Re: [HACKERS] error on HAVING clause - Mailing list pgsql-hackers

From Bruce Momjian
Subject Re: [HACKERS] error on HAVING clause
Date
Msg-id 199804101329.JAA13073@candle.pha.pa.us
Whole thread Raw
In response to Re: [HACKERS] error on HAVING clause  ("Jose' Soares Da Silva" <sferac@proxy.bazzanese.com>)
List pgsql-hackers
>
> On Thu, 9 Apr 1998, Bruce Momjian wrote:
>
> Don't worry about time Bruce. I'm not in a hurry.
> HAVING is an important feature. Finally SELECT statement is complete.
> I would like to show you another thing about HAVING.

Honestly, I don't know who is right.  You are not using an aggregate in
the HAVING, so I have no idea how it is supposed to be handled.

>
> prova=> select sno,qty  from sp  group by sno,qty having qty = 300;
> sno  |qty
> -----+---
> S1   |100
> S1   |200
> S1   |300
> S1   |400
> S2   |300
> S2   |400
> S3   |200
> S4   |200
> S4   |300
> S4   |400
> (10 rows)
>
> prova=> select oid,sno,qty  from sp  group by sno,qty having qty = 300;
>    oid|sno  |qty
> ------+-----+---
> 147004|S1   |100
> 147001|S1   |200
> 147000|S1   |300
> 147002|S1   |400
> 147006|S2   |300
> 147007|S2   |400
> 147008|S3   |200
> 147009|S4   |200
> 147010|S4   |300
> 147011|S4   |400
> (10 rows)
>
> Solid give me another result. Who are rigth ?
>
> SOLID SQL Editor (teletype) v.02.20.0007
> select sno,qty  from sp  group by sno,qty having qty = 300;
> SNO                          QTY
> ---                          ---
> S1                           300.
> S2                           300.
> S4                           300.
> 3 rows fetched.
>
> Maybe this one is illegal, but it give me a strange output:
>
> prova=> select oid,sno,qty  from sp  having qty = 300;
>       |     |               <---------where is the title  ????
> ------+-----+---
> 147000|S1   |300
> 147001|S1   |200
> 147002|S1   |400
> 147003|S1   |200
> 147004|S1   |100
> 147005|S1   |100
> 147006|S2   |300
> 147007|S2   |400
> 147008|S3   |200
> 147009|S4   |200
> 147010|S4   |300
> 147011|S4   |400
> (12 rows)
>                                               Jose'
>
>


--
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