GiST indices and statistical approximations - Mailing list pgsql-general

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Hi, I was reading the Wikipedia entry on GiST (http://
en.wikipedia.org/wiki/GiST) and it mentions

"""
Although originally designed for answering Boolean selection queries,
GiST can also support nearest-neighbor search, and various forms of
statistical approximation over large data sets.
"""

Could anybody provide pointers to papers or online pages that discuss
the use of GiST indexes for statistical approximations?

Thanks,

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Rajarshi Guha  <rguha@indiana.edu>
GPG Fingerprint: D070 5427 CC5B 7938 929C  DD13 66A1 922C 51E7 9E84
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A memorandum is written not to inform the reader,
but to protect the writer.
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