On Wed, Dec 21, 2005 at 11:52:56 -0800,
Mark <[EMAIL PROTECTED]> wrote:
> Hello everybody,
>
> I'm looking for an elegant SQL statement that will work in
> Postgresql, MySQL and ORACLE.
> The query will be executed by Java client.
>
> To have this query for Postgresql is priority number one.
>
Michael Fuhr <[EMAIL PROTECTED]> writes:
> Unless I'm missing something that wouldn't use an index either,
> because the planner wouldn't know what value to compare start_date
> against without hitting each row to find that row's time_to_live.
> But something like this should be able to use an expr
On Thu, Dec 22, 2005 at 09:47:11AM -0600, Jim C. Nasby wrote:
> On Wed, Dec 21, 2005 at 11:52:56AM -0800, Mark wrote:
> > SELECT id
> > FROM mq
> > WHERE now - start_date > time_to_live;
>
> The problem is you can't use an index on this, because you'd need to
> index on (now() - start_date), wh
On Wed, Dec 21, 2005 at 11:52:56AM -0800, Mark wrote:
> SELECT id
> FROM mq
> WHERE now - start_date > time_to_live;
The problem is you can't use an index on this, because you'd need to
index on (now() - start_date), which obviously wouldn't work. Instead,
re-write the WHERE as:
WHERE start_da
Hello everybody,
I'm looking for an elegant SQL statement that will work in
Postgresql, MySQL and ORACLE.
The query will be executed by Java client.
To have this query for Postgresql is priority number one.
In this query I try to get a list of message Ids that expired.
time_to_live is in secon
