| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | "John Rylander" <rylander(at)prolexia(dot)com> |
| Cc: | pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: BUG #2477: Aggregate Integer divisors incorrectly yield integer-type quotient |
| Date: | 2006-06-12 03:03:09 |
| Message-ID: | 29738.1150081389@sss.pgh.pa.us |
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| Lists: | pgsql-bugs |
"John Rylander" <rylander(at)prolexia(dot)com> writes:
> When for some reason I did a sum/count instead of an avg, the result was
> always an integer (either 0 or 1):
What's your point? Postgres has always defined division of integers as
yielding an integer result. AFAICS this choice is fully sanctioned by
the SQL standard:
1) If the data type of both operands of a dyadic arithmetic opera-
tor is exact numeric, then the data type of the result is exact
numeric, with precision and scale determined as follows:
...
d) The precision and scale of the result of division is
implementation-defined.
(SQL92 6.12 <numeric value expression> syntax rule 1)
> Yet another maddening PostgreSQL bug/idiosyncrasy. Time for this boy to go
> to Oracle
Sayonara. Last I checked, they had a few idiosyncrasies too.
regards, tom lane
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