Re: How does Index Scan get used
От | Oliver Elphick |
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Тема | Re: How does Index Scan get used |
Дата | |
Msg-id | 1014406374.13241.2406.camel@linda обсуждение исходный текст |
Ответ на | Re: How does Index Scan get used (Oliver Elphick <olly@lfix.co.uk>) |
Ответы |
Re: How does Index Scan get used
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Список | 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 GPG: 1024D/3E1D0C1C: CA12 09E0 E8D5 8870 5839 932A 614D 4C34 3E1D 0C1C "The LORD bless thee, and keep thee; The LORD make his face shine upon thee, and be gracious unto thee; The LORD lift up his countenance upon thee, and give thee peace." Numbers 6:24-26
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