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Microsoft® SQL Server 2012 Unleashed by Alex T. Silverstein, Chris Gallelli, Paul T. Bertucci, Ray Rankins

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Indexing

The indexing engine connects to your database and extracts the content from the tables you are full-text indexing. It then sends this stream to COM components called filters. These COM components are run in an out-of-process service called the SQL Full-Text Filter Daemon Launcher Service (FDLauncher.exe). This service, in turn, runs a process called SQL Full-Text Host (FDHost.exe), which manages the indexing process. These filters can understand the content and can extract text data from them. For example, if you store XML or Word documents in your database, these filters can understand this data or binary data and emit words/tokens and properties it finds in there. The filter chosen by default is the text filter if you are using char ...

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