Alter Index

REORGANIZE

Specifies the index leaf level will be reorganized. This clause is equivalent to DBCC INDEXDEFRAG. ALTER INDEX REORGANIZE statement is always performed online. This means long-term blocking table locks are not held and queries or updates to the underlying table can continue during the ALTER INDEX REORGANIZE transaction. REORGANIZE cannot be specified for a disabled index or an index with ALLOW_PAGE_LOCKS set to OFF.

WITH ( LOB_COMPACTION = { ON | OFF } )

Specifies that all pages that contain large object (LOB) data are compacted. The LOB data types are image, text, ntext, varchar(max), nvarchar(max), varbinary(max), and xml. Compacting this data can improve disk space use. The default is ON.

ON

All pages that contain large object data are compacted.

Reorganizing a specified clustered index compacts all LOB columns that are contained in the clustered index. Reorganizing a nonclustered index compacts all LOB columns that are nonkey (included) columns in the index. For more information, see Creating Indexes with Included Columns.

When ALL is specified, all indexes that are associated with the specified table or view are reorganized, and all LOB columns that are associated with the clustered index, underlying table, or nonclustered index with included columns are compacted.

OFF

Pages that contain large object data are not compacted.

OFF has no affect on a heap.

The LOB_COMPACTION clause is ignored if LOB columns are not present.

sp_updatestats

sp_updatestats effectively executes UPDATE STATISTICS, by specifying the ALL keyword, against all user-defined and internal tables in the database. sp_updatestats displays messages that indicate its progress. When the update is completed, it reports that statistics have been updated for all tables. Statistics on disabled nonclustered indexes are also updated by sp_updatestats. sp_updatestats ignores tables with a disabled clustered index.

In SQL Server 2005, sp_updatestats updates only those statistics that require updating based on the rowmodctr information in the sys.sysindexes compatibility view; therefore, preventing unnecessary updates of unchanged items.

For databases with a compatibility level below 90, executing sp_updatestats resets the automatic UPDATE STATISTICS setting for all indexes and statistics on every table in the current database. For more information, see sp_autostats (Transact-SQL). For databases with a compatibility level of 90 or higher, sp_updatestats preserves the automatic UPDATE STATISTICS setting for any particular index or statistics.

Alter index on SQL Server 2005 Standard Edition Errors

Online index operations can only be performed in Enterprise edition of SQL Server.