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sql2008-- index operation

I read one of teh document for index operation in sql server, I don't understands below point by Mcsft, does it means here when I run index operation with begin or end transaction, thsi is call explicit transaction ?

4.      Do not run the online index operation in an explicit transaction. The log will not be truncated until the explicit transaction ends.

How about if I run it  below?

exec sp_MSforeachtable
  'ALTER INDEX ALL ON ? REBUILD WITH (SORT_IN_TEMPDB = ON)'
 -- force a checkpoint to reduce transaction log space used by the rebuild
 checkpoint
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motioneye
Asked:
motioneye
2 Solutions
 
Aaron ShiloChief Database ArchitectCommented:
hi

index operations or any OTHER type of operation can be done within an EXPLICIT TRANSACTION.


an explicit transaction is when you do any sql operation within :

Begin transaction
sql...
sql...
sql...
Commit/Rollback transaction.

readup on managing transaction within sql server : http://technet.microsoft.com/en-us/library/ms188929.aspx

Aaron.
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Surendra NathTechnology LeadCommented:
You can execute the given statement within or without explicit transaction.
But putting it in a explicit transaction will reduce the performance of the index rebuild operation.
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