Re: Comparing PostgreSQL and Oracle stability

Once it was here, so I paste to you:)
Oracle:
with variables &TypNiv = 0 et &Niv = 0

select
sum(t01_caf) SCAF,
sum(t01_itm_cnt) SART
from T01_&DateData
start with T01_upr_lvl_typ = &TypNiv and T01_upr_lvl_nbr = &Niv
connect by prior T01_lvl_typ = T01_upr_lvl_typ and prior T01_lvl_nbr =
T01_upr_lvl_nbr

Postgres:
\set TypNiv 0
\set Niv 0

select
sum(t01_caf) as SCAF,
sum(t01_itm_cnt) as SCAF
from t01_20011231
where
    strpos(t01_tree_sortkey,(select t01_tree_sortkey
                                    from t01_20011231
                                   where t01_upr_lvl_typ = :TypNiv
                                     and t01_upr_lvl_nbr = :Niv))=1;



C.

Jan Pruner wrote:
> Support PostgreSQL in some way hierarchical query like Oracle does?
> Select ... start with ... connect by ...  ???
>
> JP
>
> On Thursday 04 July 2002 11:18, you wrote:
>
>>>I'm considering porting code from Oracle to PostgreSql. I'm looking
>>>for opinions from people that are experienced with both PostgreSQL and
>>>Oracle:
>>>
>>>1) Is the stability better, equal or worse when comparing Oracle 9i?
>>>2) Are there any performance issues to be aware of when comparing
>>>PostgreSql an d Oracle (on the same hardware configuration) - eg. size
>>>of table colums, count of records in tables (and indexes).
>>>3) And how about the work for DB administrators - are things simpler
>>>or more complicated?
>>
>>First off, I don't have much experience with Oracle, but I have done a
>>couple things with it, and one of my colleagues has used it much more
>>extensively.
>>
>>1) stability - I have not had stability problems with a recent release of
>>postgresql. The developers sometimes mention potential problems, but I
>>haven't encountered one (at least after 7.1, before that I seem to rememb=
>
> er
>
>>a couple minor issues). I haven't heard of any problems with oracle.
>>
>>2) I can't provide you with any meaningful info about performance. I didn=
>
> 't
>
>>do any scientific performance comparison. One thing I can say, is that my
>>colleague needed to spend a lot of time giving hints to oracle because
>>(according to him) the planner was really bad and frequently made planning
>>errors.
>>
>>3) Much easier to administrate postgres. I gave up trying to get oracle
>>working myself.
>>
>>Regards,
>>    Jeff
>>
>>
>>
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>
>
> --=20
>          Pruner Jan
>        jan@pruner.cz
>      http://jan.pruner.cz/
> -----------------------------
> Only Robinson Crusoe had all his work done by Friday
>
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