[postgis-users] postgis support for 7.4 betas
jeff at propertykey.com
Thu Sep 25 14:16:33 PDT 2003
David Blasby wrote:
> Yes - they did some changes between 7.3 and 7.4 in the cost estimate
> It will take me a while to figure out what they did and how it will
> affect the cost estimate code. There maybe other changes as well...
It doesn't seem like there's any postgis-specific stuff in the
genericcostestimate2 function besides settings the index correlation at
the end -- it looks like it was pulled straight from the PostgreSQL
source code. After I decided that was probably the case, I pulled the
genericcostestimate function from 7.4b3, changed the index correlation
value to 0.97 like the old function & it compiled fine for me (set up
like I was compiling for 7.3). I haven't tested it fully yet, but it
seems functional. It seems like a simple fix, but does it sound right?
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