{"id":26291,"date":"2022-12-16T21:01:04","date_gmt":"2022-12-16T15:31:04","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-taking-lot-of-time-to-read-from-sql-server-using-c\/"},"modified":"2022-12-16T21:01:04","modified_gmt":"2022-12-16T15:31:04","slug":"solved-taking-lot-of-time-to-read-from-sql-server-using-c","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-taking-lot-of-time-to-read-from-sql-server-using-c\/","title":{"rendered":"[Solved] Taking lot of time to read from SQL Server using c#"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-17987988\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"17987988\" data-parentid=\"17986524\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Something like this might work. I&#8217;m not sure on the efficiency yet &#8211; it may depend on the amount of hits that you&#8217;re looking for:<\/p>\n<pre><code>create type HitBlocks as table (\n    HitIndex int not null\n)\ngo\ncreate procedure FindMaxCover\n    @Hits HitBlocks readonly\nas\n    ;With DecomposedBlocks as (\n        select (HitIndex\/8)+1 as ByteIndex,POWER(2,(HitIndex%8)) as BitMask\n        from @Hits\n    ), Coverage as (\n        select\n            t.TraceName,SUM(CASE WHEN SUBSTRING(t.BlockVector,db.ByteIndex,1) &amp; BitMask != 0 THEN 1 ELSE 0 END) as Coverage\n        from\n            Trace t\n                cross join\n            DecomposedBlocks db\n        group by\n            t.TraceName\n    ), Ranked as (\n        select *,RANK() OVER (ORDER BY Coverage desc) as rk\n        from Coverage\n    )\n    select\n        t.TraceName,\n        t.BlockVector,\n        r.Coverage\n    from\n        Ranked r\n            inner join\n        Trace t\n            on\n                r.TraceName = t.TraceName\n    where rk = 1\n<\/code><\/pre>\n<p>At the moment, this will return multiple rows if there are multiple results with the same coverage level. You may also have to adjust for a) Some off-by-one errors between my expectations and yours, and b) There may be some endianness issues in computing the correct <code>BitMask<\/code> values.<\/p>\n<p>From your code, you would populate a <code>DataTable<\/code> with the values you&#8217;re currently storing in <code>hit_block_index<\/code> and pass that across as the <code>@Hits<\/code> <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/msdn.microsoft.com\/en-us\/library\/bb675163.aspx\">parameter<\/a>.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Taking lot of time to read from SQL Server using c# <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Something like this might work. I&#8217;m not sure on the efficiency yet &#8211; it may depend on the amount of hits that you&#8217;re looking for: create type HitBlocks as table ( HitIndex int not null ) go create procedure FindMaxCover @Hits HitBlocks readonly as ;With DecomposedBlocks as ( select (HitIndex\/8)+1 as ByteIndex,POWER(2,(HitIndex%8)) as BitMask &#8230; <a title=\"[Solved] Taking lot of time to read from SQL Server using c#\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-taking-lot-of-time-to-read-from-sql-server-using-c\/\" aria-label=\"More on [Solved] Taking lot of time to read from SQL Server using c#\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[324,341,501,3485],"class_list":["post-26291","post","type-post","status-publish","format-standard","hentry","category-solved","tag-c","tag-sql","tag-sql-server-2008","tag-sql-server-2012"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Taking lot of time to read from SQL Server using c# - JassWeb<\/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:\/\/jassweb.com\/solved\/solved-taking-lot-of-time-to-read-from-sql-server-using-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Taking lot of time to read from SQL Server using c# - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Something like this might work. I&#8217;m not sure on the efficiency yet &#8211; it may depend on the amount of hits that you&#8217;re looking for: create type HitBlocks as table ( HitIndex int not null ) go create procedure FindMaxCover @Hits HitBlocks readonly as ;With DecomposedBlocks as ( select (HitIndex\/8)+1 as ByteIndex,POWER(2,(HitIndex%8)) as BitMask ... 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I&#8217;m not sure on the efficiency yet &#8211; it may depend on the amount of hits that you&#8217;re looking for: create type HitBlocks as table ( HitIndex int not null ) go create procedure FindMaxCover @Hits HitBlocks readonly as ;With DecomposedBlocks as ( select (HitIndex\/8)+1 as ByteIndex,POWER(2,(HitIndex%8)) as BitMask ... 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