No, the start_incremental will be sufficient.
keep in mind that the first time you do an incremental population a full population will be done. Also keep in mind that you need a timestamp column on your table otherwise a full population will always be done.
Also keep in mind that change tracking with update index in background will probably offer the best performance for you as with it only the new or modified rows are indexed. With both a full and incremental population every row is extracted from the tables you are FTI'ing.

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Hilary Cotter
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Hi,
I'd like to implement incremental population for a given table.
I don't understand if I need to use both "sp_fulltext_catalog" and "sp_fulltext_table" to accomplish this task. BOL is a bit nebulous in their explanation.
"sp_fulltext_catalog" has an @action value of "start_incremental"; "sp_fulltext_table" has an @action value of "start_change_tracking" and "start_background_updateindex"
Do I need to use all of these in a certain sequence?
Thanks.
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Mark Holahan