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* Number of days in a tstzrange?
@ 2013-10-24 20:46 Craig R. Skinner <skinner@britvault.co.uk>
0 siblings, 1 reply; 5+ messages in thread
From: skinner@britvault.co.uk @ 2013-10-24 20:46 UTC (permalink / raw)
To: pgsql-sql
Hi folks,
How can the number of days contained within a range be found? (9.2)
For example, with these timestamp ranges,
get these (integer) number of days:
tstzrange('2013-10-01 07:00', '2013-10-01 07:15') | 1 (day)
tstzrange('2013-10-01 07:00', '2013-10-01 23:45') | 1 (day)
tstzrange('2013-10-01 02:00', '2013-10-02 23:45') | 2 (days)
tstzrange('2013-10-01 07:00', '2013-10-03 01:00') | 2 (days)
tstzrange('2013-10-01 01:00', '2013-10-03 23:00') | 3 (days)
tstzrange('2013-10-01 23:00', '2013-10-04 01:00') | 4 (days)
In my digging about, I've not found a builtin function for this.
Is is necessary pull out the lower() and upper() timestamp elements,
then get the date interval between them?
Cheers,
--
Craig Skinner | http://twitter.com/Craig_Skinner | http://linkd.in/yGqkv7
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^ permalink raw reply [nested|flat] 5+ messages in thread
* Re: Number of days in a tstzrange?
@ 2013-10-24 21:00 Jonathan S. Katz <jonathan.katz@excoventures.com>
parent: Craig R. Skinner <skinner@britvault.co.uk>
0 siblings, 1 reply; 5+ messages in thread
From: Jonathan S. Katz @ 2013-10-24 21:00 UTC (permalink / raw)
To: skinner@britvault.co.uk; +Cc: pgsql-sql
On Oct 24, 2013, at 4:46 PM, Craig R. Skinner wrote:
> Hi folks,
>
> How can the number of days contained within a range be found? (9.2)
>
> For example, with these timestamp ranges,
> get these (integer) number of days:
>
> tstzrange('2013-10-01 07:00', '2013-10-01 07:15') | 1 (day)
> tstzrange('2013-10-01 07:00', '2013-10-01 23:45') | 1 (day)
> tstzrange('2013-10-01 02:00', '2013-10-02 23:45') | 2 (days)
> tstzrange('2013-10-01 07:00', '2013-10-03 01:00') | 2 (days)
> tstzrange('2013-10-01 01:00', '2013-10-03 23:00') | 3 (days)
> tstzrange('2013-10-01 23:00', '2013-10-04 01:00') | 4 (days)
>
> In my digging about, I've not found a builtin function for this.
>
> Is is necessary pull out the lower() and upper() timestamp elements,
> then get the date interval between them?
Yes, you would have to call lower() and upper() to accomplish that.
Jonathan
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^ permalink raw reply [nested|flat] 5+ messages in thread
* Re: Number of days in a tstzrange?
@ 2013-10-29 11:34 Craig R. Skinner <skinner@britvault.co.uk>
parent: Jonathan S. Katz <jonathan.katz@excoventures.com>
0 siblings, 1 reply; 5+ messages in thread
From: skinner@britvault.co.uk @ 2013-10-29 11:34 UTC (permalink / raw)
To: pgsql-sql
On 2013-10-24 Thu 17:00 PM |, Jonathan S. Katz wrote:
>
> Yes, you would have to call lower() and upper() to accomplish that.
>
Here's my final solution inside a function's CUSROR LOOP:
DECLARE
billable_days integer;
...
..
BEGIN
...
...
SELECT
-- cast boundries to date
-- date - date = integer
upper(billable_item.billable_period)::date -
lower(billable_item.billable_period)::date
INTO
billable_days;
-- if a subscription is ceased same day it's started,
-- that day is still chargable, so bump it
IF billable_days < 1
THEN
billable_days := 1;
END IF;
...
...
Thanks,
--
Craig Skinner | http://twitter.com/Craig_Skinner | http://linkd.in/yGqkv7
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^ permalink raw reply [nested|flat] 5+ messages in thread
* Re: Number of days in a tstzrange?
@ 2013-10-30 10:40 Craig R. Skinner <skinner@britvault.co.uk>
parent: Craig R. Skinner <skinner@britvault.co.uk>
0 siblings, 1 reply; 5+ messages in thread
From: skinner@britvault.co.uk @ 2013-10-30 10:40 UTC (permalink / raw)
To: pgsql-sql
On 2013-10-29 Tue 11:34 AM |, Craig R. Skinner wrote:
>
> -- if a subscription is ceased same day it's started,
> -- that day is still chargable, so bump it
> IF billable_days < 1
> THEN
> billable_days := 1;
> END IF;
> ...
> ...
>
This is more accurate:
-- If a subscription billing_period ends part way through a day,
IF upper(billable_item.billable_period)::time <> time 'allballs'
THEN
-- That partial day is still chargable, so bump it
billable_days := billable_days + 1;
END IF;
--
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* Re: Number of days in a tstzrange?
@ 2013-10-30 18:21 Gavin Flower <GavinFlower@archidevsys.co.nz>
parent: Craig R. Skinner <skinner@britvault.co.uk>
0 siblings, 0 replies; 5+ messages in thread
From: Gavin Flower @ 2013-10-30 18:21 UTC (permalink / raw)
To: Craig R. Skinner <skinner@britvault.co.uk>; pgsql-sql
On 30/10/13 23:40, Craig R. Skinner wrote:
> On 2013-10-29 Tue 11:34 AM |, Craig R. Skinner wrote:
>> -- if a subscription is ceased same day it's started,
>> -- that day is still chargable, so bump it
>> IF billable_days < 1
>> THEN
>> billable_days := 1;
>> END IF;
>> ...
>> ...
>>
> This is more accurate:
>
> -- If a subscription billing_period ends part way through a day,
> IF upper(billable_item.billable_period)::time <> time 'allballs'
> THEN
> -- That partial day is still chargable, so bump it
> billable_days := billable_days + 1;
> END IF;
>
>
>
even for 1 second over???
I would expect any court of law to set a higher threshold!
Cheers,
Gavin
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end of thread, other threads:[~2013-10-30 18:21 UTC | newest]
Thread overview: 5+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2013-10-24 20:46 Number of days in a tstzrange? Craig R. Skinner <skinner@britvault.co.uk>
2013-10-24 21:00 ` Jonathan S. Katz <jonathan.katz@excoventures.com>
2013-10-29 11:34 ` Craig R. Skinner <skinner@britvault.co.uk>
2013-10-30 10:40 ` Craig R. Skinner <skinner@britvault.co.uk>
2013-10-30 18:21 ` Gavin Flower <GavinFlower@archidevsys.co.nz>
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