Hello,
2011.03.14 15:41, Merlin Moncure rašė:
WITH results as
(
SELECT distinct price_id as price_id
FROM ticket_price
JOIN ticket_has_ticket_price ON (price_id = thtp_price_id)
WHERE price_event_id = 7820 and (current_timestamp= price_date AND
current_timestamp= price_date_till)
)
Thank you, Tom for you answer
2011.03.14 19:17, Tom Lane rašė:
That function property*allows* the optimizer to
invoke the function fewer times than would happen in an un-optimized
query. It does not*require* it to do so.
Thank you for clearing that for me. I think these 2 sentences in
On Mon, Mar 14, 2011 at 3:46 AM, Julius Tuskenis jul...@nsoft.lt wrote:
Hello, Merlin
Thank you for your quick response.
2011.03.10 23:14, Merlin Moncure rašė:
This is a huge problem with non trivial functions in the select list.
Pushing the result into and a subquery does NOT guarantee
On Thursday, March 10, 2011 05:26:00 PM Julius Tuskenis wrote:
3) As STABLE function should be executed once for every different set of
parameters
Thats not true. Thats not what any of the volatility information (like STABLE,
IMMUTABLE, VOLATILE) does.
See
Hello, Merlin
Thank you for your quick response.
2011.03.10 23:14, Merlin Moncure rašė:
This is a huge problem with non trivial functions in the select list.
Pushing the result into and a subquery does NOT guarantee that the
inner result is materialized first.
From the postgresql documentation
Julius Tuskenis jul...@nsoft.lt writes:
From the postgresql documentation about STABLE functions: This
category allows the optimizer to optimize multiple calls of the function
to a single call. I thought that this means that optimizer executes the
function only for now parameter sets and
Hello, list
Our company is creating a ticketing system. Of course the performance
issues are very important to us (as to all of you I guess). To increase
speed of some queries stable functions are used, but somehow they don't
act exactly as I expect, so would you please explain what am I
On Thu, Mar 10, 2011 at 10:26 AM, Julius Tuskenis jul...@nsoft.lt wrote:
Hello, list
Our company is creating a ticketing system. Of course the performance issues
are very important to us (as to all of you I guess). To increase speed of
some queries stable functions are used, but somehow they
