Re: Join runs for > 10 hours and then fills up >1.3TB of disk space

[Richard Huxton <dev(at)archonet(dot)com>]

kevin kempter wrote:
> Hi List;
>
> I have a table with 9,961,914 rows in it (see the describe of 
> bigtab_stats_fact_tmp14 below)
>
> I also have a table with 7,785 rows in it (see the describe of 
> xsegment_dim below)
>
> I'm running the join shown below and it takes > 10 hours and eventually 
> runs out of disk space on a 1.4TB file system

> QUERY PLAN
> --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 
>
> Merge Join  (cost=1757001.74..73569676.49 rows=3191677219 width=118)

Dumb question Kevin, but are you really expecting 3.2 billion rows in 
the result-set? Because that's approaching 400GB of result-set without 
any overheads.

--
  Richard Huxton
  Archonet Ltd