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The Perils of Running Database Repair


The Perils of Running Database Repair

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chrisfradenburg
chrisfradenburg
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Paul Randal (6/25/2012)
Be careful though because SQL Agent will only capture the first X bytes of the output (unless that changed in recent versions). You may want to go the route of using the undocumented WITH TABLERESULTS and storing the output in a table for later perusal. See here for an example.


We write the output to a file and that has the entire output. Use whichever works better for you.
timothyawiseman
timothyawiseman
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Fantastic article, thank you.

---
Timothy A Wiseman
SQL Blog: http://timothyawiseman.wordpress.com/
Satish Nagaraja
Satish Nagaraja
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Thanks for this article , all this while in my DBA career was wondering why REPAIR_REBUILD did not work most times on cluster index chain broken.

But observed in one of the client places REPAIR_ALLOW_DATA_LOSS did work for corrupt system tables without data loss but yes backups are best bet's as you said.

Cheers
Satish

Cheer Satish :-)
Paul Randal
Paul Randal
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It entirely depends on which system tables are corrupt, and what the corruption is. Basically, it's a crap-shoot whether it'll work or make things worse because the system tables are quite twitchy when direct physical changes are made to them.

Thanks

Paul Randal
CEO, SQLskills.com: Check out SQLskills online training!
Blog:www.SQLskills.com/blogs/paul Twitter: @PaulRandal
SQL MVP, Microsoft RD, Contributing Editor of TechNet Magazine
Author of DBCC CHECKDB/repair (and other Storage Engine) code of SQL Server 2005
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