Re: parameter hints to the optimizer - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: parameter hints to the optimizer
Date
Msg-id 200408070141.i771fQp05906@candle.pha.pa.us
Whole thread Raw
In response to Re: parameter hints to the optimizer  (Oliver Jowett <oliver@opencloud.com>)
Responses Re: parameter hints to the optimizer  (Oliver Jowett <oliver@opencloud.com>)
List pgsql-hackers
Oliver Jowett wrote:
> Merlin Moncure wrote:
> 
> > Another way to deal with the problem is to defer plan generation until
> > the first plan execution and use the parameters from that execution.
> 
> When talking the V3 protocol, 7.5 defers plan generation for the unnamed 
> statement until parameters are received in the Bind message (which is 
> essentially the same as what you describe). There was some discussion at 
> the time about making it more flexible so you could apply it to arbitary 
> statements, but that needed a protocol change so it didn't happen.

What do you mean about arbitrary statements?  Non-prepared ones, or
non-unnamed ones?

I am trying to figure out what TODO item needs to be added.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
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