Re: [PERFORM] An "obvious" index not being used

Daniele Varrazzo <piro@develer.com> writes:
> In my problem I had 2 tables: a small one (accounts), a large one (foo). The
> way the query is written doesn't allow the stats from the large table to be
> used at all, unless the records from the small table are fetched. This is
> independent from the stats accuracy.

> What the planner does is to assume an even distribution in the data in the
> joined fields.

Sir, you don't know what you're talking about.

regards, tom lane

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