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Plans


Plans

Author
Message
Anipaul
Anipaul
SSCrazy Eights
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Group: General Forum Members
Points: 9975 Visits: 1407
I just googled to see whether this question has any inner (hidden) meaning. As the question was from Steve, I thought it would not be as easy as it is showing?



Steve Jones
Steve Jones
SSC Guru
SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)

Group: Administrators
Points: 152862 Visits: 19455
LOL, I don't always try to make the questions hard. I typically write 5-10 at once, so I balance them out as easy and hard.

Follow me on Twitter: @way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
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Evil Kraig F
Evil Kraig F
SSC-Insane
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Group: General Forum Members
Points: 22023 Visits: 7660
LOL, I should have looked up what re-entrant meant before answering. Oops. :-) That'll learn me.

I wasn't thinking in terms of multiple connections, but the same connection re-entering its own query plan. Oopsies. :-D


- Craig Farrell

Never stop learning, even if it hurts. Ego bruises are practically mandatory as you learn unless you've never risked enough to make a mistake.

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Twitter: @AnyWayDBA
UMG Developer
UMG Developer
SSCarpal Tunnel
SSCarpal Tunnel (4.2K reputation)SSCarpal Tunnel (4.2K reputation)SSCarpal Tunnel (4.2K reputation)SSCarpal Tunnel (4.2K reputation)SSCarpal Tunnel (4.2K reputation)SSCarpal Tunnel (4.2K reputation)SSCarpal Tunnel (4.2K reputation)SSCarpal Tunnel (4.2K reputation)

Group: General Forum Members
Points: 4184 Visits: 2204
Thanks for the question!
Andre Guerreiro
Andre Guerreiro
SSCrazy
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Group: General Forum Members
Points: 2329 Visits: 1515
Thanks for the question.
Now could anyone point to an article explaining what re-entrant means?

Best regards,

Best regards,

Andre Guerreiro Neto

Database Analyst
http://www.softplan.com.br
MCITPx1/MCTSx2/MCSE/MCSA
Steve Jones
Steve Jones
SSC Guru
SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)SSC Guru (152K reputation)

Group: Administrators
Points: 152862 Visits: 19455
http://en.wikipedia.org/wiki/Reentrant_%28computing%29

It means the same section of code can be executing from one user (or process) and a second user can then use that same code again and start executing it at that same time. It promotes some scalability, since you need less resources for that section of code.

If it's not re-entrant, then a second copy of the code must be created and resources assigned for the second user to execute it.

Follow me on Twitter: @way0utwest
Forum Etiquette: How to post data/code on a forum to get the best help
My Blog: www.voiceofthedba.com
Paul White
Paul White
SSC-Dedicated
SSC-Dedicated (37K reputation)SSC-Dedicated (37K reputation)SSC-Dedicated (37K reputation)SSC-Dedicated (37K reputation)SSC-Dedicated (37K reputation)SSC-Dedicated (37K reputation)SSC-Dedicated (37K reputation)SSC-Dedicated (37K reputation)

Group: General Forum Members
Points: 37278 Visits: 11361
Hesitated over this one. Compiled plans are re-entrant, but the execution contexts derived from them are not. By 'query plan' I guessed the author of the question was referring to the former, and was rewarded with a point.



Paul White
SQLPerformance.com
SQLblog.com
@SQL_Kiwi
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