THIS TOPIC APPLIES TO: SQL Server (starting with 2016)Azure SQL DatabaseAzure SQL Data Warehouse Parallel Data Warehouse
This topic explains how to back up and restore full-text indexes created in SQL Server. In SQL Server, the full-text catalog is a logical concept and does not reside in a filegroup. Therefore, to back up a full-text catalog in SQL Server, you must identify every filegroup that contains a full-text index that belongs to the catalog. Then you must back up those filegroups, one by one.
It is possible to import full-text catalogs when upgrading a SQL Server 2005 database. Each imported full-text catalog is a database file in its own filegroup. To back up an imported catalog, simply back up its filegroup. For more information, see Backing Up and Restoring Full-Text Catalogs, in SQL Server 2005 Books Online.
Backing Up the Full-Text Indexes of a Full-Text Catalog
Finding the Full-Text Indexes of a Full-Text Catalog
USE AdventureWorks2012; GO DECLARE @TableID int; SET @TableID = (SELECT OBJECT_ID('AdventureWorks2012.Production.Product')); SELECT object_name(@TableID), i.is_enabled, i.change_tracking_state, i.has_crawl_completed, i.crawl_type, c.name as fulltext_catalog_name FROM sys.fulltext_indexes i, sys.fulltext_catalogs c WHERE i.fulltext_catalog_id = c.fulltext_catalog_id; GO
Finding the Filegroup or File That Contains a Full-Text Index
When a full-text index is created, it is placed in one of the following locations:
A user-specified filegroup.
The same filegroup as base table or view, for a nonpartitioned table.
The primary filegroup, for a partitioned table.
To find the filegroup of full-text index on a table or view, use the following query, where object_name is the name of the table or view:
SELECT name FROM sys.filegroups f, sys.fulltext_indexes i WHERE f.data_space_id = i.data_space_id and i.object_id = object_id('object_name'); GO
Backing Up the Filegroups That Contain Full-Text Indexes
After you find the filegroups that contain the indexes of a full-text catalog, you need back up each of the filegroups. During the backup process, full-text catalogs may not be dropped or added.
The first backup of a filegroup must be a full file backup. After you have created a full file backup for a filegroup, you could back up only the changes in a filegroup by creating a series of one or more differential file backups that are based on the full file backup.
To back up files and filegroups
Restoring a Full-Text Index
Restoring a backed-up filegroup restores the full-text index files, as well as the other files in the filegroup. By default, the filegroup is restored to the disk location on which the filegroup was backed up.
If a full-text indexed table was online and a population was running when the backup was created, the population is resumed after the restore.
To restore a filegroup