Обсуждение: ts_rank vs ts_rank_cd

Hi I have tested ts_rank and ts_rank_cd for searching in Wikipedia. I would
like to know which of them is better for searching in wikipedia. I have read
something like that ts_rank_cd is better for long sentences, oposite ts_rank
is better for single terms. But generally which of them is better to use ?
Thanks for reply.
Mark

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