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sp_fulltext_service (Transact-SQL)

Changes the server properties of full-text search for SQL Server.

Topic link icon Transact-SQL Syntax Conventions

sp_fulltext_service [ [@action=] 'action' 
     [ , [ @value= ] value ] ]

[ @action=] 'action'

Is the property to be changed or reset. action is nvarchar(100), with no default. For a list of action properties, their descriptions, and the values that can be set, see the table under the value argument. This argument returns the following properties: data type, current running value, minimum or maximum value, and deprecation status, if applicable.

[ @value=] value

Is the value of the specified property. value is sql_variant, with a default value of NULL. If @value is null, sp_fulltext_service returns the current setting. This table lists action properties, their descriptions, and the values that can be set.

Note Note

The following actions will be removed in a future release of SQL Server: clean_up, connect_timeout, data_timeout, and resource_usage. Avoid using these actions in new development work, and plan to modify applications that currently use any of them.

Action

Data type

Description

clean_up

int

Supported for backward compatibility only. The value is always 0.

connect_timeout

int

Supported for backward compatibility only. The value is always 0.

data_timeout

int

Supported for backward compatibility only. The value is always 0.

load_os_resources

int

Indicates whether operating system word breakers, stemmers, and filters are registered and used with this instance of SQL Server. One of:

0 = Use only filters and word breakers specific to this instance of SQL Server.

1 = Load operating system filters and word breakers.

By default, this property is disabled to prevent inadvertent behavior changes by updates made to the operating system. Enabling use of operating system resources provides access to resources for languages and document types registered with Microsoft Indexing Service that do not have an instance-specific resource installed. If you enable the loading of operating system resources, ensure that the operating system resources are trusted signed binaries; otherwise, they cannot be loaded when verify_signature (see below) is set to 1.

master_merge_dop

int

Specifies the number of threads to be used by the master merge process. This value should not exceed the number of available CPUs or CPU cores.

When this argument is not specified, the service uses the lesser of 4, or the number of available CPUs or CPU cores.

pause_indexing

int

Specifies whether full-text indexing should be paused, if it is currently running, or resumed, if it is currently paused.

0 = Resumes full-text indexing activities for the server instance.

1 = Pauses full-text indexing activities for the server instance.

resource_usage

int

Has no function in SQL Server 2008 and later versions, and is ignored.

update_languages

NULL

Updates the list of languages and filters that are registered with full-text search. The languages are specified when configuring indexing and in full-text queries. Filters are used by the filter daemon host to extract textual information from corresponding file formats such as .docx stored in data types, such as varbinary, varbinary(max), image, or xml, for full-text indexing.

For more information, see View or Change Registered Filters and Word Breakers.

upgrade_option

int

Controls how full-text indexes are migrated when upgrading a database from SQL Server 2005 to SQL Server 2008 or later version. This property applies to upgrading by attaching a database, restoring a database backup, restoring a file backup, or copying the database by using the Copy Database Wizard. 

One of:

0 = Full-text catalogs are rebuilt using the new and enhanced word breakers. Rebuilding indexes can take awhile, and a significant amount of CPU and memory might be required after the upgrade.

1 = Full-text catalogs are reset. SQL Server 2005 full-text catalog files are removed, but the metadata for full-text catalogs and full-text indexes is retained. After being upgraded, all full-text indexes are disabled for change tracking and crawls are not started automatically. The catalog will remain empty until you manually issue a full population, after the upgrade completes.

2 = Full-text catalogs are imported. Typically, import is significantly faster than rebuild. For example, when using only one CPU, import runs about 10 times faster than rebuild. However, an imported full-text catalog does not use the new and enhanced word breakers introduced in SQL Server 2008, so you might want to rebuild your full-text catalogs eventually.

Note Note

Rebuild can run in multi-threaded mode, and if more than 10 CPUs are available, rebuild might run faster than import if you allow rebuild to use all of the CPUs.

If a full-text catalog is not available, the associated full-text indexes are rebuilt. This option is available for only SQL Server 2005 databases.

For information about choosing a full-text upgrade option, see full-Upgrade Full-Text Search from SQL Server 2005.

Note Note

To set this property in SQL Server Management Studio, use the Full-Text Upgrade Option property. For more information, see Manage and Monitor Full-Text Search for a Server Instance.

verify_signature

int

Indicates whether only signed binaries are loaded by the Full-Text Engine. By default, only trusted, signed binaries are loaded.

1 = Verify that only trusted, signed binaries are loaded (default).

0 = Do not verify whether binaries are signed.

0 (success) or 1 (failure)

Only members of the serveradmin fixed server role or the system administrator can execute sp_fulltext_service.

A. Updating the list of registered languages

The following example updates the list of languages registered with full-text search.

EXEC sp_fulltext_service 'update_languages';
GO

B. Changing the full-text upgrade option to reset full-text catalogs

The following example changes the full-text upgrade option to reset full-text catalogs. This removes them completely. This example specifies the optional @action and @value keywords.

EXEC sp_fulltext_service @action='upgrade_option', @value=1;
GO
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