Kevin Grittner wrote:
"Richard Neill" <rn...@cam.ac.uk> wrote:
date_trunc('day', timestamp '2010-01-20 10:16:55')
What happens with a "timestamp with time zone" literal?
-Kevin
Good call!
This query is fast:
SELECT count(1) FROM tbl_tracker WHERE ((srep_timestamp >=
date_trunc('day', timestamp with time zone '2010-01-20 10:16:55') AND
srep_timestamp < date_trunc('day', timestamp with time zone '2010-01-20
10:16:55') + INTERVAL '24 hour' )) ;
In other words:
#fast
WHERE column < '2010-010-20 00:00:00'
#fast
WHERE column < date_trunc('day', timestamp with time zone
'2010-01-20 10:16:55')
#slow
WHERE column < date_trunc('day', timestamp
'2010-01-20 10:16:55')
Why is that, I wonder?
Richard
--
Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-bugs
