DBCC CHECKTABLE (Transact- SQL) . Table or view names must comply with the rules for identifiers. This decreases the overall execution time. NOINDEX does not affect system tables because the integrity checks are always performed on all system table indexes. To use a repair option, the database must be in single- user mode.

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This list contains all of the known Microsoft Knowledge Base articles, howtos, fixes, hotfixes, webcasts and updates of Microsoft Windows Server 2008 R2 starts with. For the specified table, DBCC CHECKTABLE checks for the following: Index, in-row, LOB, and row-overflow data pages are correctly linked. Indexes are in their correct.

These repairs can cause some data loss. No repair actions are performed. This can include quick repairs, such as repairing missing rows in non- clustered indexes, and more time- consuming repairs, such as rebuilding an index. This argument does not repair errors involving FILESTREAM data. To repair errors, we recommend restoring from a backup. Repair operations do not consider any of the constraints that may exist on or between tables.

If the specified table is involved in one or more constraints, we recommend running DBCC CHECKCONSTRAINTS after a repair operation. If you must use REPAIR, run DBCC CHECKTABLE without a repair option to find the repair level to use.

If you are going to use the REPAIR. All error messages are displayed by default. Specifying or omitting this option has no effect. TABLOCK will cause DBCC CHECKTABLE to run faster on a table under heavy load, but decreases the concurrency available on the table while DBCC CHECKTABLE is running. Designed to provide a small overhead check of the physical consistency of the table, this check can also detect torn pages, and common hardware failures that can compromise data. A full run of DBCC CHECKTABLE may take considerably longer than in earlier versions.

This behavior occurs because of the following reasons: The logical checks are more comprehensive. We still recommend that a full run of DBCC CHECKTABLE be performed periodically. The frequency of these runs depends on factors specific to individual businesses and production environments. For example, DBCC CHECKTABLE detects columns with date and time values that are larger than or less than the acceptable range for the datetime data type; or decimal or approximate- numeric data type columns with scale or precision values that are not valid.

Column- value integrity checks are enabled by default and do not require the DATA. For databases upgraded from earlier versions of SQL Server, you can use DBCC CHECKTABLE WITH DATA. After this, DBCC CHECKDB and DBCC CHECKTABLE check column- value integrity by default. Validation errors reported by this option cannot be fixed by using DBCC repair options. For information about manually correcting these errors, see Knowledge Base article 9. Troubleshooting DBCC error 2. SQL Server 2. 00.

If PHYSICAL. The MAXDOP can exceed the value configured with sp. If MAXDOP exceeds the value configured with Resource Governor, the Database Engine uses the Resource Governor MAXDOP value, described in ALTER WORKLOAD GROUP (Transact- SQL). All semantic rules used with the max degree of parallelism configuration option are applicable when you use the MAXDOP query hint. For more information, see Configure the max degree of parallelism Server Configuration Option.

However, on XML indexes, spatial indexes, and indexed views only physical consistency checks are performed by default. By default, physical consistency checks are performed before the logical consistency checks. If NOINDEX is also specified, only the logical checks are performed. These logical consistency checks cross check the internal index table of the index object with the user table that it is referencing.

To find outlying rows, an internal query is constructed to perform a full intersection of the internal and user tables. Running this query can have a very high effect on performance, and its progress cannot be tracked. Vigilante 8 Game Download Pc more. Therefore, we recommend that you specify WITH EXTENDED. This change greatly reduces the duration of CHECKDB against databases containing these objects.

However, the physical consistency checks of these objects is always completed. Only when EXTENDED. Spatial indexes are not supported. To learn the compatibility level of a database. View or Change the Compatibility Level of a Database. Internal Database Snapshot.

DBCC CHECKTABLE uses an internal database snapshot to provide the transactional consistency that it must have to perform these checks. For more information, see View the Size of the Sparse File of a Database Snapshot (Transact- SQL) and the . This is because, for performance reasons, database snapshots are not available on tempdb. This means that the required transactional consistency cannot be obtained.

When using DBCC CHECKTABLE on a table that stores BLOBs in the file system, DBCC checks link- level consistency between the file system and database. DBCC CHECKTABLE can repair corruption if you specify the REPAIR. To repair FILESTREAM corruption, DBCC will delete any table rows that are missing file system data and will delete any directories and files that do not map to a table row, column, or column value.

Checking Objects in Parallel. By default, DBCC CHECKTABLE performs parallel checking of objects.

The degree of parallelism is automatically determined by the query processor. The maximum degree of parallelism is configured in the same manner as that of parallel queries. To restrict the maximum number of processors available for DBCC checking, use sp. For more information, see Configure the max degree of parallelism Server Configuration Option. For more information, see Trace Flags (Transact- SQL). Note During a DBCC CHECKTABLE operation, the bytes that are stored in a byte- ordered user- defined type column must be equal to the computed serialization of the user- defined type value. If this is not true, the DBCC CHECKTABLE routine will report a consistency error.

If the DBCC command successfully executes, the message indicates a successful completion and the amount of time that the command ran. If the DBCC command stops before completing the check because of an error, the message indicates the command was terminated, a state value, and the amount of time the command ran. The following table lists and describes the state values that can be included in the message. State. Description.

Error number 8. 93. This indicates a metadata corruption that caused the DBCC command to terminate. Error number 8. 96. There was an internal DBCC error. A failure occurred during emergency mode database repair. This indicates a metadata corruption that caused the DBCC command to terminate.

An assert or access violation was detected. An unknown error occurred that terminated the DBCC command.

Error Reporting. A mini- dump file (SQLDUMPnnnn. SQL Server LOG directory whenever DBCC CHECKTABLE detects a corruption error. When the Feature Usage data collection and Error Reporting features are enabled for the instance of SQL Server, the file is automatically forwarded to Microsoft. The collected data is used to improve SQL Server functionality. The file has restricted discretionary access- control lists (DACLs). Access is limited to the SQL Server service account and members of the sysadmin role.

By default, the sysadmin role contains all members of the Windows BUILTIN\Administrators group and the local administrator's group. The DBCC command does not fail if the data collection process fails. Resolving Errors If DBCC CHECKTABLE reports any errors, we recommend restoring the database from the database backup instead of running REPAIR with one of the REPAIR options. If no backup exists, running REPAIR can correct the errors that are reported. The REPAIR option to use is specified at the end of the list of reported errors.

However, that correcting the errors by using the REPAIR. If repairs are rolled back, the database will still contain errors and must be restored from a backup. After you have completed all repairs, back up the database. Result Sets. DBCC CHECKTABLE returns the following result set.

The same result set is returned if you specify only the table name or any of the options. DBCC results for 'Human. Resources. Employee'. If DBCC printed error messages, contact your system administrator.