Re: select max(column) from parent table very slow

Tom Lane wrote:
> "Joshua D. Drake"  writes:
>> Sriram Dandapani wrote:
>>> Parent table has a column say column1 which is indexed (parent table and
>>> all child tables are indexed on that column)
> 
>> In older versions of postgresql that would scan the whole table. In 8.1 
>> and above it doesn't. However, I am guess that since this is a 
>> partitioned table the planner isn't smart enough to just perform the 
>> query on each child and a max on the set that is returned.
> 
> It is not.  Feel free to submit a patch for planagg.c ...

I think my patch to pgbench may have set your expectations of me a bit 
high ;)...

Joshua D. Drake


> 
> 			regards, tom lane
> 


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