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Discuss content posted by Nakul Vachhrajani
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Fun with Transactions - Part III
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Fun with Transactions - Part III
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Nakul Vachhrajani
Nakul Vachhrajani
Posted Monday, September 20, 2010 10:26 PM
Ten Centuries
Group: General Forum Members
Last Login: Thursday, May 16, 2013 9:52 AM
Points: 1,277,
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Comments posted to this topic are about the item
Fun with Transactions - Part III
Thanks & Regards,
Nakul Vachhrajani.
http://beyondrelational.com/modules/2/blogs/77/nakuls-blog.aspx
Be courteous. Drive responsibly.
Follow me on
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@nakulv_sql
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Post #989902
UMG Developer
UMG Developer
Posted Monday, September 20, 2010 10:27 PM
SSCrazy
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Thanks for the question, it is good to review the basics of transactions!
Post #989903
ziangij
ziangij
Posted Monday, September 20, 2010 11:33 PM
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thanks for this question... i was wondering if you could you provide a question or a query that involves both
ROLLBACK WORK & ROLLBACK TRAN
Post #989946
Hugo Kornelis
Hugo Kornelis
Posted Tuesday, September 21, 2010 12:43 AM
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ziangij (9/20/2010)
thanks for this question... i was wondering if you could you provide a question or a query that involves both
ROLLBACK WORK & ROLLBACK TRAN
ROLLBACK WORK (or simply ROLLBACK, as the WORK keyword is optional) is completely equivalent to ROLLBACK TRAN without transaction name.
Hugo Kornelis, SQL Server MVP
Visit my SQL Server blog:
http://sqlblog.com/blogs/hugo_kornelis
Post #989985
Nakul Vachhrajani
Nakul Vachhrajani
Posted Tuesday, September 21, 2010 12:51 AM
Ten Centuries
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ziangij (9/20/2010)
thanks for this question... i was wondering if you could you provide a question or a query that involves both
ROLLBACK WORK & ROLLBACK TRAN
When you simply issue a ROLLBACK, it is equivalent to issuing a ROLLBACK WORK.
ROLLBACK TRAN is a special case, as it can only work with user-defined transactions.
Thanks & Regards,
Nakul Vachhrajani.
http://beyondrelational.com/modules/2/blogs/77/nakuls-blog.aspx
Be courteous. Drive responsibly.
Follow me on
Twitter:
@nakulv_sql
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Post #989989
jts_2003
jts_2003
Posted Tuesday, September 21, 2010 1:54 AM
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Thanks for this. I wouldn't have realised that ROLLBACK would roll back a comitted transaction - doesn't this have ACID implications?
Post #990024
Hugo Kornelis
Hugo Kornelis
Posted Tuesday, September 21, 2010 2:04 AM
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jts_2003 (9/21/2010)
Thanks for this. I wouldn't have realised that ROLLBACK would roll back a comitted transaction - doesn't this have ACID implications?
It would be far worse if the inner transaction were not rolled back. The inner transaction is included in the outer transaction, so a ROLLBACK of the outer transaction
should
roll back everything that has been done by that transaction - including the nested transactions.
See also the forum discussions that followed the previous two questions in this series.
Hugo Kornelis, SQL Server MVP
Visit my SQL Server blog:
http://sqlblog.com/blogs/hugo_kornelis
Post #990029
Koen Verbeeck
Koen Verbeeck
Posted Tuesday, September 21, 2010 4:40 AM
SSCrazy Eights
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Great question!
How to post forum questions.
Need an answer? No, you need a question.
What’s the deal with Excel & SSIS?
Member of
LinkedIn
. My blog at
LessThanDot
.
MCSA SQL Server 2012 - MCSE Business Intelligence
Post #990110
murray-906152
murray-906152
Posted Tuesday, September 21, 2010 4:42 AM
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In regards to SSChasing Mays concerns about committed transactions being rolled out, 'Committing inner transactions is ignored by the SQL Server Database Engine' (http://msdn.microsoft.com/en-us/library/ms189336.aspx).
Real committed transactions can't be rolled out ('A transaction cannot be rolled back after a COMMIT TRANSACTION statement is executed.' (http://msdn.microsoft.com/en-us/library/ms181299.aspx)).
Perhaps the related QotD answer explanation element ('... (including those inner transactions that have been committed)') could have been better worded.
Post #990112
sjimmo
sjimmo
Posted Tuesday, September 21, 2010 5:59 AM
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Good question - and a great way to review the basics.
Steve Jimmo
Sr DBA
“If we ever forget that we are One Nation Under God, then we will be a Nation gone under." - Ronald Reagan
Post #990161
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