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Re: [PATCHES] Minimum selectivity estimate for LIKE 'prefix%'

  • From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
  • To: Peter Eisentraut <peter_e(at)gmx(dot)net>
  • Cc: pgsql-hackers(at)postgresql(dot)org
  • Subject: Re: [PATCHES] Minimum selectivity estimate for LIKE 'prefix%'
  • Date: Mon, 31 Mar 2008 10:03:49 -0400
  • Message-id: <27057.1206972229@sss.pgh.pa.us> <text/plain>
Peter Eisentraut <peter_e(at)gmx(dot)net> writes:
> OK, first results with this patch are in: The selectivity estimations are 
> adjusted nicely, but the cost calculation doesn't change at all.  Before:

I've forgotten the context ... what's the whole query and plan again?
And which PG version exactly?

			regards, tom lane
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