| Subject | Re: [firebird-support] Re: Group by date on a timestamp field |
|---|---|
| Author | Dimitry Sibiryakov |
| Post date | 2005-12-16T10:17:26Z |
On 16 Dec 2005 at 10:53, Ivan Prenosil wrote:
for sure that the expression is evaluated twice in this case.
Probably, whole branch of execution tree is copied.
--
SY, Dimitry Sibiryakov.
>> Because expressions in SELECT are calculated after expressions in:) You've caught me. I don't know how it is done exactly. I know
>> GROUP BY.
>
>Then why does this work ??
for sure that the expression is evaluated twice in this case.
Probably, whole branch of execution tree is copied.
--
SY, Dimitry Sibiryakov.