ADONET-vNext-thats-who.aspx"},"modified":"2013-01-04T00:00:09","modified_gmt":"2013-01-04T08:00:09","slug":"who-uses-mars-ado-net-vnext-thats-who","status":"publish","type":"post","link":"https:\/\/www.sqlskills.com\/blogs\/bobb\/who-uses-mars-ado-net-vnext-thats-who\/","title":{"rendered":"Who uses MARS? ADO.NET vNext, that&#8217;s who."},"content":{"rendered":"<p>\nThere was a newsgroup discussion recently about the intricacies of Multiple Active Resultsets in SQL Server 2005, and one of the questions that came up was &quot;Who actually needs\/uses MARS anyway&quot;? I&#39;ve been taking a much closer look at ADO.NET vNext lately, one reason being that I&#39;m doing a talk on it at <a href=\"http:\/\/www.microsoft.com\/hk\/technet\/teched2006\/default.aspx\">TechEd Hong Kong <\/a>the week after next. Guess what? Both the supplied ObjectServices and LINQ for Entities samples have &quot;multipleactiveresultsets=true&quot; in their connection strings. Why? Without taking MARS out and seeing where the samples fail (I&#39;ll get around to it&#8230;), I&#39;d bet they use both the &quot;multiple resultsets on the same connection&quot; and &quot;issue an UPDATE statement while reading a rowset on the same connection&quot; patterns. That&#39;s what MARS is supposed to address (the very&nbsp;precise ODBC error message for this is &quot;Statement in Use&quot;).\n<\/p>\n<p>\nBTW, MARS has some interesting effects on transactions and session settings, too. I&#39;ll be doing a talk on this at <a href=\"http:\/\/www.microsoft.com\">TechEd Europe in Barcelona in Novemeber<\/a>. Don&#39;t forget to stop by and say hi if you&#39;re at either of these excellent events.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>There was a newsgroup discussion recently about the intricacies of Multiple Active Resultsets in SQL Server 2005, and one of the questions that came up was &quot;Who actually needs\/uses MARS anyway&quot;? I&#39;ve been taking a much closer look at ADO.NET vNext lately, one reason being that I&#39;m doing a talk on it at TechEd Hong [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-829","post","type-post","status-publish","format-standard","hentry","category-data-access"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.9.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Who uses MARS? ADO.NET vNext, that&#039;s who. - Bob Beauchemin<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sqlskills.com\/blogs\/bobb\/who-uses-mars-ado-net-vnext-thats-who\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Who uses MARS? ADO.NET vNext, that&#039;s who. - Bob Beauchemin\" \/>\n<meta property=\"og:description\" content=\"There was a newsgroup discussion recently about the intricacies of Multiple Active Resultsets in SQL Server 2005, and one of the questions that came up was &quot;Who actually needs\/uses MARS anyway&quot;? 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