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Read Uncommitted, locks, and transactions


Read Uncommitted, locks, and transactions

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Andre Guerreiro
Andre Guerreiro
Ten Centuries
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Group: General Forum Members
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Straightforward question and highly detailed explanations!

Thank you.

Best regards,

Andre Guerreiro Neto

Database Analyst
http://www.softplan.com.br
MCITPx1/MCTSx2/MCSE/MCSA
princa
princa
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Points: 61 Visits: 198
Good question, it's actually the same scenario I am facing right now!!!
But I still have some questions:
#1 - I am using a partitioned view to union two tables, one is original table, one is backup table. So every time I will need to backup original table to backup table, and use partitioned view to union them then will return the same result as i query only original table.
#2 - Then I will delete from original table and then insert all new data. While I am performing this step, eventhough I use with (nolock) on my partitioned view with select statement, it will still be locked until the insert process is done, the same behavior like Truncate.

Am I doing something wrong here?
Evil Kraig F
Evil Kraig F
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Group: General Forum Members
Points: 5703 Visits: 7660
princa (5/7/2012)
Good question, it's actually the same scenario I am facing right now!!!
But I still have some questions:
#1 - I am using a partitioned view to union two tables, one is original table, one is backup table. So every time I will need to backup original table to backup table, and use partitioned view to union them then will return the same result as i query only original table.
#2 - Then I will delete from original table and then insert all new data. While I am performing this step, eventhough I use with (nolock) on my partitioned view with select statement, it will still be locked until the insert process is done, the same behavior like Truncate.

Am I doing something wrong here?


Whats the wait_type on the spid doing the select? I'd have to reconstruct the scenario to confirm. Also, what version is the server?


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kapil_kk
kapil_kk
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Group: General Forum Members
Points: 2425 Visits: 2763
just a wild guess n get +1 for that Smile

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