From: | Hans-Jürgen Schönig <postgres(at)cybertec(dot)at> |
---|---|
To: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
Cc: | Keith Bottner <kbottner(at)comcast(dot)net>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: planner, how difficult to ... |
Date: | 2004-01-05 18:53:47 |
Message-ID: | 3FF9B2BB.9020802@cybertec.at |
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Lists: | pgsql-hackers |
Peter Eisentraut wrote:
>Keith Bottner wrote:
>
>
>>How integrated is the planner into the database? Put another way, how
>>hard would it be to separate the planner from the core database in
>>such a way that it could be easily replaced either during compilation
>>or even better with a runtime setting?
>>
>>
>
>The planner is configurable at run time in many ways. But maybe you
>want to start by explaining your problem instead of presuming a
>solution.
>
>
you can already "change" the planner.
just use GEQO instead of exhaustive searching,
why would you want to change the existing planner?
implementing a rule based planner like the one Oracle had is not a good
idea ;).
regards,
Hans
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