Re: How does Index Scan get used - Mailing list pgsql-sql

On Fri, 2002-02-22 at 18:08, Oliver Elphick wrote:
> PostgreSQL thinks there are only 10 rows in the table.  Therefore it
> will not choose an index scan because for so few rows it is bound to be
> more expensive than a sequential scan.

But then I saw Tom's mail saying that it does use the index.  How is
that?  Surely these few values would all be brought in in one single
disk read?

-- 
Oliver Elphick                                Oliver.Elphick@lfix.co.uk
Isle of Wight                              http://www.lfix.co.uk/oliver
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