Parameter sniffing

  • Very interesting question, thanks.

    Need an answer? No, you need a question
    My blog at https://sqlkover.com.
    MCSE Business Intelligence - Microsoft Data Platform MVP

  • very nice question

  • Great question, learned something today.

    Got it right but didn't know that by recompiling the table only the statement referencing that table inside the SP would be recompiled!!

    I recently watched one of SQLSentry's videos on query tuning in which they stated that if a table was recompiled all "objects" that depend on a table would be recompiled so I figured the whole SP would recompile. My thought was that the entire execution plan would be thrown away and recreated.

    Thanks!

    ---------------
    Mel. 😎

  • Posting a bit late to the party, as Thursday was a hectic day. Thanks for this very interesting question. I figured there was a command option to force the defaults to be applied to existing records. Thanks to your question, I know what it is. Questions like this help me learn stuff ahead of when I need them, and that's what keeps me coming back to QOTD.

    [font="Verdana"]Please don't go. The drones need you. They look up to you.[/font]
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  • Two-pointer... Got it right only because I ran into this about three weeks ago.

    Thanks, Mikael!

  • Thank you!

    Best Regards,

    Chris Büttner

  • Indeed a great one!!

    ---------------------------------------------------
    "Thare are only 10 types of people in the world:
    Those who understand binary, and those who don't."

  • Good Question.

    Jason...AKA CirqueDeSQLeil
    _______________________________________________
    I have given a name to my pain...MCM SQL Server, MVP
    SQL RNNR
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  • I cannt get that result...

    Manik
    You cannot get to the top by sitting on your bottom.

  • end of sequence for good answers !

    really nice question thanks

  • Getting this error:

    Msg 208, Level 16, State 1, Procedure GetIt, Line 7

    Invalid object name 'T'.

    Msg 15165, Level 16, State 1, Procedure sp_recompile, Line 19

    Could not find object 'T' or you do not have permission.

    Msg 208, Level 16, State 1, Procedure GetIt, Line 7

    Invalid object name 'T'.

    Thanks.

  • SQL-DBA-01 (12/26/2014)


    Getting this error:

    Msg 208, Level 16, State 1, Procedure GetIt, Line 7

    Invalid object name 'T'.

    Msg 15165, Level 16, State 1, Procedure sp_recompile, Line 19

    Could not find object 'T' or you do not have permission.

    Msg 208, Level 16, State 1, Procedure GetIt, Line 7

    Invalid object name 'T'.

    If you blindly copy, paste, and run the code - then yes, you will get that error. The code references a table named "T" that you probably didn't create.

    But for answering this QotD, there is no need to run the code. Just reading the question and the code should suffice.


    Hugo Kornelis, SQL Server/Data Platform MVP (2006-2016)
    Visit my SQL Server blog: https://sqlserverfast.com/blog/
    SQL Server Execution Plan Reference: https://sqlserverfast.com/epr/

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