Re: Oddity with extract microseconds?

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Christopher Kings-Lynne <chriskl(at)familyhealth(dot)com(dot)au>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Oddity with extract microseconds?
Date: 2005-12-07 15:37:19
Message-ID: 439701AF.1060202@dunslane.net
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Christopher Kings-Lynne wrote:

>>> Why aren't 'minutes' considered too? Because they aren't 'seconds'.
>>> Well, seconds aren't microseconds either.
>>
>>
>> Yeah, they are: it's just one field. The other way of looking at it
>> (that everything is seconds) is served by "extract(epoch)".
>
>
> Well, it's different in MySQL unfortunately - what does the standard
> say? Out of interest, can someone try this for me in MySQL 5:
>
> SELECT EXTRACT (MICROSECOND FROM '2003-01-02 10:30:00.00123');
> SELECT EXTRACT (MICROSECOND FROM '2003-01-02 10:30:10.00123');

mysql 4.1.5 gives back 123 in both cases. I assume they haven't changed
that, although anything is possible.

cheers

andrew

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