Re: 9.3 Pre-proposal: Range Merge Join

On Mon, Apr 16, 2012 at 9:12 PM, Jeff Davis <pgsql@j-davis.com> wrote:

> That had occurred to me, but I was hesitant to only use temp indexes. It
> still doesn't really offer a good solution when both sides of the join
> are relatively large (because of random I/O). Also the build speed of
> the index would be more important than it is now.

The thing I like most about temp indexes is that they needn't be temporary.

I'd like to see something along the lines of demand-created optional
indexes, that we reclaim space/maintenance overhead on according to
some cache management scheme. More space you have, the more of the
important ones hang around. The rough same idea applies to
materialised views.

-- 
 Simon Riggs                   http://www.2ndQuadrant.com/
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