Before you request a clustered result set, you must build the text index with the clustering function enabled (see “Enabling Query-By-Example, Summarization, and Clustering”).
The Verity clustering algorithm attempts to group similar rows together, based on the values of the following configuration parameters:
cluster_style
cluster_max
cluster_effort
cluster_order
Use the sp_text_cluster system procedure to have a query use values that are different from the default values of these configuration parameters. (For values and how to set them for a query, see sp_text_cluster.)
