Re: Improving planning of outer joins - Mailing list pgsql-hackers

From Christopher Kings-Lynne
Subject Re: Improving planning of outer joins
Date
Msg-id 43A2244C.9020801@familyhealth.com.au
Whole thread Raw
In response to Improving planning of outer joins  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
> I'm not sure whether we'd need any additional planner knobs to control
> this.  I think that the existing join_collapse_limit GUC variable should
> continue to exist, but its effect on left/right joins will be the same as
> for inner joins.  If anyone wants to force join order for outer joins more
> than for inner joins, we'd need some other control setting, but I don't
> currently see why that would be very useful.
> 
> Does this seem like a reasonable agenda, or am I thinking too small?

Oh, and if you wanted to go bigger - the next planning issue people seem 
to have is with our union planning...

Chris



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