Hi!

        I should say that this error is a non-deterministic one. It happened 
once/twenty...

-------------------------------explain info---------------------------------
spid=> explain insert into warehouse_tmp (uri, expression, n, relevance, spid_measure, 
size, title, sample)
spid->    select d.uri, dn.expression, n.n, dn.relevance, d.spid_measure, d.size, 
d.title, dn.sample
spid->    from document as d
spid->         inner join (document_n_gram as dn
spid(>                     inner join n_gram as n
spid(>                     on (dn.expression = n.expression))
spid->         on (d.uri = dn.uri)
spid->    order by dn.expression asc, n.n asc ;
NOTICE:  QUERY PLAN:

Subquery Scan *SELECT*  (cost=3895109.07..3895109.07 rows=1009271 width=886)
  ->  Sort  (cost=3895109.07..3895109.07 rows=1009271 width=886)
        ->  Hash Join  (cost=1155071.81..2115045.12 rows=1009271 width=886)
              ->  Merge Join  (cost=1154294.92..1170599.85 rows=1009271 width=588)
                    ->  Sort  (cost=1001390.67..1001390.67 rows=1009271 width=439)
                          ->  Seq Scan on document_n_gram dn  (cost=0.00..49251.71 
rows=1009271 width=439)
                    ->  Sort  (cost=152904.25..152904.25 rows=466345 width=149)
                          ->  Seq Scan on n_gram n  (cost=0.00..12795.45 rows=466345 
width=149)
              ->  Hash  (cost=767.71..767.71 rows=3671 width=298)
                    ->  Seq Scan on document d  (cost=0.00..767.71 rows=3671 width=298)

EXPLAIN
spid=> 
----------------------------------------------------------------------------

        If you need more info, just ask. I'll be glad to contribute to a so 
interesting project! :-)

-- 
     o__                Bem haja,
    _.>/ _                      NunoACHenriques
   (_) \(_)                     ~~~~~~~~~~~~~~~
                                http://students.fct.unl.pt/users/nuno/

On Sun, 9 Jun 2002, Tom Lane wrote:

>NunoACHenriques <[EMAIL PROTECTED]> writes:
>> Jun  2 06:29:37 srv31 postgres[2986]: [57279] ERROR:  tuplesort: unexpected end of 
>data
>
>Hmm.  This is an internal consistency check in the sort code.  Perhaps
>you've found a bug, but there's not enough info here to do much.  Can
>you provide the EXPLAIN plan for the query that's triggering the error?
>
>                       regards, tom lane
>


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