March 2009
Intermediate to advanced
784 pages
30h 30m
English
book
Microsoft® SQL Server® 2008 Internals
by Paul Randal Kalen Delaney Kimberly Tripp, and Conor Cunningham
Content preview from Microsoft® SQL Server® 2008 InternalsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Primitive System Catalog Consistency Checks
The storage engine in SQL Server 2008 defines three of the system catalogs as being critical to its operations. These tables are
sys.sysallocunits
sys.sysrowsets
sys.sysrscols
In SQL Server 2005, there were two more critical system tables—sys.syshobts and sys.syshobtcolumns—but these have been folded into the sys.sysrowsets and sys.sysrscols tables, respectively. Collectively, these are the equivalent of the old sysindexes, sysobjects, and syscolumns tables. They hold all the base metadata that the storage engine needs to navigate around the table and index structures. DBCC CHECKDB also uses them for this purpose, although indirectly through the metadata subsystem in the Relational Engine.
These system catalogs ...
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